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Polaris® Low-Distortion Kinematic Mirror Mounts![]()
POLARIS-K2F Ø2" Mirror Mount (Mirror Not Included)
POLARIS-K1F2 Ø1" Mirror Mount POLARIS-K05F6 Ø1/2" Mirror Mount (Mirror Not Included)
US Patent 9,599,786 Related Items ![]() Please Wait ![]() Click to Enlarge POLARIS-K1F Ø1" Mount Cutaway Diagram (Ø2" Polaris Mounts Incorporate a Similar Optic Retention Design) Features
The Polaris® Low-Distortion Kinematic Mirror Mounts (US Patent 9,599,786) provide long-term pointing stability while minimizing optic surface distortion introduced by the mount. Optic Retention Polaris optic bores are precision machined to achieve a fit that will provide optimum beam pointing stability performance over changing environmental conditions such as temperature changes, transportation shock, and vibration. Each mount is designed to be used with an optic that is within +0.0 mm / -0.15 mm of the specified diameter; using an optic outside of this range will lead to diminished performance. For inquiries about mounts for other optic sizes, please contact Tech Support. Design Post Mounting Cleanroom and Vacuum Compatibility
Optic Installation To install an optic in one of our Polaris low-distortion mirror mounts, tighten the retaining ring until contact is made with the held optic; this will flatten the wave spring. Then back out the retaining ring by a 1/2 turn for our Ø1/2" mounts, between 1 - 2 turns for the Ø19 mm and Ø1.5" mounts, or 1.25 turns for our Ø25 mm, Ø1", Ø50 mm, and Ø2" mounts to achieve the optimal torque on the optic. Installing an Optic into a Polaris Low-Distortion MountEnsure that there is no grease, dirt, or dust in the optic bore or on the optic itself. Remove any particulates with clean compressed air and/or clean with methanol, acetone, or ethanol. The optic, indexed retention spring, and retaining ring are installed from the back of the mount, as shown in the animation to the right. Be sure the index tab is in the key way and touching the retaining ring; reversing the retention spring orientation will result in greater distortion of the optic. Gently turn the retaining ring using a Spanner Wrench until the optic makes contact with the three fingers on the faceplate. For our Ø1/2" mounts, the SPW603 or SPW603L spanner wrenches may be used; for our Ø19 mm mounts, the SPW801 spanner wrench may be used; for our Ø1.5" mounts, the SPW608 spanner wrench may be used; for the Ø1" and Ø25 mm mounts, either the SPW602 or SPW606 may be used; for our Ø2" and Ø50 mm mounts our SPW604 may be used. Securing Optics by Turning Back the Retaining Ring Securing Optics with a Torque Driver
The graphs below show the effect varying amounts of torque or turns of the optic retaining ring have on the surface of a 6 mm thick mirror mounted in a Ø1/2" Polaris mount, a 6 mm thick mirror mounted in a Ø19 mm Polaris mount, a 6 mm mirror mounted in a Ø25 mm or Ø1" Polaris mount, or a 12 mm thick mirror mounted in a Ø1.5", Ø50 mm or Ø2" Polaris mount. The shaded regions below illustrate the acceptable range of turns back. Minimal turns back should be used for setups that will be exposed to vibrations, while stationary setups may be able to accommodate more turns back. All flatness measurements are taken with a ZYGO interferometer, which uses a 633 nm beam. Please see the Low Distortion tab for more information on optic face distortion as a result of torque. Ø1/2" Low-Distortion Mounts![]() Click to Enlarge The dashed line indicates 0.10λ for reference. The shaded region represents the recommended torque range. 0.5 turns back from optic contact is recommended for secure mounting with minimal additional distortion caused by the mount. The black dots represent the torque and flatness yielded by using a standard spanner wrench and then loosening the retaining ring the number of turns indicated by the number below the dot. Data for torque values above the shaded region are given for reference and will yield distortion values significantly higher than 0.1 waves. Ø19 mm Low-Distortion Mounts![]() Click to Enlarge The data above shows the optic distortion for a 6 mm thick mirror mounted in the POLARIS-K19F4/M mount. The dashed line indicates 0.10λ for reference. A range of one to two turns back from optic contact is suggested for secure mounting with minimal additional distortion caused by the mount. However, this can vary based on the application Ø25 mm Low-Distortion Mounts![]() Click to Enlarge The data above shows the optic distortion for a 6 mm thick mirror mounted in the POLARIS-K25F4/M mount. The dashed line indicates 0.10λ for reference. A range of a half to two turns back from optic contact is suggested for secure mounting with minimal additional distortion caused by the mount. However, this can vary based on the application. Ø1.5" Low-Distortion Mounts![]() Click to Enlarge The data above shows the optic distortion for a 12 mm thick mirror mounted in the POLARIS-K15F4 mount. The dashed line indicates 0.10λ for reference. A range of one to two turns back from optic contact is suggested for secure mounting with minimal additional distortion caused by the mount. However, this can vary based on the application. Ø50 mm Low-Distortion Mounts![]() Click to Enlarge xThe data above shows the optic distortion for a 12 mm thick mirror mounted in the POLARIS-K50F4/M mount. The dashed line indicates 0.10λ for reference. A range of one to two turns back from optic contact is suggested for secure mounting with minimal additional distortion caused by the mount. However, this can vary based on the application. Ø1" Low-Distortion Mounts![]() Click to Enlarge The data above shows the optic distortion for a 6 mm thick mirror mounted in a Polaris® Ø1" Low-Distortion Mount. The dashed line indicates 0.10λ for reference. 1.25 turns back from optic contact is recommended for secure mounting with minimal additional distortion caused by the mount. Ø2" Low-Distortion Mounts![]() Click to Enlarge The data above shows the optic distortion for a 6 mm thick mirror mounted in a Polaris® Ø2" Low-Distortion Mount. The dashed line indicates 0.10λ for reference. 1.25 turns back from optic contact is recommended for secure mounting with minimal additional distortion caused by the mount. The error bars signify the standard deviation of the test results at every 0.25 turn interval. The spring will start to disengage from the optic at 3.25 turns back Mounting stresses are responsible for the strain on an optic that results in optic distortion. Minimizing distortion effects is crucial; any distortion to the optic is transmitted to the light that is reflected from it. Placing the 3-point mounting forces perpendicular to the face of the optic and indexing them directly opposite each other minimizes bending moments on the optic, thus reducing optic distortion. Typical 360° face mounts and side-located setscrew mounts create bending moments that cause optic distortion as seen in the drawings below. Spring loading the optic allows one to gradually tune the retention force, dampening stresses caused by temperature changes, and it provides a soft means of compensating for variances in manufacturing that can further produce stress on the optic. The finite element analysis results shown below show the displacement, stress, and strain applied to the optic for 20 oz-in of torque applied to the retaining ring of our POLARIS-K05F6 and POLARIS-K1F mounts and 10 oz-in of torque applied to the setscrew of the equivalent standard setscrew mount. The POLARIS-K05F1 and POLARIS-K05F2 use the same front plate as the POLARIS-K05F6 and will show similar performance. The POLARIS-K19F4/M, POLARIS-K25F4/M, POLARIS-K1F1, POLARIS-K1F2, POLARIS-K15F4, POLARIS-K50F4/M, and Ø2" low-distortion Polaris mounts also have a similar design and therefore will show similar performance to the POLARIS-K1F. Simulation Results for POLARIS-K05F6 Ø1/2" Low-Distortion Mount** The POLARIS-K05F1 and POLARIS-K05F2 low-distortion Polaris mounts will show similar performance to the POLARIS-K05F6. Simulation Results for POLARIS-K1F Ø1" Low-Distortion Mount** The POLARIS-K19F4/M, POLARIS-K25F4/M, POLARIS-K1F1, POLARIS-K1F2, POLARIS-K15F4, POLARIS-K50F4/M, and Ø2" low-distortion Polaris mounts will show similar performance to the POLARIS-K1F.
Optical Distortion Testing Using a ZYGO Phase-Shifting InterferometerA ZYGO Phase-Shifting Interferometer was used to perform wavefront distortion measurements on all Polaris Low-Distortion Mirror Mounts. The results of these tests can be found below. Ø1/2" MountsProcedure Results
Ø19 mm MountProcedure Results ![]() Click to Enlarge Retaining Ring Turned Back a 1/4 Turn ![]() Click to Enlarge Retaining Ring Turned Back a 1/2 Turn ![]() Click to Enlarge Retaining Ring Turned Back a 3/4 Turn ![]() Click to Enlarge Retaining Ring Turned Back 1 Turn ![]() Click to Enlarge Retaining Ring Turned Back 1.25 Turns ![]() Click to Enlarge Retaining Ring Turned Back 1.5 Turns ![]() Click to Enlarge Retaining Ring Turned Back 1.75 Turns ![]() Click to Enlarge Retaining Ring Turned Back 2 Turns
Ø25 mm MountsProcedure Results ![]() Click to Enlarge Retaining Ring Turned Back a 1/4 Turn ![]() Click to Enlarge Retaining Ring Turned Back a 1/2 Turn ![]() Click to Enlarge Retaining Ring Turned Back a 3/4 Turn ![]() Click to Enlarge Retaining Ring Turned Back 1 Turn ![]() Click to Enlarge Retaining Ring Turned Back 1.25 Turns ![]() Click to Enlarge Retaining Ring Turned Back 1.5 Turns ![]() Click to Enlarge Retaining Ring Turned Back 1.75 Turns ![]() Click to Enlarge Retaining Ring Turned Back 2 Turns
Ø1" MountsProcedure Results ![]() Click to Enlarge Retaining Ring Turned Back a 1/4 Turn ![]() Click to Enlarge Retaining Ring Turned Back a 1/2 Turn ![]() Click to Enlarge Retaining Ring Turned Back a 3/4 Turn ![]() Click to Enlarge Retaining Ring Turned Back 1 Turn ![]() Click to Enlarge Retaining Ring Turned Back 1.25 Turns ![]() Click to Enlarge Retaining Ring Turned Back 1.5 Turns ![]() Click to Enlarge Retaining Ring Turned Back 1.75 Turns ![]() Click to Enlarge Retaining Ring Turned Back 2 Turns
Ø1.5" MountsProcedure Results ![]() Click to Enlarge Retaining Ring Turned Back a 1/4 Turn ![]() Click to Enlarge Retaining Ring Turned Back a 1/2 Turn ![]() Click to Enlarge Retaining Ring Turned Back a 3/4 Turn ![]() Click to Enlarge Retaining Ring Turned Back 1 Turn ![]() Click to Enlarge Retaining Ring Turned Back 1.25 Turns ![]() Click to Enlarge Retaining Ring Turned Back 1.5 Turns ![]() Click to Enlarge Retaining Ring Turned Back 1.75 Turns ![]() Click to Enlarge Retaining Ring Turned Back 2 Turns
Ø50 mm MountsProcedure Results ![]() Click to Enlarge Retaining Ring Turned Back a 1/4 Turn ![]() Click to Enlarge Retaining Ring Turned Back a 1/2 Turn ![]() Click to Enlarge Retaining Ring Turned Back a 3/4 Turn ![]() Click to Enlarge Retaining Ring Turned Back 1 Turn ![]() Click to Enlarge Retaining Ring Turned Back 1.25 Turns ![]() Click to Enlarge Retaining Ring Turned Back 1.5 Turns ![]() Click to Enlarge Retaining Ring Turned Back 1.75 Turns ![]() Click to Enlarge Retaining Ring Turned Back 2 Turns
Ø2" MountsProcedure Results ![]() Click to Enlarge Retaining Ring Turned Back a 1/4 Turn ![]() Click to Enlarge Retaining Ring Turned Back a 1/2 Turn ![]() Click to Enlarge Retaining Ring Turned Back a 3/4 Turn ![]() Click to Enlarge Retaining Ring Turned Back 1 Turn ![]() Click to Enlarge Retaining Ring Turned Back 1.25 Turns ![]() Click to Enlarge Retaining Ring Turned Back 1.5 Turns ![]() Click to Enlarge Retaining Ring Turned Back 1.75 Turns ![]() Click to Enlarge Retaining Ring Turned Back 2 Turns Positional Repeatability After Thermal ShockThis testing was done to determine how reliably the mount returns the mirror, without hysteresis, to its initial position so that the alignment of the optical system is unaffected by the temperature shock. During the testing phase, the Polaris kinematic mirror mount was attached to a Ø1" stainless steel post secured to a stainless steel optical breadboard in a temperature-controlled environment. Each mount was secured to the post by an 8-32 cap screw with 16 in-lb of torque. The mirror was mounted (not glued) in the mirror mount, and 8 oz-in of torque was applied to the retaining ring for the Ø1/2" and Ø1" mounts. The retaining ring in the Ø19 mm and Ø1.5" mounts was backed out 1.5 turns from optic contact. The retaining ring in the Ø2" mounts was backed out 1.25 turns from optic contact; please see the Optic Installation tab for why we recommend against using a torque wrench with our Ø2" mounts. The beam from an independently temperature-stabilized diode laser was reflected off the mirror’s surface onto a position sensing detector. Procedure: Results: For Comparison:
![]() Click to Enlarge Design Features of the Polaris Low Distortion Mounts Several common factors typically lead to beam misalignment in an optical setup. These include temperature-induced hysteresis of the mirror's position, crosstalk, drift, and backlash. Polaris mirror mounts are designed specifically to minimize these misalignment factors and thus provide extremely stable performance. Hours of extensive research, multiple design efforts using sophisticated design tools such as finite element analysis software, and months of rigorous testing went into choosing the best components to provide an ideal solution for experiments requiring ultra-stable performance from a kinematic mirror mount. Thermal Hysteresis The method by which the mirror is secured in the mount is another important design factor; these Polaris mounts offer excellent performance without the use of adhesives. Instead, they have a three-point-contact faceplate, an indexed retention spring, and a stainless steel retaining ring that hold the optic in place. This design minimizes distortion on the optic surface while maintaining beam pointing stability. Crosstalk Drift and Backlash ![]() Click to Enlarge Polaris Mounts are Shipped Inside Two Vacuum Bag Layers Cleanroom and Vacuum Compatibility The sapphire contacts are bonded into place using a NASA-approved low outgassing procedure. In addition, DuPont LVP High-Vacuum (Krytox) Grease, an ultra-high-vacuum-compatible, low outgassing PTFE grease, is applied to the adjusters. These features provide high-vacuum compatibility and low outgassing performance. Please note that the 8-32 and M4 cap screws included with the Polaris mounts are not rated for pressures below 10-5 Torr. The vacuum bags do not contain any desiccant materials and tightly wrap the mount, preventing friction against the mount during shipping. This packing method protects the mount from corrosion, gas or liquid contamination, and particulates during transport. The first vacuum bag should be opened in a clean environment while the second vacuum bag should only be opened just prior to installation. When operating at pressures below 10-5 Torr, we highly recommend using an appropriate bake out procedure prior to installing the mount in order to minimize contamination caused by outgassing. Polaris kinematic mirror mounts are specifically designed to provide excellent performance under thermal changes and vibrations. Below are some usage tips to ensure that the mount provides optimal performance. Match Materials Mounting Options To install the POLARIS-LN1 lock nut without cross threading, gently place the lock nut against the end of the adjuster. "Unscrew" the nut until the threads of the nut and the adjuster align before threading the nut onto the adjuster. Mount Alignment Front Plate’s Position Polish and Clean the Points of Contact Not Recommended Adjuster Lock Nuts Low Incident Angles
Thorlabs offers several different general varieties of Polaris mounts, including kinematic side optic retention, SM-threaded, low optic distortion, piezo-actuated, and glue-in optic mounts, as well as a fixed monolithic mirror mount and fixed optic mounts. Click to expand the tables below and see our complete line of Polaris mounts, listed by optic bore size, and then arranged by optic retention method and adjuster type. We also offer a line of accessories that have been specifically designed for use with our Polaris mounts; these are listed in the table immediately below. If your application requires a mirror mount design that is not available below, please contact Tech Support.
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This Ø1/2" Polaris Low-Distortion Mirror Mount is designed to minimize optic distortion and provide long-term stability. This mount is equipped with a three-point-contact faceplate to mount the optic. The indexed optic retention spring makes contact with the optic at three locations, while the retaining ring has a calibrated adjustment stop to assist in providing the correct mounting torque. See the Optic Installation and Low Distortion tabs above for details. The POLARIS-K05F6 kinematic mirror mount is sold with one indexed optic retention spring (POLARIS-K05WS) and one retaining ring (POLARIS-SM05RRS40). These items are also available below for purchase separately should replacements be required. The 5/64" hex actuators may be adjusted with our HKTS-5/64 Hex Key Thumbscrew (available separately below) or any other 5/64" hex wrench. The mount includes three adjuster lock nuts. The beam can be held on target with a hex key while lightly tightening the lock nut by hand or with a 6 mm open-ended wrench. For applications that require frequent tuning of the adjusters, the lock nuts only need to be lightly tightened to a torque of approximately 4 to 8 oz-in (0.03 to 0.06 N·m). For long term stability, we recommend tightening to a torque of 24 oz-in, which can be achieved by using our TW6 preset torque wrench (sold below). Post mounting is provided by two #8 (M4) counterbored holes at 90°. Due to the shallow design of the counterbore, low-profile 8-32 and M4 cap screws are included for securing the mount to a post without obstructing the transmissive beam path. The 8-32 cap screw accepts a 5/64" hex wrench, while the M4 cap screw accepts a 2.5 mm hex wrench. For custom mounting configurations, Ø2 mm alignment pin holes are located on both sides of each counterbore for setting a precise location and mounting angle. Standard DIN 7-m6 ground dowel pins are recommended; for details, see the PDF drawing by clicking on the Docs icon ( a. Please note that these mounts are designed for Ø1/2" optics with a tolerance of +0/-0.005" and are not intended for use with the Ø12.5 mm metric mirror size. ![]() ![]() Click to Enlarge POLARIS-K05F1 2-Low-Profile-Adjuster, Low-Distortion Mount
These 2-adjuster Ø1/2" Polaris Kinematic Mirror Mounts are similar to the standard 3-adjuster version sold above but feature a hardened steel ball in place of the third adjuster. They use an integrated, stainless-steel, matched adjuster/body design for greater durability than standard mirror mounts. Our Polaris 2-adjuster mounts are sold with one indexed optic retention spring (POLARIS-K05WS) and one retaining ring (POLARIS-SM05RRS40). These items are also available below for purchase separately should replacements be required. For fitting into tight spaces, the POLARIS-K05F1 mount is equipped with low-profile hex actuators that are 0.15" (3.8 mm) shorter than the adjusters on the POLARIS-K05F2; due to the shorter actuators, the POLARIS-K05F1 does not include lock nuts. The POLARIS-K05F2 mount has standard-profile 5/64" hex adjusters and includes two adjuster lock nuts that can be tightened by holding the adjuster with a 5/64" (2 mm) hex key while tightening the lock nut by hand or with a 6 mm open-ended wrench. For applications that require frequent tuning of the adjusters, the lock nuts only need to be lightly tightened to a torque of approximately 4 to 8 oz-in (0.03 to 0.06 N·m). For long term stability, we recommend tightening to a torque of 24 oz-in, which can be achieved by using our TW6 preset torque wrench (sold below). Post mounting is provided by two #8 (M4) counterbored holes at 90°. Due to the shallow design of the counterbore, low-profile 8-32 and M4 cap screws are included for securing the mount to a post without obstructing the transmissive beam path. The 8-32 cap screw accepts a 5/64" hex wrench, while the M4 cap screw accepts a 2.5 mm hex wrench. For custom mounting configurations, Ø2 mm alignment pin holes are located on both sides of each counterbore for setting a precise location and mounting angle. Standard DIN 7-m6 ground dowel pins are recommended; for details, see the PDF drawing by clicking on the Docs icon ( a. Please note that these mounts are designed for Ø1/2" optics with a tolerance of +0/-0.005" and are not intended for use with the Ø12.5 mm metric mirror size. ![]() ![]() Click to Enlarge Two dowel pin holes on either side of the #8 counterbore are visible on the side of the mount. Also visible are the through holes on the actuator.
This 2-adjuster Ø19 mm Polaris Low-Distortion Mirror Mount is designed to minimize optic distortion and provide long-term stability. This mount is equipped with a three-point-contact faceplate to mount the optic. The indexed optic retention spring makes contact with the optic at three locations, while the retaining ring has a calibrated adjustment stop to assist in providing the correct mounting torque. See the Optic Installation and Low Distortion tabs above for details. One of the three contact points of the faceplate incorporates a spring-loaded ball contact that aids in further reducing optic distortion; this is pictured in yellow in the cutaway diagram at the top of the Overview tab. Please note that this ball contact is factory set and it should not be adjusted or removed. The POLARIS-K19F4/M kinematic mirror mount is sold with one indexed optic retention spring (POLARIS-K19WS) and one retaining ring (POLARIS-SM19RRS40). These items are also available below for purchase separately should replacements be required. a. Please note that these mounts are designed for Ø19 mm optics with a tolerance of +0/-0.15 mm. To order custom Ø19 mm optics, please contact Tech Support. ![]() ![]() Click to Enlarge Two dowel pin holes on either side of the #8 counterbore are visible on the side of the mount. Also visible are the through holes on the actuator.
This 2-adjuster Ø25 mm Polaris Low-Distortion Mirror Mount is designed to minimize optic distortion and provide long-term stability. This mount is equipped with a three-point-contact faceplate to mount the optic. The indexed optic retention spring makes contact with the optic at three locations, while the retaining ring has a calibrated adjustment stop to assist in providing the correct mounting torque. See the Optic Installation and Low Distortion tabs above for details. One of the three contact points of the faceplate incorporates a spring-loaded ball contact that aids in further reducing optic distortion; this is pictured in yellow in the cutaway diagram in the top of the Overview tab. Please note that this ball contact is factory set and it should not be adjusted or removed. The POLARIS-K25F4/M kinematic mirror mount is sold with one indexed optic retention spring (POLARIS-K1WS) and one retaining ring (POLARIS-SM1RRS40). These items are also available below for purchase separately should replacements be required. The adjusters on this mount can be locked using the POLARIS-LN1 lock nut or POLARIS-LNS1 locking collar (sold separately below). The beam can be held on target with the adjuster thumbscrew or hex key while lightly tightening the lock nut or locking collar by hand. Alternatively, a 13 mm hex open-ended wrench may be used to tighghten the POLARIS-LN1 lock nut, and a POLARIS-T2 spanner wrench may be used to tighten the POLARIS-LNS1 locking collar (see below for details). For applications that require frequent tuning of the adjusters, the lock nut or locking collar only needs to be lightly tightened to a torque of approximately 4 to 8 oz-in (0.03 to 0.06 N·m). For long term stability, we recommend tightening to a torque of 32 oz-in, which can be achieved by using our TW13 preset torque wrench (sold below). a. Please note that these mounts are designed for Ø25 mm optics with a tolerance of +0/-0.15 mm. To order custom Ø25 mm optics, please contact Tech Support. ![]()
This Ø1" Polaris Low-Distortion Mirror Mount is designed to minimize optic distortion and provide long-term stability. This mount features a three-point-contact faceplate to mount the optic. The indexed optic retention spring makes contact with the optic at three locations, while the retaining ring has a calibrated adjustment stop to assist in providing the correct mounting torque. See the Optic Installation and Low Distortion tabs above for details. One of the three contact points of the faceplate incorporates a spring-loaded ball contact that also provides an adjustable mounting surface to further limit optic distortion; this is pictured in yellow in the cutaway diagram in the top of the Overview tab. Please note that this ball contact is factory set and it should not be adjusted or removed. The POLARIS-K1F kinematic mirror mount is sold with one indexed optic retention spring (POLARIS-K1WS) and one retaining ring (POLARIS-SM1RRS40). These items are also available below for purchase separately should replacements be required. The knobs on the 100 TPI adjusters are removable; with the knobs removed, the position can be adjusted with our HKTS-5/64 hex key thumbscrew (sold below), or any other 5/64" hex wrench. The adjusters can be locked using POLARIS-LN1 lock nut or POLARIS-LNS1 locking collar, which are available separately below. The beam can be held on target with the adjuster thumbscrew or hex key while lightly tightening the lock nut or locking collar by hand. Alternatively, a 13 mm hex open-ended wrench may be used for the POLARIS-LN1 lock nut, and a POLARIS-T2 spanner wrench may be used to tighten the POLARIS-LNS1 locking collar (see below for details). For applications that require frequent tuning of the adjusters, the lock nut or locking collar only needs to be lightly tightened to a torque of approximately 4 to 8 oz-in (0.03 to 0.06 N·m). For long term stability, we recommend tightening to a torque of 32 oz-in, which can be achieved by using our TW13 preset torque wrench (sold below). Post mounting is provided by two #8 (M4) counterbored holes at 90°. 8-32 and M4 cap screws are included. For setting a precise location and mounting angle in custom mounting configurations, Ø2 mm alignment pin holes are located on both sides of each counterbore. Standard DIN 7-m6 ground dowel pins are recommended; for details, see the PDF drawing by clicking on the Docs icon ( a. Please note that these mounts are designed for Ø1" optics with a tolerance of +0/-0.005". ![]() ![]() Click to Enlarge POLARIS-K1F2 2-Adjuster, Hex-Driven, Low-Distortion Mount ![]() Click to Enlarge POLARIS-K1F1 with POLARIS-LN1 lock nut installed. Two dowel pin holes on either side of the #8 counterbore are visible on the side of the mount.
These 2-adjuster Ø1" Polaris Kinematic Mirror Mounts are similar to the standard 3-adjuster version sold above but feature a hardened steel ball in place of the third adjuster. They use an integrated matched adjuster/body design for greater durability. Both knob- and hex-driven versions of the 2-adjuster mount are available. These mounts have undergone extensive testing to ensure high-quality performance. Each of these Polaris 2-adjuster kinematic mirror mounts is sold with one indexed optic retention spring (POLARIS-K1WS) and one retaining ring (POLARIS-SM1RRS40). These items are also available below for purchase separately should replacements be required. The knobs on the POLARIS-K1F1 100 TPI adjusters are removable; with the knobs removed, the position can be adjusted with our HKTS-5/64 hex key thumbscrew (sold below), or any other 5/64" hex wrench. The adjusters can be locked using POLARIS-LN1 lock nut or POLARIS-LNS1 locking collar, which are available below. The beam can be held on target with the adjuster thumbscrew or hex key while lightly tightening the lock nut or locking collar by hand. Alternatively, a 13 mm hex open-ended wrench may be used for the POLARIS-LN1 lock nut, and a POLARIS-T2 spanner wrench may be used to tighten the POLARIS-LNS1 locking collar (see below for details). For applications that require frequent tuning of the adjusters, the lock nut or locking collar only needs to be lightly tightened to a torque of approximately 4 to 8 oz-in (0.03 to 0.06 N·m). For long term stability, we recommend tightening to a torque of 32 oz-in, which can be achieved by using our TW13 preset torque wrench (sold below). Post mounting is provided by two #8 (M4) counterbored holes at 90°. 8-32 and M4 cap screws are included. For custom mounting configurations, Ø2 mm alignment pin holes are located on both sides of each counterbore for setting a precise location and mounting angle. Standard DIN 7-m6 ground dowel pins are recommended; for details, see the PDF drawing by clicking on the Docs icon a. Please note that these mounts are designed for Ø1" optics with a tolerance of +0/-0.005". ![]() ![]() Click to Enlarge Two dowel pin holes on either side of the #8 counterbore are visible on the side of the mount. Also visible are the through holes on the actuator.
This 2-adjuster Ø1.5" Polaris Low-Distortion Mirror Mount is designed to minimize optic distortion and provide long-term stability. This mount is equipped with a three-point-contact faceplate to mount the optic. The indexed optic retention spring makes contact with the optic at three locations, while the retaining ring has a calibrated adjustment stop to assist in providing the correct mounting torque. See the Optic Installation and Low Distortion tabs above for details. One of the three contact points of the faceplate incorporates a spring-loaded ball contact that aids in further reducing optic distortion; this is pictured in yellow in the cutaway diagram at the top of the Overview tab. Please note that this ball contact is factory set and it should not be adjusted or removed. The POLARIS-K15F4 kinematic mirror mount is sold with one indexed optic retention spring (POLARIS-K15WS) and one retaining ring (POLARIS-SM15RRS55). These items are also available below for purchase separately should replacements be required. The adjusters can be locked using POLARIS-LN1 lock nut or POLARIS-LNS1 locking collar, available below. The beam can be held on target with an adjuster thumbscrew or hex key while lightly tightening the lock nut or locking collar by hand. Alternatively, a 13 mm hex open-ended wrench may be used for the POLARIS-LN1 lock nut, and a POLARIS-T2 spanner wrench may be used to tighten the POLARIS-LNS1 locking collar (see below for details). For applications that require frequent tuning of the adjusters, the lock nut or locking collar only needs to be lightly tightened to a torque of approximately 4 to 8 oz-in (0.03 to 0.06 N·m). For long term stability, we recommend tightening to a torque of 32 oz-in, which can be achieved by using our TW13 preset torque wrench (sold below). a. Please note that these mounts are designed for Ø1.5" optics with a tolerance of +0/-0.005". To order custom Ø1.5" optics, please contact Tech Support. ![]() ![]() Click to Enlarge Two dowel pin holes on either side of the #8 counterbore are visible on the side of the mount. Also visible are the through holes on the actuator.
This 2-adjuster Ø50 mm Polaris Low-Distortion Mirror Mount is designed to minimize optic distortion and provide long-term stability. This mount is equipped with a three-point-contact faceplate to mount the optic. The indexed optic retention spring makes contact with the optic at three locations, while the retaining ring has a calibrated adjustment stop to assist in providing the correct mounting torque. See the Optic Installation and Low Distortion tabs above for details. One of the three contact points of the faceplate incorporates a spring-loaded ball contact that aids in further reducing optic distortion; this is pictured in yellow in the cutaway diagram in the top of the Overview tab. Please note that this ball contact is factory set and it should not be adjusted or removed. The POLARIS-K50F4/M kinematic mirror mount is sold with one indexed optic retention spring (POLARIS-K2WS) and one retaining ring (POLARIS-SM2RRS70). These items are also available below for purchase separately should replacements be required. The 2-adjuster design of this mount improves stability by limiting the available degrees of freedom for movement. The 100 TPI adjusters feature three Ø0.07" through holes that allow for actuation from the side using our precision-fit SA1 Side Hole Adjustment Tool or a 1/16" (1.5 mm) balldriver or hex key. For details, see the PDF drawing by clicking on the Docs icon ( a. Please note that these mounts are designed for Ø50 mm optics with a tolerance of +0/-0.15 mm. To order custom Ø50 mm optics, please contact Tech Support. ![]() ![]() Click to Enlarge POLARIS-K2F3 3-Adjuster, Low-Distortion Mount ![]() Click to Enlarge POLARIS-K2F with POLARIS-LN1 lock nut installed. Two dowel pin holes and #8 counterbores are visible on the side of the mount.
This Ø2" Polaris Low-Distortion Mirror Mount is designed to minimize optic distortion and provide long-term stability. This mount features a three-point-contact faceplate to mount the optic. The indexed optic retention spring makes contact with the optic at three locations, while the retaining ring has a calibrated adjustment stop to assist in providing the correct mounting torque. See the Optic Installation and Low Distortion tabs above for details. One of the three contact points of the faceplate incorporates a spring-loaded ball contact that also provides an adjustable mounting surface to further limit optic distortion; this is pictured in yellow in the cutaway diagram in the top of the Overview tab. Please note that this ball contact is factory set and it should not be adjusted or removed. Each kinematic mirror mount is sold with one indexed optic retention spring (POLARIS-K2WS) and one retaining ring (POLARIS-SM2RRS70). These items are also available below for purchase separately should replacements be required. The knobs on the POLARIS-K2F 100 TPI adjusters are removable; with the knobs removed, the position can be adjusted with our HKTS-5/64 hex key thumbscrew (available separately below) or any other 5/64" hex wrench. The adjusters can be locked using POLARIS-LN1 lock nut or POLARIS-LNS1 locking collar, which are available below. The beam can be held on target with the adjuster thumbscrew or hex key while lightly tightening the lock nut or locking collar by hand. Alternatively, a 13 mm hex open-ended wrench may be used for the POLARIS-LN1 lock nut, and a POLARIS-T2 spanner wrench may be used to tighten the POLARIS-LNS1 locking collar (see below for details). For applications that require frequent tuning of the adjusters, the lock nut or locking collar only needs to be lightly tightened to a torque of approximately 4 to 8 oz-in (0.03 to 0.06 N·m). For long term stability, we recommend tightening to a torque of 32 oz-in, which can be achieved by using our TW13 preset torque wrench (sold below). Post mounting is provided by four #8 (M4) counterbored holes. 8-32 and M4 cap screws are included. For custom mounting configurations, Ø2 mm alignment pin holes are located on both sides of each counterbore for setting a precise location and mounting angle. Standard DIN 7-m6 ground dowel pins are recommended; for details, see the PDF drawing by clicking on the Docs icon ( a. Please note that these mounts are designed for Ø2" optics with a tolerance of +0/-0.005". ![]() ![]() Click to Enlarge POLARIS-K2F2 2-Adjuster, Low-Distortion Mount ![]() Click to Enlarge POLARIS-K2F1 with POLARIS-LN1 lock nut installed. Two dowel pin holes on either side of the #8 counterbore are visible on the side of the mount.
These 2-adjuster Ø2" Polaris Kinematic Mirror Mounts are similar to the standard 3-adjuster version sold above but feature a hardened steel ball in place of the third adjuster. They use an integrated matched adjuster/body design for greater durability. Both knob- and hex-driven versions of the 2-adjuster mount are available. These mounts have undergone extensive testing to ensure high-quality performance. Each kinematic mirror mount is sold with one indexed optic retention spring (POLARIS-K2WS) and one retaining ring (POLARIS-SM2RRS70). These items are also available below for purchase separately should replacements be required. The knobs on the POLARIS-K2F1 100 TPI adjusters are removable; with the knobs removed, the position can be adjusted with our HKTS-5/64 hex key thumbscrew (available separately below) or any other 5/64" hex wrench. The adjusters can be locked using POLARIS-LN1 lock nut or POLARIS-LNS1 locking collar, which are available below. The beam can be held on target with the adjuster thumbscrew or hex key while lightly tightening the lock nut or locking collar by hand. Alternatively, a 13 mm hex open-ended wrench may be used for the POLARIS-LN1 lock nut, and a POLARIS-T2 spanner wrench may be used to tighten the POLARIS-LNS1 locking collar (see below for details). For applications that require frequent tuning of the adjusters, the lock nut or locking collar only needs to be lightly tightened to a torque of approximately 4 to 8 oz-in (0.03 to 0.06 N·m). For long term stability, we recommend tightening to a torque of 32 oz-in, which can be achieved by using our TW13 preset torque wrench (sold below). Post mounting is provided by four #8 (M4) counterbored holes. 8-32 and M4 cap screws are included. For custom mounting configurations, Ø2 mm alignment pin holes are located on both sides of each counterbore for setting a precise location and mounting angle. Standard DIN 7-m6 ground dowel pins are recommended; for details, see the PDF drawing by clicking on the Docs icon ( a. Please note that these mounts are designed for Ø2" optics with a tolerance of +0/-0.005". ![]() ![]() Click to Enlarge F25USK2 Knob Shown Attached to a POLARIS-K1 Mirror Mount
This removable adjustment knob is compatible with many of our 1/4"-100 adjusters, including those used in the Ø1" and Ø2" Polaris Kinematic Mounts and our Polaris Kinematic Platform Mount. The larger Ø0.925" size provides additional angular resolution over the standard Polaris knobs. Please note that the F25USK2 knob is not compatible with Polaris mounts that use side-hole adjusters. The recessed bore of knob is not deep enough to allow the knob to engage the threads on the side-hole adjuster. ![]() ![]() Click to Enlarge POLARIS-K1C4 Mount with Optic and Optional POLARIS-N5 Removable Knobs
The Polaris® Removable Knobs for 1/4"-100 Adjusters allows the user to adjust a Polaris kinematic mirror mount by hand. The knobs can be used with select Polaris mounts, listed in the table to the right. Note that when the knobs are used with any of these mounts, they will block the side through holes on the adjuster. The adjuster screw's 5/64" (2 mm) hex socket is still usable when the knobs are attached. The knobs are made from chemically cleaned and heat-treated 303 stainless steel that provides vacuum compatibility down to 10-9 Torr at 25 °C with proper bake out (10-5 Torr at 25 °C without bake out). POLARIS-K1C4 and POLARIS-K1S4 Mounts purchased before September 21, 2016 cannot be used with the POLARIS-N5 Removable Knobs sold here. To order compatible knobs, please contact Tech Support. ![]()
These 5/64" Hex Key Adjuster Thumbscrews allow for quick adjustment of many 5/64" and 2 mm hex-driven actuators (or standard actuators with the knobs removed). These temporary knobs can be left in the screw's hex socket between adjustments for convenience (see photo to the right). An 8-32 setscrew (5/64" hex) secures the replaceable hex bit, which can be reversed if the tip is stripped. Contact Tech Support to order replacement hex key bits. We offer hex key thumbscrews in sizes from 0.050" to 3/16" and 2 mm to 5 mm. ![]() ![]() Click to Enlarge The SA1 Adjusting a POLARIS-K1S4 Using the Side Holes and Rear Hex
The Side Hole Adjustment Tool features a Ø0.07" precision-fit tip designed for Polaris mounts with side hole adjusters. The handle features a 5/64" (2.0 mm) hex allowing the SA1 to act as a small knob, and the central nut is compatible with a 6.0 mm wrench allowing for a longer lever arm. The precision-fit tip minimizes backlash during adjustments and the depth stop allows the tool to rest securely in a side hole between adjustments. On Ø25 mm mirror mounts and larger, the 1.62" length allows the tool to adjust the actuator 360° without interfering with the other adjuster on the back of the mount. The SA1 is made of chemically cleaned, hardened, super alloy stainless steel for durability and compatibility with clean environments. The tool is also magnetic allowing it to be easily retrieved from tight or sensitive setups using a magnet. ![]() To install a lock nut without cross threading, gently place the lock nut against the end of the adjuster. "Unscrew" the nut until the threads of the nut and the adjuster align before threading the nut onto the adjuster. This animation shows the installation of a POLARIS-LN1 lock nut on a POLARIS-K1F1 low distortion mount. ![]() Click to Enlarge POLARIS-LN05 Lock Nuts on a POLARIS-K19S4 Mount
These lock nuts are designed for use with Polaris kinematic mounts that do not use low-profile adjusters. The POLARIS-LN05 lock nut can be used with 3/16"-130 adjusters, while the POLARIS-LN1 lock nut is for 1/4"-100 adjusters. Designed for long-term adjuster stability or applications that are exposed to shock and vibration, these lock nuts are pre-greased with the same ultra-high-vacuum-compatible, low-outgassing PTFE grease as the Polaris mounts and have been tested for adjuster fit. For applications that require frequent tuning of the adjusters, the lock nuts only need to be lightly tightened by hand to a torque of approximately 4 to 8 oz-in (0.03 to 0.06 N·m). If long term stability is required, the torque wrenches below can be used to apply the appropriate amount of torque to each lock nut (see the table below for torque values). POLARIS-LN05 lock nuts require a 6 mm hex tool for tightening, while POLARIS-LN1 lock nuts require a 13 mm hex tool. To avoid cross threading the lock nut, place it against the adjuster and "unscrew" the lock nut until you feel a slight drop; then thread the lock nut onto the adjuster. ![]()
This locking collar is compatible with Polaris mounts that have 1/4"-100 adjusters, excluding the piezo-driven mounts and mounts with low-profile adjusters (Item #s POLARIS-K1-H and POLARIS-K1-2AH). Designed for long-term adjuster stability or applications that are exposed to shock and vibration, these locking collars are pre-greased with the same ultra-high-vacuum-compatible, low-outgassing PTFE grease as the Polaris mounts and have been tested for adjuster fit. The POLARIS-T2 spanner wrench has been specifically designed for use in securing the POLARIS-LNS1 locking collar. The double spanner head enables complete engagement while the design allows locking collar adjustments to be along the same line as the adjuster itself. A center through hole allows a 2 mm ball driver to pass through the spanner wrench, so that the adjuster can be held in position while the locking collar is engaged. For applications that require frequent tuning of the adjusters, the locking collar only needs to be lightly tightened to a torque of approximately 4 to 8 oz-in (0.03 to 0.06 N·m). For long term stability, we recommend tightening to a torque of 32 oz-in, which can be achieved by using our TW13 preset torque wrench (sold below) in combination with the POLARIS-T2 spanner wrench. To avoid cross threading the locking collar, place it against the adjuster and "unscrew" the collar until you feel a slight drop; then thread the collar onto the adjuster. ![]() ![]() Click to Enlarge TW6 Torque Wrench Used to Secure POLARIS-LN05 Lock Nut on POLARIS-K05T2 Mirror Mount ![]() Click to Enlarge Each wrench is engraved with its preset torque value and item #.
These torque wrenches have a preset torque value to secure the lock nuts on Polaris mounts for long-term locking; see the table below for specifications. When the preset torque value has been achieved, the break-over design will cause the pivoting joint to "break," as shown to the right. The wrench's hex head will move back into place once the force is removed. This design prevents further force from being applied to the lock nut. Engraved guidelines indicate the angle the wrench should pivot in order to apply the specified torque; pivoting the handle past these guidelines will over-torque the lock nut. Each wrench is also engraved with its preset torque value, torque direction, wrench size, and item # for easy identification in the field. Please note that these wrenches are not intended for use in applications where adjusters are frequently tuned, as these applications typically require torque values of 4 to 8 oz-in (0.03 to 0.06 N·m).
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