SM1 Compatible Rotation Mounts
RSP1C: Mount Ø1" (Ø25.4 mm) Optics up To 0.51" (12.8 mm) Thick
Compatible with SM1 Lens Tubes
One SM1RR Retaining Ring Included
Post Mountable via an 8-32 (M4) Tapped Hole
Our Ø1" RSP1 and RSP1C rotation mounts utilize two precision bearings for smooth, backlash-free rotation. The apertures are threaded with our internal SM1 threading to accept Ø1" (Ø25.4 mm) optics. One SM1RR threaded retaining ring is included with each mount, which is used to hold an optic up to 0.47" (12 mm) thick for the RSP1 and 0.51" (12.8 mm) thick with the RSP1C mount. The SM1 threading also provides a means to connect SM1 lens tubes and other Thorlabs components to the mount.
Both mounts feature a knurled edge for adjusting rotation and a 360° laser-engraved scale marked at 2° increments allows for precise, repeatable positioning and fine angular adjustment. For calibration purposes, the scale on the RSP1C can be unlocked and rotated so that it can be aligned to the axis of an optic (i.e., fast axis of a waveplate). A top-located setscrew can be tightened to lock the rotation of the mount. The RSP1's scale cannot be adjusted like the RSP1C's.
The PRM1 is ideal for mounting either our SM1PM10 or SM1PM15 Polarizing Prism Mount, both of which feature compatible SM1 threading. It can be purchased bundled with our SM1PM10 (Item# PRM1GL10 below), which together provide 360° of high precision rotation for either our GL10 or GT10 polarizing prism (sold separately).
The PRM1 is also compatible with our 30 mm cage system. The unit can be mounted to a cage system using ER cage assembly rods attached to the four front face taps. The PRM1 and PRM1GL10 are also available in metric versions.
This animation details the operation of the RSP1X15.
The RSP1X15 rotation mount features both continuous 360° rotation and 15° stepped rotation for Ø1" (Ø25.4 mm) optics. The optic is retained in the central SM1-threaded bore using the included SM1RR retaining ring. The top of the mount has a setscrew that, when loosened, allows for smooth, continuous, 360° rotation. Tightening the setscrew engages a detent mechanism that forces the mount to rotate in discrete 15° increments. In addition, the engraved scale can be unlocked and rotated independently of the optic so that the markings can be aligned with respect to the mounted optic. For example, the zero of the engraved scale can be aligned with the fast axis of a wave plate or the polarization axis of a linear polarizer. To help with the alignment, an engraved arrow extends the zero mark all the way to the outside edge of the SM1-threaded bore used to mount the optic. The animation to the right shows the moveable scale of the RSP1X15 being rotated to align with the fast axis of a wave plate; it also shows the engagement of the indexing mechanism.
This animation shows the CLR1 being installed in an SM1 lens tube setup. The cylindrical lens installed in the CLR1 rotates, while the lens tubes remain stationary.
The CLR1 (/M) is a rotation mount designed for use with Ø1" round cylindrical lenses and other rotationally sensitive optics within a lens tube system. As round cylindrical lenses only focus or expand light in one dimension, they are not easily aligned within a standard lens mount or lens tube. This rotation mount can be sandwiched between two lens tubes to provide rotation of the mounted optic without disturbing the attached lens tubes. The back side of this mount utilizes an SM1 quick release adapter, which allows the mount to be quickly disconnected and reconnected to a lens tube setup. Please note that this adapter must be removed while inserting an optic in the mount, but once the optic is mounted, the adapter can be reattached.
Holds Ø1" (Ø25.4 mm) Optics up to 0.35" (8.9 mm) Thick
Laser Engraved Graduation Marks Every 2° Labeled Every 20°
The LM1-A is an SM1 threaded mounting carriage for Ø1" (Ø25 mm) optics that can be nested inside of an LM1-B (LM1-B/M) post mountable ring. The engraved angular scale on the outside edge of the LM1-A mounting carriage makes it easy to orient the carriage inside of the mounting ring.
2° Graduations on Dial, Labeled Every 20°
30 mm Cage System Compatible
The CRM1 (CRM1/M) is designed to mount Ø1" (Ø25 mm) optics up to 10 mm thick in an SM1 threaded rotation carriage. The optic is secured using the included SM1RR retaining ring (the SPW602 spanner wrench is ideal for tightening this retaining ring). For thicker optics, any of our SM1 series of lens tubes can be threaded into the carriage or the CRM1L can be used instead. The smooth rotation mechanism allows for precise positioning of the rotation carriage. The CRM1 is designed to be mounted in a 30 mm cage structure.
This animation shows the manual rotation and micrometer engagement of the CRM1P.
The CRM1P(/M) is designed to mount Ø1" (Ø25.4 mm) optics up to 9.4 mm thick in an SM1 threaded rotation carriage. The optic is secured using the included SM1RR retaining ring (the SPW602 spanner wrench is ideal for tightening this retaining ring). For thicker optics, any of our SM1 series of lens tubes can be threaded into the carriage. The smooth rotation mechanism on the CRM1P(/M) can be manually rotated to any position. When the rotation carriage is locked, the high-precision, backlash-free micrometer can then be used to fine tune the position of the rotation carriage over a range ±7°. The animation to the right illustrates how the CRM1P is used. The Vernier scale provides a resolution of 5 arcmin between consecutive marks. As the mount is rotated across the entire Vernier scale, there is a cumulative error of up to ±12.28 arcmin. The CRM1P(/M) is compatible with the 30 mm cage system and the 8-32 (M4) tapped mounting hole allows the rotation mount to be put on a TR series post.
This mount is also mechanically compatible with Ø25.0 mm optics, but we only recommend this for applications in which the centration of the optics is not critical.
1° Graduations on Main Dial
Vernier Scale Provides 5 arcmin Resolution
2.4 arcmin per Micrometer Division
When Locked, Micrometer-Driven ±5° of Fine Rotation
Load Capacity for Coarse Adjustment: 25 lbs (11.25 kg)
Load Capacity for Fine Adjustment: 3.75 lbs (1.7 kg)
Accepts Ø1" Optics up to 0.70" Thick
The PR01 Precision Rotation Platform combines easy-to-use manual rotation with high-precision, backlash-free micrometer adjustment. While the platform dial is in an unlocked state, continuous smooth rotation can be measured using the 1º graduation marks. When locked via the steel thumbscrew (visible in image above), the dial is adjusted by a ±5º micrometer drive system, offering 5 arcmin. resolution from the side vernier. For even higher angular resolution, the vernier can be used to calibrate the micrometer head graduations to as low as 1 arcmin. across a ±5º range with an accuracy of better than 1%. The PR01 has a load capacity of 25 pounds.
The SM1 (1.035"-40) tapped hole provides a Ø0.94" (24 mm) clear aperture at the base and 0.75" (19 mm) of usable thread. An array of 1/4"-20 (M6), #6-32 (M4), and #4-40 tapped holes offer a range of mounting options. While the 1/4"-20 (M6) tapped holes are for general purpose mounting, the #6-32 (M4) tapped holes provide compatibility with our PM1/PM2 series of clamping arms for applications including prism mounting. The #4-40 tapped holes are spaced for direct compatibility with our 30 mm Cage System rod spacing.
For optomechanical applications requiring a solid center rather than the SM1 tapped hole, the PR01A adapter plate is available.
Four 1/4" (M6) clearance slots are spaced for direct fastening to an optical table. An additional 1/4"-20 (M6) tapped hole on the edge opposite the micrometer drive allows for vertical mounting.
The XYR1 is a low profile XY axis translation stage with continuous rotation about the Z axis. The central SM1-threaded through-hole allows the stage to be used in an imaging application that requires illumination from underneath the sample. The stage contains an array of 1/4"-20 (M6) and #8-32 (M4) tapped holes for mounting samples and components. In addition, the stage has eight #4-40 tapped holes around the central through-hole so that it can be used with Thorlabs' 30 mm or 60 mm cage system without the use of adapters.
The X and Y axis micrometers on the translation stage have a travel range of 1/2" (13 mm). An engraved angular scale along the outer edge of the stage's mounting surface allows the user to set the angular orientation of the stage, which can then be fixed using a locking setscrew. Locking the rotation axis does not prevent translation along the X and Y axes. To prevent attached components from interfering with the stage’s rotation or translation, the top surface of the rotation platform is above the frame of the XYR1.
The central aperture of the PRM1Z8 rotation mount has a standard SM1 internal thread, for compatibility with a range of optics. Two SM1RR retaining rings are included to secure optical components in this aperture. Four #4-40 holes are provided so that the PRM1Z8 can be incorporated into a cage system. Additional threaded mounting holes allow for the addition of accessories or post mounting (See Mounting tab).
The PRM1Z8 is supplied with 19.6" (0.5 m) of cable. An 8 ft (2.5 m) extension cable (PAA632) is available separately.
The PRM1Z8E (PRM1/MZ8E) bundles the PRM1Z8 (PRM1/MZ8) Motorized Rotation Mount with our TDC001 T-Cube DC Servo Motor Controller, an ideal companion for smooth, continuous motion that can be automated via the software interface. The bundle ships complete with a TPS001 universal power supply, which includes a location-specific adapter.
The PRM1Z8E (PRM1/MZ8E) are supplied with 19.6" (0.5 m) of cable. An 8 ft (2.5 m) extension cable (PAA632) is available separately.
The rotating platform features several accessories. The central aperture has a standard SM1 internal thread, for compatibility with a range of optics. Four #4-40 holes are provided so that the PRM1Z8 can be incorporated into a cage system. Additional threaded mounting holes allow for the addition of accessories or post mounting.
The PRM1SP1 (PRM1SP1/M) accessory plate is fixed to the rotating top plate by two 6-32UNC (M3) bolts (supplied), allowing any of Thorlabs' standard 3 mm tongue & groove accessories (optic mounts, diode holders, fiber chucks etc) to be used. Using this plate, the total deck height becomes 1.1" (28 mm).
The PRM1SP3 base plate is similar to the PRM1SP2 described opposite, but delivers a total deck height of 2.26" (57.5 mm). If used together with the PRM1SP1 described above, the deck height is 2.43" (62.5 mm) and is compatibe with our range of 3-axis stages (NanoMax, MicroBlock, PiezoBlock and RollerBlock).
The PRM1SP2 base plate is used to provide a more stable installation solution, with a deck height of 1.15" (29 mm). If used together with the PRM1SP1 described above, the deck height is 1.32" (34 mm).
Please see the PRM1Z8 product page for more details.