Mounted Penta Prism


  • 90° Deviation of Beam or Image without Changing Polarization Handedness
  • N-BK7 Prism with Aluminum-Coated Reflective Faces
  • 30 mm Cage Cube Mount with SM1-Threaded Ports

CCM1-PS932

Penta Prisms Deviate the Incident Light by 90° without Inverting or Reversing the Image

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Penta-Prism Cage Compatibility
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Mounted Penta Prisms are Compatible with Thorlabs' 30 mm Cage System
Penta-Prism Cage Compatibility
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The CCM1-PS932(/M) features two SM1-threaded ports and has two closed sides to minimize light leakage.
Optic Cleaning Tutorial
Transmission of Uncoated N-BK7
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Features

  • Deviate Beams without Reversal or Inversion of the Beam Profile
  • 90º Beam Deviation is Insensitive to Beam/Prism Alignment
  • N-BK7 Prism with Aluminum-Coated Reflective Faces
  • Post Mountable and 30 mm Cage System Compatible
  • Compatible with SM1-Threaded (1.035"-40) Components
  • Connect Two Cage Cubes Side by Side with the CM1-CC Cage Cube Connector

Penta prisms deviate incident light by 90° without inverting or reversing the image (i.e., without changing the polarization handedness). Additionally, the 90° image deviation is independent of the orientation of the prism with respect to the incident beam or image, making penta prisms an effective alternative to turning mirrors. The only limitation on alignment is the >Ø12 mm clear aperture of the housing.

Thorlabs' Mounted Penta Prism is fabricated from N-BK7 with two aluminized reflective faces protected by an Inconel and black paint overcoat. It features a clear aperture of >Ø12 mm and is mounted inside a standard 30 mm cage system cage cube. The prism is epoxied within a cage cube mount and cannot be removed. Note that the beam exits the cage cube mount at 90° ± 20 arcmin. 

Cage System Compatibility
The housing provides an 8-32 (M4) tap for post mounting, SM1-threaded (1.035"-40) input and output ports, and eight 4-40-tapped holes for cage rods on the entrance and exit faces. The CCM1-PS932(/M) features two SM1-threaded ports and has two closed sides to minimize light leakage. The penta prism cage cube can be connected to other cage cubes using cage rods and ERSCB adapters or can be connected side-by-side to other cage cubes with our CM1-CC connector. The CM1-CC cage cube connector can only be used on the entrance and exit faces of these cubes. 

Other Cage Cube Options
We also offer 10, 20, 40, and 60 mm unmounted penta prisms. Empty 30 mm cage cubes are available for mounting our 20 mm unmounted penta prism. For a complete selection of our cube-mounted optics please see the Mounted Optics Guide tab.

Selection Guide for Prisms

Thorlabs offers a wide variety of prisms, which can be used to reflect, invert, rotate, disperse, steer, and collimate light. For prisms and substrates not listed below, please contact Tech Support.

Beam Steering Prisms

Prism Material Deviation Invert Reverse or Rotate Illustration Applications
Right Angle Prisms N-BK7, UV Fused Silica, Calcium Fluoride, or Zinc Selenide 90° 90° No 1

90° reflector used in optical systems such as telescopes and periscopes.

180° 180° No 1

180° reflector, independent of entrance beam angle.

Acts as a non-reversing mirror and can be used in binocular configurations.

TIR Retroreflectors
(Unmounted and Mounted)
and Specular Retroreflectors
(Unmounted and Mounted)
N-BK7 180° 180° No Retroreflector

180° reflector, independent of entrance beam angle.

Beam alignment and beam delivery. Substitute for mirror in applications where orientation is difficult to control.

Unmounted Penta Prisms
and
Mounted Penta Prisms
N-BK7 90° No No 1

90° reflector, without inversion or reversal of the beam profile.

Can be used for alignment and optical tooling.

Roof Prisms N-BK7 90° 90° 180o Rotation 1

90° reflector, inverted and rotated (deflected left to right and top to bottom).

Can be used for alignment and optical tooling.

Unmounted Dove Prisms
and
Mounted Dove Prisms
N-BK7 No 180° 2x Prism Rotation 1

Dove prisms may invert, reverse, or rotate an image based on which face the light is incident on.

Prism in a beam rotator orientation.

180° 180° No 1

Prism acts as a non-reversing mirror.

Same properties as a retroreflector or right angle (180° orientation) prism in an optical setup.

Wedge Prisms N-BK7 Models Available from 2° to 10° No No 1

Beam steering applications.

By rotating one wedged prism, light can be steered to trace the circle defined by 2 times the specified deviation angle.

No No Wedge Prism Pair

Variable beam steering applications.

When both wedges are rotated, the beam can be moved anywhere within the circle defined by 4 times the specified deviation angle.

Coupling Prisms Rutile (TiO2) or GGG Variablea No No Coupling Prism

High index of refraction substrate used to couple light into films.

Rutile used for nfilm > 1.8

GGG used for nfilm < 1.8

  • Depends on Angle of Incidence and Index of Refraction


Dispersive Prisms

Prism Material Deviation Invert Reverse or Rotate Illustration Applications
Equilateral Prisms F2, N-SF11, Calcium Fluoride,
or Zinc Selenide
Variablea No No

Dispersion prisms are a substitute for diffraction gratings.

Use to separate white light into visible spectrum.

Dispersion Compensating Prism Pairs Fused Silica, Calcium Fluoride, SF10, or N-SF14 Variable Vertical Offset No No Dispersion-Compensating Prism Pair

Compensate for pulse broadening effects in ultrafast laser systems.

Can be used as an optical filter, for wavelength tuning, or dispersion compensation.

 

Pellin Broca Prisms N-BK7,
UV Fused Silica,
or Calcium Fluoride
90° 90° No 1

Ideal for wavelength separation of a beam of light, output at 90°.

Used to separate harmonics of a laser or compensate for group velocity dispersion.

  • Depends on Angle of Incidence and Index of Refraction

Beam Manipulating Prisms

Prism Material Deviation Invert Reverse or Rotate Illustration Applications
Anamorphic Prism Pairs N-KZFS8 or
N-SF11
Variable Vertical Offset No No 1

Variable magnification along one axis.

Collimating elliptical beams (e.g., laser diodes)

Converts an elliptical beam into a circular beam by magnifying or contracting the input beam in one axis.

Axicons UV Fused Silica
or Zinc Selenide
Variablea No No 1

Creates a conical, non-diverging beam with a Bessel intensity profile from a collimated source.

  • Depends on Prism Physical Angle

Polarization Altering Prisms

Prism Material Deviation Invert Reverse or Rotate Illustration Applications
Glan-Taylor, Glan-Laser, and α-BBO Glan-Laser Polarizers Glan-Taylor:
Calcite

Glan-Laser:
α-BBO or Calcite
p-pol. - 0°

s-pol. - 112°a
No No Glan-Taylor Polarizer

Double prism configuration and birefringent calcite produce extremely pure linearly polarized light.

Total Internal Reflection of s-pol. at the gap between the prism while p-pol. is transmitted.

Rutile Polarizers Rutile (TiO2) s-pol. - 0°

p-pol. absorbed by housing
No No Rutile Polarizer Diagram

Double prism configuration and birefringent rutile (TiO2) produce extremely pure linearly polarized light.

Total Internal Reflection of p-pol. at the gap between the prisms while s-pol. is transmitted.

 

Double Glan-Taylor Polarizers Calcite p-pol. - 0°

s-pol. absorbed by housing
No No Glan-Taylor Polarizer

Triple prism configuration and birefringent calcite produce maximum polarized field over a large half angle.

Total Internal Reflection of s-pol. at the gap between the prism while p-pol. is transmitted.

Glan Thompson Polarizers Calcite p-pol. - 0°

s-pol. absorbed by housing
No No Glan-Thompson Polarizer

Double prism configuration and birefringent calcite produce a polarizer with the widest field of view while maintaining a high extinction ratio.

Total Internal Reflection of s-pol. at the gap between the prism while p-pol. is transmitted.

Wollaston Prisms and
Wollaston Polarizers
Quartz, Magnesium Fluoride, α-BBO, Calcite, Yttrium Orthovanadate Symmetric
p-pol. and
s-pol. deviation angle
No No Wollaston Prism

Double prism configuration and birefringent calcite produce the widest deviation angle of beam displacing polarizers.

s-pol. and p-pol. deviate symmetrically from the prism. Wollaston prisms are used in spectrometers and polarization analyzers.

Rochon Prisms Magnesium Fluoride
or
Yttrium Orthovanadate
Ordinary Ray: 0°

Extraordinary Ray: deviation angle
No No

Double prism configuration and birefringent MgF2 or YVO4 produce a small deviation angle with a high extinction ratio.

Extraordinary ray deviates from the input beam's optical axis, while ordinary ray does not deviate.

Beam Displacing Prisms Calcite 2.7 or 4.0 mm Beam Displacement No No Beam Displacing Prism

Single prism configuration and birefringent calcite separate an input beam into two orthogonally polarized output beams.

s-pol. and p-pol. are displaced by 2.7 or 4.0 mm. Beam displacing prisms can be used as polarizing beamsplitters where 90o separation is not possible.

Fresnel Rhomb Retarders N-BK7 Linear to circular polarization

Vertical Offset
No No Fresnel Rhomb Quarter Wave

λ/4 Fresnel Rhomb Retarder turns a linear input into circularly polarized output.

Uniform λ/4 retardance over a wider wavelength range compared to birefringent wave plates.

Rotates linearly polarized light 90° No No Fresnel Rhomb Half Wave

λ/2 Fresnel Rhomb Retarder rotates linearly polarized light 90°.

Uniform λ/2 retardance over a wider wavelength range compared to birefringent wave plates.

  • S-polarized light is not pure and contains some P-polarized reflections.

Beamsplitter Prisms

Prism Material Deviation Invert Reverse or Rotate Illustration Applications
Beamsplitter Cubes N-BK7 50:50 splitting ratio, 0° and 90°

s- and p- pol. within 10% of each other
No No Non-polarizing Beamsplitter

Double prism configuration and dielectric coating provide 50:50 beamsplitting nearly independent of polarization.

Non-polarizing beamsplitter over the specified wavelength range.

Polarizing Beamsplitter Cubes N-BK7, UV Fused Silica, or N-SF1 p-pol. - 0°

s-pol. - 90°
No No Polarizing Beamsplitter Cube

Double prism configuration and dielectric coating transmit p-pol. light and reflect s-pol. light.

For highest polarization use the transmitted beam.

30 mm Cage-Cube-Mounted Optics Selection Guide

The table below provides links to all of our 30 mm Cage-Cube-Mounted optics. For our selection of 16 mm Cage-Cube-Mounted Optics, please see our 16 mm Cage Systems guide.

Non-Polarizing Beamsplitters Polarizing Beamsplitters High Power Polarizing Beamsplitters
Non-Polarizing Beamsplitter Cube Polarizing Beamsplitter Cube High-Power Polarizing Beamsplitter Cube
Pellicle Beamsplitter Laser Line Polarizing Beamsplitters Circular Polarizer
Pellicle Beamsplitters Laser Line Polarizing Beamsplitter Cube Circular / Variable Polarizers
Penta Prisms Turning Mirrors Variable Beamsplitters/Attenuators
Penta Prisms Turning Mirrors Variable Beamsplitters / Attenuators

30 mm Cage Cube Empty Optic Mounts Selection Guide

Dichroic Mirror Holder Empty Compact Cage Cube
Rectangular Dichroic Mirrors and Filters Empty Compact 30 mm Cage Cube

Posted Comments:
user  (posted 2017-06-14 19:25:59.073)
I understand the prism is epoxied to the mount, but can the two parts of the mount still be separated? I would like the prism (with one half of the mount) to be removable from my optical setup.
tfrisch  (posted 2017-06-26 04:09:50.0)
Hello, thank you for contacting Thorlabs. The cage on top of the base can be removed by removing the 4 screws along the bottom of the cage. This would mean the setup would have to be attached to the cage and the base could drop out if you do not post mount the base. Please reach out to TechSupport@Thorlabs.com if you would like to discuss further.

Cube-Mounted Penta Prisms

Specifications
Prism
Surface Quality 40-20 Scratch-Dig
Surface Flatness <λ/10 at 633 nm
Angular Tolerances ±1 arcmin
Reflective Beam Angle 90° ± 20 arcmina
Reflective Coating Aluminum with Inconel
and Black Paint Overcoat
Material N-BK7b
Dimensions A = B = C = 20 mm
L1 = L2 = 28.3 mm
Dimensional Tolerance ±0.1 mm
Unmounted Prism Item # PS932
Assembly
Outer Dimensions 1.50" x 1.50" x 1.50"
(38.1 mm x 38.1 mm x 38.1 mm)
Clear Aperture >Ø12 mmc
Cage Cube Material Anodized Aluminum
Mounting Hole Imperial: 8-32 Tapped Hole
Metric: M4 Tapped Hole
  • The deviation of a beam exiting the prism is ±1 arcmin, whereas the deviation of the beam exiting the prism when mounted in the housing is ±20 arcmin.
  • Click Link for Detailed Specifications on the Substrate
  • The clear aperture of the mounted prism is limited by the housing.
  • 20 mm Penta Prism Mounted in a SM1-Compatible Cage Cube
  • Deviate Beams without Reversal or Inversion of the Beam Profile
  • 90º Beam Deviation is Insensitive to Beam/Prism Alignment

Thorlabs' Cube-Mounted Penta Prisms are constructed with a 20 mm
penta prism in a 30 mm cage cube with two closed sides to minimize light leakage. These penta prisms deviate incident light by 90° without inverting or reversing the image. Each prism is fabricated from N-BK7 with two aluminized reflective faces protected by an Inconel black paint overcoat. The mechanical housing for these optics limits the clear aperture to >Ø12.0 mm.


Prism Dimension Schematic
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
CCM1-PS932 Support Documentation
CCM1-PS932Customer Inspired! 30 mm Cage Cube-Mounted Penta Prism, >Ø12 mm Clear Aperture, 8-32 Tap
$165.56
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CCM1-PS932/M Support Documentation
CCM1-PS932/MCustomer Inspired! 30 mm Cage Cube-Mounted Penta Prism, >Ø12 mm Clear Aperture, M4 Tap
$165.56
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Cage Cube Connector

C4W-CC Application
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View Imperial Product List
Item #QtyDescription
C4W130 mm Cage Cube
C6W130 mm Cage Cube, Ø6 mm Through Holes
CCM1-4ER1Compact Clamping 4-Port Prism/Mirror 30 mm Cage Cube, 8-32 Tap
C4W-CC130 mm Cage Cube Connector for C4W and C6WR Series Cubes
CM1-CC1Cage Cube Connector for Compact 30 mm Cage Cubes
View Metric Product List
Item #QtyDescription
C4W130 mm Cage Cube
C6W130 mm Cage Cube, Ø6 mm Through Holes
CCM1-4ER/M1Compact Clamping 4-Port Prism/Mirror 30 mm Cage Cube, M4 Tap
C4W-CC130 mm Cage Cube Connector for C4W and C6WR Series Cubes
CM1-CC1Cage Cube Connector for Compact 30 mm Cage Cubes
A C4W and C6W Cage Cube connected to a 1.5" wide CCM1-4ER Compact Cage Cube using the C4W-CC and CM1-CC Cube Connectors, respectively.
CM1-CC Application
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View Imperial Product List
Item #QtyDescription
BA2T21Adjustable Mounting Base, 2" x 3" x 3/8"
CM1-CC2Cage Cube Connector for Compact 30 mm Cage Cubes
CCM1-BS014130 mm Cage Cube-Mounted Non-Polarizing Beamsplitter, 700 - 1100 nm, 8-32 Tap
CCM1-PBS252130 mm Cage Cube-Mounted Polarizing Beamsplitter Cube, 620-1000 nm, 8-32 Tap
CCM1-4ER1Compact Clamping 4-Port Prism/Mirror 30 mm Cage Cube, 8-32 Tap
PH21Ø1/2" Post Holder, Spring-Loaded Hex-Locking Thumbscrew, L = 2"
TR21Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 2"
View Metric Product List
Item #QtyDescription
BA2T2/M1Adjustable Mounting Base, 50 mm x 75 mm x 10 mm
CM1-CC2Cage Cube Connector for Compact 30 mm Cage Cubes
CCM1-BS014130 mm Cage Cube-Mounted Non-Polarizing Beamsplitter, 700 - 1100 nm, 8-32 Tap
CCM1-PBS252130 mm Cage Cube-Mounted Polarizing Beamsplitter Cube, 620-1000 nm, 8-32 Tap
CCM1-4ER/M1Compact Clamping 4-Port Prism/Mirror 30 mm Cage Cube, M4 Tap
PH50/M1Ø12.7 mm Post Holder, Spring-Loaded Hex-Locking Thumbscrew, L=50 mm
TR50/M1Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 50 mm
CM1-CC Connecting Multiple 1.5" Wide Cage Cubes
  • Connect Two 1.5" Wide Cage Cubes Side by Side
  • Connect a 1.5" Wide Cage Cube to a 2" Wide Cage Cube
  • Compatible with CM1 or CCM1 Series Cage Cubes

The CM1-CC cage cube connector allows two or more CM1 or CCM1 style cubes to be connected as shown in the image to the right. The CM1 and CCM1 series of cage cubes, which are all compatible with this connector, include empty cubes, empty dichroic cubes, mounted beamsplitters, mounted penta prisms, and mounted turning mirrors. The CM1-CC cage cube connector includes four 4-40 button-head screws, two 4-40 flat-head screws, four washers, and a 1/16" hex key.

Two cage cube-mounted turning mirrors cannot be connected using the CM1-CC due to a lack of Ø6 mm cage rod holes on two sides of the cube.

We also offer the C4W-CC to connect two 2" wide 30 mm cage cubes. Both C4W-CC and CM1-CC cage cube connectors can be used to connect one 1.5" wide 30 mm cage cube, such as our CCM1-4ER(/M), with a 2" wide 30 mm cage cube. 

Alignment Pins
Please note that because dowel alignment pins are used, the connector requires drilled holes on the cube face between the SM1-threaded (1.035"-40) ports. If you have an older cube and would like it updated to have alignment holes for free, please contact Technical Support. Alternatively, the alignment pins are press-fit inside their mounting holes, and can be pressed out for use with cubes that do not have these alignment holes.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
CM1-CC Support Documentation
CM1-CCCage Cube Connector for Compact 30 mm Cage Cubes
$48.70
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