Create an Account  |   Log In

View All »Matching Part Numbers


Your Shopping Cart is Empty
         

Right-Angle Prisms


  • Deviate Beam or Image by 90° or 180°
  • Material: N-BK7, UV Fused Silica, CaF2, or ZnSe
  • AR-Coated Versions Available

PS913

N-BK7, Uncoated
60 mm

PS704

CaF2, Uncoated
25 mm

PS701

ZnSe, Uncoated
10 mm

PS910

N-BK7, Uncoated
10 mm

Application Idea

PS610 Prism on a
KM100PM Platform Mount

Related Items


Please Wait
Optic Cleaning Tutorial

Features

  • Sizes Ranging from 3 mm to 60 mm
  • Fabricated from N-BK7, UV Fused Silica, CaF2, or ZnSe
  • N-BK7 Prisms Available with an AR Coating on the Hypotenuse or Both Legs

Available in sizes ranging from 3 mm to 60 mm, Thorlabs' high precision Right-Angle Prisms can be used to deviate a light path by 90° or 180°, depending on which surface is used as the input for the light source. These prisms are fabricated from N-BK7, UV fused silica, CaF2, or ZnSe. Our N-BK7 prisms are available uncoated or with one of our three standard broadband antireflection coatings (-A: 350 - 700 nm, -B: 650 - 1050 nm, -C: 1050 - 1700 nm) on either the hypotenuse or both legs, thereby reducing surface losses.

Due to total internal reflection (TIR), Video 1 (to the left below) demonstrates how the right angle prism can be used as a 90° reflector. When the input light is incident on one of the prism's legs, it undergoes TIR at the glass/air boundary of the hypotenuse and exits via the other prism leg. This 90° deviation of the input light makes the right angle prism a suitable alternative for a mirror.

Video 2 (to the right below) shows how the right-angle prism can be used as a 180° retroreflector. When the input light is incident on the face of the hypotenuse, it undergoes TIR at the glass/air boundary at the prism legs. It undergoes TIR a second time at the next prism leg and exits the hypotenuse in a path parallel to that of the input beam. Like the retroreflector, the 180° deviation of the light path is independent of the angle at which the light enters the prism.

Please refer to the Prism Guide tab above for assistance in selecting the appropriate prism for your application. For additional antireflecton coating requests, please contact Tech Support.

Video 1. Right Angle Prism Acting as a 90° Reflector
Video 2. Right Angle Prism Acting as a 180° Retroreflector
General Specifications
Material UV Fused Silicab N-BK7a, b CaF2b ZnSeb
Clear Aperture 70% of Face Length and Width
Surface Quality 40-20 Scratch-Dig 60-40 Scratch-Dig
Surface Flatness @ 633 nm λ/10 λ/2
Number of Polished Faces 3 (Triangular Faces are Fine Ground)
  • For the PS911K, please see the specifications listed to the right.
  • Click Link for Detailed Specifications on the Substrate Glass
PS911K Knife-Edge Prism Specifications
Material N-BK7a
Clear Aperture
(Legs)
Entire Face Length And Width Excluding a 1.25 mm Border Along Beveled Edges (No Bevel Between the Two Legs)
Clear Aperture
(Hypotenuse)
90% of Face Length and Width
Surface Quality 20-10 Scratch-Dig
Surface Flatness
@ 633 nm
λ/8
Number of Polished Faces 3 (Triangular Faces are Fine Ground)
  • Click Link for Detailed Specifications on the Substrate Glass
Right Angle Prism Drawing

Uncoated Prisms

Item # Material A = B
(mm)
C
(mm)
H
(mm)
Angle
Tolerance
Dimensional
Tolerance
PS605 UV Fused Silicaa 3 4.2 3 ±10 arcmin ±0.2 mm
PS609 5 7.1 5 ±3 arcmin ±0.2 mm
PS610 10 14.1 10 ±3 arcmin ±0.2 mm
PS614 12.5 17.7 12.5 ±3 arcmin ±0.2 mm
PS615 15 21.2 15 ±3 arcmin ±0.2 mm
PS608 20 28.3 20 ±3 arcmin ±0.2 mm
PS611 25 35.4 25 ±3 arcmin ±0.2 mm
PS612 40 56.6 40 ±3 arcmin ±0.2 mm
PS613 60 84.9 60 ±3 arcmin ±0.2 mm
PS905 N-BK7 3 4.2 3 ±10 arcmin ±0.1 mm
PS909 5 7.1 5 ±3 arcmin ±0.1 mm
PS910 10 14.1 10 ±3 arcmin ±0.1 mm
PS914 12.5 17.7 12.5 ±3 arcmin ±0.2 mm
PS915 15 21.2 15 ±3 arcmin ±0.2 mm
PS908 20 28.3 20 ±3 arcmin ±0.1 mm
PS911 25 35.4 25 ±3 arcmin ±0.1 mm
PS912 40 56.6 40 ±3 arcmin ±0.1 mm
PS913 60 84.9 60 ±3 arcmin ±0.1 mm
PS703 CaF2 10 14.1 10 ±10 arcmin +0.0/-0.3 mm
PS706 12.5 17.7 12.5 ±10 arcmin ±0.2 mm
PS707 15 21.2 15 ±10 arcmin ±0.2 mm
PS704 25 35.4 25 ±10 arcmin +0.0/-0.3 mm
PS701 ZnSe 10 14.1 10 ±10 arcmin +0.0/-0.3 mm
PS702 25 35.4 25 ±10 arcmin +0.0/-0.3 mm
  • Corning Code 7980 Standard Grade Fused Silica

Coated Prisms

Item # Material A = B
(mm)
C
(mm)
H
(mm)
Angle
Tolerance
Dimensional
Tolerance
AR Coating AR Coating
Performance
PS910H-A N-BK7 10.0 14.1 10.0 ±3 arcmin ±0.1 mm 350 - 700 nm, Hypotenuse Ravg ≤ 0.5% at AOI = 0°
Over Specified Wavelength Range
PS910H-B ±3 arcmin ±0.1 mm 650 - 1050 nm, Hypotenuse
PS910H-C ±3 arcmin ±0.1 mm 1050 - 1700 nm, Hypotenuse
PS910L-A ±3 arcmin ±0.1 mm 350 - 700 nm, Legs
PS910L-B ±3 arcmin ±0.1 mm 650 - 1050 nm, Legs
PS910L-C ±3 arcmin ±0.1 mm 1050 - 1700 nm, Legs
PS914H-A 12.5 17.7 12.5 ±3 arcmin ±0.2 mm 350 - 700 nm, Hypotenuse
PS914H-B ±3 arcmin ±0.2 mm 650 - 1050 nm, Hypotenuse
PS914H-C ±3 arcmin ±0.2 mm 1050 - 1700 nm, Hypotenuse
PS914L-A ±3 arcmin ±0.2 mm 350 - 700 nm, Legs
PS914L-B ±3 arcmin ±0.2 mm 650 - 1050 nm, Legs
PS914L-C ±3 arcmin ±0.2 mm 1050 - 1700 nm, Legs
PS915H-A 15.0 21.2 15.0 ±3 arcmin ±0.2 mm 350 - 700 nm, Hypotenuse
PS915H-B ±3 arcmin ±0.2 mm 650 - 1050 nm, Hypotenuse
PS915H-C ±3 arcmin ±0.2 mm 1050 - 1700 nm, Hypotenuse
PS915L-A ±3 arcmin ±0.2 mm 350 - 700 nm, Legs
PS915L-B ±3 arcmin ±0.2 mm 650 - 1050 nm, Legs
PS915L-C ±3 arcmin ±0.2 mm 1050 - 1700 nm, Legs
PS908H-A 20.0 28.3 20.0 ±3 arcmin ±0.1 mm 350 - 700 nm, Hypotenuse
PS908H-B ±3 arcmin ±0.1 mm 650 - 1050 nm, Hypotenuse
PS908H-C ±3 arcmin ±0.1 mm 1050 - 1700 nm, Hypotenuse
PS908L-A ±3 arcmin ±0.1 mm 350 - 700 nm, Legs
PS908L-B ±3 arcmin ±0.1 mm 650 - 1050 nm, Legs
PS908L-C ±3 arcmin ±0.1 mm 1050 - 1700 nm, Legs

Right Angle Prism Coating Reflectance

Right Angle Prism Drawing

UV Fused Silica Index of Refraction
Click to Enlarge

Click here for Raw Data
N-BK7 Index of Refraction
Click to Enlarge

Click here for Raw Data
CaF2 Index of Refraction
Click to Enlarge

Click here for Raw Data
Zinc Selenide Index of Refraction
Click to Enlarge

Click here for Raw Data

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.

Unmounted Retroreflectors
and
Mounted Retroreflectors

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 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.


Posted Comments:
bettina.schoke-sartisohn  (posted 2018-01-22 16:24:15.743)
Hi, I would like to know if it is possible to get the PS605, PS609, PS905 or PS909 AR coated on the legs for 350-700nm?
nbayconich  (posted 2018-01-24 10:26:42.0)
Thank you for contacting Thorlabs. Yes we can provide these prisms with AR coating for the legs. I will reach out to you directly with a quote.
deugarte  (posted 2016-03-08 18:35:34.59)
I would like to know if it is possible to get the PS913 (60 mm) with AR coated legs? I also see that the quality is only guaranteed over 70% of the surfaces, I would like to know how does the quality usually differ outside that 70%.
besembeson  (posted 2016-03-10 04:24:28.0)
Response from Bweh at Thorlabs USA: Yes it will be possible. I will contact you regarding a quotation and comment on the quality outside the 70% specification.
benjamin.judkewitz  (posted 2016-02-05 18:20:04.34)
Do you offer a B-coated version of the PS911 prism?
besembeson  (posted 2016-02-10 08:40:29.0)
Response from Bweh at Thorlabs USA: Yes this can be provided as a special item for now. We will contact you.
user  (posted 2015-05-29 09:40:38.673)
Hello, I bought a PS914H-A. Do you have data about the polarisation loss?
besembeson  (posted 2015-07-28 07:24:28.0)
Response from Bweh at Thorlabs USA: This will maintain horizontal and vertical polarizations when used in the Porro prism configuration. However, for a polarized input beam with a different orientation, the polarization is not maintained.
william.dai  (posted 2014-07-01 12:19:00.257)
What is the damage threshold for this prism's coating? My laser runs at 940nm, 7.5mmx10mm laser beam cross section at 1/e^2, maximum on-time of 10 seconds, max power of 50 W.
jlow  (posted 2014-08-07 08:45:51.0)
Response from Jeremy at Thorlabs: The damage threshold for the PS908L-B should be similar to our -B coated N-BK7 windows, which is 7.5 J/cm^2 (tested at 810 nm, 10 ns, 10 Hz, Ø0.144 mm).
jlow  (posted 2012-11-13 16:34:00.0)
Response from Jeremy at Thorlabs: If an appropriate prism with the right AR coating is used, then the loss should be <2% (estimated) when used as a 90° reflector.
cbrideau  (posted 2012-11-13 13:02:08.243)
Like scottie, I'd like to know what the estimated losses would be using the prism as a 90-degree reflector for the near UV and violet-blue? (350-450nm)
scottie730318  (posted 2012-10-28 22:26:55.98)
I would like to know if the PS908L-C is used to internally reflect 1060nm laser beams. What is the energy loss? Thank you.
tcohen  (posted 2012-06-21 13:54:00.0)
Response from Tim at Thorlabs: Thank you for your feedback. I have contacted you to discuss your application further. An important point to note for our mirror coatings is that they are not intended for internal reflection.
shaun.johnstone  (posted 2012-06-21 09:01:44.0)
Larger N-BK7 prisms (e.g. the 20-40mm range) with their hypotenuse AR coated, and their legs gold or silver coated, would be useful for making 2D MOTs with retroreflected beams (see e.g. http://dx.doi.org/10.1051/epjap:2006037)
user  (posted 2011-11-23 18:13:06.0)
A Response from Tyler at Thorlabs: The PS610 can be used with 213 nm light. Between surface reflections and internal absorption, the transmitted beam will losses will be approximately 12 percent for your laser. We will contact you with the transmission data, including surface reflections, for UV fused silica.
laser4u  (posted 2011-11-14 04:02:27.0)
I would like to know if the PS610 can be used to internally reflect 213nm laser beams. If yes, what is the energy loss? Our laser emits 213nm@2mJ/pulse@50Hz, beam diameter around 5mm. Thank you. Yiannis Theodoulou Laser Physicist Managing Director Laserlabs Ltd Limassol, Cyprus
Javier  (posted 2010-06-14 13:20:49.0)
Response from Javier at Thorlabs to djchen: at this time, we cannot offer custom right cangle prisms that meet your requirements. The angular tolerance for these prisms is specified as +/- 3 arcmin.
djchen  (posted 2010-06-14 10:45:56.0)
Is it possible to customize right angle prisms? My specifications are: 90 degree deviation < 2arcsec. Pyramidal error between the hypotenuse face and the corresponding edge < 2arcsec. Thank you.
apalmentieri  (posted 2010-02-18 11:24:25.0)
A response from Adam at Thorlabs to jcmgebh: The 90 degree edge has a chamfered edge: 0.2 mm X 0.2 mm. Therefore, this edge is not sharp and should not hurt people.
jcmgebh  (posted 2010-02-18 10:41:12.0)
I wanted to know how sharp the 90 degree edge is. Or is it blunt in order not to hurt people? Sincerely, Christof Gebhardt
apalmentieri  (posted 2010-01-06 14:55:47.0)
A response from Adam at Thorlabs to Yuri: It is possible to get a V coating for 308nm on the PS611. The specifications of our V-coatings are %R< .25% for AOI of 0 degrees. I will email you directly to get more information about the coating you are looking for.
yuri.kudryavtsev  (posted 2010-01-06 11:59:42.0)
Is it possible to have UV (308nm)AR coating on PS611?
apalmentieri  (posted 2009-07-15 17:39:25.0)
A response from Adam at Thorlabs: We currently do not offer the prism you reference as a standard stock item, but we may be able to cut our stock items down to size. I will check with our optics division and let you know via email.
funrunner13  (posted 2009-07-14 19:22:51.0)
Hi, Im looking for a right angled prism where the lengths of the legs (A and B) are not equal to the length of side h. I would like A=B=10 mm and h = 20 mm. Do you offer this? Thank you for your consideration, Leo Montilla
Laurie  (posted 2009-05-06 14:07:00.0)
Response from Laurie at Thorlabs to rene.schneider: We can provide our 5 mm prisms with AR-coated legs. Someone from our technical support staff will get in contact with you shortly to find out which AR coating you need (-A, -B, or -C) and the quantity that you require. Thanks for your interest in our right-angle prisms.
rene.schneider  (posted 2009-05-06 11:49:54.0)
Hello, im looking for a right angeled prism (UV fused silica) with AR-coated legs and a size of 5mm. Do you offer prisms with these specifications? Kind regards, Rene Schneider

UV Fused Silica Right-Angle Prisms, Uncoated (185 nm - 2.1 µm)

UV Fused Silica Transmission
Click to Enlarge
Click Here for Raw Data

Choose a UV Fused Silica Right-Angle Prism if your application would benefit from higher transmission in the UV or a lower coefficient of thermal expansion. UV-grade fused silica offers high transmission in the deep UV and exhibits virtually no laser-induced fluorescence (as measured at 193 nm), making it an ideal choice for applications from the UV to the near IR. For a given wavelength, UV fused silica also has a lower index of refraction than N-BK7. Please see the Graphs tab for a graph of index of refraction vs wavelength for UV fused silica.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
PS605 Support Documentation
PS605UV Fused Silica Right Angle Prism, Uncoated, 3 mm
$59.93
Today
PS609 Support Documentation
PS609UV Fused Silica Right-Angle Prism, Uncoated, 5 mm
$63.50
Today
PS610 Support Documentation
PS610UV Fused Silica Right-Angle Prism, Uncoated, 10 mm
$70.38
Today
PS614 Support Documentation
PS614Customer Inspired! UV Fused Silica Right-Angle Prism, Uncoated, 12.5 mm
$72.93
Today
PS615 Support Documentation
PS615Customer Inspired! UV Fused Silica Right-Angle Prism, Uncoated, 15 mm
$75.23
Today
PS608 Support Documentation
PS608UV Fused Silica Right-Angle Prism, Uncoated, 20 mm
$77.52
Today
PS611 Support Documentation
PS611UV Fused Silica Right-Angle Prism, Uncoated, 25 mm
$87.98
Today
PS612 Support Documentation
PS612UV Fused Silica Right-Angle Prism, Uncoated, 40 mm
$207.06
Today
PS613 Support Documentation
PS613UV Fused Silica Right-Angle Prism, Uncoated, 60 mm
$399.84
Today

N-BK7 Right-Angle Prisms, Uncoated (350 nm - 2 µm)

N-BK7 Transmission
Click to Enlarge
Click Here for Raw Data

Choose an N-BK7 Right-Angle Prism if the additional benefits of fused silica are not required. N-BK7 provides excellent transmittance in the visible and near infrared portions of the spectrum. Please see the Graphs tab for a graph of index of refraction vs wavelength for N-BK7. Additionally, N-BK7 is a viable choice for UV applications down to 350 nm. For applications that demand maximum transmission, please see our AR-coated N-BK7 prisms below.

Our PS911K Knife-Edge prism offers the same features as our standard N-BK7 right angle prisms but features an unbeveled, precision 90° edge between the two legs. This means that the clear aperture reaches across this surface, making this prism ideal for applications where a larger clear aperture is beneficial. It also offers enhanced surface flatness and quality; see the Specs tab for Details

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
PS905 Support Documentation
PS905N-BK7 Right-Angle Prism, Uncoated, 3 mm
$37.23
Today
PS909 Support Documentation
PS909N-BK7 Right-Angle Prism, Uncoated, 5 mm
$38.51
Today
PS910 Support Documentation
PS910N-BK7 Right-Angle Prism, Uncoated, 10 mm
$43.10
Today
PS914 Support Documentation
PS914Customer Inspired! N-BK7 Right-Angle Prism, Uncoated, 12.5 mm
$44.63
Today
PS915 Support Documentation
PS915Customer Inspired! N-BK7 Right-Angle Prism, Uncoated, 15 mm
$47.18
Lead Time
PS908 Support Documentation
PS908N-BK7 Right-Angle Prism, Uncoated, 20 mm
$48.71
Today
PS911 Support Documentation
PS911N-BK7 Right-Angle Prism, Uncoated, 25 mm
$55.59
Today
PS911K Support Documentation
PS911KCustomer Inspired! N-BK7 Knife-Edge Right-Angle Prism, Uncoated, 25 mm
$108.12
Today
PS912 Support Documentation
PS912N-BK7 Right-Angle Prism, Uncoated, 40 mm
$95.12
Today
PS913 Support Documentation
PS913N-BK7 Right-Angle Prism, Uncoated, 60 mm
$143.82
Today

CaF2 Right-Angle Prisms, Uncoated (180 nm - 8 µm)

Calcium Fluoride Transmission
Click to Enlarge

Transmission data is for two 25 mm right-angle prisms contacted into a cube. Click here for raw data.

Choose a CaF2 Right-Angle Prism for applications requiring high transmission in the 180 nm - 8 µm range. The material exhibits a low refractive index, varying from 1.35 to 1.51 within its usage range of 180 nm to 8.0 µm, as well as an extremely high laser damage threshold. Please see the Graphs tab for a graph of index of refraction vs wavelength for calcium fluoride. Calcium fluoride is also fairly chemically inert and offers superior hardness compared to its barium fluoride, magnesium fluoride, and lithium fluoride cousins.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
PS703 Support Documentation
PS703CaF2 Right-Angle Prism, Uncoated, 10 mm
$324.36
Today
PS706 Support Documentation
PS706Customer Inspired! CaF2 Right-Angle Prism, Uncoated, 12.5 mm
$376.38
3-5 Days
PS707 Support Documentation
PS707Customer Inspired! CaF2 Right-Angle Prism, Uncoated, 15 mm
$401.88
Today
PS704 Support Documentation
PS704CaF2 Right-Angle Prism, Uncoated, 25 mm
$506.94
Today

ZnSe Right-Angle Prisms, Uncoated (600 nm - 16 µm)

Zinc Selenide Prism Transmission
Click to Enlarge
Transmission data is for two 25 mm right-angle prisms contacted into a cube. Click here for raw data.

Zinc Selenide is ideal for use in the 600 nm - 16 µm range. It features low absorption (including in the red visible wavelength range) and high resistance to thermal shock. ZnSe is ideal for use in CO2 laser systems operating at 10.6 µm, including those with HeNe alignment lasers. Please see the Graphs tab for a graph of index of refraction vs wavelength for ZnSe.

When handling optics, one should always wear gloves. This is especially true when working with zinc selenide, as it is a hazardous material. For your safety, please follow all proper precautions, including wearing gloves when handling these prisms and thoroughly washing your hands afterward. Due to the low hardness of ZnSe, additional care should be taken to not damage these prisms. Click here to download a pdf of the MSDS for ZnSe.

Thorlabs will accept all ZnSe prisms back for proper disposal. Please contact Tech Support to make arrangements for this service.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
PS701 Support Documentation
PS701ZnSe Right-Angle Prism, Uncoated, 10 mm
$554.88
Today
PS702 Support Documentation
PS702ZnSe Right-Angle Prism, Uncoated, 25 mm
$938.40
Lead Time

N-BK7 Right-Angle Prisms, AR-Coated Hypotenuse

Choose an N-BK7 Right-Angle Prism with the appropriate AR Coating on the hypotenuse if you wish to use your prism as a retroreflector and you want to reduce surface reflections over the specified wavelength range of the coating.

A AR Coating
Click to Enlarge

Click Here for Raw Data
The blue shaded region indicates the specified 350 - 700 nm wavelength range for optimum performance.
B AR Coating
Click to Enlarge

Click Here for Raw Data
The blue shaded region indicates the specified 650 - 1050 nm wavelength range for optimum performance.
C AR Coating
Click to Enlarge

Click Here for Raw Data
The blue shaded region indicates the specified 1050 - 1620 nm wavelength range for optimum performance.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
PS910H-A Support Documentation
PS910H-AN-BK7 Right-Angle Prism, 10 mm, AR Coating on Hypotenuse: 350-700 nm
$70.13
Today
PS910H-B Support Documentation
PS910H-BN-BK7 Right-Angle Prism, 10 mm, AR Coating on Hypotenuse: 650-1050 nm
$70.13
Today
PS910H-C Support Documentation
PS910H-CN-BK7 Right-Angle Prism, 10 mm, AR Coating on Hypotenuse: 1050-1700 nm
$70.13
3-5 Days
PS914H-A Support Documentation
PS914H-ACustomer Inspired! N-BK7 Right-Angle Prism, 12.5 mm, AR Coating on Hyp.: 350-700 nm
$71.66
Today
PS914H-B Support Documentation
PS914H-BCustomer Inspired! N-BK7 Right-Angle Prism, 12.5 mm, AR Coating on Hyp.: 650-1050 nm
$71.66
Today
PS914H-C Support Documentation
PS914H-CCustomer Inspired! N-BK7 Right-Angle Prism, 12.5 mm, AR Coating on Hyp.: 1050-1700 nm
$71.66
Today
PS915H-A Support Documentation
PS915H-ACustomer Inspired! N-BK7 Right-Angle Prism, 15 mm, AR Coating on Hyp.: 350-700 nm
$74.21
Today
PS915H-B Support Documentation
PS915H-BCustomer Inspired! N-BK7 Right-Angle Prism, 15 mm, AR Coating on Hyp.: 650-1050 nm
$74.21
Today
PS915H-C Support Documentation
PS915H-CCustomer Inspired! N-BK7 Right-Angle Prism, 15 mm, AR Coating on Hyp.: 1050-1700 nm
$74.21
Today
PS908H-A Support Documentation
PS908H-ACustomer Inspired! N-BK7 Right-Angle Prism, 20 mm, AR Coating on Hypotenuse: 350-700 nm
$75.99
3-5 Days
PS908H-B Support Documentation
PS908H-BCustomer Inspired! N-BK7 Right-Angle Prism, 20 mm, AR Coating on Hypotenuse: 650-1050 nm
$75.99
Today
PS908H-C Support Documentation
PS908H-CCustomer Inspired! N-BK7 Right-Angle Prism, 20 mm, AR Coating on Hypotenuse: 1050-1700 nm
$75.99
Today

N-BK7 Right-Angle Prisms, AR-Coated Legs

Choose an N-BK7 Right-Angle Prism with the appropriate AR Coating on the legs if you wish to use your prism as a 90 degree reflector and you want to reduce surface reflections over the specified wavelength range of the coating.

A AR Coating
Click to Enlarge

Click Here for Raw Data
The blue shaded region indicates the specified 350 - 700 nm wavelength range for optimum performance.
B AR Coating
Click to Enlarge

Click Here for Raw Data
The blue shaded region indicates the specified 650 - 1050 nm wavelength range for optimum performance.
C AR Coating
Click to Enlarge

Click Here for Raw Data
The blue shaded region indicates the specified 1050 - 1620 nm wavelength range for optimum performance.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
PS910L-A Support Documentation
PS910L-AN-BK7 Right-Angle Prism, 10 mm, AR Coating on Legs: 350-700 nm
$83.39
Today
PS910L-B Support Documentation
PS910L-BN-BK7 Right-Angle Prism, 10 mm, AR Coating on Legs: 650-1050 nm
$83.39
Today
PS910L-C Support Documentation
PS910L-CN-BK7 Right-Angle Prism, 10 mm, AR Coating on Legs: 1050-1700 nm
$83.39
Today
PS914L-A Support Documentation
PS914L-ACustomer Inspired! N-BK7 Right-Angle Prism, 12.5 mm, AR Coating on Legs: 350-700 nm
$85.17
Today
PS914L-B Support Documentation
PS914L-BCustomer Inspired! N-BK7 Right-Angle Prism, 12.5 mm, AR Coating on Legs: 650-1050 nm
$85.17
Today
PS914L-C Support Documentation
PS914L-CCustomer Inspired! N-BK7 Right-Angle Prism, 12.5 mm, AR Coating on Legs: 1050-1700 nm
$85.17
Today
PS915L-A Support Documentation
PS915L-ACustomer Inspired! N-BK7 Right-Angle Prism, 15 mm, AR Coating on Legs: 350-700 nm
$87.72
Today
PS915L-B Support Documentation
PS915L-BCustomer Inspired! N-BK7 Right-Angle Prism, 15 mm, AR Coating on Legs: 650-1050 nm
$87.72
3-5 Days
PS915L-C Support Documentation
PS915L-CCustomer Inspired! N-BK7 Right-Angle Prism, 15 mm, AR Coating on Legs: 1050-1700 nm
$87.72
Today
PS908L-A Support Documentation
PS908L-ACustomer Inspired! N-BK7 Right-Angle Prism, 20 mm, AR Coating on Legs: 350-700 nm
$89.51
3-5 Days
PS908L-B Support Documentation
PS908L-BCustomer Inspired! N-BK7 Right-Angle Prism, 20 mm, AR Coating on Legs: 650-1050 nm
$89.51
Today
PS908L-C Support Documentation
PS908L-CCustomer Inspired! N-BK7 Right-Angle Prism, 20 mm, AR Coating on Legs: 1050-1700 nm
$89.51
Today
Log In  |   My Account  |   Contact Us  |   Careers  |   Privacy Policy  |   Home  |   FAQ  |   Site Index
Regional Websites: West Coast US | Europe | Asia | China | Japan
Copyright 1999-2018 Thorlabs, Inc.
Sales: 1-973-300-3000
Technical Support: 1-973-300-3000


High Quality Thorlabs Logo 1000px:Save this Image