Post-Mountable Viewing Screens

  • 75 mm or 150 mm Square Plastic Viewing Screens
  • 8-32 (M4) Tapped Hole for Post Mounting
  • Front and Back Surface Finishes are Ideal for Observing Interference Fringes, Spectra, and Images


8-32 (M4) Tapped Hole

Application Idea

EDU-VS1 Screen Mounted
on a TR3 Ø1/2" Post, PH3
Post Holder, and BA1 Base


Related Items

Please Wait
Broadband Spectrum on Viewing Screen
Click to Enlarge

Spectrum of the OSL2 Halogen Light Source, created using a PS858 Dispersing Prism. The screen is mounted on a Ø1/2" Post.
Broadband Spectrum on Viewing Screen
Click to Enlarge

Interference pattern showing laser speckle on the EDU-VS1 Screen, created using the Michelson Interferometer in our EDU-BT1/M Bomb Tester Demonstration Kit


  • Two Sizes are Available:
    • 75 mm (2.95") Square
    • 150 mm (5.91") Square
  • 3.0 mm (0.12") Thick
  • White Polystyrene Construction
  • 8-32 (M4) Tapped Metal Thread Insert for Post Mounting

Thorlabs' Post-Mountable Polystyrene Viewing Screens are ideal for observing interference patterns, spectra, and images. The screens are available in small (75 mm x 75 mm) or large (150 mm x 150 mm) sizes. Both screens are 3.0 mm (0.12") thick. One side has a smooth matte finish, while the other has a slightly textured surface. These surface finishes were chosen to provide a diffuse, uniform reflection and to optimize the appearance of interference patterns and other images. Their white plastic construction allows bright images and beams to be observed even through the back of the screens. Each screen includes one crosshair sticker that can be used for beam alignment.

These screens are equipped with an 8-32 (M4) tapped metal thread insert for post mounting; this feature allows them to be easily integrated into optomechanical setups.

Please note that the screens should not be used as a beam block or as any type of laser safety device. Their plastic construction results in a low damage threshold and makes them slightly translucent.

Posted Comments:
Frank Müller  (posted 2022-10-17 09:12:15.42)
I need a larger screen, maybe 300x300mm². Can you deliver ? Please quote. Thanks, Frank Müller
soswald  (posted 2022-10-17 09:35:27.0)
Dear Frank, thank you for your feedback. We can offer custom-sized versions of these screens, 300 mm x 300 mm should be possible. I have reached out to you directly to discuss your application in more detail.
chris e  (posted 2022-07-21 10:45:26.133)
Hi, do you have surface roughness data?
fmortaheb  (posted 2022-07-26 05:17:34.0)
Thank you very much for contacting us. Unfortunately, we don't have any information on the surface roughness on hand. I'll contact you directly to discuss it further.
jase jase  (posted 2022-07-05 15:35:59.823)
I would like to view interference patterns in the mid-IR (λ = 3-5 µm), using a mid-IR camera of course. This screen should do the job, right? Thanks.
fmortaheb  (posted 2022-07-11 04:58:31.0)
Thank you very much for contacting Thorlabs. We haven't tested them for that range. I'll contact you directly to discuss your application.
user  (posted 2020-08-15 15:02:54.087)
what is the LIDT in W/cm^2 and J/cm^2 10ns 1-pulse thanks
soswald  (posted 2020-08-17 09:39:03.0)
Unfortunately we have not specified a damage threshold for the viewing screens. However, the plastic construction most likely results in a very low damage threshold and makes them slightly translucent, so we do not recommend direct exposure of these screens to high power laser beams.
melanie  (posted 2017-03-20 11:34:09.713)
What is the minimum incident intensity for a red laser beam to be visible when reflecting from this surface ?
jlow  (posted 2017-03-29 04:49:41.0)
Response from Jeremy at Thorlabs: This is highly dependent on the person viewing the screen and the room condition. It's not something that we can specify.
jay.mathews  (posted 2015-04-14 17:34:14.727)
For the EDU-VS1, it would be nice if one side had a giant bullseye on it. It would be useful for counting fringes, and it would allow you to make large beam or spot sizes for light sources.
besembeson  (posted 2015-04-22 01:44:01.0)
Response from Bweh at Thorlabs USA: This is a good idea. I will follow-up by email to look into the possibility of a special quotation.
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Post-Mountable Viewing Screens

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
EDU-VS2 Support Documentation
EDU-VS2Post-Mountable White Polystyrene Viewing Screen, 2.95" x 2.95"
EDU-VS1 Support Documentation
EDU-VS1Post-Mountable White Polystyrene Viewing Screen, 5.91" x 5.91"
+1 Qty Docs Part Number - Metric Price Available
EDU-VS2/M Support Documentation
EDU-VS2/MPost-Mountable White Polystyrene Viewing Screen, 75 mm x 75 mm
EDU-VS1/M Support Documentation
EDU-VS1/MPost-Mountable White Polystyrene Viewing Screen, 150 mm x 150 mm
7-10 Days