SM Series Angled Optic Mounts


  • 3° or 10° Angled Mounts Reduce Etalon Effects on Plano-Plano Optics
  • Eliminate Back Reflections
  • Ø1/2", Ø1", & Ø2" Mounts Available

SM1L03T

Ø1" Optic Mount with
10° Angle

SM1L03T3

SM1L20

SMR1

LM1XY

SM2L03T

Ø2" Optic Mount with
10° Angle

SM05L03T3

Ø1/2" Optic Mount with 3° Angle

An SM1L03T3 mount is attached to a Ø1" lens tube in line with a translation mount which centers the next optic on the displaced beam.

Application Idea

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Features

  • Mount Ø1/2", Ø1", or Ø2" Optics at 3° or 10° Angle
  • Reduce Back Reflections and Etalon Effects in Plano-Plano Optics
  • SM05 (0.535"-40), SM1 (1.035"-40), or SM2 (2.035"-40) Threaded
  • Retaining Ring and Locking Nut Included

These Angled Optic Mounts are designed to minimize back reflections occurring from a Ø1/2", Ø1", or Ø2" optical window by mounting it at a fixed 3° or 10° angle. These mounting angles also help reduce the etalon effects present in optics with parallel surfaces. The SM threading on the rear side allows the mounts to be easily coupled to our Ø1/2", Ø1", or Ø2" lens tubes. Using our thread adapters, the mounts can also be added to a Ø1.5" or Ø3" lens tube setup.

The etalon effect occurs when the front and back surfaces of a window or filter create Fresnel reflections that interfere with the original beam. Tilting a window with an angled optic mount reduces the etalon effect, and the output from the window or filter contains less interference, giving a smoother, more accurate baseline of the source. 

Since the beam exiting the angled window is displaced as a function of the thickness of the window and its material, Thorlabs recommends using the angled optic mount together with an XY Translating Mount such as the LM05XY, LM1XY, or LM2XY to align the subsequent optic.


Posted Comments:
user  (posted 2023-03-21 10:21:27.997)
These are very useful! It would be helpful to have SM2 and SM05 versions of these. As also mentioned, various angles too (3, 5, 10 degrees).
jdelia  (posted 2023-03-21 11:36:16.0)
Thank you for contacting Thorlabs and for leaving this valuable feedback! I am forwarding your request over to our engineers via our internal feedback forum.
Maxime Bertrand  (posted 2023-01-05 17:31:27.247)
Very interesting product indeed but I also think a smaller angle would be more convenient in most applications. I would definitely be using a 3-5° version.
jdelia  (posted 2023-01-06 08:50:46.0)
Thank you for contacting Thorlabs. We appreciate you providing this valuable feedback. While this is not something we would currently be able to offer as a stock part, I could certainly pass this along to our engineers through our internal suggestion forum for further review.
Jeff Jarboe  (posted 2020-01-28 10:37:23.803)
This is a interesting product and I would be interested in using these in a few applications but the angle is higher then desired. Has there been any interest or desire from industry to make a 2 or 5 degree version?
llamb  (posted 2020-01-28 04:31:34.0)
Thank you for your feedback. There have been a few requests over the years for smaller angles, though not a large volume. I have added your idea into our internal product forum for further review.
user  (posted 2020-01-15 17:00:17.17)
I second the 1/2 " version, although I like the 10 degree tilt. It would be good if it is placed in a such a way so that the optical axis goes through the center of the lens (with some nominal thickness, maybe 5 mm).
YLohia  (posted 2020-01-16 09:01:26.0)
Thank you for your feedback. I have posted your suggestion on our internal engineering forum for further discussion regarding offering a 1/2" version of this item as a product. That being said, the SM1L03T can be used with 1/2" optics using the SM1A6T adapter since the front of the mount is SM1-threaded.
tor  (posted 2011-01-05 19:56:57.0)
Response from Tor at Thorlabs to Boris: Thank you for your request. I will contact you directly to determine whether we can provide a custom part for your application.
btadjikov  (posted 2011-01-04 14:45:27.0)
Hi, I would like to have 1/2" version of SM series angled optics mount. Also, 10deg seems too big for most applications, 3-5 deg is enough. Regards, Boris Tadjikov, engineer Pranalytica, Inc. btadjikov@pranalytica.com

SM05 Series Angled Mounts

  • Mount Ø1/2" Optics at a 3° or 10° Angle
  • Reduce Back Reflections and Etalon Effects in Plano-Plano Optics
  • SM05 (0.535"-40) Threaded
  • SM05RR Retaining Ring and SM05NT1 Locking Nut Included

These low-profile angled optic mounts are designed to minimize back reflections and reduce etalon effects occurring from Ø1/2" optical windows by mounting them at a fixed 3° or 10° angle. The SM05 (0.535"-40) threading on the rear side allows the mounts to be easily coupled to our Ø1/2" lens tubes. The SM05L03T3 and SM05L03TA mounts accommodate optics up to 6 mm and 3 mm thick, respectively, making them compatible with many of our flat windows

Since the beam exiting the angled window is displaced as a function of the thickness of the window and its material, Thorlabs recommends using the angled optic mounts together with an XY Translating Mount such as the LM05XY in order to align subsequent optics to the displaced beam.

Item # Optic
Diameter
Angle Max Optic
Thickness
Clear Aperture Included Retaining Ring Included
Locking Nut
Suggested Spanner Wrench
SM05L03T3 Ø1/2" 0.24" (6.0 mm) Ø0.40" (Ø10.2 mm) SM05RR SM05NT1 SPW603 for Retaining Ring and
SPW502 for Locking Nut
SM05L03TA 10° 0.12" (3.0 mm) Ø0.36" (Ø9.2 mm)
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
SM05L03T3 Support Documentation
SM05L03T3Customer Inspired! SM05 Series 3° Angled Optic Mount
$38.81
Today
SM05L03TA Support Documentation
SM05L03TACustomer Inspired! SM05 Series 10° Angled Optic Mount
$38.81
Today

SM1 Series Angled Mounts

  • Mount Ø1" Optics at a 3° or 10° Angle
  • Reduce Back Reflections and Etalon Effects in Plano-Plano Optics
  • SM1 (1.035"-40) Threaded
  • SM1RR Retaining Ring and SM1NT1 Locking Nut Included

These low-profile angled optic mounts are designed to minimize back reflections and reduce etalon effects occurring from Ø1" optical windows by mounting them at a fixed 3° or 10° angle. The SM1 (1.035"-40) threading on the rear side allows the mounts to be easily coupled to our Ø1" lens tubes. These mounts accommodate optics up to 6 mm thick, making them compatible with many of our flat windows.

Since the beam exiting the angled window is displaced as a function of the thickness of the window and its material, Thorlabs recommends using the angled optic mount together with an XY Translating Mount such as the LM1XY in order to align subsequent optics to the displaced beam.

Item # Optic
Diameter
Angle Max Optic
Thickness
Clear Aperture Included Retaining Ring Included
Locking Nut
Suggested Spanner Wrench
SM1L03T3 Ø1" 0.24" (6.0 mm) Ø0.87" (Ø22.0 mm) SM1RR SM1NT1 SPW602 for Retaining Ring and
 SPW502 for Locking Nut
SM1L03T 10° Ø0.78" (Ø19.8 mm)
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
SM1L03T3 Support Documentation
SM1L03T3Customer Inspired! SM1 Series 3° Angled Optic Mount
$58.21
Today
SM1L03T Support Documentation
SM1L03TSM1 Series 10° Angled Optic Mount
$58.21
7-10 Days

SM2 Series Angled Mounts

  • Mount Ø2" Optics at a 3° or 10° Angle
  • Reduce Back Reflections and Etalon Effects in Plano-Plano Optics
  • SM2 (2.035"-40) Threaded
  • SM2RR Retaining Ring and SM2NT1 Locking Nut Included

These low-profile angled optic mounts are designed to minimize back reflections and reduce etalon effects occurring from Ø2" optical windows by mounting them at a fixed 3° or 10° angle. The SM2 (2.035"-40) threading on the rear side allows the mounts to be easily coupled to our Ø2" lens tubes. These mounts accommodate optics up to 12 mm thick, making them compatible with many of our flat windows.

Since the beam exiting the angled window is displaced as a function of the thickness of the window and its material, Thorlabs recommends using the angled optic mount together with an XY Translating Mount such as the LM2XY in order to align subsequent optics to the displaced beam.

Item # Optic
Diameter
Angle Max Optic
Thickness
Clear Aperture Included Retaining Ring Included
Locking Nut
Suggested Spanner Wrench
SM2L03T3 Ø2" 0.47" (12.0 mm) Ø1.83" (Ø46.6 mm) SM2RR SM2NT1 SPW604 for Retaining Ring and
SPW503 for Locking Nut
SM2L03T 10° Ø1.66" (Ø42.2 mm)
.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
SM2L03T3 Support Documentation
SM2L03T3Customer Inspired! SM2 Series 3° Angled Optic Mount
$87.32
Today
SM2L03T Support Documentation
SM2L03TCustomer Inspired! SM2 Series 10° Angled Optic Mount
$87.32
Today