Right-Angle Brackets with a Clear Aperture

  • Right-Angle Bracket with SM-Threaded Clear Apertures
  • Generous Array of 1/4"-20 (M6) Tapped Holes
  • Rigid One-Piece Construction

SM2-Threaded Hole

SM1-Threaded Hole


Two SM1-



SM1 Lens Tube



Application Idea

The DET30B2 Ge Photodetector with an SM1 Lens Tube and a Mounted Achromatic Doublet Both Mounted on the CAM1

Related Items

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CAM1 and Cage Structure
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View Imperial Product List
Item #QtyDescription
Imperial Product List
CAM11Right-Angle Bracket for SM1 Lens Tubes, Imperial Taps
LCP02130 mm to 60 mm Cage Plate Adapter, 8-32 Tap
ER4-P41Cage Assembly Rod, 4" Long, Ø6 mm, 4 Pack
View Metric Product List
Item #QtyDescription
Metric Product List
CAM1/M1Right-Angle Bracket for SM1 Lens Tubes, Metric Taps
LCP02/M130 mm to 60 mm Cage Plate Adapter, M4 Tap
ER4-P41Cage Assembly Rod, 4" Long, Ø6 mm, 4 Pack
A 60 mm cage system is attached to the front of the CAM1 right-angle bracket. This is being adapted to a 30 mm cage system using the LCP02 30 mm to 60 mm cage plate adapter.


  • Compatible with Many Thorlabs Optomechanical Devices
  • Compact Structure Suitable for Mounting Lens Tubes and Cage Structures in Confined Spaces
  • Threaded 1/4"-20 (M6) Holes Provide Numerous Mounting Options

Thorlabs' Clear Aperture Right-Angle Brackets provide a threaded clear aperture on both mounting surfaces, allowing them to be positioned directly within a beam path. The CAM1(/M) bracket offers two SM1 (1.035"-40) threaded mounting apertures, while the CAM2(/M) bracket offers one SM2 (2.035"-40) and one SM1-threaded aperture. These clear apertures are directly compatible with SM-threaded components such as our Lens Tubes. Tapped 4-40 holes on one surface are compatible with Thorlabs' 60 mm Cage Structures, as shown in the figure to the right. This rigid structure provides the strength and stability required to support large cantilever loads like lens tubes containing several optics.

Each bracket surface has an array of 1/4"-20 (M6) and 6-32 (M4) tapped holes. One surface also has slots for 1/4"-20 (M6) cap screws for convenient mounting to an optical table. The angled support has two #8 (M4) counterbores and one 1/4"-20 (M6) tapped hole for even greater versatility.

Please Note: The SM-threaded holes for previous versions of these brackets were offset by 0.06" (1.5 mm). This offset was corrected for the CAM1/M as of December 12, 2014, the CAM2/M as of February 10, 2015, and the CAM1 and CAM2 as of April 23, 2015.

Posted Comments:
Antreas Theodosiou  (posted 2023-06-07 15:01:52.13)
I am looking for a lens mount for the olympus rms10x
cdolbashian  (posted 2023-06-12 11:16:54.0)
Thank you for reaching out to us with this inquiry. The SM1A3 would adapt your RMS threads to SM1 threading, which is our standard optical threading. Once you have such an adapter you can use any of our threaded 1" optomech (SM1) to mount this objective.
Oleg Grachev  (posted 2020-10-18 18:36:39.82)
I was looking for an angle plate to mount KCB1E mirror mount and couldn't find one. Please advise
YLohia  (posted 2020-10-19 03:12:55.0)
Thank you for contacting Thorlabs. Our right angle adapters can be used for this application: https://www.thorlabs.us/newgrouppage9.cfm?objectgroup_ID=223. For example, the AB90F would be a good option.
randall.dannemann  (posted 2014-05-07 14:17:13.477)
This is the worst product ever, whoever thought of it should be cained! While it looks like a right angle bracket with two threaded holes that look at the same point in space 90º from each other, it is not. It might captivate ones attention as a great product for use with a prism and tube optics, it is a great way to have a frustrating morning. A big warning on the purchase page to let anyone know that the product is fairly useless for any optics involving a right angle application would be nice.
jlow  (posted 2014-05-08 11:36:40.0)
Response from Jeremy at Thorlabs: Thank you for contacting us regarding the CAM1 you received. This was an oversight on our part and we will be updating the hole positions. I will contact you directly and send you a replacement part.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
CAM1 Support Documentation
CAM1Right-Angle Bracket for SM1 Lens Tubes, Imperial Taps
CAM2 Support Documentation
CAM2Right-Angle Bracket for SM1 and SM2 Lens Tubes, Imperial Taps
+1 Qty Docs Part Number - Metric Price Available
CAM1/M Support Documentation
CAM1/MRight-Angle Bracket for SM1 Lens Tubes, Metric Taps
CAM2/M Support Documentation
CAM2/MRight-Angle Bracket for SM1 and SM2 Lens Tubes, Metric Taps