Thorlabs - Ring-Activated Threaded Iris Diaphragms

Iris Selection Guide
Post-Mounted Irises
Unmounted Irises
Threaded Lever-Activated Irises
Threaded Ring-Activated Irises

Ring-Activated Irises
Our ring-activated irises are perfect for tight spaces where the lever on our standard lever-actuated irises or threaded lever-actuated irises doesn't easily fit. Ring-activated irises are especially beneficial within our cage assemblies, preventing interference between a lever actuator and the surrounding cage rods. The ring actuator provides an intuitive, smooth feel; the aperture size can be locked via a setscrew.

Item #	SM05D5D	SM1D12D	SM2D25D	SM1D12C
Thread Standard	SM05 (0.535"-40)	SM1 (1.035"-40)	SM2 (2.035"-40)	SM1 (1.035"-40)
Aperture (Min)	Ø0.7 mm (Ø0.03")	Ø0.8 mm (Ø0.03")	Ø1 mm (Ø0.04")	Ø1 mm (Ø0.04")
Aperture (Max)	Ø5 mm (Ø0.20")	Ø12.0 mm (Ø0.47")	Ø25 mm (Ø0.98")	Ø12 mm (Ø0.47")

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Posted Comments:

Poster: bdada

Posted Date: 2012-06-05 19:04:00.0

Response from Buki at Thorlabs to kaccie: Thank you for participating in our feedback forum. I am checking with our production team to see if this modification will negatively impact the performance of the iris. Please note that any modifications will void the warranty on the item.I have contacted you directly to continue this conversation.

Poster: kaccie

Posted Date: 2012-06-04 06:20:38.0

Regarding the SM1D12C. Would anything strange happen (in terms of proper movement of the blades) if I cut off the back 3 mm of the unit? I ask because the unit is just a bit too thick for my application, and I really don't need the SM1 threads sticking out in the back. Thanks Kaccie

Poster: jjurado

Posted Date: 2011-06-16 11:13:00.0

Response from Javier at Thorlabs to k1w05: Thank you very much for contacting us. The distance from aperture plane to the outer face (with the external thread) is 4.14 mm. Keep in mind that your measured value of 4.54 mm is still within the mechanical tolerance range (+/-0.50 mm) of this dimension. Please contact us at techsupport@thorlabs.com if you have any further questions.

Poster: k1w05

Posted Date: 2011-06-12 09:33:47.0

I have a iris of SM1D12C. I want to design a structure to mount this iris, can you tell me the accurate distance between the apeture plane and one outer face of SM1D12C. The number I measured is about 4.54mm. I hope your accurate number.

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Ring-Activated Threaded Iris Diaphragms