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

Click to Enlarge
Comparison of Minimum Aperture Sizes

Features

Continuously Variable
Includes Housing and Mounting Post
Black Anodized Aluminum Housing Limits Reflection
Custom Sizes Available
Unmounted Iris Diaphragms Also Available

These lever-actuated, continuously variable iris diaphragms are designed to provide smooth operation over many thousands of cycles. The individual steel leaves pivot within a black-anodized aluminum housing and are mounted on a stainless steel post. With the exception of the Mini-Series Mounted Iris Diaphragm (ID5MS, ID5MS/M), which is mounted on a Ø6 mm post that is compatible with our Mini-Series line, all iris diaphragms listed below are mounted on a removable 3" (75 mm) long Ø1/2" post. Versions without the post are available as a special by contacting tech support.

SM-Threaded Irises with SMR Post-Mounting Adapters
In addition to the post-mounted irises sold on this page, our Threaded Lever-Actuated Irises and Threaded Ring-Activated Irises can be used along with the corresponding SMR series Threaded Post Mounts to construct a post-mounted lever-actuated iris where the lever can be repositioned, or a post-mounted ring-actuated iris, respectively.

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Posted Comments:

Poster: jlow

Posted Date: 2013-01-24 11:56:53.857

Response from Jeremy at Thorlabs: Thank you very much for your feedback. We will look into this possibility. In the meantime, we could offer the iris without the optical post. You could then put the iris on the graduated post. Please contact our Tech Support group at techsupport@thorlabs.com if you would like to get a quote on the iris without a post.

Poster: kevlarp

Posted Date: 2013-01-23 16:31:21.23

It would be very helpful if mounted irises were available with your graduated posts (TR3E, for example). I often need irises to be at the exact same height, and having the graduated marks on the post that comes with the iris is helpful.

Poster: bdada

Posted Date: 2011-09-26 20:12:00.0

Response from Buki at Thorlabs: Thank you for your feedback. I have passed on your suggestion to our design team. In the meantime, please review our selection of alignment disks to see if any may be suitable for your application. http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=3201 I have contacted you directly to assist you in selecting one of our alignment disks that may work for you.

Poster: sshosseini

Posted Date: 2011-09-23 04:14:07.0

It would be very helpful if you could make a product that can clip to the back of the irises in white color and a cross in the center of the iris. I use papers and tapes to do so for alignment purposes at dark but I also need to take the paper out and put it back in several times to check the alignment and every time I have to put it back it takes some time and I need to have more light which ruins my dark vision. ~Sona

Poster: apalmentieri

Posted Date: 2009-12-15 21:46:43.0

A response from Adam at Thorlabs: We can supply these solid parts and will send you an email with these files attached.

Poster: noam

Posted Date: 2009-12-09 10:19:34.0

can you please send me a solid part of ID15?

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adjustable aperture adjustable diaphragm adjustable iris alignment guide diaphragm dual leaf iris iris iris diaphragm Iris Diaphragms lever iris mini series iris mounted mounted diaphragm mounted iris mounted zero aperture iris pin holes pinholes post mounted iris stainless steel variable aperture variable iris zero aperture zero aperture diaphragm zero aperture iris zero iris

Item #

Aperture

# Leaves

O.D. / Thickness

ID8 (ID8/M)

Ø0.7 to Ø8 mm

0.84" / 0.24" (21.4 mm / 6.0 mm)

ID12 (ID12/M)

Ø0.8 to Ø12 mm

1.04" / 0.23" (26.4 mm / 5.8 mm)

ID15 (ID15/M)

Ø0.8 to Ø15 mm

1.20" / 0.26" (30.6 mm / 6.5 mm)

ID20 (ID20/M)

Ø0.8 to Ø20 mm

1.44" / 0.28" (36.6 mm / 7.0 mm)

ID25 (ID25/M)

Ø1 to Ø25 mm

1.72" / 0.26" (43.7 mm / 6.6 mm)

ID36 (ID36/M)

Ø1.3 to Ø36 mm

2.24" / 0.28 " (56.9 mm / 7.1 mm)

ID50 (ID50/M)

Ø2 to Ø50 mm

3.12" / 0.35" (79.4 mm / 8.9 mm)

Item #

Aperture

# Leaves

O.D. / Thickness

ID12Z (ID12Z/M)

0 to Ø12 mm

1.09" / 0.32" (27.6 mm / 8 mm)

ID25Z (ID25Z/M)

0 to Ø25 mm

1.76" / 0.32" (44.6 mm / 8 mm)

ID37Z (ID37Z/M)

0 to Ø37 mm

2.56" / 0.41" (65.0 / 10.5 mm)

ID50Z (ID50Z/M)

0 to Ø50 mm

3.35" / 0.49" (85.0 / 12.5 mm)

ID75Z (ID75Z/M)

0 to Ø75 mm

4.53" / 0.51" (115 / 13 mm)

Item #

Aperture

# Leaves

O.D. / Thickness

ID12SS (ID2SS/M)

Ø0.9 to Ø12 mm

1.04" / 0.23" (26.4 mm / 5.8 mm)

ID25SS (ID25SS/M)

Ø0.9 to Ø25 mm

1.72" / 0.26 " (43.7 mm / 6.6 mm)

Item #

Aperture

# Leaves

O.D./Thickness

ID5MS (ID5MS/M)

Ø1.0 to Ø5 mm

0.44" / 0.19" (11.2 mm / 4.8 mm)

View All »Matching Part Numbers

Post-Mounted Iris Diaphragms

Features