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Products Home / Optomechanical Components / Irises / Apertures / Irises / Post-Mountable Iris DiaphragmsPost-Mountable Iris Diaphragms
- Continuously Variable Irises with Sizes Range from Ø5 mm to Ø75 mm
- Black Anodized Aluminum Housing to Limit Reflections
- Black and Stainless Steel Blades Available
ID12
ID25
ID25Z
IDA25-P5
Pack of 5 with Threaded Stud
ID5MS
Mini-Series Iris
Enlarged to Show
Detail
ID25SS
Enlarged to Show
Stainless Steel Leaves
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Shown is a comparison between minimum aperture sizes on our standard, stainless steel, and zero-aperture irises.
| Iris Selection Guide |
|---|
| Post-Mountable Irises |
| Unmounted Irises |
| SM-Threaded Lever-Actuated Irises |
| SM-Threaded Ring-Actuated Irises |
| Cage System Irises |
Features
- Continuously Variable
- Single Irises Include Housing and Mounting Post
- Select Irises Available in Packs of 5 without 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.
With the exception of the Mini-Series Mounted Iris Diaphragm (ID5MS, ID5MS/M), which is mounted on a Ø6 mm post for compatibility with our Mini-Series line, and our five-pack standard iris diaphragms, all iris diaphragms listed below are mounted on a removable 3" (75 mm) long Ø1/2" post. Irises without a post are available as a special by contacting Tech Support. Irises with item # prefix IDA are sold in packs of five with a bottom-located 8-32 (M4) setscrew but no mounting post.
In addition to the post-mountable irises sold on this page, Thorlabs also offers SM-threaded Lever-Actuated Irises and
Ring-Actuated Irises. We also offer Cage System Irises for use with 30 mm and 60 mm cage systems.
| Posted Comments: | |
Bruno Schmidt
(posted 2021-02-15 23:12:11.733) When you say the stainless steel leaves are for high power options, just how high are we talking? Do you have any data? YLohia
(posted 2021-02-16 11:48:11.0) Thank you for contacting Thorlabs. Unfortunately, we don't have a Damage Threshold spec for our iris diaphragms. It’s hard to specify the laser damage threshold in this case because it depends on several parameters such as wavelength, iris opening, exposure duration, etc. The maximum temperature that the blades can be heated would be around 250°C for the regular irises and around 400°C for the stainless steel versions. Marshall Scott
(posted 2019-06-19 11:15:04.483) I’m with Daaf. A version with diffusive or even fluorescent leafs would be amazing. Especially since the aperture is typically recessed into the mount where I can’t get a card. YLohia
(posted 2019-06-19 12:36:48.0) Hello, thank you for your feedback. I have posted your request to our internal product engineering forum for further consideration as a future product. campbellr
(posted 2019-02-19 11:15:34.293) The irises that are sold without a post are described as having a stud. Are the studs removable, leaving a tapped hole, so that I could mount them on a custom bracket using a screw?
Thanks,
Rob mmcclure
(posted 2019-02-20 07:46:32.0) Hello, thank you for contacting us. The studs featured on the IDAxx iris diaphragms are not removable, as the stud is designed to enable post mounting as well as to hold the iris firmly in place inside the aluminum housing. dan.reynolds
(posted 2017-03-17 15:42:56.133) I recently bought a ID75Z/M only to find that, somewhat annoyingly, the iris diaphragm system was too thick to act as an adjustable pinhole in the focal plane of my optical system. Before purchasing the ID36/M, could you tell me how thick its closed diaphragm is? It also might be worth mentioning the thickness of the zero-aperture irises somewhere on this page swick
(posted 2017-03-21 04:54:14.0) This is a response from Sebastian at Thorlabs. Thank you for the feedback.
The Zero Aperture Iris Diaphragms are not designed to be used as an adjustable pinhole. When the aperture gets smaller, it also becomes slightly elliptical due to the design of the iris.
Please note ID36/M is not a Zero Aperture Diaphragm, however, the thickness when diameter of the aperture is minimal (Ø1.3mm) is 0.41mm. srtweezer
(posted 2016-09-20 22:08:30.743) It would be useful to have irises whose height are exactly 0.5" to use as a reference for setting up the height of the laser beam. swick
(posted 2016-09-21 04:11:31.0) This is a response from Sebastian at Thorlabs: Thank you very much for your feedback.
We will evaluate if we can offer this as a special item.
I will contact you directly regarding customized irises. cacao23
(posted 2016-05-23 18:13:49.713) Dear,
I have a question.
Is that iris makes back beam?? except for center hole. shallwig
(posted 2016-05-25 03:36:14.0) This is a response from Stefan at Thorlabs. Thank you for your inquiry. The housing of the iris diaphragms are made from anodized aluminum to limit reflections. The leaves are made either from black spring steel or from Stainless Steel with different reflection properties. I have contacted you directly to check your application in detail. popei
(posted 2016-01-27 11:50:59.34) The height of the post supplied with the iris is too large for our needs. It would be useful if one could purchase the iris without the post. shallwig
(posted 2016-01-28 03:31:18.0) This is a response from Stefan at Thorlabs. Thank you very much for your inquiry. We offer these iris without post as special. I will contact you directly to check for which Iris you need a quote and if you have any further questions. daaf.sandkuijl
(posted 2015-09-01 06:50:25.75) It would be great to have an iris with matte white/light gray leaves instead of shiny and dark gray, for alignment purposes. In fact if that were available it would be the only type of iris I would use. shallwig
(posted 2015-09-02 05:18:04.0) This is a response from Stefan at Thorlabs. Thank you very much for your inquiry. At the moment we can only offer our post mounted Iris diaphragms with black spring steel leaves and stainless steel leaves. I will contact you directly to check if we can offer a special with different leaves. sfeldman
(posted 2014-01-06 13:52:09.18) The solid works model has a 2" post, while the overview says its a 3" post. Which is correct? And is it possible to get a 2" post instead of a 3"? tschalk
(posted 2014-01-07 07:37:15.0) This is a response from Thomas at Thorlabs. Thank you very much for your inquiry. The solid work files should contain a 3" post and we will modify the files. Thank you for pointing this out. The posts can be easily removed from the iris and, if an additional 2" post (part number TR2) is purchased, this one can be attached. This would be the easiest way to get an iris with 2" post. jlow
(posted 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. kevlarp
(posted 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. bdada
(posted 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. sshosseini
(posted 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 apalmentieri
(posted 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. noam
(posted 2009-12-09 10:19:34.0) can you please send me a solid part of ID15? |
Zoom| Item # | Aperturea | # of Leaves | O.D. / Thickness |
|---|---|---|---|
| ID8 (ID8/M) | Ø0.7 to Ø8 mm | 8 | 0.84" / 0.24" (21.4 mm / 6.0 mm) |
| ID12 (ID12/M) | Ø0.8 to Ø12 mm | 10 | 1.04" / 0.23" (26.4 mm / 5.8 mm) |
| ID15 (ID15/M) | Ø0.8 to Ø15 mm | 12 | 1.20" / 0.26" (30.6 mm / 6.5 mm) |
| ID20 (ID20/M) | Ø0.8 to Ø20 mm | 12 | 1.44" / 0.28" (36.6 mm / 7.0 mm) |
| ID25 (ID25/M) | Ø1 to Ø25 mm | 14 | 1.72" / 0.26" (43.7 mm / 6.6 mm) |
| ID36 (ID36/M) | Ø1.3 to Ø36 mm | 16 | 2.24" / 0.28 " (56.9 mm / 7.1 mm) |
| ID50 (ID50/M) | Ø2 to Ø50 mm | 16 | 3.12" / 0.35" (79.4 mm / 8.9 mm) |
Zoom| Item # | Aperturea | # of Leaves | O.D. / Thickness |
|---|---|---|---|
| IDA12-P5 (IDA12/M-P5) | Ø0.8 to Ø12 mm | 10 | 1.04" / 0.23" (26.4 mm / 5.8 mm) |
| IDA15-P5 (IDA15/M-P5) | Ø0.8 to Ø15 mm | 12 | 1.20" / 0.26" (30.6 mm / 6.5 mm) |
| IDA20-P5 (IDA20/M-P5) | Ø0.8 to Ø20 mm | 12 | 1.44" / 0.28" (36.6 mm / 7.2 mm) |
| IDA25-P5 (IDA25/M-P5) | Ø1 to Ø25 mm | 14 | 1.72" / 0.26" (43.7 mm / 6.6 mm) |
- Lever-Actuated, Continuously Variable Iris
- Black Spring Steel Leaves
- Black-Anodized Aluminum Housing
- Bottom-Located 8-32 (M4) Threaded Stud for Post Mounting
- Packs of 5
These irises feature an 8-32 (M4) threaded stud and do not include a TR3(/M) post. |
Zoom| Item # | Aperturea | # of Leaves | O.D. / Thickness |
|---|---|---|---|
| ID12Z (ID12Z/M) | 0 to Ø12 mm | 10 | 1.09" / 0.32" (27.6 mm / 8 mm) |
| ID25Z (ID25Z/M) | 0 to Ø25 mm | 14 | 1.76" / 0.32" (44.6 mm / 8 mm) |
| ID37Z (ID37Z/M) | 0 to Ø37 mm | 16 | 2.56" / 0.41" (65.0 / 10.5 mm) |
| ID50Z (ID50Z/M) | 0 to Ø50 mm | 16 | 3.35" / 0.49" (85.0 / 12.5 mm) |
| ID75Z (ID75Z/M) | 0 to Ø75 mm | 20 | 4.53" / 0.51" (115 / 13 mm) |
- Zero Minimum Aperture
- Lever-Actuated, Continuously Variable Iris
- Black Spring Steel Leaves
- Black-Anodized Aluminum Housing
- Dual Layer Leaf Design Reduces Aperture to Zero When Closed
- Mounted on 3" (75 mm) Long Post, TR3 (TR75/M)
When the lever is in the closed position, the iris aperture is completely closed with a zero diameter aperture, unlike a single layer iris, which has a non-zero diameter aperture when the lever is in the closed position. Our zero-aperture design achieves a completely closed aperture by utilizing two sets of steel leaves mounted in two adjacent planes. Please note that as the aperture gets smaller, it also becomes slightly elliptical due to the design of the iris.
Zoom| Item # | Aperturea | # of Leaves | O.D. / Thickness |
|---|---|---|---|
| ID12SS (ID2SS/M) | Ø0.9 to Ø12 mm | 10 | 1.04" / 0.23" (26.4 mm / 5.8 mm) |
| ID25SS (ID25SS/M) | Ø0.9 to Ø25 mm | 14 | 1.72" / 0.26" (43.7 mm / 6.6 mm) |
- Stainless Steel Leaves for High Power Applications
- Lever-Actuated, Continuously Variable Iris
- Black-Anodized Aluminum Housing
- Mounted on 3" (75 mm) Long Post, TR3 (TR75/M)
Please note that these irises are fabricated from magnetic stainless steel. Due to its hardness, magnetic stainless steel offers a longer lifetime than typical nonmagnetic stainless steel.
Zoom| Item # | Aperture | # of Leaves | O.D./Thickness |
|---|---|---|---|
| ID5MS (ID5MS/M) | Ø1.0 to Ø5 mm | 6 | 0.44" / 0.19" (11.2 mm / 4.8 mm) |
- Lever-Actuated, Continuously Variable Iris
- Black Spring Steel Leaves
- Black-Anodized Aluminum Housing
- Mounted on Ø6 mm, 1.5" (38 mm) Long Post
This product is designed for use with our Ø6 mm Mini-Series posts and is optimal for applications in which space is limited. The Mini-Series product line offers all of the essential building blocks for miniature and OEM-level optomechanical assemblies. For more information about the ID5MS(/M), please the full web presentation.
Additional Irises
 Post-Mountable Irises |
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