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Post-Mounted Iris Diaphragms


  • Continuously Variable Iris
  • Sizes Range from Ø5 mm to Ø75 mm
  • Black Anodized Aluminum Housing to Limit Reflections

ID12

ID25

ID25Z

ID25Z

Enlarged to
Show Detail

ID5MS

Mini-Series Iris
Enlarged to Show
Detail

ID25SS

Enlarged to Show
Leaves

New Stainless Steel Leaves
For High Power Applications

Related Items

Aperture Comparison
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.

In addition to the post-mounted irises sold on this page, our Threaded Lever-Actuated Irises and Threaded Ring-Actuated 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. In addition, we offer Cage System Irises for use with 30 mm and 60 mm cage systems.

Click the Support Documentation icon document icon or Part Number below to view the available support documentation
Part NumberProduct Description
ID12 Support Documentation ID12:Mounted Standard Iris, 12.0 mm Max. Aperture
ID12/M Support Documentation ID12/M:Mounted Standard Iris, 12 mm Max. Aperture, Metric
ID12SS Support Documentation ID12SS:Mounted Stainless Steel Iris, 12.0mm Max. Aperture
ID12SS/M Support Documentation ID12SS/M:Mounted Stainless Steel Iris, 12.0mm Max. Aperture, Metric
ID12Z Support Documentation ID12Z:Mounted Zero Aperture Iris, 12.0mm Max. Aperture
ID12Z/M Support Documentation ID12Z/M:Mounted Zero Aperture Iris, 12.0mm Max. Aperture, Metric
ID15 Support Documentation ID15:Mounted Standard Iris, 15.0 mm Max. Aperture
ID15/M Support Documentation ID15/M:Mounted Standard Iris, 15 mm Max. Aperture, Metric
ID20 Support Documentation ID20:Mounted Standard Iris, 20.0 mm Max. Aperture
ID20/M Support Documentation ID20/M:Mounted Standard Iris, 20 mm Max. Aperture, Metric
ID25 Support Documentation ID25:Mounted Standard Iris, 25.0 mm Max. Aperture
ID25/M Support Documentation ID25/M:Mounted Standard Iris, 25 mm Max. Aperture, Metric
ID25SS Support Documentation ID25SS:Mounted Stainless Steel Iris, 25.0mm Max. Aperture
ID25SS/M Support Documentation ID25SS/M:Mounted Stainless Steel Iris, 25.0mm Max. Aperture, Metric
ID25Z Support Documentation ID25Z:Mounted Zero Aperture Iris, 25.0mm Max. Aperture
Part NumberProduct Description
ID25Z/M Support Documentation ID25Z/M:Mounted Zero Aperture Iris, 25.0mm Max. Aperture, Metric
ID36 Support Documentation ID36:Mounted Standard Iris, 36.0 mm Max. Aperture
ID36/M Support Documentation ID36/M:Mounted Standard Iris, 36 mm Max. Aperture, Metric
ID37Z Support Documentation ID37Z:Mounted Zero Aperture Iris, 37.0mm Max. Aperture
ID37Z/M Support Documentation ID37Z/M:Mounted Zero Aperture Iris, 37.0mm Max. Aperture, Metric
ID50 Support Documentation ID50:Mounted Standard Iris, 50.0 mm Max. Aperture
ID50/M Support Documentation ID50/M:Mounted Standard Iris, 50 mm Max. Aperture, Metric
ID50Z Support Documentation ID50Z:Mounted Zero Aperture Iris, 50.0mm Max. Aperture
ID50Z/M Support Documentation ID50Z/M:Mounted Zero Aperture Iris, 50.0mm Max. Aperture, Metric
ID5MS Support Documentation ID5MS:Mini-Series Post-Mounted Iris, Ø5.0 mm Max Aperture (Ø6 mm Post, 1.5" Long)
ID5MS/M Support Documentation ID5MS/M:Mini-Series Post-Mounted Iris, Ø5.0 mm Max Aperture (Ø6 mm Post, 38 mm Long)
ID75Z Support Documentation ID75Z:Mounted Zero Aperture Iris, 75.0mm Max. Aperture
ID75Z/M Support Documentation ID75Z/M:Mounted Zero Aperture Iris, 75.0mm Max. Aperture, Metric
ID8 Support Documentation ID8:Mounted Standard Iris, 8.0 mm Max. Aperture
ID8/M Support Documentation ID8/M:Mounted Standard Iris, 8.0 mm Max. Aperture, Metric

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Posted Comments:
Poster:sfeldman
Posted Date: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"?
Poster:tschalk
Posted Date: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.
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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Post-Mounted Iris Diaphragms

Item #Aperture# LeavesO.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)
  • Lever-Actuated, Continuously Variable Iris
  • Black Spring Steel Leaves
  • Black-Anodized Aluminum Housing
  • Mounted on 3" (75 mm) Long Post,
    TR3 (TR75/M)
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
ID8 Support Documentation
ID8Mounted Standard Iris, 8.0 mm Max. Aperture
$46.10
Today
ID12 Support Documentation
ID12Mounted Standard Iris, 12.0 mm Max. Aperture
$45.80
Today
ID15 Support Documentation
ID15Mounted Standard Iris, 15.0 mm Max. Aperture
$45.60
Today
ID20 Support Documentation
ID20Mounted Standard Iris, 20.0 mm Max. Aperture
$47.10
Today
ID25 Support Documentation
ID25Mounted Standard Iris, 25.0 mm Max. Aperture
$55.10
Today
ID36 Support Documentation
ID36Mounted Standard Iris, 36.0 mm Max. Aperture
$68.70
Today
ID50 Support Documentation
ID50Mounted Standard Iris, 50.0 mm Max. Aperture
$117.00
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
ID8/M Support Documentation
ID8/MMounted Standard Iris, 8.0 mm Max. Aperture, Metric
$46.10
Today
ID12/M Support Documentation
ID12/MMounted Standard Iris, 12 mm Max. Aperture, Metric
$45.80
Today
ID15/M Support Documentation
ID15/MMounted Standard Iris, 15 mm Max. Aperture, Metric
$45.60
Today
ID20/M Support Documentation
ID20/MMounted Standard Iris, 20 mm Max. Aperture, Metric
$47.10
Today
ID25/M Support Documentation
ID25/MMounted Standard Iris, 25 mm Max. Aperture, Metric
$55.10
Today
ID36/M Support Documentation
ID36/MMounted Standard Iris, 36 mm Max. Aperture, Metric
$68.70
Today
ID50/M Support Documentation
ID50/MMounted Standard Iris, 50 mm Max. Aperture, Metric
$117.00
Today

Zero Aperture, Post-Mounted Iris Diaphragms

Item #Aperture# LeavesO.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
  • 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. Please note that as the aperture gets smaller, it also becomes slightly elliptical due to the design of the iris.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
ID12Z Support Documentation
ID12ZMounted Zero Aperture Iris, 12.0mm Max. Aperture
$60.30
Today
ID25Z Support Documentation
ID25ZMounted Zero Aperture Iris, 25.0mm Max. Aperture
$68.70
Today
ID37Z Support Documentation
ID37ZMounted Zero Aperture Iris, 37.0mm Max. Aperture
$116.00
Today
ID50Z Support Documentation
ID50ZMounted Zero Aperture Iris, 50.0mm Max. Aperture
$159.00
Today
ID75Z Support Documentation
ID75ZMounted Zero Aperture Iris, 75.0mm Max. Aperture
$222.00
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
ID12Z/M Support Documentation
ID12Z/MMounted Zero Aperture Iris, 12.0mm Max. Aperture, Metric
$60.30
Today
ID25Z/M Support Documentation
ID25Z/MMounted Zero Aperture Iris, 25.0mm Max. Aperture, Metric
$68.70
Today
ID37Z/M Support Documentation
ID37Z/MMounted Zero Aperture Iris, 37.0mm Max. Aperture, Metric
$116.00
Today
ID50Z/M Support Documentation
ID50Z/MMounted Zero Aperture Iris, 50.0mm Max. Aperture, Metric
$159.00
Today
ID75Z/M Support Documentation
ID75Z/MMounted Zero Aperture Iris, 75.0mm Max. Aperture, Metric
$222.00
Today

Stainless Steel, Post-Mounted Iris Diaphragms

Item #Aperture# LeavesO.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.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
ID12SS Support Documentation
ID12SSMounted Stainless Steel Iris, 12.0mm Max. Aperture
$49.00
Today
ID25SS Support Documentation
ID25SSMounted Stainless Steel Iris, 25.0mm Max. Aperture
$55.80
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
ID12SS/M Support Documentation
ID12SS/MMounted Stainless Steel Iris, 12.0mm Max. Aperture, Metric
$49.00
Today
ID25SS/M Support Documentation
ID25SS/MMounted Stainless Steel Iris, 25.0mm Max. Aperture, Metric
$55.80
Today

Mini-Series, Post-Mounted Iris Diaphragms

Item #Aperture# LeavesO.D./Thickness
ID5MS (ID5MS/M)Ø1.0 to Ø5 mm60.44" / 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 to be compatible with our Mini-Series Posts components 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.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
ID5MS Support Documentation
ID5MSMini-Series Post-Mounted Iris, Ø5.0 mm Max Aperture (Ø6 mm Post, 1.5" Long)
$67.90
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
ID5MS/M Support Documentation
ID5MS/MMini-Series Post-Mounted Iris, Ø5.0 mm Max Aperture (Ø6 mm Post, 38 mm Long)
$67.90
Today
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