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

Features

Choose from Three Versions:

Standard Black Spring Steel Leaves
Stainless Steel Leaves for High Power Applications
Zero-Aperture

Continuously Variable Iris Diaphragms
These Models Have No Mounting Holes

These lever-actuated, continuously variable iris diaphragms are designed to provide smooth operation over many thousands of cycles. These irises do not have any mounting holes and cannot be attached directly to a post. Thorlabs also offers Post-Mounted Iris, as well as SM-threaded Lever-Actuated and Ring-Actuated irises.

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Posted Comments:

Poster: jlow

Posted Date: 2012-09-28 09:50:00.0

Response from Jeremy at Thorlabs: The thread size for the actuator lever on the D12S is M1.7x0.35mm.

Poster: cjimenez

Posted Date: 2012-09-27 20:07:15.0

what is the thread size for the actuator lever on model D12S?

Poster: bdada

Posted Date: 2011-12-13 13:36:00.0

Response from Buki at Thorlabs: Thank you for your feedback. The iris diaphragms you asked about are our unmounted diaphragms, which are best for OEM applications that require custom mounting options. These unmounted diaphragms do not have mounting holes and cannot be mounted directly to a post. To mount the iris, please consider our post mounted irises: http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=206 The post mounted version of the D37SZ you asked about is the ID37Z Zero Aperture, Post-Mounted Iris Diaphragm, Ø37.0 mm Max Aperture http://www.thorlabs.com/thorProduct.cfm?partNumber=ID37Z For future reference, please note that we also provide SMx threaded irises: http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=1479 If you have recently purchased the unmounted iris diaphragm and want to exchange it with one of the iris diaphragms that can be mounted, please contact TechSupport@thorlabs.com for further assistance.

Poster: raphael.cohen3

Posted Date: 2011-12-11 06:11:00.0

we have a number of these 1/ is there a way to attach them to something? 2/ how can we use them without attaching them to anything? thanks

Poster: tor

Posted Date: 2010-11-29 14:50:19.0

Response from Tor at Thorlabs: The housing is CW614N brass, and the leaves are C100S+QT stainless steel.

Poster: a.matveev

Posted Date: 2010-11-26 14:43:44.0

Which material is the frame of the diaphragm made of?

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Adjustable Diaphragm alignment guide diaphragm iris iris diaphragm iris diaphragms lever iris oem iris pin holes pinholes unmounted variable aperture variable iris

Item #

Aperture*

Size (Outer Diameter)

Thickness

D5S

Ø0.7 mm - Ø5 mm (Ø0.03" - Ø0.20")

0.39" (10.0 mm)

0.18" (4.5 mm)

D8S

Ø0.7 mm - Ø8 mm (Ø0.03" - Ø0.32")

0.58" (14.8 mm)

0.18" (4.6 mm)

D12S

Ø0.8 mm - Ø12.0 mm (Ø0.03" - Ø0.47")

0.78" (19.8 mm)

0.20" (5.0 mm)

D15S

Ø0.8 mm - Ø15 mm (Ø0.03" - Ø0.59")

0.95" (24.0 mm)

0.20" (5.0 mm)

D20S

Ø0.8 mm - Ø20 mm (Ø0.03" - Ø0.79")

1.18" (30.0 mm)

0.22" (5.5 mm)

D25S

Ø0.8 mm - Ø25 mm (Ø0.04" - Ø0.985")

1.455" (37.0 mm)

0.215" (5.5 mm)

D36S

Ø1.2 mm - Ø36 mm (Ø0.05" - Ø1.42")

1.97" (50.0 mm)

0.23" (6.0 mm)

D50S

Ø2 mm - Ø50 mm (Ø0.08" - Ø1.97")

2.75" (70.0 mm)

0.30" (7.5 mm)

Item #

Aperture*

Size (Outer Diameter)

Thickness

D12SS

Ø0.8 mm - Ø12 mm (Ø0.03" - Ø0.5")

0.78" (19.8 mm)

0.20" (5.0 mm)

D25SS

Ø0.8 mm - Ø25 mm (Ø0.04" - Ø0.985")

1.46" (37.0 mm)

0.22" (5.5 mm)

Item #

Aperture*

Size (Outer Diameter)

Thickness

D12SZ

Ø0 mm - Ø12 mm (Ø0" - Ø0.5")

0.827" (21.0 mm)

0.24" (6.1 mm)

D25SZ

Ø0 mm - Ø25 mm (Ø0" - Ø0.985")

1.50" (38.0 mm)

0.24" (6.0 mm)

D37SZ

Ø0 mm - Ø37 mm (0" - 1.46")

2.13" (54.0 mm)

0.30" (7.7 mm)

D50SZ

Ø0 mm - Ø50 mm (Ø0" - 1.97")

2.84" (72.0 mm)

0.35" (9.0 mm)

D75SZ

Ø0 mm - Ø75 mm (0" - 2.95")

4.02" (102.0 mm)

0.37" (9.5 mm)

View All »Matching Part Numbers

Unmounted Iris Diaphragms

Features

These irises do not have any mounting holes and cannot be attached directly to a post.

These irises do not have any mounting holes and cannot be attached directly to a post.

These irises do not have any mounting holes and cannot be attached directly to a post.