Iris Diaphragms Without Mounting Holes

Overview
Feedback

Iris Selection Guide
Post-Mountable Irises
Unmounted Irises
SM-Threaded Lever-Actuated Irises
SM-Threaded Ring-Actuated Irises
Cage System 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
Select Irises Sold in Packs of 5

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-Mountable irises, as well as SM-threaded Lever-Actuated and Ring-Actuated irises. In addition, we offer Cage System Irises for use with 30 mm and 60 mm cage systems. Select irises are also available in packs of five.

Posted Comments:

user (posted 2020-01-31 06:03:10.787)

The CAD file and drawing for this are incorrect. More specifically - the adjustment lever is about 3/4mm longer than stated and a different shape

MKiess (posted 2020-02-03 11:42:07.0)

This is a response from Michael at Thorlabs. Thank you very much for this feedback. We will check this immediately and adjust the CAD drawings accordingly.

user (posted 2016-02-11 14:27:51.693)

Do the black spring steel leaves in the D25S shed any debris during extended operation? Is the black a coating or a metal treatment that would be less likely to wear off?

shallwig (posted 2016-02-12 06:04:38.0)

This is a response from Stefan at Thorlabs. Thank you very much for your inquiry. The “black” of the leaves comes from “Bluing” the steel which is a passivation process in which steel is partially protected against rust. Any debris during extended operation are not known so far. As you left no contact data could you please contact us at Europe@thorlabs.com for further questions.

matz.liebel (posted 2015-04-10 16:36:18.06)

We bought four of these irisis (before the warning that they can't be mounted was implemented) and I am still wondering what the point of this product is/was? "Unmountable" rather than "Unmounted" iris would certainly be a better product description. Extremely disappointing

lmorgus (posted 2015-04-10 12:13:23.0)

A response from Laurie at Thorlabs to Matz: We apologize for the inconvenience our unmounted irises have caused you. They are often used by system integrators who are looking for a minimalistic design that they can either glue into position or machine a custom mount for. Your point is well taken that Unmountable might be a better descriptor than unmounted. We have updated the verbiage on our website in an effort to make this clearer. Thorlabs does sell some iris diaphragms that can be post mounted. We would be happy to exchange the ones you purchased for ones that incorporate a mounting feature.

christian.Matzdorf (posted 2015-03-25 11:07:30.78)

Why does the unmounted iris diafragma´s has no mounting hole? What can I do with this things if I am not able to mount them?! So you force your Customer to order post mounted ones with a post which is not wanted each time.

shallwig (posted 2015-03-26 04:29:29.0)

This is a response from Stefan at Thorlabs. Thank you very much for your inquiry. These post mounted irises have a special setscrew which is glued into the iris. On request we also offer the irises without the post. Regarding your question what you can do with the unmounted iris diaphragms. We have several mounts which can be used for holding these iris diaphragms, for example adjustable lens mounts like these http://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=54 or self-centering mounts http://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=1488 can be used. If you are more looking for a possibility to mount the iris on our SM1/2 tubes the ring-actuated Threaded Iris Diaphragms are an option. http://www.thorlabs.com/newgrouppage9.cfm?objectgroup_ID=1479 I will contact you directly to discuss your needs in more detail.

amilner (posted 2015-01-09 12:31:29.53)

Hello, by mistake I have bought unmounted irises D20S instead of pre-mounted (recent sales order TS1294450). Can I buy mounting housing for them separately? Can you please give me the corresponding part number. Thank you. Alexander Milner.

shallwig (posted 2015-01-12 03:22:51.0)

This is a response from Stefan at Thorlabs. Thank you very much for you inquiry. Unfortunately the unmounted Irises of this series like the D20S do not have any mounting holes and cannot be attached directly to a post. We will contact you directly to exchange them by the pre-mounted Irises you were originally looking for.

james.parker (posted 2014-04-11 14:11:59.133)

Could you please tell me the centration tolerance of the minimum-sized aperture relative to the housing, the dimaensional tolerance of the housing and the depth of the iris plane within the housing for D8S. thank you.

shallwig (posted 2014-04-16 09:02:36.0)

This is a response from Stefan at Thorlabs. Thank you very much for your inquiry. Unfortunately, the centration tolerance is not specified but 0.25mm from the geometrical center is a reasonable estimate. The dimensional tolerances are as follows: Outer diameter: +0.00 / - 0.05 mm Thickness: +/- 0.1 mm Depth of iris plane: 1.1 mm +/- 0.1 mm, measured from the front.

scampbel (posted 2013-09-16 08:03:19.513)

What is the power handling of these irises? What is "High Power" for the stainless steel? 1W or 1000W? Thanks-

jlow (posted 2013-09-19 09:38:00.0)

Response from Jeremy at Thorlabs: It’s hard to specify the laser damage threshold 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 iris and around 400°C for the stainless steel version.

mduquette (posted 2013-07-02 10:26:23.8)

It would be extremely helpful if the travel of the arm in degrees were listed for all iris models.

cdaly (posted 2013-07-02 16:34:00.0)

Response from Chris at Thorlabs: Thank you for your feedback. If it is necessary to know the size of the aperture, we do have a graduated version, SM1D12C which has markings which denote the diameter of the opening for a given position.

jlow (posted 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.

cjimenez (posted 2012-09-27 20:07:15.0)

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

bdada (posted 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.

raphael.cohen3 (posted 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

tor (posted 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.

a.matveev (posted 2010-11-26 14:43:44.0)

Which material is the frame of the diaphragm made of?