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Products HomeLever-Actuated SM-Threaded Irises
- Integrates Directly with Our Lens Tubes and Cage Systems
- Standard Lever Activation
- Zero-Aperture and Stainless Steel Models Available
SM1D25
Internally
SM1-Threaded Iris
SM2D25
SM2-Threaded Iris
SM1D12SS
SM1-Threaded
Stainless Steel Iris
SM1D12
SM1-Threaded Iris
SM1L03
Lens Tube
SM1RC
Lens Tube
Slip Ring
Application Idea
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| Iris Selection Guide |
|---|
| Post-Mountable Irises |
| Unmounted Irises |
| SM-Threaded Lever-Actuated Irises |
| SM-Threaded Ring-Actuated Irises |
| Cage System Irises |
Thorlabs offers lever-activated irises with compatible lens tube threading for use with our lens tube systems, SM-threaded mounts, and cage systems.
In addition, Thorlabs offers a line of Post-Mountable Irises, SM-Threaded Ring-Actuated Irises, Unmounted Irises, and Cage System Irises as well as mounted pinholes and slits.
| Item # | Compatible Lens Tube | Minimum Aperture | Maximum Aperture |
|---|---|---|---|
| SM05D5 | Ø1/2" (SM05) | Ø0.7 mm (Ø0.03") | Ø5 mm (Ø0.20") |
| SM1D12 | Ø1" (SM1) | Ø0.8 mm (Ø0.03") | Ø12 mm (Ø0.47") |
| SM1D25 | Ø1" (SM1) | Ø0.8 mm (Ø0.03") | Ø25 mm (Ø0.98") |
| SM2D25 | Ø2" (SM2) | Ø0.8 mm (Ø0.03") | Ø25 mm (Ø0.98") |
| SM3D50 | Ø3" (SM3) | Ø2 mm (Ø0.08") | Ø50 mm (Ø1.97") |
| SM1D12SZ | Ø1" (SM1) | Zero | Ø12 mm (Ø0.47") |
| SM1D12SS | Ø1" (SM1) | Ø0.9 mm (Ø0.03") | Ø12 mm (Ø0.47") |
| Posted Comments: | |
Rick Young
(posted 2019-06-20 18:36:19.34) Where is the 'plane' of the iris/aperture itself referenced to whatever (one side)? None of the drawings I looked at specify this measurement ...! YLohia
(posted 2019-06-21 11:27:56.0) Hello, thank you for contacting Thorlabs. The distance between the surface of the externally SM2 threaded side and the iris plane is 4.75mm for the SM2D25. This information can be found in the Solidworks model. user
(posted 2019-04-04 05:41:59.82) Hi,
We recently purchased two of these irises from you. We don't seem to be able to use the locking screw to stop the lever from moving once it's in the position we want. We tried a variety of allen keys and the one that best fit was 0.03in/0.75mm. We tried looking at the CAD drawing but all it says is "locking screw". Could you tell me what the correct allen key should be?
Thanks,
Chris mmcclure
(posted 2019-04-04 08:12:07.0) Hello, thank you for your question. The setscrew located on the housing of each iris is not a locking mechanism. Rather, this setscrew helps to hold the internal aperture mechanism within the mounting ring. We will provide this information on the webpage presentation to avoid future confusion. user
(posted 2017-03-22 13:50:34.42) Irises with max apertures of 75mm and 100mm would be very useful. swick
(posted 2017-03-23 05:20:25.0) This is a response from Sebastian at Thorlabs. Thank you for the inquiry.
We offer irises with max. aperture 75mm. The item name would be ID75Z:
https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=206
At the time we do not offer an iris with aperture of 100mm as standard item.
I would like to check if we can offer a customized version for you. As you did not left any contact details, please contact techsupport@thorlabs.com syim
(posted 2016-05-13 16:02:46.317) Hello,
It would be helpful that you have zero aperture iris of 25 mm max aperture diameter. Could I get a custom item? shallwig
(posted 2016-05-13 08:34:48.0) This is a response from Stefan at Thorlabs. Thank you very much for your inquiry, we offer zero aperture post mounted Iris diaphragms with 25mm max aperture (ID25Z) and our standard Iris diaphragms without mounting holes are also available with 25mm max aperture, the part number is D25SZ. I have contacted you directly to check if one of these is suitable for you. ludoangot
(posted 2016-02-17 09:30:00.037) Hello, it would have been good to explicitly specify that for zero aperture irises, the dual leaf design actually means two aperture planes. At least I wasn't aware that your dual leaf design implied there's 2 apertures and they are not coplanar. Such a design is not desired when the location of the aperture plane is critical such as in some telecentric systems. jlow
(posted 2016-02-25 11:08:41.0) Response from Jeremy at Thorlabs: Thank you for the feedback. We will make this information clearer on the website. grovyle
(posted 2015-04-14 13:14:44.963) I have a SM1T1 stuck on a SM1D12.
I want to submerge the whole thing in WD40 and sonicate it. Afterward, rinse it with an organic solvent.
I need to know if the iris is only metal or it has plastic parts that can be damaged this way.
I tried to lose it mechanically buy can make more pressure without risking destroying the iris or the tube.
Do you have any suggestions on how to separate them. I'm deciding between keep trying or just leave the tube permanently stuck on the iris. shallwig
(posted 2015-04-22 05:37:15.0) This is a response from Stefan at Thorlabs. Thank you very much for your inquiry. The iris lever is made from stainless steel, the fins are made from hoop steel while the housing is made from anodized aluminum, there are no plastic parts used. There is also grease attached to guarantee smooth aperture settings. Normally it should be possible to lose the SM1D12 from the SM1T1 mechanically, I will contact you directly to troubleshoot this problem in more detail. tomerg
(posted 2014-05-18 10:12:42.683) Can you please provide the mechanical tolerance on the external diameter of the SM1D25 iris? its nominal diameter is given (40.6mm) in the drawing, but for my application the tolerance is required as well. Thanks. cdaly
(posted 2014-05-22 10:55:35.0) Response from Chris at Thorlabs: Thank you for your inquiry. I will contact you directly with this value. tomerg
(posted 2014-04-07 08:24:56.213) Good morning,
Regarding the iris SM1D25: is there an option to lock the aperture at a certain opening after initial adjustment?
Thanks, Tomer. cdaly
(posted 2014-04-08 07:44:53.0) Response from Chris at Thorlabs: Thank you for your inquiry. The SM1D25 aperture does not have a locking mechanism. There is a set screw on the bottom, which looks like it may be, but after inspection of the part, it is clear this is used only for assembly purposes, holding the internal aperture mechanism itself within the mounting ring at a fixed angle. christophe.yamahata
(posted 2013-12-10 10:33:35.167) Would it be possible to order iris diaphragms SM05D5 without the Thorlabs marking? The arrow symbol is very useful, but Thorlabs's logo is not desired for our commercial product. jlow
(posted 2013-12-18 08:47:05.0) Jeremy Low: Response from Jeremy at Thorlabs: We could definitely do this as a custom for you. I will get in contact with you directly on getting a quote set up. technicalmarketing
(posted 2008-07-28 22:58:46.0) Hallo, We will work on new drawings of the Iris Diaphragms right now. For SM1D12SZ the distance between the leaves is 2.35 mm. The distance from the mounting surface on the side with the external threads to the first set of leaves is 3 mm. Inge@thorlabs.com blecompte
(posted 2008-07-23 12:46:33.0) Do you have a 3d solid model of the SM1D12SZ yet? Or can you tell me the location of the iris leaves relative to the mounting surface? |
Zoom
- Aperture Controlled by a Lever
- Black Spring Steel Leaves
Our threaded lever-activated iris diaphragms are continuously variable irises compatible with our SM05-, SM1-, SM2-, and SM3-threaded lens tubes (Ø1/2", Ø1", Ø2",and Ø3" ). The individual black spring steel leaves pivot within the outer ring of the iris and are designed to last several thousand cycles. These irises feature an engraved arrow on the housing which indicates the direction the lever must be moved to close the aperture.
Our SM05D5, SM1D12, SM2D25, and SM3D50 irises have internal SM threading on one side and external SM threading on the other side (see drawings to the right). Our SM1D25 iris has internal SM1 (1.035"-40) threading on both sides of the housing (see drawing to the right) as well as a full Ø25 mm aperture. For the minimum and maximum apertures of all of these irises, please see the table in the Overview tab above.
The setscrews on the housing of each iris retains the internal aperture mechanism within the mounting ring and should not be adjusted.
Zoom- Zero Minimum Aperture
- Black Spring Steel Leaves
- Ø12 mm Maximum Aperture
- SM1 Threaded
The dual leaf design of the SM1D12SZ allows the iris to be continuously varied from the maximum aperture diameter of 12 mm to completely closed (zero aperture). Our zero-aperture design achieves a completely closed aperture by utilizing two sets of steel leaves mounted in two adjacent planes. This iris also has internal SM1 (1.035"-40) threading on one side and external SM1 threading on the other, which makes the iris easy to integrate into an SM1 Lens Tube System. The iris leaves are made from black spring steel and the lever-activated diaphragm is designed to provide smooth operation for several thousand cycles. These irises feature an engraved arrow on the housing which indicates the direction the lever must be moved to close the aperture. As the aperture gets smaller, it also becomes slightly elliptical due to the design of the iris.
The setscrew on the housing of the iris retains the internal aperture mechanism within the mounting ring and should not be adjusted.
Zoom- Stainless Steel Leaves for High Power Applications
- SM1-Threaded
- Ø12.0 mm Maximum Aperture
The stainless steel leaves of the SM1D12SS iris allow it to be used in higher power applications than traditional spring steel irises. The aperture can be continuously varied from the maximum aperture diameter of 12 mm to a minimum aperture diameter of 0.9 mm. This iris also has internal SM1 (1.035"-40) threading on one side and external SM1 threading on the other, which makes the iris easy to integrate into an SM1 Lens Tube System. The lever-activated diaphragm is designed to provide smooth operation for several thousand cycles. An engraved arrow indicates the position the lever must be in to close the iris. We use a magnetic stainless steel in this iris. Due to its hardness, it offers a longer lifetime than typical non-magnetic stainless steel.
The setscrew on the housing of the iris retains the internal aperture mechanism within the mounting ring and should not be adjusted.
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