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Products Home / Optomechanical Components / Irises / Apertures / Ring-Actuated SM-Threaded Iris DiaphragmsRing-Actuated SM-Threaded Iris Diaphragms
- Compatible with SM05-, SM1-, or SM2-Threaded Components
- Graduated and Zero Aperture Options
- Design Eliminates Actuating Arm, Significantly Reducing
Clearance Requirements
SM2D25D
SM2-Threaded
Ring-Actuated Iris
SM05D5D
SM05-Threaded
Ring-Actuated Iris
SM1D12C
SM1-Threaded
Graduated Ring-Actuated Iris
SM1D12D
SM1-Threaded
Ring-Actuated
Iris in a 30 mm
Cage System
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Click to Enlarge
An XY Translation Mount can be used to optimize centration of an SM-threaded iris within a cage system.
| Iris Selection Guide |
|---|
| Post-Mountable Irises |
| Unmounted Irises |
| SM-Threaded Lever-Actuated Irises |
| SM-Threaded Ring-Actuated Irises |
| Cage System Irises |
Features
- Ring-Actuated Design is Ideal for Cage Systems
- Versions with a Laser Engraved Scale to Indicate Aperture Size
- Zero Aperture Option Blocks All Incoming Light in Closed Position
- Lockable via Setscrew on the Side of the Housing
Our ring-actuated irises are perfect for tight spaces where the lever on our Standard Lever-Actuated Irises or Threaded Lever-Actuated Irises doesn't easily fit. Ring-actuated irises are especially beneficial within our cage assemblies, preventing interference between a lever actuator and the surrounding cage rods, as shown in the image to the right. The ring actuator provides an intuitive, smooth feel; the aperture size can be locked via a setscrew, see the Drawings tab for details. All of the irises on this page contain black spring steel leaves. For dimensional comparison of the irises on this page, please see the Drawings tab.
| Item # | SM05D5D | SM1D12D | SM2D25D | SM1D12C | SM1D12CZ |
|---|---|---|---|---|---|
| Thread Standard | SM05 (0.535"-40) | SM1 (1.035"-40) | SM2 (2.035"-40) | SM1 (1.035"-40) | SM1 (1.035"-40) |
| Aperture (Min) | Ø0.7 mm (Ø0.03") | Ø0.8 mm (Ø0.03") | Ø1 mm (Ø0.04") | Ø1 mm (Ø0.04") | Zero |
| Aperture (Max) | Ø5 mm (Ø0.20") | Ø12.0 mm (Ø0.47") | Ø25 mm (Ø0.98") | Ø12 mm (Ø0.47") | Ø12 mm (Ø0.47") |
| Item # | SM05D5D | SM1D12D | SM2D25D |
|---|---|---|---|
| Thread Standard | SM05 (0.535"-40) | SM1 (1.035"-40) | SM2 (2.035"-40) |
| Aperture (Min) | Ø0.7 mm (Ø0.03") | Ø0.8 mm (Ø0.03") | Ø1 mm (Ø0.04") |
| Aperture (Max) | Ø5 mm (Ø0.20") | Ø12.0 mm (Ø0.47") | Ø25 mm (Ø0.98") |
| Locking Setscrew Hex | 0.035" (0.9 mm) | 0.05" (1.3 mm) | 0.05" (1.3 mm) |
| Mechanical Drawing (Click Image to Enlarge) |
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| Item # | SM1D12C | SM1D12CZ |
|---|---|---|
| Thread Standard | SM1 (1.035"-40) | SM1 (1.035"-40) |
| Aperture (Min) | Ø1 mm (Ø0.04") | Zero |
| Aperture (Max) | Ø12 mm (Ø0.47") | Ø12 mm (Ø0.47") |
| Locking Setscrew Hex | 0.05" (1.3 mm) | 0.05" (1.3 mm) |
| Mechanical Drawing (Click Image to Enlarge) |
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| Posted Comments: | |
anil
(posted 2018-08-31 04:29:48.37) I want to purchase this item kindly provide the quotation. wskopalik
(posted 2018-09-06 05:19:11.0) This is a response from Wolfgang at Thorlabs. Thank you very much for your inquiry.
I will contact you directly to provide a quotation. wayne.rapp
(posted 2018-03-08 13:27:51.94) Can you tell me an accuracy number that defines the location (concentricity) of the aperture vs. the mounting ring? mvonsivers
(posted 2018-03-09 06:55:50.0) This is a response from Moritz at Thorlabs. Thank you for your inquiry. I will contact you directly to provide information on tolerances of the iris diaphragm dimensions. franciscojavier.avila
(posted 2018-01-08 08:24:46.4) Hello:
I am coupling this variable iris in a rotating motor and I wanted to know the exact correspondence between angular displacement of the wheel and the diameter of the aperture.
Thanks
Francisco. swick
(posted 2018-01-09 04:06:17.0) This is a response from Sebastian at Thorlabs. Thank you for the inquiry. This parameter is not specified but we can provide typical data. I will contact you directly with further information. bdada
(posted 2012-06-05 19:04:00.0) Response from Buki at Thorlabs to kaccie:
Thank you for participating in our feedback forum. I am checking with our production team to see if this modification will negatively impact the performance of the iris. Please note that any modifications will void the warranty on the item.I have contacted you directly to continue this conversation. kaccie
(posted 2012-06-04 06:20:38.0) Regarding the SM1D12C. Would anything strange happen (in terms of proper movement of the blades) if I cut off the back 3 mm of the unit? I ask because the unit is just a bit too thick for my application, and I really don't need the SM1 threads sticking out in the back. Thanks
Kaccie jjurado
(posted 2011-06-16 11:13:00.0) Response from Javier at Thorlabs to k1w05: Thank you very much for contacting us. The distance from aperture plane to the outer face (with the external thread) is 4.14 mm. Keep in mind that your measured value of 4.54 mm is still within the mechanical tolerance range (+/-0.50 mm) of this dimension. Please contact us at techsupport@thorlabs.com if you have any further questions. k1w05
(posted 2011-06-12 09:33:47.0) I have a iris of SM1D12C. I want to design a structure to mount this iris, can you tell me the accurate distance between the apeture plane and one outer face of SM1D12C. The number I measured is about 4.54mm. I hope your accurate number. |
ZoomThese ring-activated irises are threaded with our SM05, SM1, or SM2 thread standard, for compatibility with Thorlabs' line of lens tubes, cage systems, and other threaded accessories. One side of the iris is externally threaded, while the other is internally threaded. This allows for easy insertion into existing systems using standard lens tube components.
The design of these irises is well suited for integration into a cage system with minimal alignment. To precisely optimize the centration of the iris hole to the optical axis of the cage system, Thorlabs recommends mounting the iris on an XY Translation Mount.
Zoom
The SM1D12C graduated iris uses the same convenient ring-actuated design as the irises above, but offers an additional laser-engraved scale, which indicates the actual diameter of the iris in millimeters to within ±0.5 mm. In applications where the iris cannot be easily viewed, such as the lens tube configuration shown at right, this engraved scale greatly simplifies the process of optimizing the iris diameter.
The design of this iris is well suited for integration into a cage system with minimal alignment. To precisely optimize the centration of the iris hole to the optical axis of the cage system, Thorlabs recommends mounting the iris on an XY Translation Mount.
This graduated iris is SM1 (1.035"-40) threaded, making it compatible with our popular Ø1" lens tubes, 30 mm cage plates, and related accessories.
ZoomThe SM1D12CZ zero-aperture graduated iris provides the added benefit of being able to close completely. Our zero-aperture design achieves a completely closed aperture by utilizing two sets of steel leaves mounted in two adjacent planes. When the ring is in the closed position, the iris aperture is completely closed (zero aperture), unlike a standard iris, which has a non-zero diameter aperture when in the minimum position. Please note that as the aperture gets smaller, it also becomes slightly elliptical due to the design of the iris.
The SM1D12CZ uses the convenient graduated ring-actuated design as the iris above with a laser-engraved scale, which indicates the actual diameter of the iris in millimeters to within ±0.5 mm. In applications where the iris cannot be easily viewed, this engraved scale greatly simplifies the process of optimizing the iris diameter.
The design of this iris is well suited for integration into a cage system with minimal alignment. To precisely optimize the centration of the iris hole to the optical axis of the cage system, Thorlabs recommends mounting the iris on an XY Translation Mount.
This iris is SM1 (1.035"-40) threaded, making it compatible with our popular Ø1" lens tubes, 30 mm cage plates, and related accessories.
SM-Threaded Ring Irises
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