Products Home / Optomechanical Components / Adapters / Adapters for Unmounted Optics / Ø2" Adapters for Unmounted OpticsØ2" Adapters for Unmounted Optics
- Mounting Solutions for Ø1" to Ø48 mm Optics
- Adapt Optics to Mounts with Either Ø2" Bore or Internal SM2 Threading
- Setscrew or Retaining Ring for Optic Retention
AD2
Ø1" Smooth Central Bore
Ø2" Smooth Outer Surface
SM2AD42
Internally M42.5 x 0.5 Threaded
Central Bore, Externally SM2 Threaded
SM2B2
Ø1.51" Smooth Central Bore,
Externally SM2 Threaded
AD2T
Internally SM1-Threaded
Central Bore, Ø2" Smooth
Outer Surface
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| Selection Guide | ||
|---|---|---|
| Optic Retention | Smooth 2" Outer Diameter | Externally SM2-Threaded Outer Surface |
| Smooth Bore w/ Setscrew | Adapters for Ø1", Ø30 mm, or Ø1.5" Optics | Adapter for Ø1.5" Components |
| Close Approach Dual Bore w/ Setscrew | Adapter for Ø1" Optics | - |
| Internal Threads w/ Retaining Rings | Adapter for Ø1" Optics | Adapters for Optics between Ø30 mm and Ø48 mm |
| Smooth Bore w/ Setscrew | Adapter for Ø1.2" Components | |
Thorlabs offers these Ø2" adapters for unmounted optics to easily integrate various optic diameter standards into Ø2" optomechanical systems, including optic mounts and lens tubes (see the Selection Guide to the right). The unthreaded adapters presented here are double-bored to provide 2 lines of mounting contact for Ø1", Ø30 mm, or Ø1.5" optics. Our externally SM2- (2.035"-40) threaded adapters with internally threaded central bores can house optics ranging from Ø30 mm to Ø48 mm. A Ø2" adapter with internal SM1 (1.053"-40) threading for Ø1" optics and and externally SM2-threaded adapters with smooth central bores for components are also available.
Thorlabs also offers Ø1" adapters for unmounted optics.
| Posted Comments: | |
jim.guenter
(posted 2017-02-16 15:28:56.237) Unfortunately my optic is 28 mm diameter, too large for SM1, but 2 mm too small for your smallest SM2 adapter. Any chance you have something smaller, or a blank that we could put our own hole in for the optic? Ultimately need to mate to an SM1 tube system on both sides of the lens, but we can use adapters with an SM2 section if necessary. tfrisch
(posted 2017-02-20 09:43:16.0) Hello, thank you for contacting Thorlabs. I will reach out to you about our Self Centering lens mounts like SCL60C. You may be able to use that with adapters to the SM1 system. ludoangot
(posted 2016-01-29 11:54:57.927) Your AD2-30 has the 30mm smooth bore I am looking for but no external SM2 thread. Do you have such an adapter (1.18"/ 30mm internal smooth bore and SM2 ext. thread)? Or could you please suggest a solution to mount a 30mm outer diameter objective lens into your SM2 tubes? My exact purpose is to mount said objective lens into your XY translation mount ref. CXY2. jlow
(posted 2016-02-01 09:33:02.0) Response from Jeremy at Thorlabs: Once the optic is mounted in the AD2-30, you can put that into a SM2 lens tube such as SM2L05, which can then be attached for the CXY2. If your optic thickness is <7.1mm, then you could also mount your optic into the SM2AD30, which can be attached to the CXY2. f.niewoehner
(posted 2014-05-04 07:20:31.103) Dear sir or madame,
I have a question to you. Do you offer any mounts for your 2'' lens tubes to fix your square Diffraction Gratings inside of it?
Thanks in advance.
Sincerely,
Frauke Niewöhner
Friedrich-Alexander university Erlangen-Nuremberg cdaly
(posted 2014-05-08 03:38:11.0) Response from Chris at Thorlabs: There's no direct adapter, but a few can be used The grating can be mounted in a KGM20, KGM40, or KGM60, depending on the size. Each would then provide a 1" outer bore diameter surface which can be converted to an SM1 thread using an SM1P1 adapter and then to an SM2 thread using an SM2A6 adapter. cbrideau
(posted 2013-04-05 14:27:36.547) Picture caption at top of page has SM2AB2 as part number, but in list below shows it as SM2B2. sharrell
(posted 2013-04-05 14:44:00.0) Response from Sean at Thorlabs: Thank you for pointing out our error. We are working on fixing the caption. |
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Ø1" Optic Mounted in a Ø2" KM200 Mirror Mount Using an AD2 Adapter
| Item # | Counterbore | ODa | Optic Thickness (Min)b | Tc |
|---|---|---|---|---|
| AD2 | Ø1.00" (Ø25.4 mm) | Ø2.00" | 0.22" (5.6 mm) | 0.25" (6.4 mm) |
| AD2-30 | Ø30 mm (Ø1.18") | Ø2.00" | 0.22" (5.6 mm) | 0.25" (6.4 mm) |
| AD2-1.5 | Ø1.51" (Ø38 mm) | Ø2.00" | 0.27" (6.9 mm) | 0.33" (8.4 mm) |
These unthreaded adapters feature a smooth Ø2" outer surface and a double-bored counterbore to provide two lines of mounting contact. The counterbores in the AD2, AD2-30, and AD2-1.5 are Ø1", Ø30 mm and Ø1.5", respectively. Optics are secured against the two contact lines using a nylon-tipped setscrew.
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The AD2-CA Adapter Allows Separation of Closely Spaced Beams Using Ø1" Optics
The AD2-CA is designed with a 2" outer diameter and dual Ø1" internal bores. Please note that only one internal bore is meant for mounting the optic, which is held in place with an 8-32 nylon-tipped setscrew. This adapter enables separation of closely spaced beams with Ø1" circular optical components and is ideal for applications that require a narrow-angle back reflection. If you wish to mount one of our D-shaped mirrors, we recommend using one of our D-shaped mirror mounts.
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Ø1" Optic in Threaded SM1 Lens Tube Mounted in Ø2" KM200 Mirror Mount Using an AD2T Adapter
The AD2T Adapter features internal SM1 threading and is designed to hold a Ø1" unmounted optic up to 0.37" (9.4 mm) thick with the included SM1RR retaining ring.b Alternatively, retaining rings can be used to hold this adapter in an SM2 lens tube. With a smooth outer diameter, the AD2T is especially well suited for mounting Ø1" wave plates into Ø2" mounts.
| Item # | CA | OD | Optic Thickness (Max) | Internal Thread | Retaining Ring | Spanner Wrench |
|---|---|---|---|---|---|---|
| AD2T | Ø23.0 mma | Ø2" | 0.37" (9.4 mm)b | SM1 (1.035"-40) | SM1RR | SPW801 or SPW602 |
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These adapters feature external SM2 threads and center bores through the length of each part. The SM2B2 adapter has a 0.05" hex setscrew that secures Ø1.5" objects. The SM2A21 adapter has a 5/64" (2 mm) hex nylon-tipped setscrew, secures Ø1.2" components, and also features a 2.00" (50.8 mm) outer diameter. This allows the SM2A21 to be used with Ø2" optic mounts, such as the KM200. Both mounts feature SM2 threads, allowing them to be mounted in our SM2 Lens Tubes and SM2-compatible mounts.
| Item # | Bore | OD | Optic Thickness (Max) | External Thread |
|---|---|---|---|---|
| SM2A21 | Ø1.20" (Ø30.5 mm) | Ø2.00" (Ø50.8 mm) | N/Aa | SM2 (2.035"-40) |
| SM2B2 | Ø1.51" (Ø38.2 mm) | Ø2.20" (Ø55.9 mm) | N/Aa | SM2 (2.035"-40) |
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These externally SM2-threaded adapters are designed to mount optics between Ø30 mm and Ø48 mm in internally SM2-threaded components, such as our Ø2" Lens Tubes or Ø2" Optic Mounts. Each mount features external SM2 threads and an internally threaded central bore (see the table below for thread specifications). Two retaining rings are included for securing optics in the adapter.
| Item # | Optic | CAa | Optic Thickness (Max)b | Internal Thread | External Thread | Retaining Ring | Spanner Wrench |
|---|---|---|---|---|---|---|---|
| SM2AD30 | Ø30 mm | Ø1.10" (Ø27.9 mm) | 0.28" (7.1 mm) | M30.5 x 0.5 | SM2 (2.035"-40) | SM30RR | SPW801 |
| SM2AD31 | Ø31 mm | Ø1.14" (Ø29.0 mm) | 0.28" (7.1 mm) | M31.5 x 0.5 | SM2 (2.035"-40) | SM31RR | |
| SM2AD32 | Ø32 mm | Ø1.18" (Ø30.0 mm) | 0.28" (7.1 mm) | M32.5 x 0.5 | SM2 (2.035"-40) | SM32RR | |
| SM2AD33 | Ø33 mm | Ø1.22" (Ø31.0 mm) | 0.28" (7.1 mm) | M33.5 x 0.5 | SM2 (2.035"-40) | SM33RR | |
| SM2AD34 | Ø34 mm | Ø1.26" (Ø32.0 mm) | 0.28" (7.1 mm) | M34.5 x 0.5 | SM2 (2.035"-40) | SM34RR | |
| SM2AD35 | Ø35 mm | Ø1.30" (Ø33.0 mm) | 0.28" (7.1 mm) | M35.5 x 0.5 | SM2 (2.035"-40) | SM35RR | |
| SM2AD36 | Ø36 mm | Ø1.34" (Ø34.0 mm) | 0.28" (7.1 mm) | M36.5 x 0.5 | SM2 (2.035"-40) | SM36RR | |
| SM2AD37 | Ø37 mm | Ø1.38" (Ø35.0 mm) | 0.28" (7.1 mm) | M37.5 x 0.5 | SM2 (2.035"-40) | SM37RR | |
| SM2AD1.5 | Ø1.5" | Ø1.37" (Ø34.8 mm) | 0.36" (9.1 mm) | 1.535"-40 | SM2 (2.035"-40) | SM1.5RR | SPW608 or SPW801 |
| SM2AD39 | Ø39 mm | Ø1.44" (Ø36.5 mm) | 0.36" (9.1 mm) | M39.5 x 0.5 | SM2 (2.035"-40) | SM39RR | SPW801 |
| SM2AD40 | Ø40 mm | Ø1.47" (Ø37.5 mm) | 0.36" (9.1 mm) | M40.5 x 0.5 | SM2 (2.035"-40) | SM40RR | |
| SM2AD41 | Ø41 mm | Ø1.51" (Ø38.5 mm) | 0.36" (9.1 mm) | M41.5 x 0.5 | SM2 (2.035"-40) | SM41RR | |
| SM2AD42 | Ø42 mm | Ø1.55" (Ø39.5 mm) | 0.36" (9.1 mm) | M42.5 x 0.5 | SM2 (2.035"-40) | SM42RR | |
| SM2AD43 | Ø43 mm | Ø1.59" (Ø40.5 mm) | 0.36" (9.1 mm) | M43.5 x 0.5 | SM2 (2.035"-40) | SM43RR | |
| SM2AD44 | Ø44 mm | Ø1.63" (Ø41.5 mm) | 0.36" (9.1 mm) | M44.5 x 0.5 | SM2 (2.035"-40) | SM44RR | |
| SM2AD45 | Ø45 mm | Ø1.67" (Ø42.4 mm) | 0.36" (9.1 mm) | M45.5 x 0.5 | SM2 (2.035"-40) | SM45RR | |
| SM2AD46 | Ø46 mm | Ø1.71" (Ø43.5 mm) | 0.36" (9.1 mm) | M46.5 x 0.5 | SM2 (2.035"-40) | SM46RR | |
| SM2AD47 | Ø47 mm | Ø1.75" (Ø44.5 mm) | 0.36" (9.1 mm) | M47.5 x 0.5 | SM2 (2.035"-40) | SM47RR | |
| SM2AD48 | Ø48 mm | Ø1.79" (Ø45.5 mm) | 0.36" (9.1 mm) | M48.5 x 0.5 | SM2 (2.035"-40) | SM48RR |
Ø2" Adapters for Unmounted Round Optics