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Ø2" Adapters for Unmounted Optics


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Ø2

Selection Guide
Optic RetentionSmooth 2" Outer DiameterExternally SM2-Threaded Outer Surface
Smooth Bore
w/ Setscrew		Adapters for Ø1", Ø30 mm, or Ø1.5" Optics
Adapter for Ø1.5" Optics
Close Approach Dual
Bore w/ Setscrew		Adapter for Ø1" Optics-
Internal Threads
w/ Retaining Rings		Adapter for Ø1" OpticsAdapters for Optics between
Ø30 mm and Ø48 mm

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 an externally SM2-threaded adapter with a smooth central bore for Ø1.5" optics are also available.

Thorlabs also offers Ø1" adapters for unmounted optics.
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Posted Comments:
Poster: cbrideau
Posted Date: 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.
Poster: sharrell
Posted Date: 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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Unthreaded Mounting Adapters: Small Optic to Ø2" Mount
Unthreaded Mounting Adapters: Small Optic to Ø2in Mount
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ADx Drawing

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", ØØ30 mm and Ø1.5", respectively. Optics are secured against the two contact lines using a nylon-tipped setscrew.

Item # Counterbore ODa Optic Thickness (Max)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)
  • Outer Diameter.
  • This specification is true for thin lenses. For lenses with short focal lengths, and hence large lens curvatures, please contact technical support to ensure a proper fit.
  • Thickness of the adapter. See the drawing to the upper right.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
AD2 Support Documentation AD2 Ø2" OD Adapter for Ø1" Optic, 0.25" Thick $24.00
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AD2-30 Support Documentation AD2-30 Ø2" OD Adapter for Ø30 mm Optic, 0.25" Thick $24.00
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AD2-1.5 Support Documentation AD2-1.5 Customer Inspired! Ø2" OD Adapter for Ø1.5" Optic, 0.33" Thick $22.00
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Unthreaded Mounting Adapter: Ø2" Housing Ø1" Offset Close Approach Bore
Unthreaded Mounting Adapter: Ø2in Housing Ø1in Offset Close Approach Bore
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AD2-CA Drawing

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.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
AD2-CA Support Documentation AD2-CA Ø2" OD Adapter for Ø1" Optic with Clear Aperture, 0.28" Thick $28.00
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Mounting Adapter with Internal Threads
Mounting Adapter with Internal Threads
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ADxT Drawing

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 #CAODOptic Thickness (Max)Internal ThreadRetaining RingSpanner Wrench
AD2T Ø23.0 mma Ø2" 0.37" (9.4 mm)b SM1 (1.035"-40) SM1RR SPW801 or SPW602
  • Clear Aperture of retaining ring.
  • Maximum Optical Thickness: This specification is true for thin lenses. For lenses with short focal lengths, and hence large lens curvatures, please contact technical support to ensure a proper fit.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
AD2T Support Documentation AD2T Ø2" OD Adapter with Internal SM1 Threads, 0.50" Thick $21.00
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Mounting Adapter with External Threads
Mounting Adapter with External Threads
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SM1 Series Adapters

The SM2B2 features external SM2 threads and a Ø1.5" bore through the length of the part. A 4-40 setscrew secures Ø1.5" objects and allows them to be mounted in our SM2 Lens Tubes and SM2-compatible mounts. The SM2B2 adapter is designed to mount many of Thorlabs' isolators into SM2-threaded components.

Item #Center BoreODOptic Thickness (Max)External Thread
SM2B2 Ø1.5" Ø2.20" N/Aa SM2 (2.035"-40)
  • The SM2B2 has a Ø1.5" bore through the length of the part, so the thickness of the mounted object is not limited.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
SM2B2 Support Documentation SM2B2 External SM2 Threaded Adapter with Ø1.5" Bore $27.00
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Mounting Adapters with Internal and External Threads
Mounting Adapters with Internal and External Threads
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SM1 Series Adapters

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 #OpticCAaOptic Thickness (Max)bInternal ThreadExternal ThreadRetaining RingSpanner 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" Ø1.40" (Ø35.6 mm) 0.36" (9.1 mm) 1.535"-40 SM2 (2.035"-40) SM1.5RR
SM2AD39 Ø39 mm Ø1.44" (Ø36.5 mm) 0.36" (9.1 mm) M39.5 x 0.5 SM2 (2.035"-40) SM39RR
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
  • Clear Aperture of Retaining Ring.
  • Maximum Optical Thickness: This specification is true for thin lenses. For lenses with short focal lengths, and hence large lens curvatures, please contact technical support to ensure a proper fit.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
SM2AD30 Support Documentation SM2AD30 NEW! Externally SM2-Threaded Adapter for Ø30 mm Optic, 0.44" Thick $28.00
Today
SM2AD31 Support Documentation SM2AD31 NEW! Externally SM2-Threaded Adapter for Ø31 mm Optic, 0.44" Thick $28.00
Today
SM2AD32 Support Documentation SM2AD32 NEW! Externally SM2-Threaded Adapter for Ø32 mm Optic, 0.44" Thick $28.00
Today
SM2AD33 Support Documentation SM2AD33 NEW! Externally SM2-Threaded Adapter for Ø33 mm Optic, 0.44" Thick $28.00
Today
SM2AD34 Support Documentation SM2AD34 NEW! Externally SM2-Threaded Adapter for Ø34 mm Optic, 0.44" Thick $28.00
Today
SM2AD35 Support Documentation SM2AD35 NEW! Externally SM2-Threaded Adapter for Ø35 mm Optic, 0.44" Thick $28.00
Today
SM2AD36 Support Documentation SM2AD36 NEW! Externally SM2-Threaded Adapter for Ø36 mm Optic, 0.44" Thick $28.00
Today
SM2AD37 Support Documentation SM2AD37 NEW! Externally SM2-Threaded Adapter for Ø37 mm Optic, 0.44" Thick $28.00
Today
SM2AD1.5 Support Documentation SM2AD1.5 NEW! Externally SM2-Threaded Adapter for Ø38 mm Optic, 0.56" Thick $28.00
Today
SM2AD39 Support Documentation SM2AD39 NEW! Externally SM2-Threaded Adapter for Ø39 mm Optic, 0.56" Thick $28.00
Today
SM2AD40 Support Documentation SM2AD40 NEW! Externally SM2-Threaded Adapter for Ø40 mm Optic, 0.56" Thick $28.00
Today
SM2AD41 Support Documentation SM2AD41 NEW! Externally SM2-Threaded Adapter for Ø41 mm Optic, 0.56" Thick $28.00
Today
SM2AD42 Support Documentation SM2AD42 NEW! Externally SM2-Threaded Adapter for Ø42 mm Optic, 0.56" Thick $28.00
Today
SM2AD43 Support Documentation SM2AD43 NEW! Externally SM2-Threaded Adapter for Ø43 mm Optic, 0.56" Thick $28.00
Today
SM2AD44 Support Documentation SM2AD44 NEW! Externally SM2-Threaded Adapter for Ø44 mm Optic, 0.56" Thick $28.00
Today
SM2AD45 Support Documentation SM2AD45 NEW! Externally SM2-Threaded Adapter for Ø45 mm Optic, 0.56" Thick $28.00
Today
SM2AD46 Support Documentation SM2AD46 NEW! Externally SM2-Threaded Adapter for Ø46 mm Optic, 0.56" Thick $28.00
Today
SM2AD47 Support Documentation SM2AD47 NEW! Externally SM2-Threaded Adapter for Ø47 mm Optic, 0.56" Thick $28.00
Today
SM2AD48 Support Documentation SM2AD48 NEW! Externally SM2-Threaded Adapter for Ø48 mm Optic, 0.56" Thick $28.00
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Additional Adapters for Unmounted Optics
  • Ø1/2" Adapters for Unmounted Optics

  • Ø1" Adapters for Unmounted Optics

  • Ø2" Adapters for Unmounted Optics

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