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Ø1/2" Adapters for Unmounted Optics


  • Glue-in Mount for Small Optics or Drop-in Mount for Ø1" Optics
  • Adapt Optics to Ø1/2" Mounts

AD1B

Adapts Ø1" Optics
to Ø1/2" Mounts

LMRA9

Adapts 9 mm Optics
to Ø1/2" Mounts

LMRA5

Adapts 5 mm Optics
to Ø1/2" Mounts

Application Idea

Epoxy is used to affix optics to our small-optic adapters which are then mounted in an LMR05 mount.

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Thorlabs offers these versatile mounts to adapt easily between various optic diameter standards. With options for Ø2 mm to Ø9 mm optics, as well as Ø1" optics, this family of adapters offers a wide range of solutions for adapting optics to Ø1/2" optomechanical systems, including optical mounts and lens tubes.


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Stainless Steel Mounting Adapters: Small Optics to Ø1/2" Mount

LMRA8 Being Attached in a Mount with Internal SM05 ThreadingClick to Enlarge
An Ø8.0 mm lens is epoxied into an LMRA8 Adapter and then inserted into an internally SM05-threaded component.  A retaining ring can then be used to secure the LMRA8 into the SM05 threaded component.
  • Mounts Non-Standard Optics into our Standard Threaded Ø1/2" Optic Mounts
  • Can be Used Directly with SM05 Lens Tubes
  • Mounts for Ø2 mm, Ø3 mm, Ø5 mm, Ø6 mm, Ø6.35 mm, Ø7 mm, Ø7.4 mm, Ø8 mm, and Ø9 mm
  • Glue Ports Provided to Secure Optic in Housing

Thorlabs' small-optic mounting adapters are designed to mount non-standard optic sizes into Ø1/2" Mounts. Each stainless steel adapter includes two or three reservoirs next to the lens cell to secure the lens in place with General Purpose or UV Curing epoxy. Simply place a drop or two of adhesive into each reservoir located next to the lens in the adapter. We recommend using our NOA61 UV curing adhesive and MS403-10 epoxy syringe.

The Ø1/2" Optic Mounting Adapters featured below are compatible with our LMR05 (LMR05/M) or MLH05 (MLH05/M) Lens Mounts, SM05 Lens Tubes, or 16 mm Cage Components. Once the optic is secured in the small-optic adapter, the new assembly is held in one of these threaded mounts using an SM05RR Retaining Ring.

Also available is the LMRA10 for Ø10 mm optics, which has an outer diameter of 18 mm, and adapters with Ø1" outer diameters or external SM1 threads that use retaining rings to hold optics between Ø5 mm and Ø20 mm. Alternatively, we offer internally threaded, post-mountable fixed mounts for mounting optics from Ø5 mm to Ø4".

Incorporating Small Optics into Lens Tube Systems
In addition to providing a means for mounting small optics in our LMR series of lens mounts, these adapters are directly compatible with our SM05 Lens Tubes, making it possible to insert Ø2 mm to Ø9 mm optics into a lens tube system.

Item # Optic Diameter Clear Aperture Outer Diameter Thickness Compatible Mounts
Typ. Max
LMRA2 2 mm 2.05 mm Ø1.8 mm (Ø0.07") 12.7 mm
(1/2")
2.2 mm
(0.09")
MLH05 Lens Mount
LMR05 Lens Mount
SM05 Lens Tubes
16 mm Cage Components
LMRA3 3 mm 3.05 mm Ø2.4 mm (Ø0.11")
LMRA5 5 mm 5.05 mm Ø3.8 mm (Ø0.15")
LMRA6 6 mm 6.07 mm Ø4.8 mm (Ø0.19")
LMRA6.35 6.35 mm 6.4 mm Ø5.4 mm (Ø0.21")
LMRA7 7 mm 7.03 mm Ø6.0 mm (Ø0.24")
LMRA7.4 7.4 mm 7.41 mm Ø6.4 mm (Ø0.25")
LMRA8 8 mm 8.02 mm Ø7.0 mm (Ø0.28")
LMRA9 9 mm 9.01 mm Ø7.9 mm (Ø0.31")
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
LMRA2 Support Documentation
LMRA2Ø1/2" Adapter for Ø2 mm Optics
$23.50
Today
LMRA3 Support Documentation
LMRA3Ø1/2" Adapter for Ø3 mm Optics
$23.50
Today
LMRA5 Support Documentation
LMRA5Ø1/2" Adapter for Ø5 mm Optics
$16.08
Today
LMRA6 Support Documentation
LMRA6Ø1/2" Adapter for Ø6 mm Optics
$16.08
Today
LMRA6.35 Support Documentation
LMRA6.35Ø1/2" Adapter for Ø6.35 mm Optics
$16.08
Today
LMRA7 Support Documentation
LMRA7Ø1/2" Adapter for Ø7 mm Optics
$14.81
Today
LMRA7.4 Support Documentation
LMRA7.4Ø1/2" Adapter for Ø7.4 mm Optics
$14.81
Today
LMRA8 Support Documentation
LMRA8Ø1/2" Adapter for Ø8 mm Optics
$16.08
Today
LMRA9 Support Documentation
LMRA9Ø1/2" Adapter for Ø9 mm Optics
$16.08
Today

Unthreaded Mounting Adapter: Ø1" Optic to Ø1/2" Mount

  • Mounts Ø1" Optics into our Standard Ø1/2" Optic Mounts
  • Ø0.35" Through Hole for Compatibility with Ø1" Optical Filters
  • Nylon-Tipped Setscrew Holds the Optic Securely in Place
  • Minimum Optic Thickness: 3 mm 

The AD1B features an internal smooth bore with a 1" mounting diameter and an external 1/2" mounting diameter compatible with Ø1/2" mounts, such as the KM05 Kinematic Mount. A nylon-tipped 8-32 setscrew (which requires a 5/64" hex key) holds the Ø1" optic securely against two contact lines machined into the inside diameter.  In addition, it features a through hole with a clear aperture of Ø0.35" to accommodate Ø1" optical filters.

In conjunction with the SM05P05 External SM05 Thread to Ø1/2" Optic Mount Adapter, the AD1B can be used to mount Ø1" optical filters to the end of a Ø1/2"  lens tube, allowing a user to incorporate Ø1" optical filters into a Ø1/2" lens tube system, as shown in the photo below.

A one inch mirror mounted in a KM05 using part AD1B
Click to Enlarge
View Imperial Product List
Item #QtyDescription
Imperial Product List
AD1B1Ø1/2” Mount Adapter for Ø1” Optics
KM051Kinematic Mirror Mount for Ø1/2" Optics, 8-32 Taps
TR31Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 3"
View Metric Product List
Item #QtyDescription
Metric Product List
AD1B1Ø1/2” Mount Adapter for Ø1” Optics
KM05/M1Kinematic Mirror Mount for Ø1/2" Optics, M4 Taps
TR75/M1Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 75 mm
An AD1B is being used to mount a Ø1" mirror in a KM05  Ø1/2" kinematic mount.
A one inch optical filter mounted to a half inch lens tube mount using the adapters AD1B and SM05P05
Click to Enlarge
View Imperial Product List
Item #QtyDescription
Imperial Product List
AD1B1Ø1/2” Mount Adapter for Ø1” Optics
SM05P051External SM05 Thread to Ø1/2" Optic Mount Adapter
SM05L301SM05 Lens Tube, 3" Thread Depth, One Retaining Ring Included
TR31Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 3"
SM05TC1Ø0.70" Clamp for SM05 Lens Tubes
View Metric Product List
Item #QtyDescription
Metric Product List
AD1B1Ø1/2” Mount Adapter for Ø1” Optics
SM05P051External SM05 Thread to Ø1/2" Optic Mount Adapter
SM05L301SM05 Lens Tube, 3" Thread Depth, One Retaining Ring Included
TR75/M1Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 75 mm
SM05TC1Ø0.70" Clamp for SM05 Lens Tubes
An AD1B is being used with a SM05P05 to mount a Ø1" optical filter to the end of a  Ø1/2" lens tube.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
AD1B Support Documentation
AD1BØ1/2” Mount Adapter for Ø1” Optics
$26.79
Today
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