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SM1-Compatible Fixed Mounts

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SM1-Threaded Irises and Shutter




  • SM1(1.035"-40)Threading
  • Mount SM1 Lens Tubes and Ø1"(Ø25mm) Optics
  • Standard, Indexing, Nested, and Quick-Release Options Available

Features

  • SM1-Threaded (1.035"-40) Fixed Mounts
  • Integrate SM1-Threaded Components, such as Lens Tubes, Irises, and Adapters
  • Wide Range of Mounts Available

These SM1-threaded (1.035"-40) fixed mounts allow optical components to be integrated into optomechanical setups. Thorlabs offers internally and externally threaded, quick-release, indexing, nested, 90° flip, and flexure stage mounts. All mounts except the flexure stage mount (Item # HCS031) are post mountable via an 8-32 (M4) tapped hole. The flexure stage mount allows SM1-threaded components to be mounted to any stage using the 3 mm wide alignment groove. The varied configurations provide versatile and flexibile optomechanical constructions.

 


Lens Mount with Internal SM1 Threading

 

  • Internal SM1 Threads
  • Mounts Optics up to 0.28" (7.1 mm) Thick
  • Opitcs Held in Mount via SM1RR Retaining Ring (Included)
  • 8-32 (M4) Tapped Hole for Mounting to a Ø1/2" Post

This fixed optic mount is a convenient way to mount a Ø1" optic on a Ø1/2" post via the 8-32 (M4) tapped hole on the base of the mount. Each LMR1(/M) mount has an internally SM1-threaded (1.035"-40) hole equipped with a back-edge lip on which the optic rests. The SM1 retaining ring (SM1RR) included with each mount can then be used to secure the optic in place by sandwiching the optic between itself and the back lip. Additional retaining rings can be purchased separately, including a stress-free retaining ring. This fixed optic mount is also used to hold other optical components with external SM1 threads.

Item #Optic
Diameter
Max Optic
Thicknessa
Clear
Aperture
Optical
Height
Included
Retaining Ring
Suggested
Spanner Wrench
LMR1(/M) Ø1" 0.28" (7.1 mm) Ø0.90" (Ø23.0mm) 0.87" (22.1 mm) SM1RR SPW602 or SPW606

 

  • This specification is true for thin lenses. For lenses with small focal lengths, and hence large lens curvatures, please contact Tech Support to ensure a proper fit.

 

Lens Mount with External and Internal SM1 Threading

 

  • Internal and External SM1 Threads
  • Mounts Optics up to 0.28" (7.1 mm) Thick
  • Opitcs Held in Mount via SM1RR Retaining Ring (Included)
  • 8-32 (M4) Tapped Hole for Mounting to Ø1/2" Posts
  • Add or Remove SM1-Threaded Components without Losing Access to the Mounted Optic

 

This fixed lens mount features internal SM1 (1.035"-40) threading on one side and external SM1 threading on the other. The optic is secured in the mount with the included retaining ring and has an 8-32 (M4) tapped hole for mounting to a Ø1/2" Post.

 

The internal threading is deep enough to hold unmounted optics up to 0.28" (7.1 mm) thick, while the external threading is just deep enough to allow for the mounting of lens tubes, irises, or other internally SM1-threaded components (see picture to the right). Although the functionality of this part can be duplicated by combining two other Thorlabs parts, a lens tube slip ring and a lens tube, this fixed mount offers a significant price reduction, increased convenience, and smaller package size.

Item #Optic
Diameter
Max Optic
Thicknessa
Clear
Aperture
Optical
Height
Included
Retaining Ring
Suggested
Spanner Wrench
LMR1S(/M) Ø1" 0.28" (7.1 mm) Ø0.90" (Ø23.0 mm) 0.87" (22.1 mm) SM1RR SPW602 or SPW606

 

  • This specification is true for thin lenses. For lenses with small focal lengths, and hence large lens curvatures, please contact Tech Support to ensure a proper fit.

 

Ø1" Lens Tube Post Mounts

 

  • Internal SM1 Threads
  • Mounts Optics up to 0.24" (6.1 mm) Thick
  • Opitcs Held in Mount via 2 SM1RR Retaining Rings (Sold Separately)
  • 8-32 (M4) Tapped Hole for Mounting to Ø1/2" Posts
  • Mount Externally SM1-Threaded Components on Either Side

 

This SM1-threaded (1.035"-40) Lens Tube Post Mount features internal SM1 (1.035"-40) threading that extends the full length of the mount without any retaining lip. It is perfect for mounting lens tubes and other mounted optics, and can also be used to hold unmounted optics when used with two retaining rings (sold separately below).

Item #Optic
Diameter
Max Optic
Thicknessa
Clear
Aperture
Optical
Height
Compatible Retaining
Ring (Not Included)
Suggested
Spanner Wrench
SMR1(/M) Ø1" 0.24" (6.1 mm) Ø1.0" (Ø25.4 mm) 0.87" (22.1 mm) SM1RR SPW602 or SPW606

 

  • This specification is true for thin lenses. For lenses with small focal lengths, and hence large lens curvatures, please contact Tech Support to ensure a proper fit.

 

Lens Mount with Quick-Release Carriage

 

  • SM1-Threaded Mounting Carriage for Ø1" (Ø25.4 mm) Optics
  • One Retaining Ring (SM1RR) Included
  • Magnetically Coupled Removable Mounting Carriage
  • 8-32 (M4) Tapped Hole on Back Plate for Post Mounting
  • Ideal for Use with Lenses, Filters, Apertures, and Other Optics

 

The KB1P(/M) is an SM1-threaded (1.035"-40) lens mount with a magnetically coupled removable mounting carriage. This mount is designed for applications that require a Ø1" (Ø25.4 mm) optical element, such as a lens, to be periodically inserted and removed from an optical setup with a high degree of precision. The magnetically coupled mounting carriage eliminates the need to align the optic when it is reinserted into the setup. For stability, precision, and repeatability, the mounting carriage contacts the back plate at three points. Each point of contact is a ball bearing on the mounting carriage resting in the groove formed by two parallel steel pins. The coupling force is provided by pairs of rare earth magnets.

The mounting carriage and back plate can also be purchased separately as the KB1F(/M) and KB1B(/M), respectively. The KB1B(/M) features an 8-32 (M4) tapped hole

ParameterValue
Max Optic Thickness 0.35" (8.9 mm)
Repeatability* 1 µm

 

* The repeatability specification (1 µm) indicates that the X, Y, and Z position of the mount will not vary by more than 1 µm after being removed and replaced.

 

Indexing Mount for Ø1" Optics

 

  • Indexed with 16 Positions at 22.5° Increments
  • Holds Ø1" Optics up to 7 mm (0.27") Thick
  • Three 8-32 (M4) Mounting Holes in Bottom Plate
  • Easy, Repeatable Exchange of Optical Components

 

The NX1N(/M) indexing mount for Ø1" optics features 16 indexed positions every 22.5° allowing the optic to be held at both 45° and 90°. The angular positions are engraved on the base plate for fast alignment. The top plate returns to any given position, indicated with an engraved witness line, with a repeatability of better than 10 µrad. This mount is ideal for redirecting a laser to multiple targets on an optical table, as well as for precise switching of shared laser systems.

 

The included SM1 (1.035"-40) retaining ring (SM1RR) secures the optic against the front lip of the mount. This indexing mount can hold optics that are no greater than 7 mm (0.27") thick. Neodymium iron magnets couple the top and bottom plates while stainless steel ball bearings and V-grooves provide the 16 indexing positions. Three 8-32 (M4) tapped mounting holes in the bottom plate allow the mount to be secured to a Ø1/2" post. A small through hole, located directly under the 90° engraving on the bottom plate, accepts a 5/64" (2.00 mm) ball driver to help provide enough torque when attaching the mount to the post.

 

Please Note: The top plate of this indexing mount is not compatible with the NX1F(/M) 15-position, indexing mounting base (sold separately).

 

 


Nested Optical Mount


* "A" Optic Carriage Nests within "B" Mounting Ring
* "A" Carriage Laser Engraved Every 2°
* Mounts Ø1" (Ø25.4 mm) up to 0.38" (9.6 mm) Thick

These nested lens mount sets are comprised of an inner optic carriage and an outer mounting ring (sold separately). This allows easy exchange of optics while maintaining optical alignment. The "-A" inner carriage is radially laser engraved with graduation marks every 2° and labeled every 20°. The LM1-A carriage accepts Ø1" (25 mm) optics up to a thickness of 0.38" (9.6 mm) into its SM1 (1.035"-40) threaded bore. The mating LM1-B positionally locks the LM1-A with a top-located thumbscrew and is post mountable via a bottom 8-32 (M4) tapped hole. Each LM1-A includes one SM1RR retaining ring for fastening optics within the SM1-threaded (1.035"-40) bore.

 

Filter Mount with 90° Flip

 

  • Holds Filters up to 0.37" (9.4 mm) Thick
  • Post and Rod Mounted for Greater Flexibility
  • Detent Force at 0º and 90º, Lockable Across Entire Range

The TRF90 Filter Mount combines versatility in a compact, easy-to-operate design. The TRF90 can be post mounted as an individual unit or ER-cage-rod-mounted for stacking filters in a series. Since the depth of the filter mount is 0.5" (13 mm), the minimum length of the ER rod needed when creating a stack of filters is the number of filter mounts being stacked times 0.5" (13 mm). A precision detent mechanism provides holding force at the 0° and 90° positions, while a nylon setscrew allows the mount to be locked.

Please note that the threaded hole used to attach the post to the filter mount goes all the way through to the rotation mechanism. Be sure that no more than 0.2" (5 mm) of the screw on top of the post is threaded into the filter mount in order to prevent the binding of the rotation mechanism.

 

Flexure Stage Mount and Height Adapter

 

The HCS031 flexure stage mount allows most Thorlabs SM1-based products to be mounted to any stage using the standard 3 mm wide alignment groove. The optical axis height of this mount is 18 mm, which requires any accessory being used in the same system to be fitted with the AMA093 Shim Block detailed below.

The AMA093 Shim Block fits under any Thorlabs accessory and increases the optical axis height to 18 mm to match the HCS031. The shim block includes two mounting cleats, with extended screws, to fasten accessories to the top deck of the stage.

 

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