Angled Optic Lens Tube


SM Series Angled Optic Mounts

  • 10° Angle Reduces Etalon Effects on Plano/Plano Optics
  • Eliminate Back-Reflections
  • Accepts Optics up to 5mm Thick


  • 10° Angle Reduces Etalon Effects on Plano/Plano Optics
  • Allows for Elimination of Back-Reflections
  • Accepts Optics up to 5mm Thick
  • SM1 (1.035"-40) Threaded
  • SM1RR Retaining Ring Included
  • SM1NT Locking Nut Included

The SM1L03T angled optic mount is designed to minimize back reflections when a Ø1" optical window is placed in a setup. When seated, the mount holds the optic at a 10° angle. The SM threading on the rear side allows the mount to be easily coupled to a Ø1" lens tube. Using our SM1 thread adapters, the mount can also be added to a Ø1/2", Ø2", or Ø3" lens tube setup. Optics up to 5 mm thick can be accommodated. This mount is perfect for use with any of our narrow band laser windows or our selection of broadband windows.

Since the beam exiting the angled window is displaced as a function of the thickness of the window and its material, Thorlabs recommends using the angled optic mount together with an X-Y Translating Mount such as the LM1XY to offset this displacement.


Thorlabs' Stackable Lens Tubes provide an easy and fast solution for assembly of an optical system with a single optical axis. Using lens tubes one can easily assemble several optical components on a common optical axis without the need for X-Y alignment of each component to the common axis. Thorlabs offers Ø1/2”, Ø1”, Ø2” and Ø3” lens tubes, for use with different optics sizes, as well as adapters to convert between the four different sizes.

Thorlabs also offers many of our optical components in pre-mounted 1” lens tubes as well as specially developed components and mounts, all of which are pre-aligned to the optical axis, including:

  • Iris Diaphragms that can be controlled from outside the lens tube
  • Adjustable focus tubes
  • Translating mounts
  • Fiber adapters
  • Laser diode mounts
  • Temperature controlled tubes
  • Angled mounts
  • Mounting adapters for microscope objective and c-mount optics.

Thorlabs has also added alignment tools for lens tubes for working with IR optics, such as infrared alignment disks and alignment targets. Additionally, with the use of retaining rings, any standard optical component can be easily mounted into the lens tubes.

For more complex optical systems Thorlabs has developed sets of post mounting rings, and mounting brackets and construction cubes to enable building complex, rugged systems.

Thorlabs lens tubes can also easily interface with our cage system components such as the cage plates, kinematic turning mirror mounts, pre-mounted beamsplitter cubes and pre-mounted turning mirrors.


Our Mission is to accelerate the advancement of optical technology for precision measurements and their applications from the table tops of research laboratories to standard use in communication and high technology industries. Our aim is to serve our customers. Our hope is to create a place for highly skilled people in an open environment

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