SM1-Compatible Kinematic Mounts


SM1 Compatible Kinematic and Gimbal Mounts

  • Ø1.035"-40 Threading
  • Mount SM1 Lens Tubes
  • Mount Ø1"(Ø25mm) Optics


  • Fine Adjustment Actuators for Precise Positioning
  • SM1 Threaded Kinematic and Gimbal Mounts Available
  • Mount Ø1" (Ø25.4 mm) Optics in SM1RR Retaining Rings
  • Integrate SM Threaded Components; such as Lens Tubes, Irises and Adapters

These SM1 (1.035"-40) threaded mounts allow a variety of optical components to be integrated into optomechanical setups. These mounts have either an 8-32 (M4) tapped hole or #8 (M4) counterbore for post mounting. All of these kinematic and gimbal mounts allow for versatility and flexibility in optomechanical constructions due to compatibility with SM1 Threaded lens tubes, irises and adapters.

Kinematic Mounts offer pitch and yaw movement and precise angular adjustment. Gimbal mounts offer rotational movement without angular or postional crosstalk. Both the KC1-T, KCB1 and the KC45D mounts are not only SM1 Series compatible, but also 30 mm cage system compatible.


Ø1" Kinematic Mount for Optics up to 0.14" (3.5 mm) Thick


  • Mounts Thin Ø1" Optics up to 0.14" (3.6 mm) Thick
  • Optics Held with Retaining Ring
  • Angular Range: ±4°
  • Resolution: 8 mrad (0.5°) per rev via Two 1/4"-80 Precision Adjusters
  • Two Counterbored #8 (M4) Through Holes Allow for Left- or Right-Handed Orientation
  • Removable Knobs Expose Hex Sockets in Lead Screws
  • Ø1" Lens Tube Compatible via SM1 Threading

The KM100T mirror mount uses a retaining ring for stress-free mounting of a thin optical component. An optic is secured in the mounting hole with the included SM1RR SM1 (1.035"-40) threaded retaining ring, which can be attached using the SPW602 spanner wrench. This threading also allows the mount to be compatible with Ø1" lens tubes.

The universal KM100T is compatible with both imperial and metric threaded Ø1/2" mounting posts via #8 (M4) counterbored through holes and can be attached to the post in either a right- or left-handed orientation. The mount has removable knobs that expose hex sockets in the lead adjuster screws. The KM100T features 1/4"-80 adjusters for tip and tilt adjustments. An optional accessory, the LN2580 bronze locking nut, is available to lock the adjusters once the desired position is reached.

Thin Kinematic Mounts are also suitable for mounting fiber collimators utilizing adapters such as the AD11F, as shown above.


6-Axis Kinematic Optic Mount


  • Six Adjustment Axes with Locks
    • Kinematic Pitch/Yaw: ±4° at 5 mrad/rev
    • X and Y Translation: ±2 mm at 254 µm/rev
    • Z Translation: 6.35 mm at 318 µm/reva
    • Continuous 360° Roll Control with 1° Graduations
  • Independent X, Y, and Roll Adjustment
  • SM1-Threaded Bore for Ø1" (25 mm) Optics up to 0.55" (14 mm) Thick
  • Six #8 (M4) Counterbores for Post Mounting

The K6XS 6-Axis Kinematic Optic Mount is designed as a general-purpose, high-precision positioner. The optic cell can be translated along 6 axes, and each axis has a locking screw for stability. The translating cell has SM1 (1.035"-40) threading for attaching Ø1" lens tubes or mounting Ø1" (25 mm) optics up to 0.55" (14 mm) thick using the included SM1RR Retaining Ring, which can be tightened using an SPW602 or SPW606 Spanner Wrench (sold separately). The rotating dial has tapped 4-40 holes for attaching the K6A1 (sold separately below).

In testing, the K6XS was shown to drift less than 15 µrad in 48 hours at typical environmental conditions, with a 2 °C temperature fluctuation. The X and Y axes cause less than ±10 µm of crosstalk when translated over their full range.

  • Z-axis translation is accomplished by turning all three tip/tilt adjusters equally in the same direction.


30 mm Kinematic Cage Mount


  • ±4º Angular Rotation, ±3 mm Linear Translation
  • Compatible with 30 mm Cage System
  • Minimum Optic Thickness: 0.04" (1 mm)
  • Maximum Optic Thickness: 0.23" (5.8 mm)
  • Post-Mountable With a #8-32 (M4) Tapped Hole

The KC1-T offers three adjusters with independently locking setscrews. The rugged mechanical design provides excellent stability when mounted in a cage system or on a post.

Both the front and rear plates have been machined with four clearance holes designed for direct compatibility with our 30 mm cage system standards. The rear plate provides locking setscrews to clamp to cage rods for secure positioning. The cage rod holes in the front plate are sufficiently oversized to allow ±4º tip and tilt without interference with the rods. The KC1-T has an SM1 (1.035"-40) center tap for mounting optics and is compatible with our SM1-Series Lens Tubes and related accessories. Two SM1RR Retaining Rings are included with the KC1-T and can be used to mount a Ø1" optic up to 5.5 mm thick. Thicker optics can be mounted by using an SM1-series lens tube.


30 mm Right Angle Kinematic Cage Mount


  • Mates with 30 mm Cage System
  • Accepts Ø1" (25 mm) Optics
  • Minimum Optic Thickness: 0.12" (3 mm)
  • Compatible with SM1 (1.035"-40) Threaded Lens Tubes
  • Post Mountable: #8-32 and M4 Tapped Holes

The 30 mm Right Angle Kinematic Cage Mount mounts an optic in a double-bored adjustment plate for two lines of stable contact and securely holds the optic with a locking nylon-tipped setscrew. The kinematic adjustment plate mounts the optic at a 45° angle with ±4° pitch and yaw adjustment range and is actuated with 100 TPI (Threads Per Inch) adjustment screws for smooth, high sensitivity movement.


Ø1" Gimbal Mount for the 30 mm Cage System


  • True Gimbal Design
  • Maximum Optic Thickness: 0.24" (6 mm)
  • Mounts Ø1" Optics
  • Compatible with Thorlabs' 30 mm Cage System
  • Full 360º Rotation of Optic Holder
  • ±30º Rotation on the Optic Holder Saddle

The KC45D Turret Mount is designed to allow a Ø1" optic to be rotated about a point in the center of a 30 mm cage assembly with true gimbal motion. The optic holder is free to rotate through 360º. Once its coarse angular orientation is set, the fine adjustment mechanism (i.e., two 100 TPI adjusters offering an adjustment per revolution of 13 mrad/rev) can be used for precise alignment, using the HKTS-5/64 hex key thumbscrew or any other 5/64" hex key or balldriver. The second angular degree of freedom is achieved by rotation of an intermediate saddle. This saddle connects the optic holder to the cage assembly and is free to rotate ±30º.The optic is secured against the back lip of the SM1 (1.035"-40) center tapped region using the included SM1RR Retaining Ring.


Gimbal Mount


  • Designed for Intra-Cavity Use
  • Maximum Optic Thickness: 0.63" (16 mm)
  • Angular Range: ±2.5°
  • Angular Displacement per Revolution: 0.35°


The GM100 gimbal mount for Ø1" optics is designed for intra-cavity use. 50 divisions per revolution graduated adjustment knobs are located on the top surface of the mount, making them easily accessible even if the mount is integrated into an optical cavity. This design provides pure rotational motion without angular or positional crosstalk.


Full Gimbal Mount for Ø1" Optics


  • True Gimbal Design
  • Maximum Optic Thickness: 0.25" (6.4 mm)
  • Mounts Ø1" (25.4 mm) Optics
  • Fine Adjustment Provides ±15° at 1°/rev
  • Fully Lockable Design
  • Superior Kinematic Performance Without Crosstalk

GMB1 optic mount, which is designed to hold Ø1" (Ø25.4 mm) optics up to 0.25" (6.4 mm) thick, features true gimbal motion in order to eliminate crosstalk when steering a beam of light. The point of rotation for both axes is located at the center of the mounted optic’s surface. Utilizing locking thumbscrews and fine pitch adjusters, the GMB1 offers both coarse adjustment and fine tuning.The coarse adjustment allows 360° of manual positioning for both angular degrees of freedom. The fine adjustment allows for ±15° of control, with rotation of the control knob yielding 1° of angular displacement per revolution. The yaw can be adjusted in a similar fashion using the thumbscrew and setscrew closest to the post. After the desired pitch and yaw position is established, the entire mount can be easily locked into place by tightening both thumbscrews and both setscrews.


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