Mini-Series Kinematic Prism Mount

  • Mounts for Prisms, Fixed Optic Mounts, or Beamsplitters
  • 4-40 (M3) Mounting Holes
  • Compact Footprint


Mini-Series Adjustable Clamping Arm



Mini-Series Kinematic Prism Mount

An MPM05 Clamping Arm can be used with the MK05PM Mount to secure a BS034 Beamsplitter.

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A 1/2" BS005 Beamsplitter is secured to the MK05PM Mount with an MPM05 Clamping Arm.


  • Kinematic Horizontal Mounting Surfaces
  • Mount Prisms, Beamsplitters, and Non-Standard Optics
  • ±5° of Tip and/or Tilt Adjustment
  • Fabricated from Black Anodized Aluminum
  • Clamping Arm for Securing Optics to the Mount

The MK05PM(/M) Mini-Series Kinematic Prism Mount is suited for mounting prisms, beamsplitters, and non-standard optics. The mount features two axes of ±5° tip/tilt adjustment.

The mount has two axes of adjustment and features a mounting surface with two 4-40 (M3) taps to mount our MPM05(/M) Clamping Arm. Additionally, the clamping arm can be mounted via the 4-40 (M3) tap on the back plate elevated above the mounting surface. The back plate of each of these mounts also features two 4-40 (M3) tapped through holes for mounting to a Ø6 mm Mini-Series Optical Post. This mini-series mount has a compact footprint suitable for applications where space is at a premium.

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Mini-Series Kinematic Prism Mount

  • Two M2.5 x 0.20 Fine Adjusters for ±5° of Tip and Tilt Control
  • Designed for Use with the Mini-Series Clamping Arm (Sold Below)
  • 4-40 (M3) Tapped Through Holes in Back Plate of Mount for Ø6 mm Post Mounting
  • Fabricated from Black Anodized Aluminum

Thorlabs' Mini-Series Kinematic Prism Mount provides kinematic control for prisms, cube beamsplitters, corner cubes, and other optics that require tip and tilt control. The mounting platforms contain three 4-40 (M3) tapped holes for the MPM05(/M) Clamping Arms sold below.

The MK05PM(/M) mount features M2.5 x 0.20 adjusters that can be actuated using a 0.05" (1.3 mm) ball driver or hex key. The HKTS-050 hex key adjuster knobs can also be used. An optional accessory, the F10SC1-5 Locking Collar, is available to lock the adjusters of these two mounts once the desired position is reached.

See the table below for details on the array of mounting holes on the platform of the prism mount.

MK05PM(/M) Specifications
Mounting Platform Adjuster Thread Adjustment Per
Post Mounting Mechanical Drawing
Maximum Deptha Tapped Holesb MK05PM MK05PM/M
0.74" (18.7 mm) 4-40 (M3) (3 Places) M2.5 x 0.20 13.4 mrad 4-40 (M3) Tapped Through Hole (2 Places)
  • The Distance between the Front and Back of the Platform at its Widest Point
  • Taps Provided to Mount the MPM05(/M) Clamping Arm
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
MK05PM Support Documentation
MK05PMMini-Series Kinematic Prism Mount, 4-40 Taps
+1 Qty Docs Part Number - Metric Price Available
MK05PM/M Support Documentation
MK05PM/MMini-Series Kinematic Prism Mount, M3 Taps
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Mini-Series Clamping Arm

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Mechanical Drawing
  • Provide Clamping Force for the MK05PM(/M) Mounts
  • 4-40 (M3) Threaded Hole on Top
  • 4-40 (M3) Threaded Stud on Bottom of Post
  • Maximum Optic Height of 0.23" (6.3 mm)

Thorlabs' Mini-Series Clamping Arm provides clamping force to secure optics to our Mini-Series Kinematic Prism Mount. The MPM05(/M) clamping arm features a 0.37" (9.4 mm) center-to-center distance between the post and the nylon-tipped setscrew that holds the optic. The clamping arm features a 4-40 (M3) thread to mount the arm into the MK05PM(/M) Mount. It can accommodate optics up to 0.23" (6.3 mm) tall if mounted in one of the two 4-40 (M3) tapped holes on the platform of the prism mount. An additional 0.57" (14.5 mm) of height is gained if the clamping arm is mounted in the 4-40 (M3) tapped hole on the back plate of the prism mount. 

The clamping arm is attached to its post using a flexure mechanism that locks with a 5/64" (2.0 mm) balldriver or hex key. The setscrew on top of the clamping arm also accepts a 5/64" (2.0 mm) balldriver or hex key in order to clamp down on the optic. A through hole on the post can be leveraged for added torque when tightening down the post. Please see the diagram to the right for additional information.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
MPM05 Support Documentation
MPM05Mini-Series Adjustable Clamping Arm, 4-40 Threaded Post
+1 Qty Docs Part Number - Metric Price Available
MPM05/M Support Documentation
MPM05/MMini-Series Adjustable Clamping Arm, M3 Threaded Post