Fixed Pellicle Mounts

  • Mount Ø1/2", Ø1", and Ø2" Pellicles
  • Locates Pellicle Over the Center of Mounting Hole
  • Mounting Slots for Easy Pellicle Placement

Pellicle Mount Slots

#8 (M4) Cap Screw Counterbore




Application Idea

BP108 Pellicle Beamsplitter Post Mounted Using a BP107 Fixed Pellicle Mount

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  • Designed to Mount 3/16"-Thick (4.8 mm) Pellicle Beamsplitters
  • Post-Mountable Design Centers Pellicle About Axis of Rotation
  • Three Models Offered:
    • BP057: Mounts Ø1/2" Pellicle Beamsplitters
    • BP107: Mounts Ø1" Pellicle Beamsplitters
    • BP207: Mounts Ø2" Pellicle Beamsplitters
  • Two 2-56 Cap Screws Provided for Mounting Pellicle

These fixed pellicle beamsplitter mounts are a compact and unobstrusive solution when kinematic tip and tilt of the pellicle are not required (see our Kinematic Pellicle Mounts). The post mountable design features an 8-32 (M4) counterbore directly under the optical surface of the pellicle in order to provide a gimbal-like motion when manually rotating an assembly in a post holder.

Thorlabs' Pellicle Beamsplitters are conveniently "dropped into" the mount via slotted supports. This feature helps prevent damage to the extremly delicate pellicle membrane as a result of excess handling. Secure the pellicle's position using the two 2-56 cap screws included with the mount.

Posted Comments:
Jerry Zhao  (posted 2024-05-13 13:51:45.27)
Hardware package only contained a 1 instead of 2 pellicle mounting small screws.
cdolbashian  (posted 2024-05-21 12:31:07.0)
Thank you for contacting us with this feedback. I have reached out to you to provide the adequate replacement hardware. For future damaged or missing parts within shipments, please feel free to reach out to your local support team at
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
BP057 Support Documentation
BP057Ø1/2" Fixed Pellicle Mount
BP107 Support Documentation
BP107Mounting Fork for Ø1" Pellicle Beamsplitters
BP207 Support Documentation
BP207Mounting Fork for Ø2" Pellicle Beamsplitters