Pellicles are transparent polymer films (typically 3 to 5 microns thick) supported on  
   metal frames. We have developed a process that allows us to deposit  high quality
   dielectric layers on them,  enabling  the production of pellicles that function as low
   pass filters, high pass filters and polarizers.

  The advantages of using pellicles instead of components based on glass substrates
  or prisms
are as follows:

  - Very small wavefront distortion in transmission, typically on the order of 1/50th wave
   peak-to-valley in the visible region

  - No change in focal plane position or image shift when pellicle is inserted in optical

  - No introduction of chromatic or spherical aberration

  - Ability to withstand high optical intensities

    Please contact us at (310)-936-0648 or for further

  Three documents concerning applications and properties of pellicles are available  
  on request:

Parylene Pellicles for Space Applications - This gives extensive information on
     Parylene pellicles in particular, and has a section comparing Parylene pellicles
     with pellicles made from other materials.

Solving Design Problems with Pellicles - This is an article describing the
    use of pellicles in various optical systems.

Pellicle Laser Damage Test Report - A document from Martin-Marietta
    describing results of subjecting Parylene  pellicles to high-energy 1064 nm laser
Advanced Pellicle Technology