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Pellicle Technical Information

Photonics MarketplaceTwo of the most important attributes of pellicles are the elimination of secondary (ghost) reflection and the elimination of beam displacement and refractive error on transmission. Critical flatness and transmission specifications can be met with interferogram documentation. These attributes combined with a large variety of standard and custom coatings including minimal loss and dichroic coatings make pellicles an attractive option to provide increased flexibilty in optical system design.

General Specifications
   •  Membrane material - Nitrocellulose
   •  Temperature range - -40° C to 125°C
   •  Index of Refraction - 1.5
   •  Surface Quality - Better than 40/20
   •  Average 8/92 R/T Uncoated
   •  Transmitted Wavefront typically better than 0.5 wave.
   •  Reflected Wavefront typically better than 1 wave/inch.

Film Specifications
   •  Standard Thickness/Standard Quality (ST-SQ)
   •  5µm (0.0002") ±10% Thickness Uniformity ‹ 4 fringes/inch (2 waves/inch)
   •  Standard Thickness/Laser Quality (ST-LQ)
   •  5µm (0.0002") ±10% Thickness Uniformity ‹ 1 fringe/inch (0.5 waves/inch)
   •  Extra Thin Pellicles (ETP)
   •  2µm (0.00008") ± 10% Thickness Uniformity ‹ 1 fringe/inch (0.5 waves/inch)
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