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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 - Typical 0.5l
• Reflected wavefront - Typically better than 1l/inch

Film Specifications

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

Reflection Flatness/Transmitted Wavefront

Using improved manufacturing techniques NPC now provides Ultraflat Pellicles with up to 1/10l reflection on central areas of smaller diameter pellicles. Better than 1l reflection flatness can be obtained on larger diameter pellicles. The central 75% to 80% central area of a circular pellicle is normally specified as the best area for reflection flatness. Computer reduced interferometer documentation can be provided.

Specially manufactured pellicles with transmitted wavefronts of better than 1/10l are available. Thickness uniformity of one fringe over large areas is also available. Computer reduced interferometer documentation can be provided.

IR Pellicle Applications

Minimal loss (typical 50/50 R/T Ave.) beamsplitting pellicles are available for selected bandwidths within the 700nm to 5µ range. Coatings can be altered for different states of polarization as well as for single wavelength applications.