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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.

Deep UV Pellicle

NPC now has a new Pellicle film with excellent transmission properties in the 200nm to 400nm range. This has opened a new area for Pellicle applications as windows and beamsamplers as well as possibilities for beamsplitting applications.