Silicone rubber surfaces for biometric print TIR prisms

Details Silicone rubber surfaces for biometric print TIR prisms Silicone rubber surfaces for biometric print TIR prisms

2006-02-17

2008-01-15

Shafer, Ricky D. (Department: 2872)

Optical: systems and elements

Prism

C359S833000, C356S071000, C382S115000, C382S127000, C428S425500

Reexamination Certificate

active

07319565

ABSTRACT:
Molded silicone rubber sheets with optical quality surfaces and methods for making the same. The silicone rubber sheets are made by molding liquid silicone rubber in a mold. In embodiments, the mold forms parallel optical quality flat surfaces. In one embodiment, a stiffening plastic is molded in the middle of the silicone rubber sheet between the parallel optical quality flat surfaces. In another embodiment, the mold forms one optical quality flat surface while the surface parallel to the optical quality flat surface is bonded to a prism.

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