Infrared lens, infrared camera, and night vision

Details Infrared lens, infrared camera, and night vision Infrared lens, infrared camera, and night vision

2011-01-31

2011-12-27

Consilvio, Mark (Department: 2872)

Optical: systems and elements

Having significant infrared or ultraviolet property

Lens, lens system or component

C359S792000

Reexamination Certificate

active

08085465

ABSTRACT:
An infrared lens1aincludes first to third lenses L1to L3which are made of zinc sulfide and arranged in this order from an object side. Each of the first to third lenses L1to L3is configured as a positive meniscus lens of which convex surface is opposed to the object. The lenses L1to L3are formed by heat-press molding raw powder of zinc sulfide using a lens-shaped mold. In addition, a concave surface (the surface opposed to the image side) of the first lens L1is formed as a diffractive surface.

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