Dual infrared band objective lens
AssigneeLockheed Martin Corporation
InventorMax Amon
Life of this patent
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Abstract
An infrared refractive lens triplet having color correction properties for radiation within the 3 to 12 micrometer spectral band for use with a quantum well detector for simultaneous dual band imagery. In certain embodiments of the invention, two widely spaced triplets form a Petzval-type objective lens. Each lens triplet is made up of a negative zinc sulfide lens, a positive zinc selenide lens, and a negative gallium arsenide lens coaxially positioned along a chief ray of the lens system.
Claims16
An optical lens system simultaneously focusing light in both the 3-5 and 8-12 microwave spectral bands onto a single focal plane, comprising:
- a first, negative zinc sulfide lens,
- a second, positive zinc selenide lens, and
- a third, negative gallium arsenide lens,
- each of said first through third lenses being positioned along a chief ray and capable of simultaneous dual band imagery in both the 3-5 and 8-12 micrometer spectral bands.
An optical detection system comprising:
- a lens system simultaneously focusing light in both the 3-5 and 8-12 microwave spectral bands onto a single focal plane, wherein said lens system includes:
- a first, negative zinc sulfide lens,
- a second, positive zinc selenide lens, and
- a third, negative gallium arsenide lens,
- each of said first through third lenses being positioned along a chief ray and capable of simultaneous dual band imagery in both the 3-5 and 8-12 micrometer spectral bands;
- and
- a detector located at said single focal plane.
Dependencies are inferred from the claim text.