Optical: systems and elements – Having significant infrared or ultraviolet property – Lens – lens system or component
Patent
1988-07-06
1996-07-16
Moskowitz, Nelson
Optical: systems and elements
Having significant infrared or ultraviolet property
Lens, lens system or component
359 16, 359 19, G02C 702, G03H 122, G02B 532
Patent
active
055372457
ABSTRACT:
The infra-red diffractive optical lens will remedy chromatism faults and offer excellent compactness; in addition, it does not call for a cooling device. It comprises a first convergent lens made of a material corresponding to the operational infra-red band width considered and a second convergent lens formed by a surface hologram. This hologram is obtained by accurate machining of one of the diopters of the first convergent lens according to machining data optimized by digital calculations. The first lens is preferably made of zinc sulfide. This system can operate simultaneously in the 8 to 12 microns infra-red band and the 1.06 microns laser channel.
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Guizhard, R. C.; "Plastic Lens . . . Control"; Central Engineering, vol. 29, No. 3, pp. 134-142, Feb. 1982.
Moskowitz Nelson
Thomson-C.S.F.
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