Research/Patents/US 5537245
US 5537245

INFRA-RED DIFFRACTIVE OPTICS APPLICABLE TO A LASER TARGET DESIGNATION SYSTEM

Assignee

THOMSON-CSF

Filed

Jul 6, 1988

Granted

Jul 16, 1996

Location

ORSAY FR

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.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Nov 28, 1988

Rescinded

Oct 11, 1995

Duration

6 years, 10 months

Inventor

  • 1JEAN B. MIGOZZI

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Back to patent indexSource: USPTO 35 USC §181 secrecy order records