Nonlinear optical protection against frequency agile lasers

Details Nonlinear optical protection against frequency agile lasers Nonlinear optical protection against frequency agile lasers

1988-08-04

1990-03-20

Laroche, Eugene R.

350 9627, 350 9632, 350330, G02F 101

Patent

active

049096095

ABSTRACT:
An eye protection or equipment filter device for protection from laser eny is disclosed. The device may be in the form of a telescope, binoculars, goggles, or constructed as part of equipment such as image intensifiers or range designators. Optical elements focus the waist of the beam within a nonlinear frequency-doubling crystal or nonlinear optical element or fiber. The nonlinear elements produce a harmonic outside the visible spectrum in the case of crystals, or absorb the laser energy in the case of nonlinear fibers. Embodiments include protectors for the human eye as well as filters for sensitive machinery such as TV cameras, FLIR systems or other imaging equipment.

REFERENCES:
patent: 3620597 (1971-11-01), Schwartz et al.
patent: 4176919 (1979-12-01), Rast, Jr.
patent: 4515429 (1985-05-01), Smith et al.
patent: 4776677 (1988-10-01), Park et al.

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