High energy laser beam replica producing method and system

Details High energy laser beam replica producing method and system High energy laser beam replica producing method and system

1987-01-30

1988-05-24

Corbin, John K.

350169, 350602, 350620, G02B 700, G02B 2710, G02B 508, G02B 510

Patent

active

047462051

ABSTRACT:
An attenuated fiducial replica of the far field pattern of a high energy laser beam is obtained by a system and method wherein a first fraction of an incident high energy beam is deflected from one reflective surface of a holey plate and the diffracted orders of the beam are transmitted from the holes to a concave reflector, which reflects diffracted orders toward an opposite reflective surface of the holey plate. A zinc selenide partially reflective member is disposed on-axis between the rear reflective surface and the concave surface for re-reflecting successive fractional portions of the reflected beam a selected number of times to attenuate the beam converging upon a focal plane from an effective focal distance greater than the physical length of the optical system.

REFERENCES:
patent: 2916966 (1959-12-01), Nomarski et al.
patent: 3584937 (1971-07-01), Nishimoto
patent: 3614449 (1971-10-01), Ward, III
patent: 3748015 (1973-07-01), Offner
patent: 3858046 (1974-12-01), Cubalchini
patent: 4475793 (1984-10-01), Ford

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