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

G - Physics

02

B

73/51, 88/0.1, 8

G02B 26/02 (2006.01) G02B 5/00 (2006.01) G02B 5/20 (2006.01) G02B 17/06 (2006.01) G02B 27/44 (2006.01) H01S 3/00 (2006.01) H01S 3/105 (2006.01)

Patent

CA 1289395

ABSTRACT OF THE DISCLOSURE 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 re- flected 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.

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