Recursive optical filter system

Details Recursive optical filter system Recursive optical filter system

G - Physics

02

B

88/114, 349/48

G02B 5/22 (2006.01) G06G 9/00 (1985.01)

Patent

CA 1231432

Abstract Of The Disclosure An optical notching or filtering system in which a beam or optical radiation is passed through the optical filtering means a multiplicity of times. The optical filtering means has an optical Fourier transform means, a spatial filter, optical inverse Fourier transform means, and a reflector array. After an input optical signal beam undergoes a filtering pass by being directed through the transform means, the filter, and the inverse tranform means, the reflector array re-introduces the beam for a multiplicity of subsequent filtering passes. Four embodiments of the system of the invention having various configurations of the reflector arrays for use with one-and two-dimensional spatial filters are disclosed. The various embodiments are set forth as being used in a heterodyning optical notching filter system.

473694

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