Method of fabricating a controlled harmonic binary grating

Details Method of fabricating a controlled harmonic binary grating Method of fabricating a controlled harmonic binary grating

1984-10-26

1986-10-21

Arnold, Bruce Y.

350320, G02B 518

Patent

active

046182144

ABSTRACT:
A method of fabricating a controlled harmonic grating having both binary magnitude and phase transmissions in which specified harmonics are enhanced and/or suppressed. The summing of a number of binary pulse trains produces a controlled harmonic grating transmission function. The binary grating is readily fabricated by applying strips of light blocking material corresponding to the occurrence of a zero value of the transmission function, and by forming light-transmissive strips coincident with the portions of the transmission function having an absolute value of 1. Strips of phase retarding material are also deposited having a relative phase shift of pi radians.

REFERENCES:
patent: 4184746 (1980-01-01), Coale

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