Optical holographic scanner

Details Optical holographic scanner Optical holographic scanner

1987-03-20

1988-05-31

Corbin, John K.

350320, G02B 532, G02B 2610, G03H 104

Patent

active

047476460

ABSTRACT:
A holographic disc for use in a spot scanning system is formed with diffractive gratings having optical power incorporated therein, thereby eliminating the need for an f-theta lens between the disc and the scanning plane. The disc is formed by rotating it at high speeds to achieve gyroscopic stability and then exposing a recording medium to short pulse superimposed wavefronts, one of which imparts optical power to the grating being formed. The gyroscopic stabilization insures that each grating is located exactly the same radial distance from the disc axis.

REFERENCES:
patent: 3561839 (1971-02-01), McClung et al.
patent: 4289371 (1981-09-01), Kramer
patent: 4508421 (1985-04-01), Herloski

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