Holographic scanner spinner wobble correction system

Details Holographic scanner spinner wobble correction system Holographic scanner spinner wobble correction system

1982-12-27

1984-10-23

Arnold, Bruce Y.

350 67, G02B 2717

Patent

active

044784805

ABSTRACT:
An optical laser scanning system includes a hologram spinner disc (32) having diffraction grating facets (33) around its periphery. The spinner is susceptible to wobble and translational movement of the facets with respect to a plane perpendicular to the disc axis (35). Corrective means (37) in the form of a ray converging element (37) are provided to collect parallel diffracted rays from the facets in translated positions of wobble and converge such rays to a spacial spot scan (38) on an imaging surface (40). By orienting the spinner such that the diffracted light beam makes a 90.degree. angle with the incident light beam and then providing a parabolic cylinder to direct and focus the diffracted light beam on the imaging surface, the effects of both translational and angular wobble on the image formed are eliminated.

REFERENCES:
patent: 3897132 (1975-07-01), Meeussen et al.
patent: 4067639 (1978-01-01), Kramer
patent: 4094576 (1978-06-01), Heiling
patent: 4239326 (1980-12-01), Kramer
patent: 4243293 (1981-01-01), Kramer
patent: 4289371 (1981-09-01), Kramer
patent: 4304459 (1981-12-01), Kramer

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