The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 1984
Filed:
Dec. 27, 1982
David E Doggett, Cupertino, CA (US);
Benson, Inc., Mountain View, CA (US);
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.