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:
Dec. 04, 1979
Filed:
Jun. 07, 1978
Robert C Kocher, Harvard, MA (US);
Alfred Piorkow, Sudbury, MA (US);
GTE Laboratories Incorporated, Waltham, MA (US);
Abstract
Three scanners are disclosed; common to all is an argon ion laser. In the first two versions, light passes through a telescope, which is provided to expand and collimate the laser beam, through a servo-driven iris whose function is to adjust the length of the slit image to be formed by the optics. The beam enters a rotating cradle, passes through a cylindrical lens, and strikes a galvanometer-driven mirror. Rotating the galvanometer about its axis deflects the image of the laser beam on the main scanning mirror. A second lens images the galvanometer mirror onto the CRT panel. In the first version, the main scanning mirror is a flat reflector; in the second version, the scanning mirror is either a prism or a mirror set at 45 degrees to the incident laser beam. In both versions, a motor-driven optical rotator is between the galvanometer-driven mirror and the scanning mirror. Several important features include the servo-driven image rotator and the motor-driven iris. In the third version, the optical rotator has been replaced by a motor-driven rotating mount for the cylindrical lens. The servo-driven iris has been replaced by a simple aperture, preferably elliptical or rectangular-shaped mounted coaxially to the cylindrical lens. The second lens has been replaced by a pair of adjustable diverging-converging lens. The main scanning mirror is linkage driven by a D.C. motor rather than directly coupled to the motor shaft.