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:
Jan. 11, 1983
Filed:
Jun. 13, 1980
Tetsuo Hohki, Ibaraki, JP;
Abstract
A method for stabilizing the intensity of a light beam emitted by a light source and deflected by an acoustooptical deflector element which is controlled by a control signal and is arranged in a scanning exposure head, without regard to deflection angles, wherein a detected light beam intensity is compared with a predetermined reference light intensity. The difference between the light beam intensity and the reference light intensity is detected, and wherein the control signal corresponding to the detected difference is controlled by a stored correction signal which is read out of a memory, so that the intensity of the light beam through the acoustooptical deflector element may be maintained at a certain level.