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. 22, 1991
Filed:
Sep. 07, 1989
Shinichi Ota, Tokyo, JP;
Keiichi Kawasaki, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention provides a laser irradiating apparatus which comprises a laser which can be directly modulated by a modulation signal, and in which laser oscillation becomes unstable when the intensity of the modulation signal is smaller than a predetermined threshold value, and laser oscillation becomes stable when the intensity of the modulation signal is larger than the predetermined threshold value, means for comparing the intensity of the modulation signal with a predetermined value near the predetermined threshold value, and means for modulating an emission time of the laser when the intensity of the modulation signal is smaller than the predetermined value.