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:
Mar. 15, 1994
Filed:
May. 24, 1993
Applicant:
Inventors:
Kunihiko Omura, Toyokawa, JP;
Akiyoshi Hamada, Toyokawa, JP;
Satoru Ono, Toyokawa, JP;
Hiromu Nakamura, Toyokawa, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J / ; H04N / ;
U.S. Cl.
CPC ...
346408 ;
Abstract
A laser source unit in which a laser diode is located at a focal point of a Fresnel lens using refraction and diffraction. The laser diode emits a laser beam in accordance with a control signal generated by a driving circuit. The laser diode is driven such that defocus on an image surface caused by a rise in the temperature of the laser diode can be kept in a tolerable degree.