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:
Feb. 22, 1994
Filed:
Oct. 22, 1992
Applicant:
Inventor:
Kazuhiko Matsuoka, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
359496 ; 369110 ;
Abstract
An optical head using a semiconductor laser array as a light source comprises a semiconductor laser array in which a plurality of semiconductor lasers are linearly arrayed, a collimator lens, an objective lens and a beam shaping prism system. The beam shaping prism system is arranged between the collimator lens and the objective lens to convert a beam width of a beam emerged from the collimator lens. The junction surfaces of the semiconductor lasers are parallel with an array direction. A plane defined by incident and emerging beams on and from the beam shaping prism system is parallel with or overlapping the array direction of the semiconductor lasers.