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:
Aug. 28, 1990
Filed:
May. 11, 1989
Tomohiro Nakajima, Matsudo, JP;
Kazuyuki Shimada, Chofu, JP;
Nobuo Sakuma, Inagi, JP;
Seizoh Suzuki, Tokyo, JP;
Katsumi Yamaguchi, Fuchu, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A semiconductor laser source unit includes a semiconductor laser chip emitting a laser beam, a base member supporting the semiconductor laser chip, and a protection cover mounted on the base member so as to seal the semiconductor laser chip. The protection cover has a lid portion formed at an end thereof and an opening at an opposed end thereof facing the base member. The lid portion has a window. The semiconductor laser source unit also has a single aspherical lens fastened to the lid portion of the protection cover so as to cover the window formed in the lid portion. The single aspherical lens collimates the laser beam emitted from the semiconductor laser chip.