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:
Nov. 20, 2001
Filed:
Aug. 06, 1999
Naotaro Nakata, Kyoto, JP;
Akihisa Yoshida, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
An optical system includes a semiconductor laser. The semiconductor laser is accommodated within a case. The case is formed with a window to pass through laser light emitted from the semiconductor laser. The laser light passed through the window comes to a collimator lens. Between semiconductor laser and the collimator lens is provided a light shield member having a pinhole to pass through the laser light having passed the window. Laser light made in a parallel luminous flux is outputted from the collimator lens. This laser light is deflected toward a main scanning direction by a deflector and further collected on a scanning surface by a light collector.