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. 03, 1992
Filed:
Jan. 03, 1991
Minoru Ohshima, Ibaraki, JP;
Shuichi Morio, Ibaraki, JP;
Susumu Saitoh, Ibaraki, JP;
Osamu Namikawa, Ibaraki, JP;
Kazutoshi Obara, Ibaraki, JP;
Minoru Seino, Ibaraki, JP;
Takeshi Mochizuki, Ibaraki, JP;
Makoto Nakura, Ibaraki, JP;
Akira Arimoto, Tokyo, JP;
Masuo Kasai, Tokyo, JP;
Hitachi Koki Co., Ltd., Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A beam position control apparatus in which a light beam is led into a light detector from a light generating source through a movable reflector and positioning of the light beam is performed by a servo control circuit for feeding a signal from the light detector back to the movable reflector, comprises: an oscillator for oscillating in response to an initializing signal and moving the movable reflector to move the beam onto the light detector; and a control switch for separating the oscillator and the movable reflector from each other in response to the signal from the light detector, the oscillator and the control switch being arranged in the servo control circuit.