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:
Jan. 21, 1992
Filed:
Dec. 12, 1990
Hiroaki Nakanishi, Nagaokakyo, JP;
Hidehiro Fukumoto, Hirakata, JP;
Kuniharu Shibata, Takatsuki, JP;
Hidetoshi Matsumoto, Kyoto, JP;
Omron Tateisi Electronics Co., Kyoto, JP;
Abstract
In a distance measuring apparatus for optically detecting a distance to an object by using a triangulation method, two signals which are obtained from a position sensitive device are added and it is detected that the result of the addition has exceeded a predetermined threshold level. On the other hand, it is assumed that a signal waveform to drive a light emitting device is a signal whose level increases with an elapse of time. When the addition result exceeds the threshold level, the level of the drive signal is held constant. At this time, by dividing a signal obtained from the position sensitive device by the signal indicative of the addition result, a signal relating to the distance to the object is obtained.