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:
Sep. 27, 1988
Filed:
Jul. 09, 1987
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
A distance measuring device for measuring a distance to an object has an LED for projecting a pulse light to the object, photoelectric cells for receiving a reflected pulse light from the object in addition to an ambient light and producing a pulse signal representing the reflected pulse light and a noise signal representing the ambient light, a circuit for generating a level signal which increases as the ambient light becomes brighter, thereby locating the noise signal below the level signal, a comparator for comparing the level signal with the reflected light signal and producing, when the reflected light signal is below the level signal, an infinite signal indicating that the object is located at an infinite distance.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile