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:
Mar. 01, 2011
Filed:
Jul. 03, 2006
Hiroshi Sakai, Yokohama, JP;
Hiroshi Sakai, Yokohama, JP;
Nikon Vision Co., Ltd., Tokyo, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A distance measuring apparatus, which can achieve reduction in cost and size and perform measurement ranging from short-distance to long-distance accurately, includes an unit outputting first pulsed light Lto a measurement object, an unit detecting first pulsed light Lreflected by the measurement object to output a signal responsive to an intensity variation thereof, a measuring unit measuring a time difference between output and detection of the first pulsed light during a period when an intensity of the signal is larger than a predetermined value, a measuring unit measuring the time difference at a time when an intensity of the signal varies from less than a predetermined value to the predetermined value or more, and an unit calculating a distance to the measurement object using a time difference measured by at least one of the two measuring units.