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. 11, 2001
Filed:
May. 12, 1999
Tomohiro Tanaka, Kawasaki, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A lightwave distance measuring apparatus having a coaxial light-transmitting/receiving type optical system is provided with light-transmitting means for transmitting pulsed light toward an object, light-receiving means for receiving reflected pulsed light reflected by the object, a time measuring section for measuring a period of time from when the pulsed light is transmitted until the light is received, a distance measuring section for determining a distance to the object from the measured period of time, and a pulse number detecting section for detecting whether the number of received pulses of reflected light in response to one transmitting pulsed light is one or more; while the value measured when only one pulse of the reflected light is detected by the pulse number detecting section in response to the transmission of pulsed light is made effective.