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:
Jul. 02, 1996
Filed:
Dec. 21, 1993
Masahiro Ohishi, Tokyo, JP;
Fumio Ohtomo, Tokyo, JP;
Kazuaki Kimura, Tokyo, JP;
Masaaki Yabe, Tokyo, JP;
Yasutaka Katayama, Tokyo, JP;
Kazushige Koshikawa, Tokyo, JP;
Takeshige Saito, Tokyo, JP;
Kabushiki Kaisha TOPCON, Tokyo, JP;
Abstract
In a light-wave distance meter, a light source device emits reference modulated light beams from multiple spatially-separated light emitting areas, an optical means radiates a light beam derived from the multiple modulated light beams to the target of measurement, a light beam reception means receives the reflected return light beam from the target and converts it into an electrical pulse signal, and a distance measuring means calculates the distance to the target based on the time difference between the light beam emission and the return light beam reception. The low coherence and high intensity light beam produced by the light source device enables the extension of the maximum measurable distance.