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:
Apr. 24, 2007
Filed:
Dec. 27, 2002
Shumpei Kameyama, Tokyo, JP;
Yoshihito Hirano, Tokyo, JP;
Kimio Asaka, Tokyo, JP;
Toshiyuki Ando, Tokyo, JP;
Atsushi Okamura, Tokyo, JP;
Toshio Wakayama, Tokyo, JP;
Hiroshi Sakamaki, Tokyo, JP;
Shumpei Kameyama, Tokyo, JP;
Yoshihito Hirano, Tokyo, JP;
Kimio Asaka, Tokyo, JP;
Toshiyuki Ando, Tokyo, JP;
Atsushi Okamura, Tokyo, JP;
Toshio Wakayama, Tokyo, JP;
Hiroshi Sakamaki, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokoyo, JP;
Abstract
A laser radar apparatus includes a mixerfor converting the frequency of an electric signal outputted from a photodetectorinto a baseband frequency by using a modulating signal generated by an oscillator. The laser radar apparatus carries out a coherent integral of the electric signal whose frequency has been converted by the mixer, and measures the quality of scatterers which exist in the atmosphere from a result of the integral. As a result, even when the S/N ratio of the light signal received by a receiving optical unitis low, the laser radar apparatus can detect the quality of the scatterers.