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:
Oct. 16, 2007
Filed:
Oct. 14, 2005
Jun Xu, Hefei, CN;
Tianpeng Zhao, Hefei, CN;
Hai Ming, Hefei, CN;
Jianping Xie, Hefei, CN;
Deyong He, Hefei, CN;
Liang LV, Hefei, CN;
Huaqiao Gui, Hefei, CN;
BO Yi, Hefei, CN;
Lei Guo, Hefei, CN;
Craig S. Ranta, Redmond, WA (US);
Yuan Kong, Kirkland, WA (US);
Jun Xu, Hefei, CN;
Tianpeng Zhao, Hefei, CN;
Hai Ming, Hefei, CN;
Jianping Xie, Hefei, CN;
Deyong He, Hefei, CN;
Liang Lv, Hefei, CN;
Huaqiao Gui, Hefei, CN;
Bo Yi, Hefei, CN;
Lei Guo, Hefei, CN;
Craig S. Ranta, Redmond, WA (US);
Yuan Kong, Kirkland, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
A laser range finder includes a laser and a photosensitive element. The laser projects a beam onto a target surface. A backscattered portion of the laser beam returns to the laser from the target surface and enters the laser emitting cavity. Variations in laser output power are detected by the photosensitive element, which provides a 'beat' signal to a frequency detection circuit. The frequency detection circuit includes a difference frequency analog phase locked loop (DFAPLL) providing a purified form of the beat signal. The frequency of the purified beat signal is determined and used to calculate distance to the target surface.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile