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:
Feb. 19, 2008
Filed:
Aug. 31, 2004
Optical velocimeter, displacement information measurement device and conveying and processing device
Hideo Wada, Nara, JP;
Hisakazu Sugiyama, Takarazuka, JP;
Takayuki Taminaga, Nara, JP;
Hajime Kashida, Nara, JP;
Hideo Wada, Nara, JP;
Hisakazu Sugiyama, Takarazuka, JP;
Takayuki Taminaga, Nara, JP;
Hajime Kashida, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
There is provided an optical velocimeter for achieving miniaturization and lower power consumption thereof and for accurately detecting two-dimensional travel velocity of a measured object. This optical velocimeter includes a light-emitting element, a diffraction grating, two light-receiving sections, and a signal processing circuit. Light emitted from the light-emitting element is branched by the diffraction grating into three light fluxes, and optical axes of the divided light fluxes are intersected one another on the measured object to form one detection point. Scattered light from the detection point frequency-shifted by travel of the measured object is then received by the two light-receiving sections, and a light-reception signals outputted from the light-receiving sections are processed in the signal processing circuit to detect travel velocities of two directions of the measured object.