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. 17, 1996
Filed:
Mar. 01, 1994
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A velocity information detecting apparatus detects velocity information of a moving object. The apparatus is provided with a light source for emitting a coherent beam, a beam splitting member for splitting the beam from the light source into a plurality of beams to irradiate the object thereby, and a photodetector for receiving scattered light from the object. The velocity information of the object is detected, based on a Doppler shift of the scattered light detected by the photodetector. The plurality of beams irradiate the object disposed in a region before the plurality of beams are spatially separated from each other. The beam splitting member may be either a diffraction grating or a prism member. The diffraction grating may be a lamellar phase grating or a blazed diffraction grating. The prism member may be a roof prism.