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. 23, 1996
Filed:
Feb. 14, 1994
Toru Suzuki, Kanagawa, JP;
Digital Stream Corporation, Kanagawa, JP;
Abstract
An optical-type position and posture detecting device includes at least two light sources. The two light sources are disposed at a predetermined distance. The two light sources are alternately switched over. A light receiving element receives light from each of light sources and detects at least two-dimensional angle with regard to each light source. The posture and position of the light receiving element is calculated on the basis of the predetermined distance and two-dimensional angles. An angle detecting device includes a photodetector having at least two receiving portions. At least one light intercepting plate disposed between two light receiving portions, vertically with regard to light receiving portions. The incident angle of light from a light source falling the photodetector is calculated based on the quantities of light received on each of light receiving portions. The light intercepting plate may be made of a light absorbing material or may be made in the form of a two-surface mirror.