Optical-type position and posture detecting device
US5510893A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 14, 1994 |
| Grant date | Apr 23, 1996 |
| Priority date | — |
| Expiry date | Feb 14, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S3/783
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.