Optical encoder having a transparent lens plate with an array of lenses
US5153437A · kind A · utility
14Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1991 |
| Grant date | Oct 6, 1992 |
| Priority date | — |
| Expiry date | Aug 30, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P3/486
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical encoder is used for detecting the position, speed, acceleration etc. of a moving or rotating object. The optical encoder includes a light source, a collimator lens for collimating a light emitted from the light source, a transparent lens plate having an array of lenses formed therein at regular intervals, and a light detector located on a focal plane of the lenses lying on the side opposite to the collimator lens with respect to the lens plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.