Optical measuring device for detecting surface characteristics of object
US4726685A · kind A · utility
11Cited by
9References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1986 |
| Grant date | Feb 23, 1988 |
| Priority date | — |
| Expiry date | Jun 18, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/303
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an optical measuring device including a laser ray source, a polarization prism, an objective lens to condensing parallel ray to the surface of a substance to be measured, and divided photo-sensor means to detect reflected ray, the divided photo-sensor means is two divided photo-sensors, to eliminate noise effect caused by the laser ray source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.