Optical readhead
US4632559A · kind A · utility
72Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 21, 1985 |
| Grant date | Dec 30, 1986 |
| Priority date | — |
| Expiry date | Feb 21, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/064
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Reflectance apparatus is disclosed for obtaining measurement of nonspecular reflected light in which controlled light rays are directed by means of a lens and transmission path from a light source through a light trap to expose or illuminate a specimen and nonspecular reflected light is passed from the specimen through the light trap along a transmission path to one or more detectors where the nonspecular reflected light is measured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.