Apparatus for measuring reflectivity and transmissivity of a specimen
US4125328A · kind A · utility
Inventor
Key dates
| Filing date | Mar 25, 1977 |
| Grant date | Nov 14, 1978 |
| Priority date | — |
| Expiry date | Mar 25, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/59
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for measuring reflectivity or transmissivity of a specimen has a source of light fixed to a base, a variable angle specimen frame receiving the light in a narrow beam and transmitting it or reflecting it, a light receiving unit movable around the specimen receiving frame for receiving the transmitted light or the reflected light through an optical template having groups of transverse opaque portions thereacross and movable transversely of the light coming therethrough. A recorder produces a curve of the intensity of light received by the light receiver from which the degree of transmissivity or reflectivity can be determined in comparison with a similar curve for a perfectly transmitting or reflecting specimen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.