Method and apparatus for measuring gloss which correlates well with visually estimated gloss
US4613235A · kind A · utility
Inventor
Key dates
| Filing date | Feb 13, 1985 |
| Grant date | Sep 23, 1986 |
| Priority date | — |
| Expiry date | Feb 13, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/57
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for measuring the gloss of a surface of a material by receiving light reflected from the surface and measuring the amount of light. Parallel light rays from a light source are directed against the surface the gloss of which is to be determined at an angle of incidence, and a cross-section of light rays reflected from the surface at an angle of reflection equal to the angle of incidence is received and the central region of the cross-section of the light rays is blocked out by a light intercepting plate, so that only the light received after the blocking out of the central region is used as a determination of the gloss of the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.