Device for measuring stimulus values of the color of a liquid
US3998551A · kind A · utility
Inventor
Key dates
| Filing date | Nov 20, 1975 |
| Grant date | Dec 21, 1976 |
| Priority date | — |
| Expiry date | Nov 20, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/8507
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for measuring three stimulus values of the color of a liquid as a way of determining the color of the liquid. The device has an optical part having a source of light, an integrating ball having an inlet for light and three light receiving elements therein, and a light path switching device at the inlet. An immersible detector has a reflected light detector and a transmitted light detector as a part thereof, the reflected light detector having an opening therein and a flat transparent element covering the opening. The transmitted light detector is spaced from and aligned with the opening in the reflected light detector. A reflected light receiver in the reflected light detector is positioned to receive light reflected from the transparent element at an angle of 45.degree. thereto. Optical fibers are connected between the source of light and the reflected light detector for directing light into the reflected light detector perpendicularly to the transparent element and between the reflected light receiver and the light path switching device and between the transmitted light detector and the light path switching device, respectively. A measuring device is electrically coupled…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.