Integrating sphere type standard light source device
US4232971A · kind A · utility
Inventor
Key dates
| Filing date | Mar 22, 1979 |
| Grant date | Nov 11, 1980 |
| Priority date | — |
| Expiry date | Mar 22, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/474
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An integrating sphere type standard light source has a spherical shell the inner surface of which is coated with a white coating having a high reflectivity. The shell has a light source aperture in the top thereof, a viewing aperture in the side thereof and a specimen exposure aperture in the bottom thereof. A light source is mounted in the light source aperture and depends into said shell and includes a source of light and a light shielding plate between the source of light and the remainder of the interior of the shell, the light shielding plate also being coated with a white coating having a high reflectivity. A specimen supporting plate is positioned beneath the specimen exposure aperture and is normally positioned for supporting a specimen at the bottommost point of an imaginary spherical surface which is an extension of the internal surface of the shell into the specimen exposure aperture. A specimen supporting plate is mounted for movement into and out of the normal position thereof for placing a specimen to be observed on the specimen supporting plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.