Virtual blackbody radiation system and radiation temperature measuring system
US6467952B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2000 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Mar 16, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J5/53
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A virtual blackbody radiation system (10) includes a light-emitting unit (1) including an LED driven by a fixed current, a light-receiving unit (2) including a sapphire rod, and an optical unit (3) including lenses (31, 32) for converging light emitted by the light-emitting unit in a convergent light. A cylindrical member (41)included in the optical unit (3)can be moved along the optical axis by a servomotor (42) included in a focus adjusting unit (4) for positional adjustment. The focus of convergent light relative to the light-receiving unit (2) can be adjusted by moving the lens (32) disposed in the cylindrical member (41) along the optical axis relative to the light-receiving unit (2). The intensity of the convergent light on the light-receiving unit (2) can be adjusted to the intensity of predetermined blackbody radiation. Thus, the virtual blackbody radiation system (10) is able to obtain light of a desired intensity without changing the driving current for driving a light source; consequently, the life time of the light source can be extended and the stability of radiation can be improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.