Light returning target for a photometer
US7411668B2 · kind B2 · utility
3Cited by
10References
33Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 26, 2005 |
| Grant date | Aug 12, 2008 |
| Priority date | — |
| Expiry date | Jul 21, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/31
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A light returning target for a photometer. The light returning target comprises a ball lens, and a cradle. The cradle has a hemispherical receptacle in which the lens is intimately received. Preferably, the lens is formed of fused silica, the receptacle is polished sufficiently to reflect, more than it scatters, light, and at least the surface of the receptacle is formed of a material that absorbs, more than it reflects, light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.