Gray optical standard
US7193701B2 · kind B2 · utility
1Cited by
15References
32Claims
0Family size
Inventor
Key dates
| Filing date | Jul 29, 2005 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | Nov 10, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/278
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for providing and using a gray optical standard is disclosed, the standard generally comprising a housing having a cavity and an at least partially transparent portion adjacent to the cavity for receiving the radiation emitted radiation by an optical instrument and a particulate material disposed in the cavity. The particulate material is a mixture of highly absorptive and highly reflective particles having a diameter of about 20 microns or less. In some embodiments, the at least partially transparent portion of the housing is modified to be highly diffusely scattering in the wavelength region of interest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.