Method and apparatus for monitoring output signal instability in a light source
US7239385B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2004 |
| Grant date | Jul 3, 2007 |
| Priority date | — |
| Expiry date | Oct 6, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/2866
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A spectrophotometric instrument is comprised of a processor, a probe having a tissue engaging surface with an aperture therethrough and a light source producing measurement light signals and optically coupled to the probe via a first optical path. A partially reflective first reflecting member is located in the probe and has a generally elliptical profile positioned to reflect a first portion of the measurement light signals to the tissue aperture and to transmit a second portion of the measurement light signals through the first reflecting member. A second reflecting member is located in the probe and has a generally elliptical profile positioned to reflect the measurement light signals transmitted through the first reflecting member. A second optical path has a distal end positioned to receive the measurement light signals reflected off of the second reflecting member and a proximal end coupled to the processor. A third optical path has a distal end positioned in the probe to receive light signals transmitted through the tissue sample and a proximal end coupled to the processor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.