Light source, optical window, and detector configuration for measurement of a medium
US6462350B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 3, 2000 |
| Grant date | Oct 8, 2002 |
| Priority date | — |
| Expiry date | Feb 3, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/53
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention concerns an opto-electronic sensor, in particular for the measurement of opaqueness in a medium, having a transmitter channel (6) irradiating light waves along a first axis (20) and with at least one receiver channel (8, 10) which detects light waves interacting with the medium and which cooperates within an evaluation unit. In order to optically isolate the transmitter and receiver channels from each other, the sensor is configured in such a fashion that a common window (12) made from an optically transparent material is provided for sealing the transmitter channel (6) and the receiver channel (8, 10) with respect to the medium to be measured and for coupling in and coupling out the light waves. The inner border surface (16) of the window (12) facing the receiver channel (8, 10) is adjacent to an optically thinner medium and is oriented relative to the outer border surface (14) of the window (12) directly adjacent to the medium to be measured and with respect to the orientation of the first axis (20) relative to this outer border surface (14), in such a manner that light waves (D-TR) from the transmitter channel (6) which are reflected back into the window (12) from …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.