Gloss sensor having dirt buildup compensation apparatus and method
US6507403B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 2001 |
| Grant date | Jan 14, 2003 |
| Priority date | — |
| Expiry date | Jul 16, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/57
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gloss sensor is described for optically measuring the gloss of a surface and compensating for dirt buildup on the sensor. The gloss sensor includes a light source and a first collimator for receiving light energy from the light source, forming therein and emitting therefrom a collimated light beam. A first detector is located within the first collimator for developing a reference signal and a beam splitter disposed adjacent the first end of the first collimator for dividing the collimated beam into a first beam and a second beam, the second beam being received by a reflection device. A first mirror is positioned adjacent a first window, the first mirror adapted to reflect the first beam onto a surface to be measured through the first window and further adapted to receive the second beam reflected from the reflection device. A second mirror is positioned adjacent a second window, the second mirror receiving the first beam reflected from the surface to be measured through said second window and the second beam reflected by the first mirror through the first and second windows, the second mirror positioned at and angle to reflect the second beam back to the reflection device. A seco…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.