Multichannel spectrophotometer using linear variable filter sensor
US12174069B2 · kind B2 · utility
Inventors
Key dates
| Filing date | May 5, 2021 |
| Grant date | Dec 24, 2024 |
| Priority date | — |
| Expiry date | Sep 12, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/1239
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A multichannel color measurement instrument for measuring spectral properties of a target comprises pick-up optics to collect measurement light, first and second anamorphic optical paths optically coupled to the pick up optics, a pick-up polarizing element located to polarize measurement light in the second anamorphic optical path, a reference anamorphic optical path including a reference illumination source, and a two-dimensional variable filter sensor having an optically transmissive filter function that varies in a first direction parallel to a surface of the variable filter sensor and is substantially constant in a second direction parallel to a surface of the variable filter sensor and orthogonal to the first direction. The anamorphic optical paths spread the measurement light in the first direction direct it on to different portions of the variable filter sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.