Method, apparatus and computer program product for sensing of visible spectrum and near infrared spectrum
US9383259B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2014 |
| Grant date | Jul 5, 2016 |
| Priority date | — |
| Expiry date | Aug 22, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/323
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In accordance with an example embodiment a method, apparatus and computer program product are provided. The method comprises filtering incident light by an IR cut-off filter to generate filtered light. The IR cut-off filter comprises a plurality of pixels with pass-band characteristics for visible light wavelengths and is configured to perform stop-band attenuation of near infrared (NIR) wavelengths. The stop-band attenuation is configured to vary based on spatial location of pixels within the IR cut-off filter. The filtered light received from the IR cut-off filter is sensed by the image sensor to generate sensed light. A baseband signal and a modulated NIR signal are determined by performing transformation of the sensed light. A NIR spectrum associated with the incident light is determined by demodulating the modulated NIR signal. A visible spectrum associated with the incident light is determined based on the NIR spectrum and the baseband signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.