Enhanced pixel for wavefront sensing
US9939324B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2016 |
| Grant date | Apr 10, 2018 |
| Priority date | — |
| Expiry date | May 8, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/77
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A wavefront sensing pixel is provided. The wavefront sensing pixel includes a low-pass filter filtering a charge signal from a photodetector and outputting a control signal when low-frequency signals are detected in the charge signal, and a control device to control flow of the charge signal past the control device based on whether a low-frequency signal is detected in the charge signal. The wavefront sensing pixel further includes a low-frequency signal path that receives a flow of signals that flow past the control device, and a high-frequency signal path independent of the low-pass filter and the control device, the high-frequency signal path receiving high-frequency signals included in the charge signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.