Method and system for multiple f-number lens
US11240422B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2020 |
| Grant date | Feb 1, 2022 |
| Priority date | — |
| Expiry date | Apr 10, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An imaging lens includes one or more lens elements configured to receive and focus light in a first wavelength range reflected off of one or more first objects onto an image plane, and to receive and focus light in a second wavelength range reflected off of one or more second objects onto the image plane. The imaging lens further includes an aperture stop and a filter positioned at the aperture stop. The filter includes a central region and an outer region surrounding the central region. The central region of the filter is characterized by a first transmission band in the first wavelength range and a second transmission band in the second wavelength range. The outer region of the filter is characterized by a third transmission band in the first wavelength range and substantially low transmittance values in the second wavelength range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.