Wavefront coding optics
US6842297B2 · kind B2 · utility
153Cited by
96References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 31, 2001 |
| Grant date | Jan 11, 2005 |
| Priority date | — |
| Expiry date | Dec 12, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/46
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Improved Wavefront Coding Optics, which apply a phase profile to the wavefront of light from an object to be imaged, retain their insensitivity to focus related aberration, while increasing the heights of the resulting MTFs and reducing the noise in the final images. Such improved Wavefront Coding Optics have the characteristic that the central portion of the applied phase profile is essentially flat (or constant), while a peripheral region of the phase profile around the central region alternately has positive and negative phase regions relative to the central region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.