Zoom lens systems with wavefront coding
US7710658B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2007 |
| Grant date | May 4, 2010 |
| Priority date | — |
| Expiry date | Aug 5, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/52
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Zoom lens systems and methods for imaging incoming rays over a range of ray angles are disclosed. The incoming rays are characterized by at least phase. The zoom lens system includes an optical axis and is characterized by a plurality of modulation transfer functions (MTFs) corresponding at least to the range of ray angles. The zoom lens system includes an optical group disposed along the optical axis, including at least one variable optical element that has a variable focal length selectable between at least two distinct focal length values. The optical group also includes a wavefront coding element. The wavefront coding element alters at least the phase of the incoming rays, such that the plurality of MTFs corresponding to the range of ray angles, for each one of the two distinct focal length values, are less sensitive to misfocus-like aberrations than a corresponding system without the wavefront coding element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.