Anamorphic illumination optics for a MEMS spatial light modulator
US11333894B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 2019 |
| Grant date | May 17, 2022 |
| Priority date | — |
| Expiry date | Mar 11, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/0085
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A system including two dimensional, microelectromechanical system (MEMS) based spatial light modulators and anamorphic optics for improved contrast is provided. Generally, the system comprises an array of modulators having a plurality of pixels along a longitudinal axis, each pixel comprising a plurality of modulators along a transverse axis of the array. An illumination source including a laser and anamorphic optics for focuses light from the laser onto the array, and imaging optics focus modulated light from the array onto an image plane. The anamorphic optics are configured to provide a transverse numerical aperture (NA) along the transverse axis of the array that is smaller than a diffraction angle of the modulated light reflected from the array along a transverse axis of the image plane, and a longitudinal NA along the longitudinal axis of the array that is greater than the transverse NA. Other embodiments are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.