Method and system for illumination using laser diode bar and microlenses array of same pitch
US6407849B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 1, 1999 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Jul 1, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A system and a method for illuminating a spatial light modulator, where all the pixels of the SLM are illuminated symmetrically with respect to the optical axis, thus reducing the crosstalk problem. The system includes a linear array of light sources for generating a plurality of light beams, a linear array of microlenses, each of the microlenses receiving light from a corresponding light source of the array of light sources, an optical element for receiving light from the array of microlenses and for redirecting it and a spatial light modulator including an array of pixels for modulating the light. The distance between the array of microlenses and the optical element is such that all the pixels of the SLM are illuminated symmetrically with respect to the optical axis of the optical element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.