Large-aperture, digital micromirror array-based imaging system
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United States of America Patent
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May 15, 2001
Grant Date -
N/A
app pub date -
May 19, 2000
filing date -
May 20, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and method disclosed herein can be utilized in all DMA-based optical systems, such as imaging and projection devices, in order to improve light efficiency and brightness by a significant factor and maintain good contrast. This feature is especially important in night vision systems and other low light applications. A means is provided of masking a designated area of light collected by the system objective lens in order to eliminate light collected from 'flat' or 'off' state micromirrors that would degrade the image quality produced. The masked objective lens, with a larger aperture, enhances the light collection from micromirrors in the 'on' state only.
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