| 摘要 |
PROBLEM TO BE SOLVED: To provide micromirrors to minimize light diffraction along the direction of switching and more particularly light diffraction into the acceptance cone of a collection optics. SOLUTION: In the present invention, a light source is placed orthogonal to the rows (or columns) of an array, and/or the light source is placed orthogonal to a side of the frame defining the active area of the array. An incident light beam, though orthogonal to the sides of the active area, is not however, orthogonal to any substantial portion of sides of the individual micromirrors in the array. Orthogonal sides cause incident light to diffract along the direction of micromirror switching, and result in minimum light leakage into 'on' state even if the micromirrors are in the 'off' state to thereby improve a contrast ratio. COPYRIGHT: (C)2005,JPO&NCIPI
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