| 摘要 |
<p>An imaging system includes a first off-axis illumination source for providing a first illumination field (30) at a surface of an illumination modulator (32) such that when the modulator (32) is in a first non-activated mode a zero-order reflected illumination field (34) is directed toward a first illumination blocking device (36), and when the modulator (32) is in a second activated mode one first order reflected illumination field (40) is directed toward the imaging surface (38) while another first order reflected illumination field (42) is directed toward a second illumination blocking device (44).
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