| 摘要 |
<p>An imaging system is disclosed including a first illumination source (10) for producing a first illumination field, a modulation system (14) for modulating the first illumination field, and an optical imaging system (16,20,21,22,50) for directing the modulated illumination field to an imaging surface (18) along a first optical path. In accordance with an embodiment, the imaging system includes a second illumination source (26) for producing a second illumination field, a first sub-assembly (32,34), a second sub-assembly (36,38,40) and a control assembly. The first sub-assembly (32,34) is for directing the second illumination field toward the imaging surface (18) along a second optical path that is different than and non-parallel with said first optical path. The first sub-assembly (32,34) includes a beam splitter sub-assembly (120,122) that includes a beam splitter and at least one lens. The second sub-assembly (36,38,40) is for receiving a portion of the second illumination field from the imaging surface, and includes a lens and a sensor for producing a sensor output signal. The control assembly is for adjusting a focal point (96,100,104,108) of the optical imaging system responsive to the sensor output signal (S1+S2,S3+S4). <IMAGE></p> |
