| 摘要 |
The device includes a single detector for receiving a light signal and developing an output electrical signal therefrom. A rotating polygon scanner has several reflective facets that receive light from two separate optical systems and direct the light onto the facets of the scanner at positions offset by onehalf the facet angle such that the light beams alternately strike a facet and the juncture between two facets. The reflected light is then directed through a beam splitter onto the detector in an alternating, interleaved sweeping motion. |
