| 摘要 |
A deflector is provided which comprises a array of rotating lenses (30, 56) which pass across an optical beam in order to provide an unidirectional scan. The lenses may be modified in order to control the shape of a focal plane. A beam expander (Figures 31, 32, 33, not shown) providing two arcuate opposed beams may supply light to the deflector, in order to eliminate coma. The scanning system may also include beam splitters (Figures 40, 41, not shown). The scanner is for the recording or writing of an image and use in bar code scanning is mentioned. |
