| 摘要 |
<p>A laser beam scanning system (10) which consists of reflective optics. The laser beam scanning system (10) includes a first curved mirror (11), a second and a third generally flat mirrors (12, 13) oriented approximately perpendicular to each other, a fourth concave mirror (14), and a scanning mirror (15). The laser beam scanning system (10) has a variable scan angle and focal length. The variable focal length in the reflective scanning system is achived by simultaneously moving two perpendicular mirrors (12, 13).</p> |
