| 摘要 |
<p>An optical beam scanner comprises: a light source (2); a deviation unit (5) for deviating a beam from the light source and emitting a scanning beam; a compensation unit for compensating a vertical inclination of the deviation unit and comprising a first optical element (10) for deforming the scanning beam into a vertically longitudinal oval shape and a second optical element (11) for reforming the oval beam into a round shape, and converging the scanning beam on a scanning surface (7); and, a detection unit (9, 8) for detecting the scanning beam between the deviation unit (5) and the second optical element (11). The beam deformation can render the detection unit less sensitive to unwanted inclinational changes of the deviation unit.</p> |
