| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of components and complicated assembly jobs by eliminating an incident system reflection mirror on the optical path between a semiconductor laser and a rotary polygon mirror, to suppress the increase in the dimensions and optimize the layout of an optical scanner in the optical axis direction of a luminous flux emitted from a semiconductor laser while eliminating the incident system reflection mirror. SOLUTION: In the optical scanner, a light source unit 1, a deflector 6 and a scanning lens 4 are arranged on a single straight line; the laser luminous flux L emitted from the semiconductor laser 1c is made incident diagonally with respect to a deflection face of the deflector 6 in a subscanning direction; the laser luminous flux is scanningly deflected with the deflector 6, passes through the scanning lens 4, is reflected on a folding mirror 7, and passes through between the light source unit 1 and a collimator lens 2 in the optical axis direction of the laser luminous flux L emitted from the semiconductor laser 1c. COPYRIGHT: (C)2010,JPO&INPIT |
