| 摘要 |
PROBLEM TO BE SOLVED: To provide a scanning optical system which can substantially superimpose scanning lines with each other formed on a surface of a scanning object, without loss of light energy and without using an expensive means for converting anamorphic beam diameter. SOLUTION: A laser luminous flux emitted from each individual light emitting point of a semiconductor laser array 10 and made into a parallel luminous flux with a collimating lens 11, is separated into a pair of laser luminous fluxes composed of a linear polarizing component which is mutually orthogonally crossed with a double image member 13, after made into a circular luminous flux with a 1/4 wavelength plate 12. Then, a pair of the laser luminous fluxes is focused in a subscanning direction in the vicinity of a reflection surface of a polygon mirror 16 with a cylindrical lens 14. A pair of the laser luminous fluxes reflected by each reflection surface forms a pair of scanning lines which shifts to a subscanning direction and superimposes each other on the surface S of the scanning object by being deflected dynamically in a main scanning direction and transmitting simultaneously an imaging optical system 20. COPYRIGHT: (C)2004,JPO |
