| 摘要 |
PROBLEM TO BE SOLVED: To improve symmetry and uniformity of illuminance distribution of an imaging spot on a surface to be scanned. SOLUTION: In an OFS scanning optical device which makes a luminous flux made incident on a deflection surface wider than the deflection surface, angles formed between center axes of emitted distributions from light emitting points of lasers being light sources and the optical axis of a corresponding optical system within a main scanning section and the overall angular width of laser beam radiation angles within the main scanning section are regulated. COPYRIGHT: (C)2004,JPO |
