IMAGE FORMING OPTICAL SYSTEM, IMAGE READER USING IMAGE FORMING OPTICAL SYSTEM, AND IMAGE WRITER

摘要

An image forming optical system for forming a high-quality image by determining a most suitable design condition while ensuring a uniform and adequate amount of light and preventing ghost. In this image forming optical system having a slit, the factors to remove the stray light include the inclination of the direction of a lens array, the slit width, the lens pitch, the angle of view, and height of the light-shielding wall. The position of the slit, the thickness of the lens, and width of the lens line do not affect the stray light removal but affect the brightness. If the system has no slit, the essential factors to remove the stray light include the height of the light-shielding wall and the lens pitch. The thickness of the lens and width of the lens line do not affect the stray light removal but affects the brightness.