Patent ID: 6037964
Filing Date: 2000-03-14
Classification: B41J

Abstract:
An exposure head comprising:a light source portion including a plurality of semiconductor light sources arranged for irradiating a photosensitive sheet with exposure light for forming an image on the photosensitive sheet;a front surface portion having a plurality of small openings at positions corresponding to said semiconductor light sources; anda light shielding portion having a plurality of enclosing openings at positions corresponding to the semiconductor light sources, said enclosing openings having a size that allows said semiconductor light sources to be housed therein,said front surface portion and said light shielding portion being layered on said light source portion so that said front surface portion faces the photosensitive sheet and said light shielding portion is disposed between said front surface portion and said light source portion, said small openings of said front surface portion being smaller than said enclosing openings of said light shielding portion such that each enclosing opening is partially covered by said front surface portion,wherein exposure light from said semiconductor light sources passes directly through said small openings of said front surface portion to the photosensitive sheet without any intervening optical lens system.