Illuminating unit for illuminating an original to be read by an

Details Illuminating unit for illuminating an original to be read by an Illuminating unit for illuminating an original to be read by an

1996-12-27

1999-11-16

Le, Que T.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250239, 358482, H01J 4014

Patent

active

059862530

ABSTRACT:
There is disclosed an image reading apparatus constructed by an illuminating unit for illuminating an object in a line shape, an image forming optical system for forming a light, as an image, from the object illuminated by the illuminating unit, a line sensor for converting the light formed as an image by the image forming optical system into an image signal, and a frame for holding the illuminating unit and the line sensor, wherein a shape in which vertices of at least a part of the cross section of the illuminating unit are connected by straight lines is set to a polygon of a pentagon or more, so that an image can be stably read at a high quality.

REFERENCES:
patent: 5570202 (1996-10-01), Kumashiro
patent: 5696607 (1997-12-01), Yamana et al.

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