Illuminating unit having diffusion means

Details Illuminating unit having diffusion means Illuminating unit having diffusion means

2005-02-22

2005-02-22

Le, Que T. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Housings

C250S216000

Reexamination Certificate

active

06858837

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.

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