Lighting device, image-reading device, color-document...

Details Lighting device, image-reading device, color-document... Lighting device, image-reading device, color-document...

2004-09-17

2008-10-21

Sember, Thomas M (Department: 2885)

Illumination

Light source and modifier

Including reflector

C362S346000, C362S347000

Reexamination Certificate

active

07438443

ABSTRACT:
A lighting device includes an illumination face having a length and a width; a light-emitting element having a light-ray-releasing face the maximum length of which is equal to or less than the width of the illumination face; and a light-source unit that has an optical element which changes the direction of light rays released from the light-emitting element to be directed to the illumination face. The optical element has a concave-face reflecting unit having a cross section that is shaped into a quadratic curve or a pseudo quadratic curve, which is placed at least on one portion thereof, and a luminance distribution on the illumination face has a flat portion that is equal to or not less than a predetermined width.

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U.S. Appl. No. 11/851,846, filed Sep. 7, 2007, Nishina.

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