Illumination device

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11732860
APP PUB NO 20200318805A1
SERIAL NO

16605942

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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With a simple configuration, a clear illumination area with suppressed blurring is formed, and a form such as position, shape, and size thereof is changed. Divergent light from a point light source is shaped by a collimating optical system and emitted to a hologram element. Since the point light source is arranged at a front focal position of the collimating optical system, the light emitted from the collimating optical system is emitted to the hologram element as parallel light, and diffracted light therefrom forms an illumination area at a predetermined position on an illumination target surface. A light scanning part rotating about a predetermined rotation axis is arranged between the point light source and the collimating optical system, and light incident on the collimating optical system is scanned. By this scanning, an incident angle of the parallel light incident on the hologram element changes, and the illumination area changes.

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Patent Owner(s)

  • DAI NIPPON PRINTING CO., LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kurashige, Makio Tokyo, JP 99 551
Nishio, Shumpei Tokyo, JP 25 31

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