Title: Photocopier illumination device

Abstract: An optical illumination device for use in a copying apparatus of the type wherein an object is to be illuminated and an image thereof is to be projected through a particular image transmitter formed of a plurality of optical fibers of graded refractive index in bundled configuration to a light sensitive surface, comprises a source of illumination light and a light guide duct of substantially flattened cubic body. The light guide duct is designed such that rays of light from the light source accommodated within the light guide duct are directed towards a curved reflective surface and subsequently converge at one point on the transparent support structure for the support of the original to be copied thereon to form a strip or ribbon of light available for illumination of the original to be copied.

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Inventors: Tanaka, Susumu (Sakai, JA)
Enoguchi, Yuji (Osaka, JA)
Ogawa, Masaya (Sakai, JA)
Kawabata, Hidetoshi (Tondabayashi, JA)
Kurita, Takaji (Kawachinagano, JA)
Fujiwara, Takao (Sakai, JA)
Murasaki, Hiroshi (Sakai, JA)
Wada, Kenichi (Sakai, JA)

Application Number: 583391
Filing Date: 1975-06-03
Publication_date: 1976-09-21
Assignee: Minolta Camera Kabushiki Kaisha (Osaka, JA)
Primary Class(es): 355/1 355/50, 355/67, 399/219, 399/220
Other Classes:
US Patent Ref:

3060805	Oct, 1962	Brumley	355/1.
3125013	Mar, 1964	Herric, Jr. et al.	355/1.
3364816	Jan, 1968	Jeffree	355/51.
3532424	Oct, 1970	Miles	355/51.
3659935	May, 1972	Morow	355/67.
3694076	Sep, 1972	Weber	355/50.
3777135	Dec, 1973	Rees	355/70.
3834814	Sep, 1974	Wolff et al.	355/51.

Other Refs:
Primary Examiner: Wintercorn, Richard A.
Assistant Examiner:
Attorney: Wenderoth, Lind & Ponack