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    • 6. 发明授权
    • Light irradiation device and image forming apparatus
    • 光照射装置和成像装置
    • US09057809B2
    • 2015-06-16
    • US14468382
    • 2014-08-26
    • Akihiro IwamatsuTsuyoshi FujimotoTokiko Inoue
    • Akihiro IwamatsuTsuyoshi FujimotoTokiko Inoue
    • H04N1/04F21V8/00H04N1/028
    • H04N1/0284G02B6/0045
    • A light irradiation device includes: a light source to output diffused light; and a light guide member to guide the diffused light to an irradiation point. The light guide member includes an incidence surface which the diffused light enters, a first emission surface to emit the entered diffused light, while further diffusing the entered diffused light with a first diffusion characteristic to emit the diffused light at a first diffusion angle, and a second emission surface to emit the entered diffused light, while further diffusing the entered diffused light with a second diffusion characteristics to emit the diffused light at a second diffusion angle. The second diffusion angle provided by the second diffusion characteristic is smaller than the first diffusion angle provided by the first diffusion characteristic.
    • 光照射装置包括:输出漫射光的光源; 以及导向构件,用于将漫射光引导到照射点。 导光构件包括漫射光入射的入射面,发射入射漫射光的第一发射面,同时以第一扩散特性进一步扩散入射的漫射光以以第一扩散角发射漫射光,并且 第二发射表面发射输入的漫射光,同时进一步扩散具有第二扩散特性的输入的漫射光以以第二扩散角发射漫射光。 由第二扩散特性提供的第二扩散角小于由第一扩散特性提供的第一扩散角。