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    • 2. 发明申请
    • Light signal receiving apparatus
    • 光信号接收装置
    • US20050051710A1
    • 2005-03-10
    • US10922966
    • 2004-08-23
    • Yuichi HasebeKiichiro Shinokura
    • Yuichi HasebeKiichiro Shinokura
    • G02B3/00G02B13/00G02B13/18H01J3/14
    • G02B13/002G02B13/18
    • A light signal receiving apparatus receives a light signal transmitted from a light signal transmitting apparatus disposed in a household room, and supplies video and audio information to a video equipment, and an audio equipment including an amplifier and a speaker. The light signal receiving apparatus includes an optical system condensing the light signal on a light-receiving element with a condensing lens. The light-receiving element is disposed nearer the condensing lens in relation to a focusing point of the condensing lens, and the condensing lens includes a non-spherical surface shape strongly distributing, on the light-receiving element, an intensity distribution on a light-receiving element disposed plane of an incident light obliquely incident with respect to an optical axis of the condensing lens within a range of predetermined angles. Thereby, the light signal incident on the condensing lens within a large range can be received at a predetermined light receiving intensity.
    • 光信号接收装置接收从设置在家庭室的光信号发送装置发送的光信号,并将视频和音频信息提供给视频设备,以及包括放大器和扬声器的音频设备。 光信号接收装置包括将光接收元件上的光信号与聚光透镜聚光的光学系统。 光接收元件相对于聚光透镜的聚焦点设置得更靠近聚光透镜,并且聚光透镜在光接收元件上包括强光分布的非球形表面形状, 在预定角度的范围内相对于聚光透镜的光轴倾斜入射的入射光的接收元件设置面。 因此,可以以预定的光接收强度接收入射在大范围内的聚光透镜的光信号。