| 摘要 |
<p>A light signal receiving apparatus receives alight signal transmitted from a light signal transmitting apparatus (100) , such as a tuner and a terminal connected to the Internet, which are disposed in a household room, and supplies video information and audio information to a video equipment such as a TV, 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 (11) with a condensing lens (10). The light-receiving element is (11) disposed nearer the condensing lens (10) in relation to a focusing point of the condensing lens, and the condensing lens (10) 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 (52) 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. <IMAGE> <IMAGE></p> |
