| 摘要 |
<p>The optical space transmission apparatus in accordance with the present invention consists of an optical transmission system (6, 7) including an information transmitting light emitting device (5) and an optical transmission fiber (7), an information receiving photoreceptor (9), an optical reception system (4) and a transmission/reception lens (3), and the end portion (7a) of the optical transmission fiber (7) is positioned near the focal plane of the transmission/reception lens (3) and near and on the optical axis of this lens (3), so that the transmission light emitted from the information transmitting light emitting device (5) is transmitted into an optical space transmission line (8) through the optical transmission system (6, 7) and through the transmission/reception lens (3) and the reception light transmitted through the optical space transmission line (8) is projected into the information receiving photoreceptor (9) through the transmission/reception lens (3) and through the optical reception system (4) and the transmission light and the reception light are spatially separated near the end portion (7a) of the optical transmission fiber (7). Accordingly, though simple in construction, the apparatus can improve transmission efficiency and S/N ratio of both transmission and reception lights.</p> |
