| 摘要 |
PURPOSE:To realize the minaturization of an optical equipment and the improved easiness of building in a receiver, and to improve its reliability and life by arranging luminous elements over a card and photo detectors under the card bringing about specific relations between both the sides. CONSTITUTION:At the side of luminous elements 33, reflector 34 with one incident surface and (m) reflective surfaces is used for dividing incident light into (m) beams of relfected light, and reflectors 34 are alighed as many as (n) channels. At the side of photo detectors 36, the (m)-number beltlike CdS elements are arranged on respective bits of the (n)X(m)-number memory planes perpendicularly to corresponding reflectors 34, and light reflected from the same-number bit of each channel is detected by one element. The (m)-number condensers 47 which has the (n)-number reflectors and one focusing surface are made to cross reflectors 34 at right angles so as to focus light on one point by the (n)-number reflective surfaces, and photo detectors are arranged at the condenser parts of respective condensers 47. Then, card 35 can be inserted freely from insertion mouths 50 and 60. |
