| 摘要 |
PURPOSE:To improve the efficiency of optical transmission by mounting an insulating subtrate having a region, through which beams are transmitted, and a region, through which beams are interrupted, between a light-emitting element and a light-receiving element and fitting a reflector plate having a paraboloid so as to cover a light-emitting element in the region through which beams are transmitted. CONSTITUTION:A light-receiving element 1 having light-receiving regions 2 containing P-N junctions is prepared to one part of the surface of an silicon substrate. With a light-transmitting insulating substrate 3, a thin-film 4 having a filter function interrupting beams having the wavelength of a light-emitting element is formed to one surface and a thin-film 5, which interrupts beams while having conductivity, to the other surface, and approximately equal opening sections are shaped while corresponding to the light-receiving regions in the light-receiving element. LEDs 6 are laminated just above light-receiving sections in the insulating substrate 3, and fixed electrically, and the LED6 and an electrode 5 are connected by a bonding wire 7 in another electrode. Reflector plates 8 in which paraboloids are formed of plastic resins are fastened so as to cover the LEDs 6. |
