OPTICAL PATH FOR CONTROL,申请号JP19820108888-传众专利搜索

OPTICAL PATH FOR CONTROL

申请公布号：JPS58225746(A)

申请号：JP19820108888

申请日期：1982.06.24

申请公布日期：1983.12.27

申请人：

RICOH KK

发明人：EJIRI KOUICHI;KUBO KIKUO

分类号：H04B10/27;H04B10/2507;H04B10/272;H04B10/524

主分类号：H04B10/27

摘要：PURPOSE:To simplify a signal line, to facilitate the addition and replacement of a unit, and to improve S/N ratio by preventing the mixture of a signal, by providing a light source and a photodetecting element in couple, and allowing the photodetecting element in the optional couple to detect light from the light source in the differenct couple. CONSTITUTION:A light emitting element K1 as a light source and a photodetecting element S1, and another light emitting element K2 and a photodetecting element S2 are embedded in a plate 1 at optional positions respectively. A control signal from a controller 2 drives the light emitting element K1 through an interface 3 to generate a light pulse string. The light pulses are diffused in the plate 1 which is a transparent photoconductive plate to travel while reflected repeatedly at the boundary of the surface part of the plate 1, entering the photodetecting element S2 partially. The photodetecting element S2 detects the light pulses at any position in the plate 1 to convert them into an electric signal. This electric signal is transmitted to a unit 5 through an interface 4. A circuit for generating a negation signal is incorporated in each interface to make the photodetecting element insensitive to light from their coupled light emitting element.