Formation of optical sensor zone of parallel light system

Abstract

Abstract PURPOSE:To eliminate the influence of adjacent element upon each other to secure a sensing space due to the parallel light system, by dividing a material, where optical sensor devices consisting of pairs of light emitting elements and photodetectors are gathered, into plural groups and driving them in time series in case of the detection due to the parallel light system of this material. CONSTITUTION:A light projector 6 consisting of 400 light emitting elements 15-1-15-400 which are divided into 8 groups and a photodetector 7 consisting of 400 photodetecting elements 16-1-16-400 which are divided into 8 groups face to each other and are arranged in the vertical direction, and they are scanned vertically through movable frames holding them to detect the shade pattern of a human body between the light projector 6 and the photodetector 7. These elements are divided into a group consisting of light projecting elements and light receiving elements having 1 as the final number, a group consisting of both elements having 2 as the final number,-a group consisting of both elements having 0 as the final number, and these groups are driven in time series, thereby eliminating the influence of light between adjacent elements to secure the sensing space due to the parallel light system.

Inventors

• 👤 Munekazu Takada
• 👤 高田　宗和

Bibliographic Details