| 摘要 |
<p>PURPOSE:To enable the reading of code-patterned data marked on an object by a method wherein a light-emitting body, so designed that its emission will pass through a transparent substrate, and a plurality of photodetecting elements, so designed as to receive the light emitted by the light-emitting body and then reflected by the object to be read, are provided. CONSTITUTION:Light emitted by an LED 7 goes into a substrate 1 at a window 1c provided in its surface 1a, and lands on an object 6 to be read after passing through the substrate 1. The quantity of light to be reflected from the surface of the object 6 is different when the data pattern on the surface of the object 6 is different. The reflected light come backs to the surface 1b of the substrate 1, travels through the substrate 1, and arrives at photodetecting elements 5. The light received by the photodetecting elements 5 further proceeds through a transparent electrode 2 before landing on a photoelectric semiconductor 3. The photoelectric semiconductor 3 generates a current with its quantity dependent upon the quantity of light received, and the current is outputted at the transparent electrode 2 and a metal electrode 4. Accordingly, data on the object 6 may be determined by measuring the electric power from the photodetecting elements 5.</p> |
