OPTICAL WIRELESS RECEIVER

摘要

PURPOSE: To provide an optical wireless receiver which can reduce the influence of optical noises in a simple constitution and also can secure a sufficient receivable range with no limitation of its installation place. CONSTITUTION: A material of a low transmission factor is used at the center part of wide-angle photodetection lens 2, so that a light quantity adjustment lens part 2b is formed. Other parts of the lens 2 use a material of a high transmission factor as a high transmission factor lens part 2a. Then the part 2b is used as an incident optical path and therefore the transmission of optical noises s2 can be attenuated.