Apparatus for adjusting optical sensors with threshold memory

摘要

A device for adjusting optical sensors in which light from a light emitting element is detected by a light receiving element to determine whether the output level of said light receiving element exceeds a certain threshold. The present device is used for adjusting the optical sensors used, for example, in an automatic cash receiving and dispensing machine and the like and enables accurate operation the bill and/or coin handling machines to continue to operate reliably despite changes with the time of the optical sensors and the deposit of dust on the sensors, by constantly comparing the light reception level with a predetermined threshold and utilizing the optimum threshold.