Shotaro Yokoyama

Light intensity detecting circuit with dark current compensation

Light sensor having an integration circuit

Optical sensing circuit including an integral capacity

Object-detecting system for optical instrument

Method and apparatus for aligning image sensors with an optical system in an optical apparatus

Automatic focusing apparatus including image contrast detection means

Device for measuring light intensity received by a photosensor

Weighted event counting circuit

Image data comparison circuit for rangefinders

Clock signal generating circuit