Patent ID: 8279326
Filing Date: 2012-10-02
Classification: G03B

Abstract:
1. A light quantity detecting apparatus comprising: an integration detection section configured to output a signal that varies with integrated quantities of light received by a light-receiving device; a comparison section configured to compare the signal output by said integration detection section with a reference value in order to output a signal representing a result of the comparison; a dummy signal generation section configured to generate a signal equivalent to the comparison result signal output by said comparison section; a changeover section configured to switch between the output of said comparison section and the signal generated by said dummy signal generation section in response to a control signal; and an integration signal generation section configured to (a) receive the signal from the comparison section and the signal from the dummy signal generation section as determined by the changeover section and (b) generate a signal indicating an end of the integration of the quantities of received light in response to the signal received from the changeover section.