Patent ID: 6211898
Filing Date: 2001-04-03
Classification: H04N

Abstract:
An optical apparatus comprising:scanning means for scanning light irradiated from a light source to an object to be scanned at predetermined scanning periods in a predetermined direction;reference timing signal generating means for generating a reference timing signal upon receiving the light which has been scanned by the scanning means; andcontrol means for setting a driving timing for the light source based on the reference timing signal generated by the reference timing signal generating means,the optical apparatus further comprising memory means for storing a table comprising driving timing data for each of a plurality of corresponding periods of the reference timing signal,wherein the control means measures the period of the reference timing signal generated by the reference timing signal generating means, reads out from the table stored in said memory means the driving timing data corresponding to the measured period of the reference timing signal, and sets the driving timing in accordance with the read-out driving timing data.