Patent ID: 7149017
Filing Date: 2006-12-12
Classification: G02B

Abstract:
1. An optical deflector apparatus comprising: a modulation signal generator for generating signals to modulate a light so as to turn on or turn off a light source; a deflector for deflecting the light by reflecting light from the light source at a movable reflection surface, the deflector being configured to be able to change a direction of the movable reflection surface; a light detector for outputting signals based on the received light, wherein at least three light-receiving regions are one-dimensionally or two-dimensionally arranged and the light deflected by the deflector is received; a driver for supplying to the deflector driving signals to change the direction of the movable reflection surface; and a controller for defining a maximum deflection angle of the light to be deflected, by supplying control signals to the driver based on the signals outputted from the light detector, wherein the light is modulated so as to turn on or turn off the light source to form at least two light spots at the at least three light receiving regions, and the maximum deflection angle is defined based on the signals obtained by receiving the two light spots.