Patent ID: 8310467
Filing Date: 2012-11-13
Classification: G02B

Abstract:
1. An optical-emission-signal output apparatus for outputting an optical-emission signal specifying an optical-emission timing to an optical-emission unit for outputting light to an optical-scan unit which scans sinusoidally incident light with respect to a time axis by resonance, the optical-emission-signal output apparatus comprising: a master clock generator that outputs a master clock at a predetermined intervals; a frequency divider that divides the master clock outputted by the master clock generator; a delay-time setting unit that specifies one of a plurality of delay times; and a signal output unit that corrects timing of the optical-emission signal based on a result of division by the frequency divider and a delay time specified by the delay-time setting unit and outputs the optical emission signal, wherein by adjusting a frequency dividing ratio of the master clock, intervals between reference timings are adjusted to be non-constant and thereby scan angle of the light from the optical-scan unit changes at a nearly constant angle at each time the optical emission signal is outputted.