Light source device

Abstract

A light source apparatus includes: a light source configured to output light; a spatial light modulator including an input unit for a control signal and configured to be able to control distribution of angles at which incident light is reflected based on the control signal; a diffraction grating configured to disperse the light output from the light source to cause the light to be incident on the spatial light modulator, and return at least a part of the light reflected by the spatial light modulator to the light source; and a pinhole configured to cause only a part of the light returned from the diffraction grating in a spatially dispersed state to pass therethrough. In the light source apparatus, an optical resonator is formed by the light source and the spatial light modulator, and the light passing through the pinhole and returned to the light source is output.

Dependencies are inferred from the claim text.