Spatial light modulator for spatially modulating the phase of the optical image incident on the modulating surface, a lens array in which a plurality of lenses are arranged in a two-dimensional shape, and light for detecting a light intensity distribution including a condensing spot formed by the lens array By having a detection element and having a wavefront sensor for receiving the optical image after modulation from the spatial light modulator, by controlling the phase pattern displayed on the spatial light modulator based on the wavefront shape of the optical image obtained from the light intensity distribution In a compensation optical system that compensates for wavefront distortion, a corresponding relationship between the modulating surface and the wavefront sensor is adjusted.
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