Angular displacement detecting method for adaptive optics system, imaging magnification detecting method for adaptive optics system, and adaptive optics system

摘要

An adaptive optics system includes a spatial light modulator configured to spatially modulate a phase of an optical image incident on a modulation surface and a wavefront sensor including a lens array having a plurality of two-dimensionally arranged lenses and an optical detection element for detecting a light intensity distribution including converging spots formed by the lens array and configured to receive the optical image after the modulation from the spatial light modulator, and compensates for wavefront distribution by controlling a phase pattern displayed in the spatial light modulator based on a wavefront shape of the optical image obtained from the light intensity distribution, wherein an amount of angular displacement between the modulation surface and the wavefront sensor is calculated.

主权项

1. An angular displacement detecting method for an adaptive optics system, which includes a spatial light modulator configured to spatially modulate a phase of an optical image incident on a modulation surface and a wavefront sensor including a lens array having a plurality of two-dimensionally arranged lenses and an optical detection element for detecting a light intensity distribution including converging spots formed by the lens array and configured to receive the optical image after the modulation from the spatial light modulator and which compensates for wavefront distortion by controlling a phase pattern displayed in the spatial light modulator based on a wavefront shape of the optical image obtained from the light intensity distribution, wherein an amount of angular displacement between the modulation surface and the wavefront sensor is calculated, the angular displacement detecting method comprising:
a light intensity distribution acquiring step of acquiring the light intensity distribution through the optical detection element in a state in which one of a phase pattern having linearity in at least one direction and a spatially non-linear phase pattern is displayed in first and second regions on the modulation surface corresponding to one of the plurality of lenses or two or more lenses adjacent to each other and the other is displayed in a region surrounding the first and second regions; and an angle calculating step of obtaining the amount of angular displacement between the modulation surface and the wavefront sensor based on a relative positional relation between the converging spot corresponding to the first region and the converging spot corresponding to the second region included in the light intensity distribution obtained in the light intensity distribution acquiring step.