Method for adjusting compensating optical system and compensating optical system

An adaptive optics system comprising:

• a wavefront modulator receiving an optical image from a light source or an observation object;
• a wavefront sensor receiving an optical image from the wavefront modulator to measure a wavefront shape of the optical image;
• and
• a control section compensating for a wavefront distortion by controlling a pattern to be displayed on the wavefront modulator based on the wavefront shape measured by the wavefront sensor, wherein
• the control section includes:
• a singularity generation pattern preparing section causing the wavefront modulator to display a singularity generation pattern which is a pattern including a singularity at a predetermined position;
• and
• a singularity detecting section detecting a position of the singularity in an adjustment wavefront shape which is a wavefront shape when an optical image modulated by the singularity generation pattern enters the wavefront sensor, based on a measurement result in the wavefront sensor, and
• the control section adjusts a positional deviation between a wavefront shape measured in the wavefront sensor and a compensation pattern displayed on the wavefront modulator based on a positional deviation of the position of the singularity detected by the singularity detecting section with respect to the predetermined position.