Hartmann wavefront sensor with adjustable dynamic range

Abstract

The invention provides a Hartmann wavefront sensor with an adjustable dynamic range, which consists of an optical matching system, a wavefront division sampling array, a phase modulator and a photoelectric sensor, wherein the optical matching system is used for shrinking an incident light wave so that the size of the incident light wave is less than the size of the wavefront division sampling array and the size of the phase modulator; the phase modulator is arranged between the optical matching system and the wavefront division sampling array, and the caliber of the phase modulator is greaterthan the clear caliber of the optical matching system; the phase modulator adds aberration to the shrunk incident wave, and multiple subareas are formed in the clear caliber of the phase modulator; the subareas and the sub-apertures of the wavefront division sampling array are in one-to-one correspondence in caliber and distribution, and the generated aberration is added to the light wave passingthrough the corresponding sub-aperture; and the wavefront divisions sampling array divides the light wave processed by the phase modulator into multiple sub-beams, and focuses the sub-beams on a target surface of the photoelectric sensor on a focus surface thereof respectively. The Hartmann wavefront sensor with an adjustable dynamic range provided by the invention can be widely applied to wavefront detection in various wavefront great aberrations.

Description

technical field [0001] The invention relates to a novel optical dynamic wavefront sensor, in particular to a Hartmann wavefront sensor with adjustable dynamic range based on the principle of phase compensation. Background technique [0002] The adaptive optics system is mainly composed of a wavefront sensor, a wavefront controller, and a wavefront corrector. The wavefront sensor can be said to be the "eye" of the adaptive optics system. The detection ability of the wavefront sensor directly affects the performance of the adaptive optics system. Calibration performance. The Hartmann wavefront sensor is currently the most popular and widely used wavefront sensor. A Hartmann wavefront sensor disclosed in Chinese Patent Application Publication (Application No. 98112210.8, Publication No. CN1245904A) mainly uses wavefront split sampling array elements such as microlens arrays to divide the wavefront into many sub-aperture before, and the incident light is respectively collected...

AI Technical Summary

Problems solved by technology

[0004] The technical problem of the present invention is: to overcome the problem that the Hartmann wavefront sensor has a large dynamic range and high measurement accuracy and it is difficult to balance it, and proposes an adjustable dynamic range, which can guarantee the measurement accuracy, and is easy to meet the centroid algorithm accuracy and wavefront segmentation sampling Hartmann Wavefront Sensor Requirements for Off-axis Aberration Control of Array Elements

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