Wavefront sensor

Abstract

The invention discloses a wavefront sensor. The wavefront sensor includes a first polarizing plate, a half wave plate, a calcite crystal, a quarter wave plate, a second polarizing plate and an array photodetector which are sequentially placed, wherein an optical surface of the device is perpendicular to the light beam spreading direction. The structure is simple, the quantity of optical elements is small, in combination with the present mature crystal growth and cutting process, batch production potential is achieved, moreover, the limitation of a lens array of the wavefront segmentation sampling element is eliminated by the wavefront sensor based on two-dimensional quantum weak measurement, pixel-level wavefront restoration accuracy is achieved, therefore, wavefront restoration of the ultra-high spatial frequency can be achieved, more importantly, the thinking formula of improving accuracy of wavefront restoration is broken, pursuing high-density sub-aperture arrangement and complex ultra-resolution algorithms is not needed, and the wavefront sensor is of great significance in the field of wavefront detection.

Description

technical field [0001] The invention relates to the technical field of optical information measurement and quantum precision measurement, in particular to a wavefront sensor. Background technique [0002] Wavefront sensing technology is a modern optical measurement technology. Through the sampling, modulation and detection of the far-field beam intensity distribution, the reconstruction and restoration of the wavefront phase is realized. It is widely used in wavefront correction, astronomical observation, medical imaging, laser technology and other fields. Typical wavefront sensors include shear interferometers, curvature wavefront sensors, and Hartmann wavefront sensors. These sensors have different characteristics and performance, suitable for different applications. Among them, the Hartmann wavefront sensor has high light energy utilization rate, strong anti-noise ability, simple and efficient, and real-time measurement, and has become one of the common wavefront sensor...

AI Technical Summary

Problems solved by technology

(2) Limitation of the spatial resolution of the Hartmann wavefront sensor

Therefore, from the analysis of traditional detection strategies, it is difficult for the Hartmann wavefront sensor to achieve the pixel-level spatial resolution

Improving the measurement accuracy of the Hartmann wavefront sensor has become a research hotspot. Current solutions often increase the accuracy of wavefront restoration by increasing the complexity of devices and algorithms, but they cannot break through this fundamental limitation.

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