Hartmann sensor relay lens with magnification fine adjustment mechanism

Abstract

The Hartmann sensor relay lens with a magnification fine-tuning mechanism belongs to the field of photoelectric detection and adaptive optics. In the relay lens barrel, the front component lens is fixed by the pressure ring, the rear component lens is installed in the rear component seat, and is fixed by the rear component pressure ring, the adjustment component lens is installed on the adjustment component seat, and the adjustment component lens is installed on the adjustment component The component pressure ring is fixed, and the component lens can be moved back and forth to adjust the component lens by turning the adjusting component dial to realize the fine-tuning of the relay lens magnification. After adjusting to the exact position, tighten the adjusting component set screw to fix the adjusting component; The front component is a negative and positive doublet lens with positive refractive power, the negative lens is a meniscus lens, and the positive lens is a biconvex lens; the rear component is a positive and negative doublet lens with positive refractive power, and the positive component It is a biconvex lens, and the negative element is a meniscus lens; the magnification adjustment component is a meniscus lens with a positive refractive power.

Description

technical field [0001] The invention relates to a Hartmann sensor relay lens with a magnification fine-tuning mechanism, which belongs to the field of photoelectric detection and adaptive optics. Background technique [0002] The Hartmann sensor is an optical measurement device that obtains phase information of the wavefront by measuring the slope of the wavefront. It is the most important wavefront detection instrument in the fields of adaptive optics, active optics, and laser beam inspection. [0003] Such as figure 1 As shown, the Hartmann sensor is composed of microlens array, relay lens, CCD camera and corresponding data acquisition and processing system. Among them, the relay lens is used to image the speckle image formed by the microlens on the target surface of the camera according to a certain magnification, so as to realize the matching between the size of the microlens and the pixel of the camera. Especially in the wavefront detection of the adaptive optics syst...

AI Technical Summary

Problems solved by technology

It can be seen that due to the magnification error, the number of pixels occupied by the sub-aperture size is not an integer, and the spot shape changes irregularly after the discrete sampling of the CCD pixel, which will affect the centroid calculation accuracy

[0005] The current Hartmann sensor relay lens is a fixed magnification lens. Although the magnification is strictly designed according to the matching between the microlens size and the CCD pixel size, due to processing and assembly errors, there is a certain amount of difference between the final magnification of the system and the design value. deviation

In particular, optical processing errors are unavoidable, and generally the magnification error cannot be compensated by simple interval adjustment, which will definitely affect the performance of the Hartmann sensor

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