Lobster eye X-ray optical element focusing performance test apparatus and method based on CCD detector

Abstract

The invention provides a lobster eye X-ray optical element focusing performance test apparatus based on a CCD detector. The apparatus comprises an X-ray optical tube, a laser, a diaphragm, a six-dimensional adjustment apparatus, a CCD detector, a laser range finger, an analog-to-digital conversion card, a digital-to-analog conversion card, a horizontal adjustment apparatus and a computer signal processing system. During an operation test, first of all, an optical path calibration is performed, after the calibration, the laser is moved out, and the X-ray optical tube is moved to an optical path; and a lobster eye X-ray optical element is adjusted to carry out MPO full-caliber two-dimensional scanning, a CCD X-ray detector records an imaging result, and through splicing and processing a recorded image, multiple focusing performance indexes including a focal length, a focal spot, light intensity distribution, space angle resolution and the like are obtained. The test apparatus provided by the invention is ingenious in structure, good in real-time performance, low in test cost and convenient to operate.

Description

technical field [0001] The invention relates to the technical field of X-ray detection and imaging, in particular to a CCD detector-based device and method for testing the focusing performance of a lobster eye X-ray optical element. Background technique [0002] The optical constants of X-rays make it difficult to focus by refraction, so grazing incidence total reflection is usually used for focusing. At present, the X-ray grazing incidence total reflection optical system includes KB optical system, Wolter optical system and X-ray capillary lens, etc., but they still have some shortcomings. For example, the field of view of the KB optical system is too small due to factors such as grazing incidence aberration and structure. The Wolter-type optical system is bulky and bulky, which seriously hinders its practical application. However, the energy transmission efficiency of the X-ray capillary lens in the X-ray band such as 1-5keV is low, and the cost is expensive. However, t...

AI Technical Summary

Problems solved by technology

The MPO focusing performance is the most important parameter as the core device of the X-ray detection and imaging system, so it is extremely critical to invent a method and device that can measure the MPO focusing performance, and so far the detection at home and abroad is based on synchrotron radiation To perform detection, but the operation is cumbersome, time-consuming, and the cost of running the test is extremely expensive. It is practical and real-time poor, and the X-ray beam has a small area of ​​action, which is difficult to meet the actual testing needs of users.

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