Fingerprint extracting equipment based on capillary X ray semitransparent mirror
An extraction device and capillary technology, which are applied in the field of fingerprint extraction devices based on capillary X-ray semi-lenses, can solve the problems that cannot be applied on site, the accuracy is not high enough, and the process of extracting fingerprints is cumbersome, etc., so as to improve the use safety factor, shorten the time, The effect of improving the timeliness
Inactive Publication Date: 2011-04-06
CHINA UNIVERSITY OF POLITICAL SCIENCE AND LAW
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Problems solved by technology
It is difficult for the existing above-mentioned fingerprint extraction methods to determine what substance the fingerprint owner has touched before leaving the fingerprint while extracting the fingerprint, and some of these methods can only be carried out in the laboratory and cannot be applied to the field. The process of extracting fingerprints is too cumbersome and the accuracy is not high enough
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[0024] see figure 1 , the fingerprint extraction device based on capillary X-ray semi-mirror contains X-ray source 1, capillary X-ray semi-mirror 2, polycapillary X-ray collimator 4, X-ray detector 5 and support 6, X-ray source 1, capillary X-ray The half mirror 2, the polycapillary X-ray collimator 4, and the X-ray detector 5 are fixed on the bracket 6. The X-rays emitted by the X-ray light source 1 are converged into an X-ray beam spot 3 through the capillary X-ray semi-mirror, and the beam spot 3 is irradiated on the fingerprint to excite the X-ray fluorescence corresponding to the element at the fingerprint, and the corresponding X-ray fluorescence emitted by these fingerprints is multiplied After the capillary X-ray collimator 4 is collimated and converged, it is detected by the X-ray detector 5, and the X-ray fluorescence signal is analyzed by a computer for X-ray fluorescence imaging analysis, thereby obtaining a fingerprint.
[0025] see figure 2 , the diameter D of...
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Abstract
The invention relates to fingerprint extracting equipment based on a capillary X ray semitransparent mirror, which comprises an X ray light source, the capillary X ray semitransparent mirror, a multi-capillary X ray collimator, an X ray detector and a bracket, wherein the core of the equipment is the capillary X ray semitransparent mirror and the multi-capillary X ray collimator; the capillary X ray semitransparent mirror is utilized to converge X rays emitted by a portable light source with low power so as to obtain an X ray beam spot with higher power density; the area of the X ray beam spot is larger than the area of an integral fingerprint; the beam spot is utilized to simultaneously excite the X ray fluorescence corresponding to the different position elements of the fingerprint; and the X ray fluorescence is reflected on the X ray detector after the collimation and the convergence with high space resolution through the multi-capillary X ray collimator so as to obtain the fingerprint. When the equipment is utilized to obtain the fingerprint, the point-to-point scanning analysis is not required on the fingerprint so as to shorten the time of obtaining the fingerprint and enhance the timeliness of obtaining the fingerprint.
Description
(1) Technical field [0001] The invention relates to the technical field of fingerprint extraction, in particular to a fingerprint extraction device based on a capillary X-ray semi-mirror. (2) Background technology [0002] Fingerprint extraction technology is constantly developing in the direction of fast, non-destructive and on-site extraction. At the same time, we are very concerned about the following technologies: while extracting fingerprints, we can also know what substances the fingerprint owner has touched before leaving fingerprints, because this is very helpful for narrowing the scope of criminal investigation. help. [0003] Existing methods for extracting fingerprints are as follows. If fingerprints are left on the surface of non-absorbent articles such as metal, plastic, glass, and tiles, it is easier to extract fingerprints at this time, usually by powder method and magnetic powder method. If fingerprints are left on the surface of water-absorbing articles suc...
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Login to View More IPC IPC(8): A61B5/117G06K9/00A61B5/1172
Inventor 孙天希刘志国刘鹤贺
Owner CHINA UNIVERSITY OF POLITICAL SCIENCE AND LAW