CN209764705U - infrared spectrum imaging system for detecting shooting residues - Google Patents
infrared spectrum imaging system for detecting shooting residues Download PDFInfo
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- CN209764705U CN209764705U CN201821983989.2U CN201821983989U CN209764705U CN 209764705 U CN209764705 U CN 209764705U CN 201821983989 U CN201821983989 U CN 201821983989U CN 209764705 U CN209764705 U CN 209764705U
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Abstract
The utility model belongs to the technical field of the shooting residue detects, a infrared spectrum imaging system of inspection shooting residue is disclosed, including visible light spectrum imager and infrared filter, infrared filter sets up the front end of visible light spectrum imager's objective loops through from the infrared light of shooting residue surface reflection infrared filter reaches objective. The infrared spectrum imaging system of the utility model is convenient to carry and use, and can be used for on-site investigation and inspection of large-area textile fabrics.
Description
Technical Field
The utility model belongs to the technical field of the shooting residue detects, concretely relates to infrared spectrum imaging system of inspection shooting residue.
Background
The inspection of shooting residues is a problem commonly encountered in gun cases and an important subject to be solved urgently in court science. The existing inspection methods probably include the following two methods:
1. The infrared photographing method comprises the following steps: the shooting residue was checked using an infrared camera, an infrared filter and an infrared film. The method can only use the optical filter with fixed wavelength (such as the band-pass optical filter of 750nm, 850nm and the like) and needs the matching of the photosensitive sheets with corresponding wavelengths to complete the inspection process, the inspection efficiency is low due to the limitation of the wavelength range, and the technology is rarely applied due to the limitation of the photosensitive material.
- 2 - 3 - 3 - 4 2- 3 2- - 4 4-2. the ion chromatography comprises the steps of extracting a test material by using deionized water, performing ultrasonic treatment, centrifuging and filtering, and detecting by using the ion chromatography, SO that the detection of inorganic anions (Cl < - >, NO 2 < - >, ClO 3 < - >, NO 3 < - >, SO 4 < - >, S2 > 3 < - >, SCN < - >, and ClO 4 < - >) in common shooting residues can be realized, and the method is a destructive testing method and has the risk of damaging the test material in the early treatment process.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the prior art, the utility model aims to provide an infrared spectrum imaging system for inspecting shooting residues.
The utility model discloses the technical scheme who adopts does:
The infrared spectrum imaging system for detecting the shooting residues comprises a visible light spectrum imager and an infrared filter, wherein the infrared filter is arranged at the front end of an objective lens of the visible light spectrum imager, and infrared light reflected from the surface of the shooting residues sequentially passes through the infrared filter and the objective lens.
Further, the infrared filter is an infrared liquid crystal filter.
Further, the infrared filter is a liquid crystal tunable filter, and the liquid crystal tunable filter is electrically connected with a computer of the visible light spectrum imager.
Further, infrared light reflected from the shooting residue surface is collimated by the collimating optical element to the infrared filter.
Further, the collimating optical element is a collimating lens.
The utility model has the advantages that:
(1) Placing a liquid crystal infrared filter at the front end of an objective lens of a visible light spectrum imager, opening a white light channel when the liquid crystal infrared filter is used, scanning the surface of the shooting residue under an incandescent lamp, searching a reference point after imaging for image processing, and determining a pseudo-color image and a spectrum curve of the shooting residue; the infrared spectrum imaging system of the utility model is convenient to carry and use, and can be used for on-site investigation and inspection of large-area textile fabrics; the images acquired by the infrared spectrum imaging system become clearer, and the interference of the fluorescence background on the detection can be reduced or even eliminated.
(2) The infrared spectrum inspection has the characteristic of no damage, and the material evidence can be prevented from being damaged by a chemical inspection method.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1-visible light spectrum imager; 11-an objective lens; 12-a CCD light-sensing element; 13-a computer; 2-an infrared filter; 3-shooting the residue surface.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, an infrared spectroscopy imaging system for inspecting shooting residues in this embodiment includes a visible light spectroscopy imager 1 and an infrared filter 2, the infrared filter is disposed at a front end of an objective lens 11 of the visible light spectroscopy imager, a light source irradiates a shooting residue surface (the light source may be a halogen lamp, which has a high infrared content), and infrared light reflected from the shooting residue surface 3 passes through the infrared filter and the objective lens in sequence. The infrared filter can be an infrared liquid crystal filter, the infrared filter and the visible light spectrum imager form a new infrared spectrum imaging system, and the infrared filter can reflect light in a specific wavelength region with a preset proportion and is used for searching the spectral characteristics of the shooting residues in the infrared region and determining the shooting residue target. The infrared filter can filter unnecessary background noise, images acquired by infrared spectrum imaging are clearer, and interference of a fluorescent background to detection is reduced or even eliminated.
The utility model discloses an infrared spectrum imaging system's aim at solve present infrared photographic method spectral range narrow and the complicated problem of inspection process and ion chromatography probably cause the drawback of destroying and can only inspect some inorganic matters to examining the material. The shooting residue is detected by adopting an infrared spectrum imaging method, a liquid crystal infrared filter is arranged at the front end of an objective lens of a visible light spectrum imager, a white light channel is opened when the liquid crystal infrared filter is used, the surface of the shooting residue is scanned under an incandescent lamp, a reference point is searched for image processing after imaging, and a pseudo-color image and a spectrum curve of the shooting residue are determined.
The infrared spectrum imaging technology can be used for detecting partial pollutants on the textile, and has superiority compared with other similar technologies. Utilize ordinary infrared light spectrum imaging inspection technique can't inspect out to some materials, however the utility model discloses an infrared light spectrum imaging system can be to that the unable material that has certain infrared characteristic of inspecting out of part infrared light can be clear, effectual inspection comes out, can remove the complicated procedure of taking a picture at different wavelengths many times in the infrared photograph from, the utility model discloses an infrared light spectrum imaging system is more swift. Meanwhile, the infrared spectrum inspection has the characteristic of no damage, and the material evidence can be prevented from being damaged by a chemical inspection method. The method is a new idea and a new method in the material evidence inspection field, is a very valuable method, and brings a new development opportunity for the criminal material evidence inspection technology.
In this embodiment, in order to increase the coupling efficiency of the reflected infrared light, the beam divergence angle is reduced, and the infrared light reflected from the shooting residue surface is collimated by the collimating optical element to the infrared filter. In particular, the collimating optical element is a collimating lens.
the liquid crystal tunable filter can make the center wavelength of the light source continuously tunable in the range of 650-1100 nm. Coupling an infrared liquid crystal filter and a CCD photosensitive element 12 of a visible light spectrum imager, connecting a computer 13 of the visible light spectrum imager, opening a nuance multispectral image analysis system and an infrared spectrum imaging system of the visible light spectrum imager, opening a white light channel when the infrared spectrum imager is used, scanning the surface of the shooting residue under an incandescent lamp, searching a reference point for image processing after imaging, and determining a pseudo-color image and a spectrum curve of the shooting residue.
The utility model discloses a visible light spectrum imager can select for use CRI (Cambridge Research & Instrumentation) company's the multispectral imaging system of Nuance, and infrared liquid crystal filter chooses for use CRI company's the infrared liquid crystal filter of Varispec.
The infrared spectrum imaging system of the utility model is convenient to carry and use, and can be used for on-site investigation and inspection of large-area textile fabrics; secondly, the image of the infrared spectrum imaging acquisition system becomes clearer, and the interference of the fluorescence background on the detection can be reduced or even eliminated; finally, infrared spectrum imaging is utilized to obtain an image with obvious difference between the shaped object and the bearing object, and meanwhile, the components or the types of the shaped object can be confirmed through analysis of an infrared spectrum curve.
The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.
Claims (5)
1. An infrared spectroscopy imaging system for inspecting shooting residues, comprising: the infrared light source shooting device comprises a visible light spectrum imager and an infrared filter, wherein the infrared filter is arranged at the front end of an objective lens of the visible light spectrum imager, and infrared light reflected from a shooting residue surface sequentially passes through the infrared filter and the objective lens.
2. An infrared spectroscopy imaging system for inspecting shooting residue according to claim 1, wherein: the infrared filter is an infrared liquid crystal filter.
3. An infrared spectroscopy imaging system for inspecting shooting residue according to claim 2, wherein: the infrared filter is a liquid crystal tunable filter, and the liquid crystal tunable filter is electrically connected with a computer of the visible light spectrum imager.
4. Infrared spectroscopic imaging system for the inspection of shooting residues according to claim 1 or 3, characterized in that: infrared light reflected from the shooting residue surface is collimated by a collimating optical element to the infrared filter.
5. An infrared spectroscopy imaging system for inspecting shooting residue according to claim 4, wherein: the collimating optical element is a collimating lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821983989.2U CN209764705U (en) | 2018-11-28 | 2018-11-28 | infrared spectrum imaging system for detecting shooting residues |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821983989.2U CN209764705U (en) | 2018-11-28 | 2018-11-28 | infrared spectrum imaging system for detecting shooting residues |
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| Publication Number | Publication Date |
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| CN209764705U true CN209764705U (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821983989.2U Expired - Fee Related CN209764705U (en) | 2018-11-28 | 2018-11-28 | infrared spectrum imaging system for detecting shooting residues |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474131A (en) * | 2020-04-24 | 2020-07-31 | 张苗苗 | Infrared spectrum imaging detection method for shooting residues |
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2018
- 2018-11-28 CN CN201821983989.2U patent/CN209764705U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474131A (en) * | 2020-04-24 | 2020-07-31 | 张苗苗 | Infrared spectrum imaging detection method for shooting residues |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191210 Termination date: 20201128 |
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| CF01 | Termination of patent right due to non-payment of annual fee |