CN215931684U - A device that is used for criminal investigation to detect fingerprint to shoot - Google Patents
A device that is used for criminal investigation to detect fingerprint to shoot Download PDFInfo
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- CN215931684U CN215931684U CN202121817753.3U CN202121817753U CN215931684U CN 215931684 U CN215931684 U CN 215931684U CN 202121817753 U CN202121817753 U CN 202121817753U CN 215931684 U CN215931684 U CN 215931684U
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Abstract
A device for taking a picture of a fingerprint for criminal investigation detection, characterized in that: the lens comprises a housin, be provided with the light source in the casing, set gradually logical light orifice plate, incident optical lens group and spectroscope on light direction of propagation, the upper end of spectroscope has set gradually the reverberation optical lens group and has taken a picture a section of thick bamboo, the lower extreme of spectroscope is provided with the window of shooing, the light source can move in vertical direction, logical light orifice plate can move on the horizontal direction, still be provided with in the casing and graze the shot-light. The fingerprint photographing device provided by the utility model can effectively remove the complex background on the smooth surface, extracts the fingerprint with obvious and clear contrast, and has the advantages of simple operation, portability and obvious effect.
Description
Technical Field
The utility model relates to a fingerprint photographing device for criminal investigation detection, which is used for finding and extracting biological traces such as fingerprints needing to be related in criminal investigation.
Background
In the current criminal investigation site investigation process, fingerprints left on the site or related material evidence are often required,
Taking pictures of biological traces such as palm prints and the like. When taking a picture of a finger and palm print, the finger and palm print is taken and extracted by the technical means of directional reflection lighting technology, dark field lighting technology, uniform lighting technology, grazing incidence lighting technology and the like.
In a complex background, the directional reflection illumination technology can be used for effectively removing the complex background on the surface of the object, but the directional reflection technology has various requirements in practical operation, such as selection of a light source, adjustment of a beam splitter angle, distance between a photographing camera and the surface of the object, perpendicularity between the photographing camera and the surface of the object and the like, and the effect of the directional reflection technology in practical application is not ideal due to the factors.
Under a single background, the dark field is used for illuminating the desirable clear finger and palm print, but the dark field requires a light source to illuminate at a small deflection angle, the illumination is uniform, and in actual operation, the fixed small deflection angle is difficult to maintain manually.
Good photographing effect is desirable for the additive and subtractive fingerprints on dust by using grazing incidence illumination technology. When the grazing incidence illumination technology is used, a parallel light source is needed for illumination, and the angle is finely adjusted to enable the trace and the background to achieve the maximum contrast.
In the prior art, no matter the directional reflection illumination technology, the dark field illumination technology or the grazing incidence illumination technology, fingerprints on the surface of an object can only be photographed in a single mode, and the fingerprint can not be quickly and conveniently switched according to field requirements in actual use, so that technicians need to assemble various evidence obtaining devices in actual investigation to meet the actual requirements. The three photographing technologies all need to obtain a good photographing effect in a dark environment, so that the photographing quality of the three photographing technologies is not high generally in practical application.
Disclosure of Invention
The present invention provides a fingerprint photographing device for criminal investigation detection, which solves the problems in the background art.
In order to achieve the purpose, the multifunctional mobile phone integrates multiple photographing modes, and is simple to operate and convenient to carry. The utility model is realized by the following technology:
a device for taking a picture of a fingerprint for criminal investigation detection, characterized in that: the lens comprises a housin, be provided with the light source in the casing, set gradually logical light orifice plate, incident optical lens group and spectroscope on light direction of propagation, the upper end of spectroscope has set gradually the reverberation optical lens group and has taken a picture a section of thick bamboo, the lower extreme of spectroscope is provided with the window of shooing, the light source can move in vertical direction, logical light orifice plate can move on the horizontal direction, still be provided with in the casing and graze the shot-light.
Preferably, the light emitting area of the light source can be increased or decreased; the light emitting brightness of the light source is adjustable.
Preferably, the light source, the light-transmitting hole plate and the incident light optical lens group are coaxial.
Preferably, the aperture size of the light-transmitting pore plate is adjustable. The size of the aperture of the light through hole can be adjusted by replacing different light through hole plates.
Preferably, the reflected light optical lens group and the photographing barrel are coaxial.
Preferably, the beam splitter is adjustable in angle; the glancing lamp is positioned on one side of the bottom of the shell, and the angle of a light source of the glancing lamp is adjustable.
Preferably, the angle of the spectroscope is adjusted through a spectroscope rotating hand wheel, and the angle of the light source is adjusted through a glancing lamp rotating hand wheel. Specifically, a spectroscope rotating hand wheel is rotationally connected with the shell, and the spectroscope is fixedly connected with the spectroscope rotating hand wheel; the grazing reflector lamp rotating hand wheel is rotatably connected with the shell, and the grazing reflector lamp is fixedly connected with the grazing reflector lamp rotating hand wheel.
Preferably, the light source is arranged on the stepping sliding table I in the vertical direction; and the light through hole plate is arranged on the stepping sliding table II in the horizontal direction. Step-by-step slip table I and step-by-step slip table II are by motor drive's lead screw slider mechanism, the light source is fixed on slider I, it fixes on slider II to lead to the worn-out fur.
Preferably, a battery is fixedly arranged in the shell and supplies power to the light source, the glancing lamp, the stepping sliding table I and the stepping sliding table II.
Preferably, light absorption cotton is attached to the inner portion of the shell.
The fingerprint photographing device for criminal investigation detection is simple to operate, light and portable, integrates multiple modes, realizes extraction and photographing under different objects, and has an obvious effect.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a first partial schematic view of the structure of FIG. 1;
FIG. 3 is a second partial schematic view of the structure of FIG. 1;
FIG. 4 is a schematic view of a light hole connection structure;
fig. 5 is a schematic view of a light source connection structure.
Detailed Description
The fingerprint photographing device for criminal investigation detection implemented by the utility model will be described in more detail below with reference to the accompanying drawings, so that the implementation effect of the utility model is clearer, and the understanding of the embodiment of the utility model is increased. The following embodiments are merely illustrative of the present invention and do not limit the uniqueness of the design.
The structural design and the working principle of a fingerprint photographing device for criminal investigation implemented by the utility model will be described in detail with reference to the accompanying drawings.
As shown in the figure, a device that is used for criminal investigation to detect fingerprint to shoot, includes casing 11, be provided with light source 1 in the casing 11, light passing hole board 2, incident optical lens group 3 and spectroscope 4 have set gradually in the light direction of propagation, the upper end of spectroscope 4 has set gradually reverberation optical lens group 5 and a section of thick bamboo 8 of shooing, the lower extreme of spectroscope 4 is provided with window 14 of shooing, light source 1 can move in vertical direction, light passing hole board 2 can move on the horizontal direction, still be provided with glancing lamp 9 in the casing 11.
Further, the light emitting area of the light source 1 can be increased or decreased; the light emitting brightness of the light source 1 is adjustable. The light emitting area and the light emitting brightness of the light source 1 are adjusted by the prior art, and are not described in detail herein.
Further, the light source 1, the light transmitting hole plate 2 and the incident light optical lens group 3 are coaxial.
Further, the aperture size of the light passing hole plate 2 is adjustable. The size of the aperture of the light through hole can be adjusted by replacing different light through hole plates 2.
Further, the reflective optical lens group 5 and the photographing cylinder 8 are coaxial, and the central point of the photographing window 14 is on the axis of the photographing cylinder 8.
Further, the spectroscope 4 is adjustable in angle; the glancing light 9 is positioned on one side of the bottom of the shell, and the angle of a light source of the glancing light 9 is adjustable.
Further, the angle of the spectroscope 4 is adjusted through a spectroscope rotating hand wheel 6, and the light source angle of the glancing lamp 9 is adjusted through a glancing lamp rotating hand wheel 7. Specifically, a spectroscope rotating hand wheel 6 is rotationally connected with a shell 11, and the spectroscope 4 is fixedly connected with the spectroscope rotating hand wheel 6; the grazing reflector lamp rotating hand wheel 7 is rotatably connected with the shell 11, and the grazing reflector lamp 9 is fixedly connected with the grazing reflector lamp rotating hand wheel 7.
Further, the light source 1 is arranged on a stepping sliding table I13 in the vertical direction; and the light passing hole plate 2 is arranged on the stepping sliding table II 12 in the horizontal direction. Step-by-step slip table I13 and step-by-step slip table II 12 are the lead screw slider mechanism by motor drive, light source 1 is fixed on slider I, logical light orifice plate 2 is fixed on slider II.
Further, a battery 10 is fixedly arranged in the shell 11, and the battery 10 supplies power to the light source 1, the glancing lamp 9, the stepping sliding table I13 and the stepping sliding table II 12.
When the photo is taken in the directional reflection mode, the light source 1 is turned on, the glancing lamp 9 is turned off, and light passes through the light through hole in the movable light through hole plate 2 along the horizontal direction and passes through the incident light lens group 3 with the dodging amplification function to form light spots with uniform brightness. The light spot is projected on the spectroscope 4, irradiates the photographing window 14, and after entering the reflected light lens group through reflection, the mobile phone, the flat panel or the camera can shoot a clearly visible fingerprint through the photographing cylinder 8.
Under the directional reflection mode, for avoiding the scattering of light and the diffuse reflection that forms with casing 11 inner wall to cause the interference to incident light to influence the fingerprint and shoot and draw the effect, casing 11 is inside can paste the extinction cotton, absorbs the scattered light, prevents that the scattered light from passing through incident light lens group and getting into window 14 departments of shooing.
Preferably, in the directional reflection photographing process, the light through hole plate 2 can be horizontally moved along the light propagation direction facing to the complex backgrounds on the surfaces of different objects, the complex backgrounds on the surfaces of the objects can be effectively removed to the greatest extent by adjusting the distance between the light through hole 2 and the light source 1 and adjusting the angle and the size of light entering the incident light lens group 3, and the photographed fingerprints are clear visible black fingerprints under a single white background.
In a dark field mode, the light source 1 is turned on, the glancing lamp 9 is turned off, light passes through the light through hole in the movable light through hole plate 2 along the horizontal direction and passes through the incident light lens group 3 with the dodging and amplifying function to form light spots with uniform brightness to irradiate the spectroscope 4, the light spots are reflected to the photographing window 14, and a mobile phone, a tablet or a camera can photograph through the photographing barrel 8.
Preferably, in the dark field photographing process, the spectroscope rotating hand wheel 6 is rotated, so that the size of the included angle in the vertical direction of the spectroscope 4 is changed along with the rotation of the spectroscope rotating hand wheel 6, and the angle and the size of the light spot reflected to the photographing window 14 are changed along with the change of the included angle. When the spectroscope rotating hand wheel 6 rotates to a proper angle, the shot fingerprint is a clear and visible bright white fingerprint under a single dark background.
In the dark field photographing process, the light source 1 can be moved up and down in the vertical direction, meanwhile, the size of the light emitting area of the light source 1 is adjusted in an auxiliary mode, the fingerprint definition and the contrast of an observation area can be finely adjusted, and the photographed fingerprint effect is better.
When taking a picture in the glancing light mode, the light source 1 is turned off, the glancing light 9 is turned on, and the spectroscope rotating hand wheel 6 is rotated to enable the included angle in the vertical direction of the spectroscope 4 to be 0 (namely, the spectroscope 4 is vertical to the horizontal direction). The light irradiates the photographing window 14 along the direction with an included angle of 10-30 degrees with the horizontal direction, and the mobile phone, the flat panel or the camera can shoot clearly visible fingerprints through the photographing cylinder 8 and the reflected light lens group 5.
Preferably, in the glancing light photographing process, the hand wheel 7 is rotated by rotating the glancing light, the angle of the glancing light 9 irradiating the surface of the object to be observed is changed, and the mobile phone, the flat panel or the camera can photograph the clear layered or layered fingerprint through the photographing cylinder 8 and the reflecting light lens group 5.
Although the fingerprint photographing apparatus for criminal investigation detection according to the present invention has been described and illustrated in terms of functions, structures, technical solutions, design principles, etc., the above description and illustration is only exemplary and not restrictive, and those skilled in the relevant art can change, replace, modify, etc. the above examples without departing from the scope of the present invention.
Claims (10)
1. A device for taking a picture of a fingerprint for criminal investigation detection, characterized in that: the lens comprises a housin, be provided with the light source in the casing, set gradually logical light orifice plate, incident optical lens group and spectroscope on light direction of propagation, the upper end of spectroscope has set gradually the reverberation optical lens group and has taken a picture a section of thick bamboo, the lower extreme of spectroscope is provided with the window of shooing, the light source can move in vertical direction, logical light orifice plate can move on the horizontal direction, still be provided with in the casing and graze the shot-light.
2. The apparatus for criminal investigation detection fingerprint photographing according to claim 1, wherein: the spectroscope is adjustable in angle.
3. The apparatus for criminal investigation detection fingerprint photographing according to claim 1, wherein: the light emitting area of the light source can be increased or decreased; the light emitting brightness of the light source is adjustable.
4. The apparatus for criminal investigation detection fingerprint photographing according to claim 1, wherein: the light source, the light-transmitting pore plate and the incident light optical lens group are coaxial; the reflected light optical lens group and the photographing barrel are coaxial.
5. The apparatus for criminal investigation detection fingerprint photographing according to claim 1, wherein: the aperture size of the light-passing pore plate is adjustable.
6. The apparatus for criminal investigation detection fingerprint photographing according to claim 2, wherein: the glancing lamp is positioned on one side of the bottom of the shell, and the angle of a light source of the glancing lamp is adjustable.
7. The apparatus for criminal investigation detection fingerprint photographing according to claim 6, wherein: the angle of the spectroscope is adjusted through a spectroscope rotating hand wheel, and the angle of the light source is adjusted through a glancing lamp rotating hand wheel.
8. The apparatus for criminal investigation detection fingerprint photographing according to claim 1, wherein: the light source is arranged on the stepping sliding table I in the vertical direction; and the light through hole plate is arranged on the stepping sliding table II in the horizontal direction.
9. The apparatus for criminal investigation detection fingerprint photographing according to claim 8, wherein: and a battery is fixedly arranged in the shell and supplies power to the light source, the glancing lamp, the stepping sliding table I and the stepping sliding table II.
10. The apparatus for criminal investigation detection fingerprint photographing according to claim 1, wherein: light absorbing cotton is attached to the inner portion of the shell.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121471084 | 2021-06-30 | ||
| CN2021214710849 | 2021-06-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215931684U true CN215931684U (en) | 2022-03-01 |
Family
ID=80398741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121817753.3U Expired - Fee Related CN215931684U (en) | 2021-06-30 | 2021-08-05 | A device that is used for criminal investigation to detect fingerprint to shoot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215931684U (en) |
-
2021
- 2021-08-05 CN CN202121817753.3U patent/CN215931684U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220301 |