Multi-light source portable document inspection lens

Abstract

The utility model provides a multi-light source portable document inspection lens, which relates to the technical field of inspection instruments for criminal investigation work, including a lens, a fixing device is provided at the rear end of the lens, a color filter is movably connected to the fixing device, a plurality of light sources are provided on the front face of the lens, a power source is provided inside the housing of the lens, and a power charging interface and a light source switching switch are provided outside the housing of the lens. Using the multi-light source portable document inspection lens of the utility model, a mobile phone is fixed on the base of a tripod, and the document evidence can be magnified for observation and photographed for evidence collection through the mobile phone lens. For suspicious traces, an ultraviolet or infrared light source can be used to approach the surface of the document evidence, and the camera function of the mobile phone is used to adjust the focal length of the mobile phone lens so that the surface of the document is clearly displayed on the mobile phone display screen, thereby observing the image and photographing and fixing it.

Description

Technical Field

[0001] The utility model relates to the technical field of criminal investigation inspection instruments, in particular to a multi-light source portable document inspection lens. Background Art

[0002] The basic task of document examination is to apply the theoretical and technical methods of document examination to study the documentary evidence in specific cases, determine the relationship between the document and the facts of the case, and between the document and the parties or suspects, so as to provide clues and evidence for the investigation, prosecution and trial of the case.

[0003] The objects of document inspection mainly include: handwriting, seals, printed images, stains and changes, speech recognition, document formation time, red and ink sequence, etc., among which handwriting, seals, printed images, stains and changes all have potential traces. With the advancement of science and technology and the development of the Internet, criminal methods are constantly updated and iterated. High-imitation seals, high-imitation certificates, mechanical arms imitate signatures, scratches and alterations, additions and changes to pages, and other criminal methods are emerging in an endless stream. The ordinary small magnifying glass carried by document inspection technicians during the on-site inspection can no longer meet the actual situation, especially when grassroots police officers encounter the above-mentioned document inspection professional problems during the process of handling cases and collecting evidence in other places. They have no idea where to start in the face of a large amount of materials and cannot select fixed and valuable inspection materials and samples for inspection.

[0004] The non-destructive testing instruments and equipment commonly used in document inspection work include document inspection instruments and stereo microscopes, which are large instruments and not easy to carry. Currently, the common products on the market include mobile phone clip-on microscopes / magnifiers, handheld / sitting magnifiers with manual zoom and LED+UV lights, etc. The advantages of each product cannot be taken into account, which is not convenient for use in field work. Utility Model Content

[0005] The purpose of the utility model is to provide a multi-light source portable document inspection lens, which can be used as an external magnifying lens miniature document inspection instrument in conjunction with a mobile phone lens, is easy to carry, can quickly discover suspicious points in document evidence during the case handling process, meet the initial inspection of document evidence, and improve identification efficiency.

[0006] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0007] Solution 1:

[0008] A multi-light source portable document inspection lens, characterized in that it includes a lens, a fixing device is provided at the rear end of the lens, a color filter is movably connected to the fixing device, a plurality of light sources are provided on the front end surface of the lens, a power source is provided inside the lens housing, and a power charging interface and a light source switching switch are provided outside the lens housing.

[0009] Improvement on the above technical solution: the lens is a macro magnification lens, and the light sources on the front end of the lens are LED light source, 254nm ultraviolet light source, 365nm ultraviolet light source, and 800nm ​​infrared light source.

[0010] Further improvement to the above technical solution: the fixing device at the rear end of the lens is a fixing base, one end of the fixing base is fixedly connected to the lens, and the other end of the fixing base is provided with a threaded interface, and the color filter is fixed to the fixing base through the threaded interface.

[0011] Option 2:

[0012] A multi-light source portable document inspection lens, characterized in that it includes a lens, a fixing device is provided at the rear end of the lens, a color filter is movably connected to the fixing device, a plurality of light sources are provided on the front end surface of the lens, a power source is provided inside the lens housing, and a power charging interface and a light source switching switch are provided outside the lens housing.

[0013] Improvement on the above technical solution: the lens is a macro magnification lens, and the light sources on the front end of the lens are LED light source, 254nm ultraviolet light source, 365nm ultraviolet light source, and 800nm ​​infrared light source.

[0014] Further improvement of the above technical solution: the fixing device at the rear end of the lens is a fixed base, one end of the fixed base is fixedly connected to the lens, and the other end of the fixed base is provided with a buckle, and the buckle is two oppositely arranged arc-shaped fixed frames, one side of the two arc-shaped fixed frames is hinged and fixed, and the other side is connected by a connecting buckle, and the color filter is fixed to the fixed base by the buckle.

[0015] Option 3:

[0016] A multi-light source portable document inspection lens, characterized in that it includes a lens, a fixing device is provided at the rear end of the lens, a color filter is movably connected to the fixing device, a plurality of light sources are provided on the front end surface of the lens, a power source is provided inside the lens housing, and a power charging interface and a light source switching switch are provided outside the lens housing.

[0017] Improvement on the above technical solution: the lens is a macro magnification lens, and the light sources on the front end of the lens are LED light source, 254nm ultraviolet light source, 365nm ultraviolet light source, and 800nm ​​infrared light source.

[0018] Further improvement of the above technical solution: the fixing device at the rear end of the lens is a fixed base, one end of the fixed base is fixedly connected to the lens, an open groove is provided on the outer wall of the other end of the fixed base, a cavity connected to the open groove is provided in the fixed base, and the color filter is fixed in the cavity through the open groove.

[0019] Further improvement to the above technical solution: the outer edge of the color filter is made of magnetic metal material, a magnetic material is provided in the opening groove of the fixed base, and the color filter is fixed in the fixed base by magnetic attraction.

[0020] The lens described in the above three schemes has a mobile phone fixing bracket outside the lens, and the mobile phone fixing bracket includes a frame, one side of the frame in the width direction is movably connected to a clamping plate through a spring and a spring bracket, and the clamping plate can move up and down under the tension of the spring, and the other side in the width direction of the frame is fixedly connected to a clamping plate, and the frame is provided with a support rod parallel to the side of the frame in the length direction, and the two ends of the support rod are fixed on the two sides of the frame in the width direction. The support rod is provided with a mounting seat that can slide on the support rod, and the mounting seat is provided with a mounting hole, and the lens is fixed on the mounting seat by installation. The mounting hole is provided with a thread, and the outer wall of the lens is provided with an external thread corresponding thereto, and the lens and the mounting hole are fixedly connected by a thread. The bottom of the mobile phone fixing bracket for mounting the lens is provided with a mounting hole, and a tripod or a hand-held rod is installed in conjunction with the mounting hole. Beneficial Effects

[0021] By using the multi-light source portable document inspection lens of the utility model, a mobile phone is fixed on the base of a tripod, and the document evidence can be magnified and observed and photographed through the mobile phone lens. For suspicious traces, an ultraviolet or infrared light source can be used to approach the surface of the document evidence, and the mobile phone's built-in camera function is used to adjust the focal length of the mobile phone lens so that the surface of the document is clearly displayed on the mobile phone display screen, so that the image can be observed and photographed.

[0022] Compared with the prior art, the utility model is easy to operate, can intuitively observe and photograph document evidence, and effectively improves the efficiency of identification. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of embodiment 1 of the present utility model.

[0024] Figure 2 Schematic diagram of the structure of the lens in the first embodiment.

[0025] Figure 3 This is a structural schematic diagram of the second embodiment of the present utility model.

[0026] Figure 4 It is a schematic diagram of the structure of the lens in the second embodiment.

[0027] Figure 5 This is a structural schematic diagram of embodiment 3 of the present utility model.

[0028] Figure 6 Schematic diagram of the structure of the lens in the third embodiment.

[0029] Figure 7This is a structural diagram of a mobile phone fixing bracket.

[0030] Figure 8 This is a structural diagram of a mobile phone fixing bracket.

[0031] In the figure: lens 1, fixing device 2, color filter 3, light source 4, power supply 5, power charging interface 6, light source switching switch 7, fixing base 2-1, threaded interface 2-2, buckle 2-3, opening slot 2-4, mobile phone fixing bracket 8, frame 8-1, spring and spring bracket 8-2, clamping plate 8-3, clamping plate 8-4, support rod 8-5, mounting seat 8-6, mounting hole 8-7, tripod 9. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Solution 1:

[0034] like Figure 1 , 2 The multi-light source portable document inspection lens of the utility model shown in , 7 and 8 comprises a lens 1, a fixing device 2 is provided at the rear end of the lens 1, a color filter 3 is movably connected to the fixing device 2, 12 light sources 4 are provided on the front end surface of the lens 1, a power source 5 is provided inside the housing of the lens 1, and a power charging interface 6 and a light source switching switch 7 are provided outside the housing of the lens 1.

[0035] The lens 1 is a macro magnifying lens, and the light sources 4 on the front end of the lens 1 are respectively 3 LED light sources, 3 254nm ultraviolet light sources, 3 365nm ultraviolet light sources, and 3 800nm ​​infrared light sources.

[0036] The fixing device 2 at the rear end of the lens 1 is a fixing base 2-1, one end of the fixing base 2-1 is fixedly connected to the lens 1, and the other end of the fixing base 2-1 is provided with a threaded interface 2-2, and the color filter 3 is fixed on the fixing base 2-1 through the threaded interface 2-2.

[0037] The lens 1 is provided with a mobile phone fixing bracket 8 on the outside. The mobile phone fixing bracket 8 includes a frame 8-1. A clamping plate 8-3 is movably connected to one side of the frame 8-1 in the width direction through a spring and a spring bracket 8-2. The clamping plate 8-3 can move up and down under the action of the spring tension. A clamping plate 8-4 is fixedly connected to the other side of the frame 8-1 in the width direction. A support rod 8-5 parallel to the side of the frame 8-1 in the length direction is provided inside the frame 8-1. The two ends of the support rod 8-5 are fixed on the two sides of the frame in the width direction. The support rod 8-5 is provided with a mounting seat 8-6 that can slide on the support rod. The mounting seat 8-6 is provided with a mounting hole 8-7. The lens 1 is fixed on the mounting seat 8-6 through the mounting hole 8-7. The mounting hole 8-7 is provided with a thread, and the outer wall of the lens 1 is provided with an external thread corresponding thereto. The lens 1 is fixedly connected to the mounting hole 8-7 by a thread. The bottom of the mobile phone fixing bracket 8 for mounting the lens is provided with a mounting hole, and a tripod 9 is installed in the mounting hole. In actual use, the tripod can also be replaced with a hand-held rod as needed.

[0038] Option 2:

[0039] like Figure 3 , 4 The multi-light source portable document inspection lens of the utility model shown in , 7 and 8 comprises a lens 1, a fixing device 2 is provided at the rear end of the lens 1, a color filter 3 is movably connected to the fixing device 2, 12 light sources 4 are provided on the front end surface of the lens 1, a power source 5 is provided inside the housing of the lens 1, and a power charging interface 6 and a light source switching switch 7 are provided outside the housing of the lens 1.

[0040] The lens 1 is a macro magnifying lens, and the light sources 4 on the front end of the lens 1 are respectively 3 LED light sources, 3 254nm ultraviolet light sources, 3 365nm ultraviolet light sources, and 3 800nm ​​infrared light sources.

[0041] The fixing device 2 at the rear end of the lens 1 is a fixing base 2-1, one end of the fixing base 2-1 is fixedly connected to the lens 1, and the other end of the fixing base 2-1 is provided with a buckle 2-3, the buckle 2-3 is two arc-shaped fixed frames arranged opposite to each other, one side of the two arc-shaped fixed frames is hinged and fixed, and the other side is connected by a connecting buckle, and the color filter 3 is fixed on the fixing base 2-1 by the buckle 2-3.

[0042] The lens 1 is provided with a mobile phone fixing bracket 8 on the outside. The mobile phone fixing bracket 8 includes a frame 8-1. A clamping plate 8-3 is movably connected to one side of the frame 8-1 in the width direction through a spring and a spring bracket 8-2. The clamping plate 8-3 can move up and down under the action of the spring tension. A clamping plate 8-4 is fixedly connected to the other side of the frame 8-1 in the width direction. A support rod 8-5 parallel to the side of the frame 8-1 in the length direction is provided inside the frame 8-1. The two ends of the support rod 8-5 are fixed on the two sides of the frame in the width direction. The support rod 8-5 is provided with a mounting seat 8-6 that can slide on the support rod. The mounting seat 8-6 is provided with a mounting hole 8-7. The lens 1 is fixed on the mounting seat 8-6 through the mounting hole 8-7. The mounting hole 8-7 is provided with a thread, and the outer wall of the lens 1 is provided with an external thread corresponding thereto. The lens 1 is fixedly connected to the mounting hole 8-7 by a thread. The bottom of the mobile phone fixing bracket 8 for mounting the lens is provided with a mounting hole, and a tripod 9 is installed in the mounting hole. In actual use, the tripod can also be replaced with a hand-held rod as needed.

[0043] Option 3:

[0044] like Figure 5 , 6 The multi-light source portable document inspection lens of the utility model shown in , 7 and 8 comprises a lens 1, a fixing device 2 is provided at the rear end of the lens 1, a color filter 3 is movably connected to the fixing device 2, 12 light sources 4 are provided on the front end surface of the lens 1, a power source 5 is provided inside the housing of the lens 1, and a power charging interface 6 and a light source switching switch 7 are provided outside the housing of the lens 1.

[0045] The lens 1 is a macro magnifying lens, and the light sources 4 on the front end of the lens 1 are respectively 3 LED light sources, 3 254nm ultraviolet light sources, 3 365nm ultraviolet light sources, and 3 800nm ​​infrared light sources.

[0046] The fixing device 2 at the rear end of the lens 1 is a fixing base 2-1, one end of the fixing base 2-1 is fixedly connected to the lens 1, an opening groove 2-4 is provided on the outer wall of the other end of the fixing base 2-1, and a cavity connected to the opening groove 2-4 is provided in the fixing base 2-1, and the color filter 3 is fixed in the cavity through the opening groove 2-4.

[0047] The outer edge of the color filter 3 is made of magnetic metal material, and a magnetic material is provided in the opening groove 2-4 of the fixed base 2-1. The color filter 3 is fixed in the fixed base 2-1 by magnetic attraction.

[0048] The lens 1 is provided with a mobile phone fixing bracket 8 on the outside. The mobile phone fixing bracket 8 includes a frame 8-1. A clamping plate 8-3 is movably connected to one side of the frame 8-1 in the width direction through a spring and a spring bracket 8-2. The clamping plate 8-3 can move up and down under the action of the spring tension. A clamping plate 8-4 is fixedly connected to the other side of the frame 8-1 in the width direction. A support rod 8-5 parallel to the side of the frame 8-1 in the length direction is provided inside the frame 8-1. The two ends of the support rod 8-5 are fixed on the two sides of the frame in the width direction. The support rod 8-5 is provided with a mounting seat 8-6 that can slide on the support rod. The mounting seat 8-6 is provided with a mounting hole 8-7. The lens 1 is fixed on the mounting seat 8-6 through the mounting hole 8-7. The mounting hole 8-7 is provided with a thread, and the outer wall of the lens 1 is provided with an external thread corresponding thereto. The lens 1 is fixedly connected to the mounting hole 8-7 by a thread. The bottom of the mobile phone fixing bracket 8 for mounting the lens is provided with a mounting hole, and a tripod 9 is installed in the mounting hole. In actual use, the tripod can also be replaced with a hand-held rod as needed.

[0049] When in use, the LED white light is used to magnify and observe the cross-stroke / stroke order characteristics of handwriting, ink characteristics of images and texts, stain change characteristics, scratch characteristics, etc.; 254nm / 365nm ultraviolet light is used to observe the faded handwriting characteristics of documents, and the anti-counterfeiting characteristics of currency, tickets, and certificates; 254nm / 365nm ultraviolet light is equipped with 250nm-270nm / 300nm-350nm filters to observe sweat and fingerprints; 800nm ​​infrared light is equipped with 625nm-850nm filters to observe file additions, alterations, and the appearance of text in burned documents, etc.

[0050] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. Multi-light source portable document inspection lens, characterized by: The invention comprises a lens, wherein a fixing device is provided at the rear end of the lens, a color filter is movably connected to the fixing device, a plurality of light sources are provided on the front end surface of the lens, a power source is provided inside the lens shell, and a power charging interface and a light source switching switch are provided outside the lens shell.

2. The multi-light source portable document inspection lens according to claim 1, characterized in that: The lens is a macro magnifying lens, and the light sources on the front end of the lens are LED light source, 254nm ultraviolet light source, 365nm ultraviolet light source, and 800nm ​​infrared light source.

3. The multi-light source portable document inspection lens according to claim 1 or 2, characterized in that: The fixing device at the rear end of the lens is a fixing base, one end of the fixing base is fixedly connected to the lens, and the other end of the fixing base is provided with a threaded interface, and the color filter is fixed on the fixing base through the threaded interface.

4. The multi-light source portable document inspection lens according to claim 1 or 2, characterized in that: The fixing device at the rear end of the lens is a fixed base, one end of the fixed base is fixedly connected to the lens, and the other end of the fixed base is provided with a buckle, which is two arc-shaped fixed frames arranged opposite to each other. One side of the two arc-shaped fixed frames is hinged and fixed, and the other side is connected by a connecting buckle, and the color filter is fixed to the fixed base by the buckle.

5. The multi-light source portable document inspection lens according to claim 1 or 2, characterized in that: The fixing device at the rear end of the lens is a fixing base, one end of which is fixedly connected to the lens, an opening groove is provided on the outer wall of the other end of the fixing base, a cavity connected to the opening groove is provided in the fixing base, and the color filter is fixed in the cavity through the opening groove.

6. The multi-light source portable document inspection lens according to claim 5, characterized in that: The outer edge of the color filter is made of magnetic metal material, and a magnetic material is arranged in the opening groove of the fixed base. The color filter is fixed in the fixed base by magnetic attraction.

7. The multi-light source portable document inspection lens according to claim 1 or 2, characterized in that: A mobile phone fixing bracket is provided outside the lens, and the mobile phone fixing bracket includes a frame, one side of the frame in the width direction is movably connected with a clamping plate through a spring and a spring bracket, the clamping plate can move up and down under the action of the spring tension, and the other side in the width direction of the frame is fixedly connected with the clamping plate, and a support rod parallel to the side edge in the length direction of the frame is provided inside the frame, two ends of the support rod are fixed on two side edges in the width direction of the frame, a mounting seat that can slide on the support rod is provided on the support rod, a mounting hole is provided on the mounting seat, and the lens is fixed on the mounting seat by installation.

8. The multi-light source portable document inspection lens according to claim 7, characterized in that: The mounting hole is provided with a thread, the outer wall of the lens is provided with an external thread corresponding to the thread, and the lens and the mounting hole are fixedly connected via the thread.

9. The multi-light source portable document inspection lens according to claim 7, characterized in that: The bottom of the mobile phone fixing bracket for mounting the lens is provided with a mounting hole, and a tripod or a hand-held rod is mounted in cooperation with the mounting hole.

Images