CN208688980U - A kind of physical evidence exploration instrument - Google Patents

Abstract

The utility model relates to a kind of physical evidence exploration instruments, including light source module, image capture module and shell, the light source module and described image acquisition module are arranged in the shell, the light source module is used to acquire the image or image information that excitation light source irradiates lower trace evidence for generating excitation light source, described image acquisition module.This physical evidence exploration instrument has the characteristics that compact-sized, small in size, light-weight；Not only the center of irradiation light spot and the center of image capture module effective viewing field can be made to be overlapped, so that fluorescence signal acquisition is more efficient, material evidence feature is apparent, and only needs a people that can be completed at the same time reconnoitring and evidence obtaining work for material evidence, not only manpower is saved, but also very easy, efficient.

Description

A kind of physical evidence exploration instrument

Technical field

The utility model relates to physical evidence exploration technical fields, and in particular to a kind of physical evidence exploration instrument.

Background technique

Excitation photoluminescence appearance method is using laser, ultraviolet light, various coloured light as light source, and irradiation excites biological trace In certain intrinsic fluorescent materials or fluorescent staining substance (certain intrinsic fluorescent materials or impression of the hand fluorescent staining object in such as impression of the hand Matter), so that it is issued fluorescence and shows a kind of method of biological trace.

Common excitation photoluminescence appearance method is divided into laser appearance method, ultraviolet light appearance method and alternative light source and shows Method, wherein laser appearance method has the characteristics that high brightness and monochromaticjty are good using laser as light source；Ultraviolet light appearance method is with purple Outer light is as light source, and alternative light source appearance method is using alternative light source.

Early in 1970s, scientist finds that laser is the best light source for investigating micro criminal material evidence on the spot；It is a large amount of real Proof is trampled, laser can easily find out various tracers of a crime, especially various traces of the discovery containing Human Physiology substance；Swash Light is with pure spectral characteristic, so that various biology traces are high-visible under laser irradiation.

Physical evidence exploration instrument is the important equipment that the departments such as public security organs, procuratorial organs, people's courts and judicial organs carry out site inspection, find material evidence trace, and material evidence is surveyed Looking into instrument is to induce trace evidence to shine using laser or ultraviolet light or various coloured light as excitation light source, existing especially suitable for public security Various material evidence searches and fingerprint show: smooth shell surface directly displays fingerprint and footprint；Non-smooth surface surface of shell, such as The discovery of grease fingerprint and sweat fingerprint on wall or paper；Biological material, such as bloodstain, the search of seminal stain, sweat, saliva； The trace evidence that capture is drifted or phosphate treated is crossed.

In the prior art, common physical evidence exploration instrument is merely provided for excitation light source, and induction trace evidence, which shines, to be shown；So And during actually reconnoitring scene, it usually also needs using evidence taking equipment, such as video camera or camera, to trace evidence It collects evidence；Physical evidence exploration instrument is two equipment separated with evidence taking equipment, and at least needing two staff to cooperate with could be complete At evidence obtaining work.

Utility model content

The purpose of this utility model is that improving the deficiency in the presence of the prior art, a kind of physical evidence exploration instrument is provided, is had There is the features such as compact-sized, small in size, light-weight；Center and the image capture module effective viewing field of irradiation light spot can not only be made Center be overlapped so that fluorescence signal acquisition is more efficient, material evidence feature is apparent, and only needs a people that can be completed at the same time Reconnoitre and the evidence obtaining work of material evidence, not only save manpower, but also very easy, efficient.

The technical scheme adopted by the utility model to solve the technical problem is as follows:

A kind of physical evidence exploration instrument, including light source module, image capture module and shell, the light source module and the figure As acquisition module is arranged in the shell, the light source module is used for generating excitation light source, described image acquisition module The image or image information of lower trace evidence are irradiated in acquisition excitation light source.

Light source module and image capture module are arranged in inside same housing simultaneously, generate excitation light source in light source module and shine It penetrates when survey area, to survey area simultaneously also in the effective viewing field of image capture module, in survey area When trace evidence issues fluorescence and show because of the irradiation of excitation light source, it can use image capture module and trace evidence carried out It observes, take pictures or images, so that reconnoitring for convenient, succinct completion material evidence only needs a people can with evidence obtaining work, whole process To complete, manpower is not only saved, but also very easy, efficient.

Preferably, the excitation light source generated in the light source module is laser or ultraviolet light or multiband light.

Preferably, the side of the shell is provided with notch, diaphragm is provided in the notch, the diaphragm is simultaneously In optical path in the light source module and described image acquisition module, light source module is projected excitation light source by diaphragm, Image capture module acquires the image or image information of trace evidence by diaphragm.Aperture optical path is total to by a diaphragm to set The injection for setting the injection and hull outside fluorescence of realizing enclosure interior excitation light source, is conducive to simplify this physical evidence exploration instrument Structure, the volume for being conducive to this physical evidence exploration instrument is smaller, weight is lighter, cost is lower.

Preferably, the light source module includes laser, collimator and lens, wherein the laser is for generating Laser, the collimator and the lens are successively set in the optical path of laser, and the collimator is used to carry out laser quasi- Directly, the laser beam after collimation is projected from the lens.

Preferably, the laser is using semiconductor laser.Semiconductor laser has spectrum line width, photoelectricity High conversion efficiency, it is low in energy consumption, small in size the features such as, further, combine object as light source using multiple semiconductor lasers Exploration instrument is demonstrate,proved, low-power consumption, light-weight and advantage small in size can have not only been kept but also obtained high-power and a variety of waves with can be convenient Long combined excitation light source.

Preferably, described image acquisition module includes camera lens, imaging sensor, image processor and memory, wherein Described image sensor is vertical with the main shaft of the camera lens, and light is penetrated on the image sensor by camera lens, described image sensor It is connected with the image processor, imaging sensor is used to collected light being converted to electric signal, and is transferred at image Device is managed, image processor is for handling the electric signal and storing in the memory.

Preferably, described image sensor is using CCD or CMOS.

Preferably, described image acquisition module is camera or video camera, the camera lens and window of the camera or video camera Mouth piece is coaxial.

In a kind of scheme, described image acquisition module further includes display screen, and the shell is arranged in the display screen Side, the diaphragm is coaxial with the camera lens, and dichroic beamsplitter is provided between the diaphragm and the camera lens, described Dichroic beamsplitter is in the optical path of the light source module, and dichroic beamsplitter is used to project from the light source module Light is reflected into diaphragm, and the display screen is connected with the image processor and the memory respectively；Display screen is for monitoring Real-time pictures to survey area.User directly can monitor the real-time pictures to survey area by display screen, thus just In the control picture to be taken pictures or be imaged, so that trace evidence and alignment lens, while user can also pass through display screen Check acquired image or image information in memory.In this physical evidence exploration instrument be arranged dichroic beamsplitter after, two to Between color spectroscope and diaphragm, the optical path of excitation light source is to be overlapped with the optical path of fluorescence in image capture module in light source module , i.e. optical path altogether；The structure setting of optical path altogether simplifies the structure of this physical evidence exploration instrument more, can also make light source The excitation light source that module generates, the trace evidence for wanting to obtain with image capture module is in same direction, so that exciting light The center of irradiation hot spot caused by source is overlapped with the center of image capture module effective viewing field just, what excitation light source was irradiated Region not only can all be acquired by image capture module, also help acquired image or image is apparent.

Preferably, incidence angle of the light projected in the light source module on the dichroic beamsplitter is 45 degree.According to The characteristics of dichroic beamsplitter, reflection light will be reflected in 90 degree of angle, and what is reflected from dichroic beamsplitter swashs Light emitting source just can be vertical directive diaphragm；Detailed process are as follows: excitation light source is projected from light source module, is divided through dichroic Directive diaphragm after mirror reflection, from direct irradiation after diaphragm injection to survey area；To survey area trace evidence because Illuminated and issue fluorescence, fluorescence is injected image through dichroic beamsplitter and is adopted by diaphragm directive dichroic beamsplitter In the camera lens for collecting module, finally recorded by image capture module；During this, part optical path is to be overlapped, the light splitting of two colors Mirror can be good at completely cutting off excitation light source, so as to be effectively prevented from interference of the excitation light source to fluorescence imaging, guarantee image The clarity of acquisition module institute's acquired image or image.

In more perfect scheme, described image acquisition module further includes data-interface, and the data-interface is arranged in institute It states on shell, data-interface is connected with the memory, and the data-interface is for the data in transfer register.Data-interface It can be common USB interface (Universal Serial Bus) or HDMI interface (High Definition Multimedia Interface) or AVG interface (Video Graphics Array) or DVI interface (Digital Visual Wi-Fi hotspot and mobile phone or computer wireless transmission picture or image can also be used in the physical interfaces such as Interface).

In another scheme, described image acquisition module further includes display screen, and the display screen is arranged in the shell Side, the other side of the shell is provided with light-emitting window and finds a view mouth, and the light of the light source module is arranged in the light-emitting window On the road, it is projected convenient for the excitation light source that light source module generates；The mouth of finding a view is arranged in the optical path of described image acquisition module, It is injected in image capture module convenient for the fluorescence that trace evidence is excited by mouth of finding a view；The display screen is for monitoring wait reconnoitre The real-time pictures in region.Light source module and image capture module in this programme are integrated in same housing simultaneously, but light source die Block and image capture module respectively have independent optical path, and light source module generates excitation light source and is radiated at when survey area, to Survey area simultaneously also in the effective viewing field of image capture module, also can conveniently, succinct completion material evidence reconnoitring and collecting evidence Work,

Compared with prior art, it using a kind of physical evidence exploration instrument provided by the utility model, has the advantages that

1, this physical evidence exploration instrument is compact-sized, volume is smaller, weight is lighter, cost is lower；Especially when in light source module Laser when using semiconductor laser, this physical evidence exploration instrument also has the characteristics that power is high, low in energy consumption.

2, light source module and image capture module are integrated in this physical evidence exploration instrument simultaneously, light source module generates excitation light source It is radiated at when survey area, to survey area simultaneously also in the effective viewing field of image capture module, in survey area Trace evidence when issuing fluorescence because of the irradiation of excitation light source and show, image capture module can see trace evidence It examines, take pictures or images, so that reconnoitring for convenient, succinct completion material evidence only needs a people with evidence obtaining work, whole process It completes, not only saves manpower, but also very easy, efficient.

3, this physical evidence exploration instrument not only makes the structure of this physical evidence exploration instrument simpler using the structure design of optical path altogether Change, it is also possible that the center of excitation light source irradiation hot spot is overlapped with the center of image capture module effective viewing field, so that Fluorescence signal acquisition is more efficient, and material evidence feature is apparent.

Detailed description of the invention

It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also To obtain other relevant attached drawings according to these attached drawings.

Fig. 1 is a kind of front-view schematic diagram of the physical evidence exploration instrument provided in the utility model embodiment 1.

Fig. 2 is a kind of schematic rear view of the physical evidence exploration instrument provided in the utility model embodiment 1.

Fig. 3 is the light path schematic diagram inside a kind of physical evidence exploration instrument provided in the utility model embodiment 1.

Fig. 4 is the light path schematic diagram inside a kind of physical evidence exploration instrument provided in the utility model embodiment 2.

Fig. 5 is the light path schematic diagram inside a kind of physical evidence exploration instrument provided in the utility model embodiment 3.

Description of symbols in figure

Shell 101, light source module 102, image capture module 103, to survey area 104, diaphragm 105, dichroic point Light microscopic 106, data-interface 107, the optical path 108 of excitation light source, the optical path 109 of fluorescence, camera or video camera 110；

Notch 101-1, light-emitting window 101-2, find a view a mouthful 101-3；

Laser 102-1, collimator 102-2, lens 102-3；

Camera lens 103-1, imaging sensor 103-2, image processor 103-3, memory 103-4, display screen 103-5.

Specific embodiment

Below in conjunction with attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear Chu is fully described by, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole realities Apply example.The component of the utility model embodiment being usually described and illustrated herein in the accompanying drawings can be come with a variety of different configurations Arrangement and design.Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit below The range of claimed invention, but it is merely representative of the selected embodiment of the utility model.Based on the utility model Embodiment, those skilled in the art's every other embodiment obtained without making creative work, all Belong to the range of the utility model protection.

Embodiment 1

Fig. 1 and Fig. 2 is please referred to, a kind of physical evidence exploration instrument is provided in the present embodiment, including light source module 102, image are adopted Collect module 103 and shell 101, light source module 102 and image capture module 103 are arranged at the inside of shell 101, light source die Excitation light source is radiated to survey area 104, for generating excitation light source to the trace evidence in survey area 104 by block 102 It can be because being excited to show due to issuing fluorescence；Image capture module 103 is used to acquire the image of the trace evidence under excitation light source irradiation Or image information, i.e. image capture module 103 can be taken pictures or be imaged to the trace for issuing fluorescence in trace evidence, thus Record material evidence.

Light source module 102 and image capture module 103 are arranged in simultaneously inside same housing 101, produce in light source module 102 Raw excitation light source is radiated at when survey area 104, to survey area 104 simultaneously also in effective view of image capture module 103 In, when the trace evidence in survey area 104 issues fluorescence and show because of the irradiation of excitation light source, figure can use As acquisition module 103 is observed trace evidence, taken pictures or imaged, so that convenient, succinct completion material evidence being reconnoitred and taking Work is demonstrate,proved, whole process only needs a people that can complete, and not only saves manpower, but also very easy, efficient.

In the present embodiment, the side of shell 101 is provided with notch 101-1, and diaphragm 105 is provided in notch 101-1, In optical path of the diaphragm 105 simultaneously in light source module 102 and image capture module 103, light source module 102 passes through diaphragm 105 project excitation light source, and image capture module 103 acquires image or image information by diaphragm 105.Pass through a window Piece 105 is total to the setting of aperture optical path and realizes the injection of 101 internal excitation light source of shell and the injection of epifluorescence, is conducive to simplify this The structure of physical evidence exploration instrument, the volume for being conducive to this physical evidence exploration instrument is smaller, weight is lighter, cost is lower.

In the present embodiment, diaphragm 105 is generally circular, and notch 101-1 is adapted to diaphragm 105, therefore notch 101-1 For circular port.

In the present embodiment, the excitation light source generated in light source module 102 is laser, since laser has high brightness, list The feature that color waits well, is increasingly becoming the best light source for investigating material evidence on the spot；Light source module 102 is appreciated that by the introduction in background When the excitation light source of generation is ultraviolet light or multiband light, it may have the characteristics of making trace evidence sending fluorescence and show, therefore use Ultraviolet light or multiband light substitution laser are also feasible.

In the present embodiment, in the inside of shell 101, light source module 102 include laser 102-1, collimator 102-2 with And lens 102-3, as shown in Figure 3；Wherein, laser 102-1 is for generating laser light source, collimator 102-2 and lens 102-3 is successively set in the optical path of laser light source, and collimator 102-2 is for collimating laser, the laser beam after collimation It is projected from lens 102-3.

In further scheme, laser 102-1 is using semiconductor laser 102-1, semiconductor laser 102-1 has the characteristics that spectrum line width, photoelectric conversion efficiency are high, low in energy consumption, small in size, further, is partly led using multiple Body laser 102-1 combines physical evidence exploration instrument as light source, can not only keep low-power consumption, light-weight and advantage small in size but also Obtain the excitation light source of high-power and multi-wavelength combination with can be convenient.

In the present embodiment, in the inside of shell 101, image capture module 103 includes camera lens 103-1, imaging sensor 103-2, image processor 103-3 and memory 103-4, wherein the main shaft of imaging sensor 103-2 and camera lens 103-1 hangs down Directly, i.e. camera lens 103-1 and imaging sensor 103-2 are in same optical path, and the light of camera lens 103-1 is injected outside shell 101, It can be radiated on imaging sensor 103-2 after through lens 102-3, imaging sensor 103-2 and image processor 103-3 It is connected, collected light is converted to electric signal by imaging sensor 103-2, and is transferred to image processor 103-3, at image Reason device 103-3 is used to handle the signal of imaging sensor 103-2 acquisition and is stored in memory 103-4, i.e. image processor 103-3 can be calculated and be handled to the electric signal transmitted from imaging sensor 103-2, and being allowed to be converted to human eye can be direct The image data of observation, and be stored in memory 103-4.

In the present embodiment, imaging sensor 103-2 is using CCD (Charge-coupled Device, charge coupling Close element) or CMOS (Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductor), CCD or CMOS is common semiconductor devices, optical image can be converted into electric signal.

In a kind of scheme, image capture module 103 further includes display screen 103-5, and display screen 103-5 is arranged in shell 101 side, diaphragm 105 is coaxial with camera lens 103-1, is provided with dichroic beamsplitter between diaphragm 105 and camera lens 103-1 106, dichroic beamsplitter 106 is in the optical path of light source module 102, the light beam projected from light source module 102 be mapped to two to When on color spectroscope 106, diaphragm 105 can be reflected by dichroic beamsplitter 106, and project from diaphragm 105, direct irradiation To survey area 104, so that showing to the trace evidence in survey area 104 because issuing fluorescence；Display screen 103-5 It is connected respectively with image processor 103-3 and memory 103-4, user can directly be monitored by display screen 103-5 wait survey The real-time pictures in region 104 are looked into, consequently facilitating the control picture to be taken pictures or be imaged, so that trace evidence and camera lens 103-1 Alignment, while user can also check acquired image or image information in memory 103-4 by display screen 103-5. After dichroic beamsplitter 106 is set in this physical evidence exploration instrument, between dichroic beamsplitter 106 and diaphragm 105, light source die The optical path 108 of excitation light source is overlapped with the optical path 109 of fluorescence in image capture module 103 in block 102, i.e. optical path altogether；Altogether The structure setting of optical path simplifies the structure of this physical evidence exploration instrument more, light source module 102 can also be made to generate sharp Light emitting source, the trace evidence for wanting to obtain with image capture module 103 is in same direction, so that caused by excitation light source The center of irradiation hot spot is overlapped with the center of 103 effective viewing field of image capture module just, and the region that excitation light source is irradiated is not It only can all be acquired by image capture module 103, so that fluorescence signal acquisition is more efficient, also help the image of acquisition Or image is apparent.

Angle of the dichroic beamsplitter 106 in 102 optical path of light source module is can be preset, according to dichroic point The characteristics of light microscopic 106, preferably scheme in the present embodiment are as follows: the light projected from light source module 102 is in dichroic beamsplitter 106 On incidence angle be 45 degree, at this point, reflection light will be reflected in 90 degree of angle, directive diaphragm that just can be vertical 105；The fluorescence that trace evidence is issued because illuminated is recorded by image capture module 103, while dichroic beam splitter can be very Good isolation excitation light source guarantees image capture module so as to be effectively prevented from interference of the excitation light source to fluorescence imaging The clarity of 103 acquired images or image.

In more perfect scheme, image capture module 103 further includes data-interface 107, and data-interface 107 is arranged in shell On body 101, data-interface 107 is connected with memory 103-4, and user is available will be in memory 103-4 by data-interface 107 The data of storage be transferred in external equipment (such as USB flash disk, mobile hard disk etc.), data-interface 107 can be common USB interface (Universal Serial Bus) or HDMI interface (High Definition Multimedia Interface) or AVG connect The mouth physical interfaces such as (Video Graphics Array) or DVI interface (Digital Visual Interface), can also benefit With Wi-Fi hotspot and mobile phone or computer wireless transmission picture or image.

Embodiment 2

The present embodiment 2 and the main distinction of above-described embodiment 1 be, in the present embodiment, image capture module 103 can be with Using camera commonly used in the prior art or video camera 110, the camera lens 103-1 and diaphragm 105 of camera or video camera 110 It is coaxial.

As shown in figure 4, the laser beam that light source module 102 generates, by penetrating after lens 102-3 in dichroic beamsplitter 106 On, and be reflected into diaphragm 105 by dichroic beamsplitter 106, it is radiated at finally by diaphragm 105 to survey area 104； Fluorescence can be issued because of the irradiation of laser to the trace evidence in survey area 104, and be revealed out, what trace evidence issued Fluorescence is penetrated on dichroic beamsplitter 106 by diaphragm 105, and by dichroic beamsplitter 106, passes through dichroic beamsplitter 106 fluorescence light path does not change, and is finally emitted directly toward in the camera lens 103-1 of camera or video camera 110；User can lead to It crosses camera or video camera 110 and image or image collection is carried out to trace evidence；This physical evidence exploration instrument is completed at the same time Excitation light source irradiation and photograph evidence obtaining work, and only need a people that can complete reconnoitring and acquiring for material evidence, manpower is not only saved, but also It is very easy, efficient.

Embodiment 3

As shown in figure 5, providing a kind of physical evidence exploration instrument in the present embodiment, including light source module 102, image capture module 103 and shell 101, light source module 102 and image capture module 103 are arranged at the inside of shell 101, light source module 102 For generating excitation light source, excitation light source is radiated to survey area 104, it can be because to the trace evidence in survey area 104 It issues fluorescence and shows；Image capture module 103 is used to acquire the image or image letter of the trace evidence under excitation light source irradiation Breath, i.e. image capture module 103 can be taken pictures or be imaged to the trace for issuing fluorescence in trace evidence, to record object Card.

Light source module 102 includes semiconductor laser 102-1, collimator 102-2 and lens 102-3, wherein laser For generating laser light source, collimator 102-2 and lens 102-3 are successively set in the optical path of laser light source 102-1, collimation For collimating to laser, the laser beam after collimation projects device 102-2 from lens 102-3.

Image capture module 103 includes camera lens 103-1, imaging sensor 103-2, image processor 103-3 and storage Device 103-4, wherein imaging sensor 103-2 is vertical with the main shaft of camera lens 103-1, i.e. camera lens 103-1 and imaging sensor 103- 2 in same optical path, and the light of camera lens 103-1 is injected outside shell 101, can be radiated at figure after through lens 102-3 As on sensor 103-2, imaging sensor 103-2 is connected with image processor 103-3, and imaging sensor 103-2 will be collected Light be converted to electric signal, and be transferred to image processor 103-3, image processor 103-3 is for handling imaging sensor The signal of 103-2 acquisition is simultaneously stored in memory 103-4, i.e. image processor 103-3 can be passed to from imaging sensor 103-2 The defeated electric signal to come is calculated and is handled, and is allowed to be converted to the image data that human eye can be observed directly, and be stored in storage In device 103-4.

In the present embodiment, image capture module 103 further includes display screen 103-5, and display screen 103-5 is arranged in shell 101 side, the other side of shell 101 is provided with light-emitting window 101-2 and mouthful 101-3 that finds a view, as shown in figure 5, light-emitting window 101-2 It is arranged in the optical path of light source module 102, the excitation light source that light source module 102 is generated projects, and is radiated at wait survey Look into region 104；Mouthful 101-3 that finds a view is arranged in the optical path of image capture module 103, so as to trace object in survey area 104 Image capture module 103 can be entered by mouthful 101-3 that finds a view by demonstrate,proving the fluorescence being excited, thus by 103 institute of image capture module Record；Display screen 103-5 is connected with image processor 103-3 and memory 103-4 respectively, and user can directly pass through display Shield 103-5 and monitors that the real-time pictures to survey area 104 adjust trace consequently facilitating controlling the picture to be taken pictures or be imaged Material evidence is aligned with camera lens 103-1, at the same user can also be checked by display screen 103-5 it is collected in memory 103-4 Image or image information.For embodiment 1, light source module 102 integrates the present embodiment simultaneously with image capture module 103 In same housing 101, but light source module 102 and image capture module 103 respectively have independent optical path, light source module 102 It generates excitation light source to be radiated at when survey area 104, to survey area 104 simultaneously also in the effective of image capture module 103 In visual field, it is same only need a staff can conveniently, succinct completions material evidence reconnoitres and work of collecting evidence.

Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to In this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation Or replacement, it should be covered within the scope of the utility model.

Claims (8)

1. a kind of physical evidence exploration instrument, which is characterized in that including light source module, image capture module and shell, the light source die Block and described image acquisition module are arranged in the shell, and the side of the shell is provided with notch, sets in the notch It is equipped with diaphragm, the diaphragm is in the optical path of the light source module and described image acquisition module simultaneously, the light source Module is projected excitation light source by diaphragm for generating excitation light source, and described image acquisition module is for passing through window Piece acquires the image or image information that excitation light source irradiates lower trace evidence.

2. physical evidence exploration instrument according to claim 1, which is characterized in that the excitation light source generated in the light source module is Laser or ultraviolet light or multiband light.

3. physical evidence exploration instrument according to claim 1, which is characterized in that the light source module includes laser, collimator And lens, wherein for the laser for generating laser, the collimator and the lens are successively set on the light of laser On the road, for collimating to laser, the laser beam after collimation projects the collimator from the lens.

4. physical evidence exploration instrument according to claim 3, which is characterized in that the laser is using semiconductor laser Device.

5. physical evidence exploration instrument according to claim 4, which is characterized in that described image acquisition module includes camera lens, image Sensor, image processor and memory, wherein described image sensor is vertical with the main shaft of the camera lens, and light passes through mirror Head is penetrated on the image sensor, and described image sensor is connected with the image processor, and imaging sensor will be for that will collect Light be converted to electric signal, and be transferred to image processor, image processor is for handling the electric signal and being stored in institute It states in memory.

6. physical evidence exploration instrument according to claim 4, which is characterized in that described image acquisition module is camera or camera shooting The camera lens of machine, the camera or video camera is coaxial with diaphragm.

7. physical evidence exploration instrument according to claim 5, which is characterized in that described image acquisition module further includes display screen, The side of the shell is arranged in the display screen, and the diaphragm is coaxial with the camera lens, the diaphragm and the camera lens Between be provided with dichroic beamsplitter, the dichroic beamsplitter is in the optical path of the light source module, dichroic beamsplitter For the light projected from the light source module to be reflected into diaphragm, the display screen respectively with the image processor and institute Memory is stated to be connected；Display screen is used to monitor the real-time pictures to survey area.

8. physical evidence exploration instrument according to claim 7, which is characterized in that the light projected in the light source module is described two Incidence angle on color spectroscope is 45 degree.