阅读说明：本技术 一种刑侦指印拍摄时去除复杂背景干扰装置 (Device for removing complex background interference during criminal investigation fingerprint shooting ) 是由 张有干 朱红 于 2019-11-04 设计创作，主要内容包括：本发明公开了一种刑侦指印拍摄时去除复杂背景干扰装置,包括暗盒,暗盒顶部和底部分别设置有相对的镜头连接口和拍摄选区口,暗盒内位于镜头连接口正下部位置设置有倾斜的定向反射镜,定向反射镜下表面相对的暗盒侧面位置设置有入射光源,定向反射镜将入射光源入射的光束垂直反射至拍摄选区口,反射光实现对拍摄选区口内的背景和指印进行照射；本发明的刑侦指印拍摄时去除复杂背景干扰装置,根据光学原理和光学反射原理,向指印位置人为加入照射光,并改变照射光的强弱、光束直径和光束位置,改变物体表面反射的光线与指印反射的光线不一致,便于将指印拍摄清楚。(The invention discloses a device for removing complex background interference during criminal investigation fingerprint shooting, which comprises a cassette, wherein the top and the bottom of the cassette are respectively provided with a lens connecting port and a shooting area selecting port which are opposite, an inclined directional reflector is arranged in the cassette at the position right below the lens connecting port, an incident light source is arranged at the position of the side surface of the cassette opposite to the lower surface of the directional reflector, the directional reflector vertically reflects light beams incident from the incident light source to the shooting area selecting port, and the reflected light realizes irradiation of the background and fingerprints in the shooting area selecting port; according to the criminal investigation fingerprint shooting device, the irradiation light is artificially added to the fingerprint position according to the optical principle and the optical reflection principle, the intensity of the irradiation light, the beam diameter and the beam position are changed, the inconsistency between the light reflected by the surface of an object and the light reflected by the fingerprint is changed, and the fingerprint shooting is convenient to be clear.)

1. The device for removing the complex background interference during criminal investigation fingerprint shooting is characterized by comprising a cassette, wherein the top and the bottom of the cassette are respectively provided with a lens connecting port and a shooting area selecting port which are opposite to each other, an inclined directional reflector is arranged in the cassette and is positioned right below the lens connecting port, an incident light source is arranged at the side position of the cassette opposite to the lower surface of the directional reflector, the directional reflector vertically reflects light beams incident from the incident light source to the shooting area selecting port, and the reflected light irradiates the background and fingerprints in the shooting area selecting port.

2. The device for removing the complicated background interference during criminal investigation fingerprint shooting according to claim 1, wherein a cylindrical inner box body with two open ends is arranged in the cassette, one end of the cylindrical inner box body is open and is a shooting selection area, the other end of the cylindrical inner box body is open and is connected with a lens connecting port, the area of the lens connecting port is smaller than the area of the cross section of the cylindrical inner box body, the directional reflector is fixed inside the cylindrical inner box body, and the projection area of the directional reflector is matched with the area of the shooting selection area.

3. The criminal investigation fingerprint capturing device of claim 2, wherein the directional mirror tilt angle is 45 degrees.

4. The criminal investigation fingerprint shooting device for removing the complicated background interference according to claim 2, wherein the side of the cylindrical inner box body close to the incident light source is provided with an incident light port facing the incident light source, the incident light port is arranged on the side of the cylindrical inner box body at the lower part of the lower surface of the directional reflector, the incident light port is provided with a side lens, and the projection of the side lens on the lower surface of the directional reflector is smaller than the area of the lower surface of the directional reflector.

5. The device for removing the interference of the complicated background during the criminal investigation fingerprint shooting according to claim 1, wherein the incident light source comprises a light source mounting plate and a lamp bead, the lamp bead is electrically connected with a light beam intensity adjusting mechanism, the front part of the lamp bead is provided with a light beam diameter adjusting mechanism, the light source mounting plate is connected with a light speed position adjusting mechanism, and the light beam intensity adjusting mechanism, the light beam diameter adjusting mechanism and the light speed position adjusting mechanism respectively adjust the light beam intensity, the light beam diameter and the light speed position irradiated to the shooting area through the directional reflector.

6. The device for removing the interference from the complex background during the criminal investigation fingerprint shooting of claim 5, wherein the light beam intensity adjusting mechanism comprises an adjusting circuit electrically connected to the lamp bead, and the adjusting circuit changes the intensity of the light emitted from the incident light source by changing the current passing through the lamp bead.

7. The device for removing the complex background interference during criminal investigation fingerprint shooting according to claim 5, wherein the light beam diameter adjusting mechanism is fixed on the light source mounting plate and comprises an aperture arranged on the side of the lamp bead close to the directional reflector and an aperture adjusting assembly connected with the aperture, the aperture mainly comprises a mounting ring, a pressing ring and a diaphragm arranged between the mounting ring and the pressing ring, the aperture adjusting assembly is connected with the pressing ring, and the aperture adjusting assembly comprises a turbine fixedly connected with the pressing ring, a worm meshed with the turbine, and a first motor connected to one end of the worm and driving the worm to rotate.

8. The device for removing the complicated background interference during criminal investigation fingerprint shooting according to claim 5, wherein the light speed position adjusting mechanism comprises a sliding plate connected with the light source mounting plate, a second motor is fixed on the sliding plate, a lifting screw rod parallel to the connection line of the lens connecting port and the shooting selection port is connected to the output shaft of the second motor, the lifting screw rod passes through a fixing plate fixed on the bottom surface of the cassette, and the second motor drives the sliding plate and the light source mounting plate to slide in parallel to the axial direction of the screw rod through the lifting screw rod.

9. The device for removing the interference of the complicated background during the criminal investigation fingerprint shooting according to claim 5, wherein the hidden box is provided with an electrical contact, and the electrical contact is electrically connected with the lamp bead, the light beam intensity adjusting mechanism, the light beam diameter adjusting mechanism and the light speed position adjusting mechanism.

Technical Field

The invention belongs to the field of criminal investigation fingerprint extraction, and particularly relates to a device for removing complex background interference during criminal investigation fingerprint shooting.

Background

The fingerprint is because a person has grease, sweat and even dust on a finger, and certain grease, sweat and even dust marks are left on the surface of an object after the person touches the surface of the object. In criminal investigation fingerprint extraction, for the appearance of fingerprints, the traditional appearance methods include a powder appearance method, a chemical appearance method and the like. Neither powder nor chemical agents are destructive to the printed matter. For example, a powder brush is used for displaying the fingerprint, a brush and other brush tools have certain destructive effects on the detail characteristics of fingerprint lines in the process of displaying, the originality of the fingerprint is influenced, and certain influence is caused on fingerprint identification work; the fingerprint is displayed by using a chemical reagent, and the reagent can wash fingerprint lines to a certain extent in the operation process no matter a liquid dragging method or a spraying display method, so that the definition of the lines and the detail characteristics of the lines can be influenced, and the identification is not facilitated.

In order to solve the above technical problems, research has been conducted to find that the optical visualization method is a non-destructive visualization method. Because the fingerprint on the smooth object is displayed by using the optical display method, the detailed characteristics of fingerprint lines are not damaged, and the residual substance components in the fingerprint are not influenced, so that the method is an effective nondestructive testing method and can be widely used in criminal investigation.

However, in practical use, it is found that many fingerprints are printed on the surface of an object with relatively deep or complicated colors or patterns, so that the interference of the background to the fingerprints in fingerprint shooting is large, and the fingerprint shooting is difficult to be clear. This is because the photographing of fingerprints on the surface of an object records mainly the reflected light of a substance, and the cause of the occurrence of background noise is closely related to the reflection characteristics of the substance.

Disclosure of Invention

The invention aims to provide a device for removing complex background interference during criminal investigation fingerprint shooting, which artificially adds irradiation light to a fingerprint position according to an optical principle and an optical reflection principle, changes the intensity of the irradiation light, the beam diameter and the beam position, and changes the inconsistency between the light reflected by the surface of an object and the light reflected by the fingerprint, thereby being convenient for clearly shooting the fingerprint; on the other hand, the intensity of incident light, the beam diameter and the beam position are automatically adjusted by one-key buttons in shooting, the adjusting operation is convenient and fast, and the adjusting difficulty and the shooting difficulty are reduced.

The invention discloses a device for removing complex background interference during criminal investigation fingerprint shooting, which comprises a cassette, wherein the top and the bottom of the cassette are respectively provided with a lens connecting port and a shooting area selecting port which are opposite, an inclined directional reflector is arranged in the cassette at the position right below the lens connecting port, an incident light source is arranged at the position of the side surface of the cassette opposite to the lower surface of the directional reflector, the directional reflector vertically reflects light beams incident from the incident light source to the shooting area selecting port, and the reflected light realizes irradiation of the background and fingerprints in the shooting area selecting port.

Preferably, a columnar inner box body with two open ends is arranged in the cassette, one end opening of the columnar inner box body is a shooting selection area opening, the other end opening is connected with a lens connecting port, the area of the lens connecting port is smaller than the area of the cross section of the columnar inner box body, the directional reflector is fixed inside the columnar inner box body, and the projection area of the directional reflector is matched with the area of the shooting selection area opening.

Preferably, the directional mirror is tilted at 45 degrees.

Preferably, an incident light port facing the incident light source is arranged on the side surface of the columnar inner box body close to the incident light source, the incident light port is arranged on the side surface of the columnar inner box body at the lower part of the lower surface of the directional reflector, a side lens is arranged on the incident light port, and the projection of the side lens on the lower surface of the directional reflector is smaller than the area of the lower surface of the directional reflector.

Preferably, incident light source includes light source mounting panel and lamp pearl, electric connection has beam intensity adjustment mechanism on the lamp pearl, the lamp pearl front portion is provided with beam diameter adjustment mechanism, be connected with the fast position control mechanism of light on the light source mounting panel, beam intensity adjustment mechanism, beam diameter adjustment mechanism and the fast position control mechanism of light adjust respectively through directional reflector shine to the light beam intensity, beam diameter and the fast position of light in shooting district.

Preferably, the light beam intensity adjusting mechanism comprises an adjusting circuit electrically connected with the lamp beads, and the adjusting circuit changes the intensity of illumination emitted by the incident light source by changing the current passing through the lamp beads.

Preferably, the beam diameter adjusting mechanism is fixed on the light source mounting plate and comprises an aperture arranged on the side of the lamp bead close to the directional reflector and an aperture adjusting assembly connected with the aperture, the aperture mainly comprises a mounting ring, a pressing ring and a diaphragm arranged between the mounting ring and the pressing ring, the aperture adjusting assembly is connected with the pressing ring, and the aperture adjusting assembly comprises a turbine fixedly connected with the pressing ring, a worm meshed with the turbine and a first motor connected to one end of the worm and driving the worm to rotate.

Preferably, the light speed position adjusting mechanism comprises a sliding plate connected with the light source mounting plate, a second motor is fixed on the sliding plate, a lifting screw parallel to the connection line of the lens connector and the shooting selection area port is connected to an output shaft of the second motor, the lifting screw penetrates through a fixing plate fixed to the bottom surface of the cassette, and the second motor drives the sliding plate and the light source mounting plate to slide in the direction parallel to the axis of the screw through the lifting screw.

Preferably, the cassette is provided with an electrical contact, and the electrical contact is electrically connected with the lamp bead, the light beam intensity adjusting mechanism, the light beam diameter adjusting mechanism and the light speed position adjusting mechanism.

The device for removing the complex background interference during criminal investigation fingerprint shooting of the technical scheme needs to be matched with a mobile phone, a camera and other forming systems to use when in use, and a general multipurpose special imaging system equipped with a specialty is used to form an integral criminal investigation fingerprint shooting device. The imaging system is provided with a power supply, an electric terminal electrically connected with the electric contact, and a key for controlling the light beam intensity adjusting mechanism, the light beam diameter adjusting mechanism and the light speed position adjusting mechanism. When the shooting device is used, the imaging system is directly placed on the cassette of the device for removing the complex background interference in the technical scheme and is fixed through a related structure. For example, the connection terminals respectively disposed on the imaging system and the cassette are connected by clamping between the limiting grooves and the connecting strips respectively disposed on the imaging system and the cassette, and any structure or manner capable of fixing the imaging system and the cassette in the prior art can be adopted.

The device for removing the complex background interference during criminal investigation fingerprint shooting in the technical scheme of the invention is based on the following principle:

the difference in the intensity and the color tone distribution of the internally reflected light at each part of the object being photographed constitutes background noise. In most cases, the background pattern of these photographed objects appears to interfere with the fingerprint's streaking. In addition, some irregular shapes of the object surface also cause changes in the reflected light from the surface of each part, which constitutes background shape interference. In fingerprint extraction shooting, the weaker the background pattern interference is, the clearer the fingerprint line characteristic display is, so that the background interference is eliminated or reduced or completely eliminated in the fingerprint shooting process.

When recording or observing a fingerprint material by photography, if the brightness of the reflected light of the thread material or the reflected light of the object surface is much greater than that of the internally reflected light, the relative effect of the internally reflected light is small and the interference pattern becomes weak. When the difference between them exceeds the film's latitude, there will be no exposure of the internally reflected light on properly exposed film and the background pattern interference is completely eliminated. Therefore, the difference between the reflected light of the object surface or the reflected light of the thread material and the reflected light in the object can be effectively increased by using a proper light distribution technology and a proper light source in fingerprint photography, and the interference of a background pattern is reduced or completely eliminated.

In the technical scheme of the invention, the directional reflection photography technology of the directional reflector is mainly applied. The directional reflection photography technique refers to recording the reflected light luminance distribution of a subject in a directional reflection direction. The illuminating light is incident on the surface of the object to be shot at a certain angle, and the camera lens takes a picture and records in the direction of the corresponding reflection angle. If the surface of the object has a directional reflection property, the reflection light spot of the surface of the object can be photographed. In the directional reflection light distribution, reflected light from a non-directional reflecting substance (a substance that undergoes diffuse reflection or mixed reflection) appears in a wide range, reflected light in the direction of the reflection angle (i.e., the camera shooting direction) is only a small part of the reflected light, and reflected light from a directional reflecting substance is concentrated in one direction. Therefore, in the light distribution of directional reflection, the reflection brightness on the surface of the object is far greater than that of the non-directional reflection substance, namely, a great brightness contrast exists between the two substances, so that the fingerprint trace of the bright background dark stripe can be obtained in the camera. The directional reflection photography is mainly suitable for the traces of diffuse reflection or mixed reflection on the smooth object surface. Because sweat, grease and dust belong to non-directional reflecting substances, mixed reflection or diffuse reflection occurs under the irradiation of light, and a brightness difference can be generated between the sweat, the grease and the dust and the directional reflection on the surface of the smooth object, so that the trace on the smooth object can show the brightness difference of bright background and dark hue traces by using a directional reflection photographing technology.

In the technical scheme of the invention, because the directional reflector is obliquely arranged at 45 degrees, the vertical directional reflection photography technology of the directional reflector is mainly applied. The vertical-oriented reflection photography technique is one of the oriented reflection techniques, and is therefore suitable for use with non-smooth marks on smooth object surfaces. Because the incident light source is under the action of the directional reflector obliquely arranged at 45 degrees, the vertical incidence points to the photographed area, the reflected light of the photographed area returns along the original path of the incident light direction (namely returns vertical to the photographed area), namely vertical directional reflection occurs, because the handprints are not smooth, the dust handprints are subjected to diffuse reflection, the sweat latent handprints and the grease handprints are subjected to mixed reflection, and a certain brightness difference is generated between the reflected light and the vertical directional reflected light on the surface of a smooth object. And (3) photographing by using a camera in the direction of the vertical reflected light, and observing a bright object background and fingerprint lines with slightly dark brightness, so that non-smooth fingerprint traces on the smooth object are displayed by using a vertical directional reflection photographing technology, and a fingerprint picture with bright background and dark lines is obtained.

Film latitude refers to: the range of scene brightness contrast that the film can properly accommodate. A film that can correctly record a scene with a large contrast in brightness is called a film with a large latitude, and vice versa is called a film with a small latitude. Generally, the width of the film should be as large as possible. The film with small latitude often makes the bright and dark parts of the scene not be reflected correctly on the image, and damages the reality of the image. Further, exposure latitude, development latitude, and the like in use are all permissible ranges in use.

The device for removing the complex background interference during criminal investigation fingerprint shooting has the beneficial effects that:

1. by artificially increasing and controlling the incident light source, the incident light source can effectively increase the difference between the reflected light of the surface of the object or the reflected light of the line material and the reflected light in the object, reduce or completely eliminate the interference of background patterns, and facilitate the clear shooting of fingerprint lines under a complex background.

2. By utilizing the directional reflection photography technology, because the fingerprint is not smooth, the dust fingerprint is subjected to diffuse reflection, the sweat latent fingerprint and the grease fingerprint are subjected to mixed reflection, a certain brightness difference is generated between the sweat latent fingerprint and the grease fingerprint and the vertical directional reflection light on the surface of a smooth object, and the fingerprint lines under the complex background are clearly shot by utilizing the directional reflection photography technology.

3. The automatic control of the light beam is realized by utilizing the arranged electric automatic control device (the light beam intensity adjusting mechanism, the light beam diameter adjusting mechanism and the light speed position adjusting mechanism) of the incident light beam, the automatic adjustment of a button is realized, the adjusting operation is convenient and fast, and the adjusting difficulty and the shooting difficulty are reduced.

Drawings

FIG. 1 is a schematic view of the overall structure of a device for removing the interference of a complex background during criminal investigation fingerprint shooting according to the technical scheme of the invention,

FIG. 2 is a schematic view of the internal structure of a device for removing the interference of a complex background during criminal investigation fingerprint shooting according to the technical scheme of the invention,

FIG. 3 is a front view of the internal structure of a device for eliminating the interference of a complex background during criminal investigation fingerprint shooting according to the technical scheme of the invention,

FIG. 4 is a bottom view of the whole device for eliminating the interference of the complex background in the criminal investigation fingerprint shooting according to the technical scheme of the invention,

fig. 5 is a schematic view of the aperture structure of the beam diameter adjusting mechanism.

Detailed Description

In order to facilitate the understanding of the technical solutions of the present invention for those skilled in the art, the technical solutions of the present invention will be further described with reference to the drawings attached to the specification.

As shown in fig. 1 to 4, the device for removing the complex background interference during criminal investigation fingerprint shooting according to the technical solution of the present invention comprises a cassette 1, wherein the cassette 1 is provided with a lens connection port 2 and a shooting selection port 12 at the top and the bottom thereof respectively. An inclined directional reflector 17 is arranged in the cassette 1 at the position right below the lens connecting port 2, and an incident light source 5 is arranged at the side position of the cassette 1 opposite to the lower surface of the directional reflector 14. The directional reflector 17 vertically reflects the light beam incident from the incident light source 5 to the shooting selection opening 12, and the reflected light realizes irradiation of the background and fingerprint in the shooting selection opening 12.

Based on the above technical scheme, except for the lens connector 2 and the shooting selection port 12, the other parts of the cassette 1 are sealed, so that external light is prevented from entering the fingerprint shooting area selected by the shooting selection port 12 of the cassette 1, and the interference of the external light on the fingerprint shooting area is avoided, so that the cassette 1 loses the control effect on the light or the control effect is weakened, and the fingerprint shooting is difficult.

Based on the technical scheme, the inner side surface of the cassette 1, particularly the inner side surface of the columnar inner box body, is coated into dark color or black color, so that incident light is prevented or reduced from being refracted out after being incident on the directional reflector 17 as much as possible, the incident light is ensured to be reflected to the fingerprint shooting area selected by the shooting selection area port 12 as much as possible, light spots are formed, and the fingerprint area is irradiated.

Based on the technical scheme, the working principle of the device for removing the complex background interference during criminal investigation fingerprint shooting is as follows: when recording or observing a fingerprint material by photography, if the brightness of the reflected light of the thread material or the reflected light of the object surface is much greater than that of the internally reflected light, the relative effect of the internally reflected light is small and the interference pattern becomes weak. When the difference between them exceeds the film's latitude, there will be no exposure of the internally reflected light on properly exposed film and the background pattern interference is completely eliminated. Therefore, the difference between the reflected light of the object surface or the reflected light of the thread material and the reflected light in the object can be effectively increased by using a proper light distribution technology and a proper light source in fingerprint photography, and the interference of removing the background pattern is reduced or completely eliminated.

As shown in fig. 4, a cylindrical inner box body 4 with two open ends is arranged in a cassette 1 according to the technical solution of the present invention, one end of the cylindrical inner box body 4 is open and is a shooting selection area opening 12, the other end of the cylindrical inner box body is open and is connected with a lens connector 2, and a shooting lens is fixed in the lens connector 2. The area of the lens connecting port 2 is smaller than the area of the cross section of the columnar inner box body 4, the directional reflector 17 is fixed inside the columnar inner box body 4, and the projection area of the directional reflector 17 is matched with the area of the shooting selection port 12. The directional mirror 17 is inclined at an angle of 45 degrees. The imaging system is connected with the lens connecting port 2 at the upper part, and the finger print in the shooting selection area port 12 at the bottom of the directional reflector 17 is shot by the lens connecting port 2.

As shown in fig. 4, an incident light port 16 facing the incident light source 5 is disposed on a side surface of the cylindrical inner case 4 close to the incident light source 5, the incident light port 16 is disposed on a side surface of the cylindrical inner case 4 at a lower portion of a lower surface of the directional reflector 17, a side lens is disposed on the incident light port 16, and a projection of the side lens on the lower surface of the directional reflector is smaller than an area of the lower surface of the directional reflector. The light emitted by the incident light source 5 is converged into parallel light by the side lens and is irradiated onto the directional reflector 17, the directional reflector 17 reflects the light to the fingerprint flat shooting area in the shooting selection opening 12 in parallel, light spots are formed in the shooting area, and the fingerprint and the background behind the fingerprint are irradiated.

As shown in fig. 2 and 3, the incident light source 5 according to the technical scheme of the present invention includes a light source mounting plate 15 and a lamp bead, wherein a light beam intensity adjusting mechanism is electrically connected to the lamp bead, a light beam diameter adjusting mechanism is arranged at the front of the lamp bead, a light speed position adjusting mechanism is connected to the light source mounting plate, and the light beam intensity adjusting mechanism, the light beam diameter adjusting mechanism and the light speed position adjusting mechanism respectively adjust the light beam intensity, the light beam diameter and the light speed position irradiated to the shooting area through the directional reflector.

Referring to fig. 2 and 3, the light beam intensity adjusting mechanism according to the technical scheme of the present invention includes an adjusting circuit electrically connected to the lamp beads, and the adjusting circuit changes the intensity of light emitted from the incident light source 5 by changing the current passing through the lamp beads.

As shown in fig. 2, fig. 3 and fig. 5, the light beam diameter adjusting mechanism of the technical solution of the present invention is fixed on the light source mounting plate 15 and includes an aperture arranged on the side of the lamp bead close to the directional reflector and an aperture adjusting assembly connected to the aperture, wherein the aperture mainly includes a mounting ring 51, a pressing ring 52 and a diaphragm 53 arranged between the mounting ring 51 and the pressing ring 52. The aperture adjusting assembly is connected with the pressing ring 51, and comprises a worm wheel 54 fixedly connected with the pressing ring 51, a worm 6 meshed with the worm wheel 54, and a first motor 61 connected to one end of the worm 6 and driving the worm 6 to rotate.

Based on the above technical solution, the first motor 61 drives the clamp ring 51 to rotate through the worm gear, and the diaphragm 53 fixed between the mount ring 51 and the clamp ring 52 is driven, as shown in fig. 5, the diaphragm sheet of the diaphragm 53 is closed or expanded along with the rotation of the clamp ring 51, so as to adjust the light transmission area of the diaphragm and adjust the diameter of the light beam passing through the diaphragm. The change of the light speed diameter irradiated on the directional reflector 17 can cause the change of the size of the light spot reflected into the shooting selection port 12 through the directional reflector 17, thereby realizing the change of the illumination area of the fingerprint background size.

As shown in fig. 2 and 3, the light speed position adjusting mechanism according to the present invention includes a sliding plate 7 connected to a light source mounting plate 15 through a connecting plate 14, a second motor 10 fixed to the sliding plate 7, a lifting screw 8 connected to an output shaft of the second motor 10 and parallel to a connection line between the lens connection port 2 and the shooting selection port 12, the lifting screw 8 passing through a fixing plate 9 fixed to a bottom surface of the cassette 1, and the second motor 10 driving the sliding plate 7 and the light source mounting plate 15 to slide in a direction parallel to an axis 8 of the screw through the lifting screw 8. The incident light source 5 is lifted under the action of the second motor 10 along with the light source mounting plate 15, the incident light source 5 is lifted to enable the position of the aperture irradiated into the shooting selection area opening 12 to move horizontally in one direction, so that the light spot irradiation angle in one horizontal direction of the fingerprint shooting area irradiated into the shooting selection area opening 12 is adjusted, and the adjustment in the other horizontal direction of the light source can be realized through a tiny movable cassette.

As shown in fig. 1, the cassette 1 of the present invention is provided with an electrical contact 3, and the electrical contact 3 is electrically connected to the lamp bead, the beam intensity adjusting mechanism, the beam diameter adjusting mechanism, and the light speed position adjusting mechanism. The imaging system on the top of the cassette 1 is electrically connected with the electrical contact 3 to supply power for the lamp bead, the light beam intensity adjusting mechanism, the light beam diameter adjusting mechanism and the light speed position adjusting mechanism.

Technical solution of the invention is described above with reference to the accompanying drawings, it is obvious that the specific implementation of the invention is not limited by the above-mentioned manner, and it is within the scope of the invention to adopt various insubstantial modifications of the inventive method concept and technical solution, or to apply the inventive concept and technical solution to other occasions without modification.