CN216490680U - Camera device, and laser holographic imaging device and system adopting same - Google Patents
Camera device, and laser holographic imaging device and system adopting same Download PDFInfo
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Abstract
The utility model discloses a camera device, a laser holographic imaging device and a laser holographic imaging system adopting the same, wherein the camera device comprises a camera device element and a lens connected with the camera device element; the camera element is a CCD element or a CMOS element, the camera element is a large target surface camera element with the length of more than 1 inch, and the lens adopts one of a lens with the focal length of less than 35mm, a lens with the focal length of 50mm or 85mm, a lens with the focal length of 100mm or 135mm, a zoom lens with the focal length of 24-105mm and a lens with the focal length of 24-75 mm. The holographic imaging detection device comprises: each group of detection light sources comprises at least one lamp bead, and the detection light sources are used for emitting detection illumination light and realizing gradual change of illumination angles of the detection illumination light on an imaging object according to a sequence; and the camera device is used for receiving the light projected by the imaging object irradiated by the detection light source and obtaining image data formed by light interference.
Description
Technical Field
The utility model relates to the field of anti-counterfeiting detection devices, in particular to a camera device, and a laser holographic imaging device and system adopting the camera device.
Background
The existing laser holographic pattern detection device is in a cross-shaped dot shape or an annular dot shape, is excited by a single-point lamp and focuses on a laser hologram at the central position of a lamp light irradiation point, and the defects of the acquisition mode are as follows; firstly, the irradiation area of a point light source is limited, a laser hologram cannot be transversely or longitudinally displayed completely, only point hologram patterns of an illumination part can be displayed, and a great amount of other part image-text information with the same detection material abscissa or ordinate can be omitted; secondly, complete laser holographic patterns of the detection sample cannot be displayed comprehensively and integrally, and particularly, laser holographic information at the edge cannot be displayed; and thirdly, the method cannot adapt to the data acquisition and analysis of the pattern and the angle change in one-to-one correspondence. In addition, most of the laser holographic pattern excitation devices in the prior art irradiate through a single-sided unidirectional light source, the defects are that the laser holographic pattern detection application of multidirectional printing is limited, the one-to-one correspondence relation between the three-dimensional position of the light source and the displayed laser holographic pattern effect and the data analysis of the image-text angle characteristics are difficult to achieve, the light excitation pattern schematic diagrams of the existing laser holographic pattern excitation devices are shown in the figures 1 and 2, and the existing light excitation mode is single in pattern and limited in irradiation area. Therefore, with the continuous innovation of the laser holographic image anti-counterfeiting technology, it is urgently needed to develop a new laser holographic pattern collecting and analyzing system and method to match with the same.
Disclosure of Invention
The utility model provides a camera device, a laser holographic imaging device and a laser holographic imaging system, aiming at the problems in the prior art, and the camera device, the laser holographic imaging device and the laser holographic imaging system can display various patterns in the same laser holographic anti-counterfeiting image one by one or sequentially decrypt and display the patterns one by one according to an image encryption method and can identify the relative position relationship between each pattern and a detection light source. The technical scheme of the utility model is as follows:
in a first aspect, the present invention provides an image pickup apparatus comprising an image pickup device element and a lens connected to the image pickup device element; the camera element is a CCD element or a CMOS element, the camera element is a large target surface camera element with the length of more than 1 inch, and the lens adopts one of a lens with the focal length of less than 35mm, a lens with the focal length of 50mm or 85mm, a lens with the focal length of 100mm or 135mm, a zoom lens with the focal length of 24-105mm and a lens with the focal length of 24-75 mm.
Furthermore, the camera device element is arranged in a shell, a standard C-type interface or a CS interface is arranged on the shell, and the interface is connected with the lens through a switching ring.
In a second aspect, the present invention provides a holographic imaging detection apparatus comprising:
each group of detection light sources comprises at least one lamp bead, and the detection light sources are used for emitting detection illumination light and realizing gradual change of illumination angles of the detection illumination light on an imaging object according to a sequence;
the camera device is used for receiving the light projected by the imaging object irradiated by the detection light source and obtaining the image data formed by light interference.
Further, when the detecting light sources are 1 group, the device further comprises a moving mechanism, the moving mechanism is connected with at least one of the detecting light sources and the imaging object, and drives at least one of the detecting light sources and the imaging object to move, so that the illumination angles of the detecting light emitted by the detecting light sources on the imaging object gradually change in sequence.
Further, when the number of the detection light sources is 2 or more, a plurality of sets of the detection light sources are sequentially arranged above the imaging object.
In a third aspect, the present invention provides a holographic imaging detection system, comprising: the laser holographic imaging detection device comprises a laser holographic imaging detection device and a data processing and storing device connected with the laser holographic imaging detection device, wherein the data processing and storing device is used for adjusting parameters of a camera device of the holographic imaging device, acquiring image data and detecting relative position relation data of a light source and an imaging object, and forming and storing a holographic image according to the data.
Further, the data processing device further comprises an image comparison device, and the image comparison device is used for comparing, contrasting and labeling the standard image sample and the holographic image formed by the imaging object.
Optionally, an alarm module is installed on the image comparison device, and when the holographic image formed by the imaging object is not matched with the standard image sample, the alarm module sends out an alarm signal.
The utility model has the beneficial effects that:
1. the camera device can generate excellent imaging acquisition effect on various detected materials, is durable and is suitable for being equipped in various anti-counterfeiting imaging devices or systems.
2. The imaging device can realize gradual change of the irradiation angles of the detection illumination light rays on the imaging object according to the sequence, the radiation surface is the whole detection object, the integral display of the laser holographic patterns in the same direction and the observation and recording of the relative position relation with the detection light source are facilitated, and the one-to-one corresponding relation between the detection light source position and the holographic pattern display is realized.
3. The holographic imaging detection system provided by the utility model combines the image acquisition equipment and the data processing equipment, acquires and analyzes on the basis of multi-dimensional and multi-angle excitation imaging, and facilitates the summary analysis and evidence storage of the change rule of the laser holographic image-text.
Drawings
Fig. 1 is a schematic diagram of a ray excitation pattern of a conventional cross point laser holographic pattern excitation device.
Fig. 2 is a schematic diagram of a light excitation pattern of a conventional annular dot laser hologram pattern excitation device.
Fig. 3 is a schematic structural diagram of the image pickup apparatus of the present invention, wherein a is an image pickup apparatus element, b is a lens, and c is an adapter ring.
FIG. 4 is a schematic diagram of a laser holographic imaging apparatus of the present invention (a single set of detection light sources).
FIG. 5 is another schematic diagram (multiple groups of detection light sources) of the laser holographic imaging device of the present invention.
In fig. 4 and 5, 1 ' -image pickup device, 2 ' -detection light source, 3 ' -moving mechanism, 4 ' -imaging object, 5 ' -detection stage.
FIG. 6 is a schematic diagram of various arrangements of the material to be inspected and the detection light sources in the laser holographic imaging apparatus of the present invention, wherein FIG. 1 shows that a plurality of sets of detection light sources are arranged in parallel above the material to be inspected, with the xz plane in the three-dimensional coordinate system as a plane and extending along the x axis; FIG. 2 shows that the multiple groups of detection light sources are arranged in parallel on the right side of the material to be inspected, taking the yz plane in the three-dimensional coordinate system as a plane and extending along the y axis; FIG. 3 shows that the multiple groups of detection light sources are arranged in parallel on the left of the material to be detected, taking the yz plane in the three-dimensional coordinate system as a plane and extending along the y axis; FIG. 4 shows that the multiple groups of detection light sources extend along the y axis with the xy plane in the three-dimensional coordinate system as the plane and are arranged behind the material to be detected in parallel; FIG. 5 shows that the multiple groups of detection light sources extend along the y-axis with the xy-plane in the three-dimensional coordinate system as the plane and are arranged in front of the material to be detected in parallel; FIG. 6 shows that the multiple groups of detection light sources extend upwards along the same angle with the xy plane in the three-dimensional coordinate system as a plane and are arranged above the side of the material to be detected in parallel; FIG. 7 shows that multiple groups of detection light sources are arranged in parallel above the material to be detected in an arc distribution (the radian of the arc is not limited to 180 °); FIG. 8 is a view showing that the multiple groups of detection light sources shown in FIG. 7 are rotated by an angle; in the figures (1) to (8), 1 is a material to be detected, 2 is a single-group detection light source, and 3 is a whole detection light source.
FIG. 7 is a schematic diagram of the structure of a laser holographic imaging system of the present invention.
Detailed Description
The utility model is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
An embodiment of the present invention provides an image pickup apparatus, as shown in fig. 3, including: an imaging device element and a lens connected to the imaging device element. The image pickup device element is a CCD element or a CMOS element, that is, an image pickup device element using an industrial camera, and the image pickup device element is a large target surface image pickup device of 1 inch or more, preferably 2 inches. The lens adopts one of a lens with a focal length below 35mm, a lens with a focal length of 50mm or 85mm, a lens with a focal length of 100mm or 135mm, a zoom lens with a focal length of 24-105mm and a zoom lens with a focal length of 24-75mm, namely the lens of a single lens reflex, and preferably adopts a lens with a focal length of 24-105mm or a zoom lens with a focal length of 24-75 mm. The camera device element is arranged in a shell, a standard C-type interface or a CS interface is arranged on the shell, and the interface is connected with the lens through a switching ring.
In the existing equipment for acquiring holographic images, an integrated camera module or a civil single lens reflex camera module is generally used. The wide-angle lens is generally adopted in the integrated camera module, the deformation of the edge of a view field is easy to occur, and the problem of video output function damage exists when the single lens reflex camera module is used for a long time. The utility model also adopts two conventional image acquisition devices in the research process, but in the process of one-time experiment debugging, because the camera module and the single lens reflex module both have faults, the camera body (containing a large-size image sensor element) of the industrial camera is temporarily detached to be matched with the common single lens reflex camera to continue acquisition, and the result shows that the new assembly mode can obtain a very good acquisition effect. The inventor further tests that the lens of the civil camera is matched with the body of the industrial camera, and as a result, the image picture cannot fully display the picture view field, and most of the edge of the image in the middle is a black frame phenomenon, which seriously affects the use. In addition, the common single-lens reflex (or single-lens reflex) camera module has a serious problem that a camera chip is easily burnt after a video output function is used for a long time. Therefore, the embodiment of the present invention preferably adopts the above-mentioned camera device for image acquisition.
The specific embodiment of the present invention further provides a holographic imaging detection apparatus, including:
each group of detection light sources comprises at least one lamp bead, and the detection light sources are used for emitting detection illumination light and realizing gradual change of illumination angles of the detection illumination light on an imaging object according to a sequence; the device also comprises a camera device which is used for receiving the light projected by the imaging object irradiated by the detection light source and obtaining the image data formed by the interference of the light.
Specifically, in some embodiments of the present invention, as shown in fig. 4, the number of the detection light sources is 1, the number of the lamp beads is 1, the device further includes a moving mechanism, the detection light sources are fixed on the moving mechanism, and can be driven by the moving mechanism to move up, down, left, right, and back, so that the illumination angles of the detection light emitted by the detection light sources on the imaging object gradually change in sequence. The gradual change of the illumination angles in sequence can be as follows: 1) the irradiation angle of the detection light emitted by the detection light source on the imaging object gradually changes from 0 degrees to a certain angle between 0 and 180 degrees; or, 2) the irradiation angle of the detection light emitted by the detection light source on the imaging object gradually changes from a certain angle between 0 and 180 degrees to approximately 0 degree; or 3) the irradiation angle of the detection light emitted by the detection light source on the imaging object is gradually changed from a certain angle between 0 and 180 degrees to another angle between 0 and 180 degrees. The gradual change can be from a large angle to a small angle, and can also be from a small angle to a large angle. In the gradual change process of the irradiation angle, the position of the detection light source and the whole system image show one-to-one correspondence, so that the later period summary analysis of the change rule of the laser holographic image and the evidence storage are facilitated.
The moving mechanism can adopt the existing devices such as the existing guide post screw structure, the worm gear structure, the gear rack structure, the guide rail screw structure and the like or the combination of the existing devices, so as to realize the up-down, left-right and front-back movement of the detection light source.
In other embodiments of the present invention, as shown in fig. 5, the number of the detection light sources is 2 or more, 2 or more detection light sources are sequentially arranged above the imaging object, and the gradual change of the irradiation angle of the detection light emitted by the detection light sources on the imaging object is realized by sequentially turning on and off 2 or more detection light sources. In this configuration, there are many arrangements of the detection light source and the material to be detected, as shown in fig. 6, the first: the multiple groups of detection light sources are arranged by taking an xz surface in a three-dimensional coordinate system as a plane, extend along the x axis and are arranged above the material to be detected in parallel. And the second method comprises the following steps: the multiple groups of detection light sources are arranged by taking yz surfaces in a three-dimensional coordinate system as planes, extend along the y axis and are arranged on the right side of the material to be detected in parallel. And the third is that: the multiple groups of detection light sources are arranged by taking a yz surface in a three-dimensional coordinate system as a plane, extend along the y axis and are arranged on the left of the material detection in parallel. And fourthly: the multiple groups of detection light sources are arranged by taking an xy surface in a three-dimensional coordinate system as a plane, extend along a y axis and are arranged behind the detection material in parallel. And a fifth mode: the multiple groups of detection light sources are arranged by taking an xy plane in a three-dimensional coordinate system as a plane, extend along a y axis and are arranged in front of the detection material in parallel. And a sixth mode: the multi-group detection light sources are arranged by taking an xy surface in a three-dimensional coordinate system as a plane, inclined at a certain angle with a horizontal line and extending upwards, and arranged above the side of the detection material in parallel. Seventh, the method comprises: the multiple groups of detection light sources are arranged in parallel above the material to be detected in an arc distribution mode (the radian of the arc is not limited to 180 degrees). An eighth method: and rotating the arc shape formed by arranging the multiple groups of detection light sources in the seventh mode by an angle. The above 8 arrangement modes also realize gradual change of the irradiation angle of the detection light emitted by the detection light source on the imaging object according to a sequence by sequentially turning on and off the detection light source according to a certain starting direction, so that a whole irradiation surface can be formed on the imaging object, and the one-to-one correspondence relationship between the position of the detection light source and the display of the holographic pattern is realized, thereby facilitating the search of detection rules and the summary analysis of data.
In addition, for the whole imaging object of better messenger's light irradiation that the light source sent, the quantity of lamp pearl can be a plurality ofly in every group light source that detects to turn on and off simultaneously.
The specific embodiment of the present invention further provides a holographic imaging detection system, as shown in fig. 7, including: the laser holographic imaging detection device comprises a laser holographic imaging detection device and a data processing and storing device connected with the laser holographic imaging detection device, wherein the data processing and storing device is used for adjusting parameters of a camera device of the holographic imaging device, acquiring image data and detecting relative position relation data of a light source and an imaging object, and forming and storing a holographic image according to the data.
Specifically, the data processing apparatus is a computer or a mobile terminal device. Further, the data processing device further comprises an image comparison device, and the image comparison device is used for comparing, contrasting and labeling the standard holographic image sample and the holographic image formed by the imaging object. Such as: if the imaging object is a Chinese passport, the standard passport sample is a holographic image obtained by detecting the standard passport sample provided by Chinese official authorities. The image comparison device may employ conventional commercially available image recognition and comparison software. In order to better identify the authenticity and the imaging effect of an imaging object, the image comparison device can be further provided with an alarm module, the image comparison device automatically compares the acquired holographic image with the standard image sample, when the holographic image is not matched with the standard image sample, for example, color requirements of each area in the standard image are clearly defined, once the holographic image does not meet the color requirements, the alarm module is triggered, and the alarm module sends out an alarm signal, such as X display on an interface, red lamp bead flashing display, screen flashing once and the like.
The method for collecting and analyzing the laser holographic pattern by adopting the system comprises the following steps:
(1) adjusting the positions of the imaging object and the detection light source, and ensuring that the light rays emitted by the detection light source irradiate the whole imaging object;
(2) starting a detection light source, enabling light rays emitted by the detection light source to form a certain irradiation angle with an imaging object, then adjusting the irradiation angle to gradually change in sequence, ensuring that the light rays continuously irradiate the whole imaging object in the gradual change process, simultaneously recording optical signals of the imaging object in the holographic image change process by a camera device, forming image data and transmitting the image data to a data processing device;
(3) and processing the image data into a holographic image through a data processing device and storing the holographic image until the laser holographic pattern of the imaging object is completely displayed, and regularly analyzing the image result and the relative position of the imaging object and the detection light source.
Specifically, when the detection light sources are in one group, the method specifically comprises the following steps:
(1) the detection light source is connected with the moving mechanism, the detection light source is moved to one side of the imaging object, the detection light source is started, the light rays emitted by the detection light source are ensured to irradiate the whole imaging object at an angle close to 0 degree, and the camera device records optical signals and forms image data to be transmitted to the data processing device;
(2) moving the excitation light source to the next radiation angle through the moving mechanism to ensure that the light emitted by the excitation light source irradiates the whole imaging object at an angle higher than that in the step (1), and recording an optical signal by the camera device, forming image data and transmitting the image data to the data processing device;
(3) and in the same way, gradually moving the excitation light source to increase the radiation angle of the light until the laser holographic film pattern of the imaging object is completely displayed, and regularly analyzing the result and the relative position of the imaging object and the detection light source.
Of course, in the case that the detection light sources are a group, the irradiation angle may be gradually changed from a large angle to a small angle according to an initial angle of 90 ° or other initial angles between 0 ° and 180 °.
When the detection light sources are multiple groups, the method specifically comprises the following steps:
(1) placing the imaging object below the detection light sources, starting the detection light sources one by one to test whether the light rays emitted by each group of detection light sources irradiate the whole imaging object, and adjusting the positions of the imaging objects to ensure that the light rays emitted by each group of detection light sources irradiate the whole imaging object; fig. 6 provides 8 relative positional relationships of the imaging subject and the detection light source, but the relative positions of the two are not limited to these 8.
(2) Gradually turning on and off the detection light source according to a certain sequence, such as the sequence from one side of the detection light source to the other side, so as to realize gradual change of the irradiation angle according to the sequence, simultaneously recording an optical signal in the holographic image change process of the imaging object by the camera device, forming image data and transmitting the image data to the data processing device; and performing regular analysis on the result and the relative position of the imaging object and the detection light source until the laser holographic film pattern of the imaging object is completely displayed.
Example 1
The embodiment provides an image acquisition and analysis method of a Chinese passport, which adopts a holographic imaging detection device and a system containing 5 groups of detection light sources, wherein each group of detection light sources comprises 5 lamp beads, and the method specifically comprises the following steps:
firstly, the detection light sources are arranged above the material to be detected according to the arrangement mode of (6) in figure 6, then the detection light sources at the near end of the material to be detected (as the first detection light source to be started) are started, the laser holographic anti-counterfeiting patterns are uploaded to a computer for display after image acquisition is carried out by an image sensor, and meanwhile, three-dimensional position information, angle information and the like of the detection light sources are acquired, and the detection light sources are started and stopped one by one from the near end of the material to the far end in sequence for detection, and the holographic patterns of the material to be detected with different irradiation angles are acquired. And automatically comparing the laser holographic pattern with a standard Chinese passport sample picture in a computer, if the passport is true, displaying the passport to pass, if the passport is false, immediately triggering an alarm module to send out an alarm, automatically performing the comparison, comparison and labeling processes on the computer, finally storing or printing and outputting a detection result, and performing the next step of summarizing and analyzing the change rule of the laser holographic pattern, wherein the whole acquisition and analysis process is finished.
In this embodiment, we design the detection light sources with multiple dimensions as shown in fig. 6 for the laser hologram films (passports) with different plate-making, and more light source configuration combinations with different main directions can be provided according to different laser hologram films, and the light source mechanisms of any one to two main directions can be adjusted according to the above method. Laser holographic patterns of different plate-making can be displayed. We conclude that: if the illumination angle of the detection light source on the material to be detected is gradually changed according to a certain mode, the color and brightness of the formed holographic patterns are also changed in sequence, and on a complete material to be detected, the illumination light source takes a certain position as an illumination central point (for example, the center of the detection material is taken as the central point), at this time, the initial position (top position) and the end position (bottom position) of the detection material are different from the light rays illuminating the central position, and when laser holograms are respectively printed on the top position, the central position and the bottom position of the material to be detected, the holographic pattern result of the material to be detected illuminated by the light source at each angle position is different from the holographic patterns at the top position, the central position and the bottom position, and the presented change rule is not completely consistent.
Example 2
The embodiment provides an image acquisition and analysis method for a certain anti-counterfeiting icon, the adopted device and system are the same as those in embodiment 1, and the method flow is the same as that in embodiment 1. The formed holographic image is also formed by gradually changing the irradiation angle of the detection light source irradiating the material to be detected so as to gradually make the detection present clear and complete holographic patterns.
Example 3
The embodiment provides an image acquisition and analysis method of a certain Chinese identity card, the adopted device and system are the same as those in embodiment 1, and the method flow is the same as that in embodiment 1. The irradiation angle irradiated on the material to be detected by the detection light source is gradually changed in a gradual mode so that the material to be detected presents clear and complete holographic patterns.
In conclusion, the camera device of the utility model can generate excellent imaging acquisition effect on various inspection materials, is durable and is suitable for being equipped in various anti-counterfeiting imaging devices or systems. The imaging device can realize that the irradiation angles of the detection illumination light on the imaging object gradually change in sequence, the radiation surface is the whole detection object, the integral display of the laser holographic patterns in the same direction and the observation and recording of the relative position relation between the detection light source are facilitated, and the one-to-one correspondence between the detection light source positions and the holographic pattern display is realized. In addition, the holographic imaging detection system provided by the utility model combines the image acquisition equipment and the data processing equipment, acquires and analyzes on the basis of multi-dimensional and multi-angle excitation imaging, and facilitates the summary analysis and evidence storage of the laser holographic image-text change rule. .
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. An image pickup apparatus characterized in that: the device comprises an image pickup device element and a lens connected with the image pickup device element; the camera element is a CCD element or a CMOS element, the camera element is a large target surface camera element with the length of more than 1 inch, and the lens adopts one of a lens with the focal length of less than 35mm, a lens with the focal length of 50mm or 85mm, a lens with the focal length of 100mm or 135mm, a zoom lens with the focal length of 24-105mm and a lens with the focal length of 24-75 mm.
2. The image pickup apparatus according to claim 1, wherein: the camera device element is arranged in a shell, a standard C-type interface or a CS interface is arranged on the shell, and the interface is connected with the lens through a switching ring.
3. A holographic imaging detection apparatus, comprising: the method comprises the following steps:
each group of detection light sources comprises at least one lamp bead, and the detection light sources are used for emitting detection illumination light and realizing gradual change of illumination angles of the detection illumination light on an imaging object according to a sequence;
the imaging apparatus according to claim 1 or 2, configured to receive light projected by the detection light source from the imaging object, and obtain image data formed by light interference.
4. The holographic imaging detection device of claim 3, wherein: when the detection light sources are 1 group, the device further comprises a moving mechanism, the moving mechanism is connected with at least one of the detection light sources and the imaging object, and drives at least one of the detection light sources and the imaging object to move, so that the illumination angles of the detection light emitted by the detection light sources on the imaging object gradually change in sequence.
5. The holographic imaging detection device of claim 3, wherein: when the number of the detection light sources is more than 2, the detection light sources are sequentially arranged above the imaging object.
6. A holographic imaging detection system, characterized by: the method comprises the following steps: the holographic imaging detection device of any one of claims 3 to 5, and a data processing and storing device connected to the holographic imaging detection device, wherein the data processing and storing device is configured to adjust parameters of an image capturing device of the holographic imaging device, collect image data and data of a relative position relationship between a detection light source and an imaging object, and form and store a holographic image according to the data.
7. The holographic imaging detection system of claim 6, wherein: the data processing and storing device also comprises an image comparison device, and the image comparison device is used for comparing, contrasting and labeling the standard image sample and the holographic image formed by the imaging object.
8. The holographic imaging detection system of claim 7, wherein: and the image comparison device is provided with an alarm module, and when the holographic image formed by the imaging object is not matched with the standard image sample, the alarm module sends out an alarm signal.
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