RU2510965C1 - Forensic expert video system - Google Patents

Abstract

FIELD: physics, optics.

SUBSTANCE: invention relates to means of authenticating bond paper and other secure printed product in different spectral ranges of visible, infrared and ultraviolet light which is reflected, slantwise incident or translucent. Disclosed is a video system which comprises a video camera with an objective lens, a ring mounting with a set of light filters, an object table with an illumination field window, a set of illuminators: yellow, green and blue LEDs, ultraviolet illuminators, as well as coinciding infrared LED illuminator and wide-band white light illuminator and located under the anti-glare glass of the illumination field window, an infrared LED illuminator under the anti-glare glass of the illumination field window. The firmware of the video system is designed for connecting the video system to the interface port of the system block of an external computer for preliminary setup thereof and adjustment for the next task.

EFFECT: high accuracy of determining the quality of the analysed product.

2 cl, 3 dwg

Description

The invention relates to the field of hardware and software functioning as part of an automated workstation designed for examinations, determining the authenticity and examination of documents, banknotes, securities and other secure printing products in various spectral ranges of visible, infrared and ultraviolet regions in reflected, oblique and transmitted light.

Currently, there are many devices designed to verify the authenticity of securities by irradiating them not visible to the human eye, such as infrared (IR) radiation. So, in RF patents №2106013 (02.27.1998), №2158443 (27.10.2000), №2172982 (08.28.2001), №2203188 (04.27.2003), certificates for the utility model of the Russian Federation №19194 (10.08.2001) and No. 20396 (10.27.2001), as well as in US patents No. 4650319 (03.17.1987) and No. 6438262 (08.20.2002), applications for US patent No. 2001/0035491 (01.11.2001) and No. 2002/0051562 (02.05. 2002), EPO application No. 0878781 (11/18/1998) and international application No. WO 02/0 71348 (09/12/2002) describe various devices incorporating infrared emitters and corresponding receivers (sensors) of this radiation.

Also known are devices for verifying the authenticity of banknotes by irradiating them with ultraviolet (UV) radiation invisible to human eyes, for example, RF patent No. 2123723 (04/01/1997).

Each of the aforementioned known devices allows you to check a single security paper for the presence of, as a rule, one or two of the security features invisible to the human eye, therefore, to identify all the signs, even for one security, it is necessary to use, as a rule, a number of various principles actions of devices. In this case, the controlled security must be sequentially moved from one device to another, performing each time after moving the security to the desktop of the next device, in addition to windows, this leads to a significant increase in the cost of verification work and a decrease in labor productivity. This drawback is especially felt when conducting forensic examinations related to determining the authenticity and research of a wide class of documents, banknotes, securities and other materials.

The prototype of the claimed forensic video complex is a well-known video complex for determining the authenticity of securities and / or documents, see patent for the invention of the Russian Federation No. 2320018, G07D 7/00, published March 20, 2006. The well-known video complex contains a set of video sources connected to an interface control unit nodes for setting, adjusting and switching the outputs of the video sources, to the inputs of which the outputs of the video sources are connected respectively, and its output is connected to one of the ports of the computer system unit. In it, at least one of the video sources is made in the form of a spectral camera having a case with a viewing window, inside of which the illumination sources are located directly in the ultraviolet, infrared, and individual sections of the visible wavelength range and oblique broadband and in predetermined sections of the visible wavelength range. In addition, it contains a video camera, as well as a switchable filter block with an independent drive, while the radiation sources and a switchable filter block are configured to interface control the settings and modes of operation of the backlight sources and select a filter corresponding to a given range of backlighting. In this case, the video sources can be made in the form of a color camera, comprising a housing with a viewing window, inside of which there is a color video camera and sources of illumination of direct and oblique white light; in the form of a survey camera containing a housing with a viewing window, inside of which there is a black-and-white image video camera and direct infrared and white light sources; and in the form of a video source containing a housing with a viewing window, inside of which a magneto-optical camera is placed and configured for interface control. To study objects in transmitted light, the video complex is equipped with an additional translucent table containing a case with a light-scattering window and a reflector and emitters placed inside the case in the infrared and visible wavelength ranges.

The disadvantage of the prototype is that it, like analogues, has limited functionality, as well as low quality of the examination and labor productivity.

The technical result of the utility model is to eliminate the above disadvantages, namely: expanding the functionality of the video complex, as well as improving both the quality of the examination and labor productivity.

To achieve the specified technical result, a new video complex is proposed, which, in comparison with the prototype, contains a larger number of illuminators (video sources) necessary for research with improved parameters of both the illuminators themselves and its optomechanical unit.

The proposed video complex contains: a closed light-tight enclosure with an entrance window and a door to this window, inside of which there is fixed an optomechanical unit in the form of an optically coupled main camera with a lens, a turret with a set of light filters, an object table with a translucent field window covered by frosted anti-glare glass , and a prism located under it, and an additional video camera, the optical axis of the lens of which is directed to the center of the window of the lumen field. In addition, a set of illuminators for the window of the luminal field of the subject table, which includes:

LED infrared illuminator emitting within the spectral range of wavelengths of 840-860 nanometers (nm),

LED infrared illuminator emitting within the spectral range of wavelengths of 930-950 nanometers,

LED broadband white light illuminator emitting within the spectral range of wavelengths with a color temperature of 4700 K-6500 K,

a red LED illuminator emitting within the spectral range of wavelengths of 620-640 nanometers,

yellow LED illuminator emitting within the spectral range of wavelengths of 580-600 nanometers,

green light emitting diode illuminator emitting within the spectral range of wavelengths 515-535 nanometers,

LED illuminator of blue glow emitting within the spectral range of wavelengths of 460-480 nanometers, the main and additional ultraviolet illuminators emitting within the spectral range of wavelengths of 360-370 nanometers,

primary and secondary ultraviolet illuminators emitting within the spectral range of wavelengths of 308-318 nanometers,

an ultraviolet illuminator emitting within the spectral range of wavelengths of 249-259 nanometers,

oblique LED infrared illuminator emitting within the spectral range of wavelengths of 840-860 nanometers,

oblique LED broadband white light illuminator emitting within the spectral range of wavelengths with a color temperature of 4700 K-6500 K,

located under the anti-reflective glass of the window of the lumen field, a broadband white light LED illuminator emitting within the spectral range of wavelengths with a color temperature of 4700 K-6500 K,

located under the anti-reflective glass of the window of the lumen field, an LED infrared illuminator emitting within the spectral range of wavelengths of 840-860 nanometers,

located under the anti-reflective glass of the window of the lumen field, a spotlight LED illuminator of broadband white light emitting within the spectral range of wavelengths with a color temperature of 4700 K-6500 K.

In addition to the foregoing, the video complex is equipped with hardware and software that allows it to be connected to the corresponding interface port of the system unit of an external computer to perform its preliminary configuration and adjustment for the next task to be performed, as well as examination, authentication and examination of documents, banknotes, securities and other materials in various spectral ranges of the visible, infrared and ultraviolet regions in reflected, oblique and transmitted light.

In order to further expand the functionality and quality of the examination, the main camera lens and turret with a set of light filters are equipped with electric drives controlled by hardware and software for pre-installation at the lens that meets the requirements of the task, focal length, aperture and scale, as well as installation between the main video camera and its lens of the corresponding filter by turning the turret with a set of filters around its axis of rotation Nia.

One of the possible structural options of the proposed video system is presented in figures 1, 2 and 3, which show:

Figure 1 is an inside view of the illuminators to the right of the viewing window.

Figure 2 is an inside view of the illuminators directly from the side of the viewing window.

Figure 3 is an inside view of the illuminators along the optical axis of the main video camera.

Also in figure 1, 2 and 3 are indicated:

1 - lightproof housing

2 - a window in an opaque case 1 for access to the window 5 of the lumen of the object table 4,

3 - window door in a lightproof housing 1,

4 - subject table,

5 - window of the lumen field of the object table 4,

6 - frosted anti-reflective glass,

7 - the main video camera,

8 - the lens of the main video camera 7,

9 - rotary turret with a set of light filters,

10 - an additional video camera mounted inside the opaque housing 1, the optical axis of the lens of which is directed to the center of the window 5 of the lumen of the object table 4,

11, 12, 13, 14, 15, 16, 17 and 18 - LEDs of an infrared illuminator emitting within the spectral range of wavelengths 840-860 nm,

19, 20, 21, 22, 23, 24, 25 and 26 - LEDs of an infrared illuminator emitting within the spectral range of wavelengths 930-950 nm,

27, 28, 29, 30, 31, 32, 23 and 34 — LEDs for a broadband white light illuminator emitting within the spectral range of wavelengths with a color temperature of 4700 K ÷ 6500 K,

35 - the main ultraviolet illuminator emitting within the spectral range of wavelengths 360 ÷ 370 nm,

36 - additional ultraviolet illuminator emitting within the spectral range of wavelengths 360 ÷ 370 nm,

37 - the main ultraviolet illuminator emitting within the spectral range of wavelengths 308 ÷ 318 nm,

38 - additional ultraviolet illuminator emitting within the spectral range of wavelengths 308 ÷ 318 nm,

39 - ultraviolet illuminator emitting within the spectral range of wavelengths 249 ÷ 259 nm,

40 - oblique LED illuminator of broadband white light emitting within the spectral range of wavelengths with a color temperature of 4700 K ÷ 6500 K

41 - oblique LED infrared illuminator emitting within the spectral range of wavelengths 840 ÷ 860 nm,

42 and 43 LEDs of the broadband white light illuminator located under the anti-reflective glass 6 of the window 5 of the transmissive field and emitting within the spectral range of wavelengths with a color temperature of 4700 K ÷ 6500 K,

44 - point LED illuminator of broadband white light located under the anti-reflective glass 6 of the window 5 of the lumen field and emitting within the spectral range of wavelengths with a color temperature of 4700 K ÷ 6500 K,

45 and 46 - LEDs of an infrared illuminator located under the anti-reflective glass 6 of the window 5 of the lumen field and emitting within the spectral range of wavelengths of 840 ÷ 860 nm,

47 - prism of the object table, located under the frosted anti-reflective glass 6 of the window 5 of the lumen field,

48, 49, 50, 51, 52, 53, 54, 55 — LEDs of a red illuminator emitting within the spectral range of wavelengths 620–640 nm,

56, 57, 58, 59, 60, 61, 62, 63 — LEDs of a yellow illuminator emitting within the spectral range of wavelengths 580–600 nm,

64, 65, 66, 67, 68, 69, 70, 71 — LEDs of a green illuminator emitting within the spectral range of wavelengths 515 ÷ 535 nm,

72, 73, 74, 75, 76, 77, 78, 79 - LEDs of the illuminator blue glow emitting within the spectral range of wavelengths 460 ÷ 480 nm,

80 - electric drive setting the focal length of the lens 8 of the main video camera 7,

81 - electric drive installation of the diaphragm of the lens 8 of the main video camera 7,

82 - electric drive setting the scale of the lens 8 of the main video camera 7,

83 - electric drive turning turret 9 with filters,

84 - ring board for mounting LED illuminators.

In the drawings, figures 1, 2 and 3 show one of the possible embodiments of the claimed video complex used for examinations, determining the authenticity and research of a wide class of documents, banknotes, securities and other materials in various spectral ranges of the visible, infrared and ultraviolet regions in reflected, oblique and transmitted light.

The video complex is a hardware-software tool that operates as part of an automated workstation, comprising a closed light-tight enclosure 1, having a window 2 with a door 3 for accessing the window 5 of the luminal field of the object table 4. Inside the case 1, an optomechanical unit is fixed in the form of optically coupled between each other the main video camera 7, the lens 8 to it, the turret 9 with a set of light filters, the object table 4 with the window 5 of the lumen field, closed frosted anti-glare glass 6 and fixed inside the housing 1 of the additional video camera 10, the optical axis of the lens of which is directed to the center of the window 5 of the translucent field. In addition, inside the housing 1, a set of specialized illuminators of the window 5 of the clearance field is fixed, including a set of illuminators placed around the optical axis of the main video camera 7 with lens 8, both using the ring board 84 and without it: an infrared illuminator with LEDs 11 , 12, 13, 14, 15, 16, 17 and 18, emitting within the spectral range of wavelengths of 840-860 nm, an infrared illuminator with LEDs 19, 20, 21, 22, 23, 24, 25 and 26, emitting within spectral range of wavelengths 930 ÷ 950 nm, broadband illuminator white light on the LEDs 27, 28, 29, 30, 31, 32, 33 and 34, emitting within the spectral range of wavelengths with a color temperature of 4700 K-6500 K, the main ultraviolet illuminator 35, emitting within the spectral range of wavelengths 360 ÷ 370 nm, additional ultraviolet illuminator 36, emitting within the spectral range of wavelengths 360 ÷ 370 nm, primary ultraviolet illuminator 37, emitting within the spectral range of wavelengths 308 ÷ 318 nm, additional ultraviolet illuminator 38, emitting within spectrally 308 ÷ 318 nm wavelength range, an ultraviolet illuminator 39 emitting within the spectral wavelength range of 249 ÷ 259 nm, an oblique LED illuminator 40 for white broadband light with a wavelength range with a color temperature of 4700 K ÷ 6500 K, an oblique LED infrared illuminator 41 emitting within the spectral range of wavelengths 840–860 nm, a broadband white light illuminator with LEDs 42 and 43, located under the frosted anti-reflective glass 6 of the window 5 of the transmissive field and emitting within the spectrum the full range of wavelengths with a color temperature of 4700 K ÷ 6500 K, a spotlight LED illuminator 44 wideband white light, located under the frosted anti-reflective glass 6 of the window 5 of the transmissive field and emitting within the spectral range of wavelengths with a color temperature of 4700 K ÷ 6500 K, LED infrared illuminator with LEDs 45 and 46, located under the frosted anti-reflective glass 6 of the window 5 of the transmissive field and emitting within the spectral range of wavelengths 840 ÷ 860 nm, prism 47 of the object table 4, located located under the frosted anti-reflective glass 6 of the window 5 of the lumen field, a red illuminator on the LEDs 48, 49, 50, 51, 52, 53, 54 and 55, emitting within the spectral range of wavelengths 620 ÷ 640 nm, a yellow LED illuminator on the LEDs 56, 57, 58, 59, 60, 61, 62 and 63, emitting within the spectral range of wavelengths 580 ÷ 600 nm, a green luminaire with LEDs 64, 65, 66, 67, 68, 69, 70 and 71, emitting within the spectral range of wavelengths of 515 ÷ 535 nm, a blue illuminator with LEDs 72, 73, 74, 75, 76, 77, 78 and 79, emitting in the affairs of the spectral range of wavelengths 460 ÷ 480 nm,

The lens 8 of the main video camera 7 is a macro zoom with electric drives 80, 81 and 82, allowing you to set the focal length, aperture and zoom, respectively, for the task being performed. For installation between the main video camera 7 and its lens 8 of the corresponding filter, there is a rotary turret 6 with a set of filters. The rotation of the turret 6 around its axis is carried out using an electric drive 83.

To configure the video complex to meet the requirements of the task at hand, as well as to carry out video spectral monitoring of the object under study, the video complex is equipped with hardware and software (not shown in Figs. 1, 2, and 3, since the hardware and software are structurally designed as a series of nodes, each of which is included the composition of the corresponding part of the video complex that it controls, such as illuminators). To ensure the interaction of the optomechanical unit and all illuminators with the system unit of an external computer, the optomechanical unit and all illuminators of the video complex are designed to be controlled using hardware and software. The hardware and software allows you to connect the video complex to the corresponding interface input of the system unit of an external computer, and then, by issuing commands from an external computer at the program level, select, configure and activate the corresponding illuminators, select a video camera 7 or 10, adjust the lens 8 by choosing an aperture, focal distance and scale, using the appropriate electric drives 81, 80 and 82, selecting the appropriate filter by turning the turret 9 around its axis and rotation drive 83, as well as the operation of the primary and secondary video cameras 7 and 10.

The video complex for conducting examinations, determining the authenticity and examination of documents, banknotes, securities and other secure printing products in various spectral ranges of visible, infrared and ultraviolet regions in reflected, oblique and transmitted light is a highly effective tool in the hands of an expert, therefore, it operates with his direct participation.

Depending on the complexity of the task assigned to the examination, the expert determines the nature and scope of the research, as well as the selection and configuration, using hardware and software of specific specialized video sources and an optomechanical unit.

The video complex allows the possibility of work using video sources as one of them, or in combination with its other video sources in any sequence. The start of the video complex includes the placement of the test material in the window 5 of the luminous field of the object table 4, the selection and adjustment of the illuminator, its mode of operation, the selection of an appropriate filter, as well as obtaining images using a video camera 7 or 10 for further research to determine the authenticity of the investigated object. Since each of these stages significantly affects the results of research, and the possibilities of a person are not unlimited, the most complex actions, for example, selecting and adjusting the backlight sources, choosing their mode of operation, choosing a light filter, setting the necessary aperture, focal length and zoom ratio of lens 8, etc. . performed using computer technology. Therefore, the video sources are configured to interface control them. The choice of the interface itself in this case does not matter. Investigations are made on the object as a whole, as well as its specific parts.

The full use of the capabilities of the video complex for determining the authenticity and research of documents, banknotes, securities and other materials allows to ensure:

during control in reflected visible light - distinct visibility on the monitor screen of a personal computer (PC) of micrographs, typographic methods, erasures, and features of a print imprint (stamp);

when monitoring in oblique visible light - a clear visibility on the PC monitor of the material structure, printing methods (high, flat or deep), relief elements of the picture, and together with an additional video camera 10 - the detection of latent images and the study of color-variable printing inks;

when monitoring in transmitted visible light - distinct visibility on the PC monitor screen of watermarks, compatible code patterns, security threads and strips, material structure, cleanings;

when monitoring in ultraviolet light - the visibility on the PC monitor screen of the luminescence of elements made with phosphor paints, protective fibers and threads, the absence of a common background of paper luminescence, etc.

This useful model may be applicable in the development of video systems for authenticating securities and / or documents. It is obvious for a specialist that this utility model sufficiently reveals the possibilities of creating a video complex that allows using it to verify the authenticity of securities and / or documents, controlling their presence or absence of a large group of various security features. The presence of the video complex provides an opportunity to significantly expand its functionality, improve the quality of research, labor productivity, as well as reduce the cost of conducting work related to authentication. Any such and other modifications whose features are equivalent to those of the attached formula of a utility model should be considered to fall within the scope of its rights.

Claims (2)

1. The forensic video complex containing a closed light-tight housing with an entrance window and a door to this window, inside of which are fixed: optomechanical unit in the form of a main video camera with a lens optically interconnected, turrets with a set of light filters, an object table with a window of the translucent field closed frosted anti-reflective glass, and a prism located under it, and an additional video camera, the optical axis of the lens of which is directed to the center of the window of the lumen field, a set of window illuminators The light field of the object table, namely: an LED infrared illuminator emitting within the spectral range of wavelengths of 840 ÷ 860 nanometers, an LED infrared illuminator emitting within the spectral range of wavelengths of 930 ÷ 950 nanometers, an LED broadband white illuminator emitting within the spectral range wavelength range with a color temperature of 4700 K ÷ 6500 K, a red LED illuminator emitting within the spectral range of wavelengths of 620 ÷ 640 nanometers, LED yellow illuminator emitting within the spectral range of wavelengths of 580 ÷ 600 nanometers, LED green illuminator emitting within the spectral range of wavelengths of 515 ÷ 535 nanometers, LED illuminator of blue glow emitting within the spectral range of wavelengths of 460 ÷ 480 nanometers , the main and additional ultraviolet illuminators emitting within the spectral range of wavelengths of 360 ÷ 370 nanometers, the main and additional ultraviolet illuminators emitting in in the spectral range of wavelengths of 308–318 nanometers, an ultraviolet illuminator emitting within the spectral range of wavelengths of 249–259 nanometers, an oblique LED infrared illuminator emitting within the spectral range of wavelengths of 840–860 nanometers, an oblique LED broadband white light emitting within the spectral range of wavelengths with a color temperature of 4700 K ÷ 6500 K, located under the anti-reflective glass of the window of the lumen field, the LED illuminator is wide white strip light emitting within the spectral range of wavelengths with a color temperature of 4700 K ÷ 6500 K, located under the anti-reflective glass of the window of the lumen field, an LED infrared illuminator emitting within the spectral range of wavelengths of 840 ÷ 860 nanometers, located under the anti-reflective glass of the window of the lumen fields, a spotlight LED illuminator for broadband white light emitting within the spectral range of wavelengths with a color temperature of 4700 K ÷ 6500 K, as well as hardware and software Provision for connecting the video complex to the corresponding interface port of the system unit of an external computer to perform its preliminary configuration and adjustment for the next task to be performed, as well as conducting examinations, determining the authenticity and examination of documents, banknotes, securities and other materials in various spectral ranges of the visible, infrared and ultraviolet areas in reflected, oblique and transmitted light. 2. The forensic video complex according to claim 1, characterized in that the lens of the main video camera and the turret with a set of optical filters are equipped with electric drives controlled by hardware and software for pre-installation at the lens that meets the requirements of the task, focal length, aperture and scale, and also the installation between the main video camera and its lens of the corresponding filter by turning the turret with a set of filters around its axis of rotation.

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