Anamorphic reader system papillary drawings and method of use

 

The invention relates to the capture and transfer images papillary patterns preferably the fingers. Its application in automated biometric information system identification allows to obtain a technical result in increasing the contrast of the obtained image and the reliability of its detection while reducing the size and cost of the device. This result is achieved due to the fact that the reflective prism is made from a substance with a refractive index ranging from 1.6 to 1.8 with dihedral angles between the working and reflecting faces in the range from 20 to 25obetween working and refracting faces in the range from 91 to 109o; CCD sensor connected to the controller and is inclined to the optical axis, forming an optical dihedral angle between the CCD and the refractive face of the prism in the angle range from 1 to 19othe light source contains light filter transmitting the wavelength range from 0.10 up to 2,20 μm. 2 C. and 7 C.p. f-crystals, 1 Il.

The technical field, Predlagaemoe device and method relate to the reading and transmission of images papillary pattern, preferably the fingers used is Analogues to the proposed device can be considered: 1. The reader fingerprint for identification, U.S. patent 5222152, MKI G 06 To 09/00, publ. 22.06.1993, including a light source, optical system, containing, including the prism for applying finger, and the recorder of the fingerprint image.

2. The device for recording the papillary pattern, RF patent 2185096, MCI And 61 In 5/117, publ. 20.07.2002, including a light source, optical system, containing, including the prism for applying finger, and a photodetection system elements connected to the image processor.

The disadvantages are the counterpart: not enough small linear dimensions of the optical system, the inability to distinguish fake from real papillary pattern, insufficient contrast different images papillary patterns due to the different characteristics required of papillary patterns and characteristics of lighting the faces of the prism, to which is applied a papillary pattern.

The closest in technical essence, a prototype for the proposed device is a display device fingerprint, U.S. patent 5625448, MKI G 06 To 09/00, publ. 29.04.1997, including a light source, optical system, containing, including the prism for applying palmy, the inability to distinguish fake from real papillary pattern, insufficient contrast different images papillary patterns due to the different characteristics required of papillary patterns and characteristics of lighting the faces of the prism, to which is applied a papillary pattern.

The inventive Image papillary pattern, obtained using optical scanners are accidental. Factors affecting the random nature of the resulting image can be, for example, the force pressing the surface with a papillary pattern to the surface of the scanner, the direction of the force pressed, temporary minor damage, humidity (dry) or contamination of the epidermis, etc. becomes Relevant improvement of the characteristics of the scanner, allowing to reduce the influence of harmful factors.

Geometrical dimensions of the optical system of the scanner it is possible to reduce the "squeezing" passed to the CCD image papillary pattern, exposing his anamorphosee and dianamartinova to obtain the desired undistorted image.

The objective of the invention is to reduce the linear dimensions of the optical system, increasing the reliability of u is x patterns, reducing the cost of the system.

Technical results of the invention: 1) reduction of the linear dimensions of the optical system; 2) increasing the reliability of recognition of this papillary pattern and model; 3) increasing the contrast of different images papillary patterns; 4) reducing the cost of the system.

Technical results achieved by the fact that anamorphic reader system papillary pattern contains a light source, optical system, including, including, a lens with aperture diaphragm and the reflective prism for applying the surface with a papillary pattern, and a CCD sensor. When this reflective prism is made from a substance with a refractive index ranging from 1.6 to 1.8, with dihedral angles between the working and reflecting faces in the range from 20 to 25obetween working and refracting faces in the range from 91 to 109o, CCD sensor connected to the controller and is inclined to the optical axis, forming an optical dihedral angle between the CCD and the refractive face of the prism in the angle range from 1 to 19othe light source-software-hardware-managed, includes an additional at least one software-hardware-driven light source or systems of waves from 0.10 up to 2,20 μm in the direction in which the prism projects, when passing through the optical system, CCD place direct contact between the papillary line with the working face of the prism, causing a high intensity signal is compared to a place free from direct contact.

The term "working face" of the reflective prism should understand the face to which is applied the surface with a papillary pattern.

The term "refractive face of the reflective prism should understand the face, which sent the lens optical system.

Anamorphic reader system papillary drawings may contain optical axis, changing its direction, for example, mirrors or prisms. This embodiment of the system can improve its compactness by reducing the distance between the reflective prism and CCD.

Anamorphic reader system papillary drawings may contain immersion lens. This embodiment of the system can improve its compactness by reducing the distance between the reflective prism and CCD.

The lens may include at least one, for example, an aspherical lens. This embodiment of the lens you get the nei is some execution lens allows you to increase the image quality of papillary pattern.

Way to use the anamorphic system is that the light source uses periodically, software-hardware.

The way to use anamorphic system may include increasing or decreasing periods of activation of the light source.

The way to use anamorphic system may include termination of the changing periods of activation of the light source after reaching a rational image contrast papillary pattern.

The way to use anamorphic system may include the use of light sources at different wavelengths.

The way to use anamorphic system may include management of the CCD computer.

Information confirming the possibility of carrying out the invention the Possibility of practical realization of the invention is illustrated by drawings and examples of actions that constitute the elements of the method of detection of papillary pattern.

The drawing shows a diagram of the anamorphic system.

Anamorphic reader system papillary pattern includes a light source 1, the optical system including the lens 2, the aperture diaphragm 3 and the reflective prism 4 for applying the surface of aausa faces 10, between working 9 and refractive 11 faces, respectively, of the CCD matrix 6 is connected with the controller 12 and is inclined to the optical axis 13, thus forming optical dihedral angle (not shown) between the CCD 6 and the refractive face 11 of the prism 4. An additional source of light (or system light filter) 14.

The manufacture of the prism can be carried out by known methods used in optics materials, such as glass grades K8, TV or PC.

Manufacture of other elements of the system can be carried out by known methods.

Way to use the anamorphic system is that the light source 1 uses periodically, software-hardware.

The way to use anamorphic system may include increasing or decreasing periods of activation of the light source.

The way to use anamorphic system may include termination of the changing periods of activation of the light source after reaching a rational image contrast papillary pattern.

The way to use anamorphic system may include the use of light sources at different wavelengths.

The way to use anamorphic system can polzovania can reduce the linear dimensions of the optical system; to increase the contrast of different images of papillary patterns and the accuracy of recognition of this papillary pattern and imitation; to reduce system cost.


Claims

1. Anamorphic reader system papillary drawings containing the light source, optical system, including, including, reflective prism for applying the surface with a papillary pattern, and a CCD sensor, characterized in that the reflective prism is made from a substance with a refractive index ranging from 1.6 to 1.8 with dihedral angles between the working and reflecting faces in the range from 20 to 25°, between working and refracting faces in the range from 91 to 109°, CCD sensor connected to the controller and inclined to the optical axis, forming optical dihedral angle between the CCD and the refractive face of the prism in the angle range from 1 to 19°, light source, software-hardware-managed, includes an additional at least one software-hardware-driven light source or system, at least one optical filter that allows you to receive electromagnetic radiation from the wavelength range from 0.10 up to 2,20 μm, the direction in which the prism procellaria line with the working face of the prism, causing a high intensity signal is compared to a place free from direct contact of the lens with the aperture diaphragm.

2. Anamorphic reader system papillary drawings under item 1, characterized in that the optical system of the optical axis can change direction.

3. Anamorphic reader system papillary drawings under item 2, characterized in that the change in the direction of the light beam in the optical system is at least one mirror.

4. Anamorphic reader system papillary drawings under item 2, characterized in that the change in the direction of the light beam in the optical system is at least one reflecting prism.

5. Anamorphic reader system papillary drawings according to any one of paragraphs.1-4, characterized in that the immersion lens.

6. Anamorphic reader system papillary drawings according to any one of paragraphs.1-5, characterized in that the lens includes an aspherical lens.

7. Anamorphic reader system papillary drawings according to any one of paragraphs.1-6, characterized in that the aperture stop is reached.

8. Anamorphic reader system papillary drawings according to any one of paragraphs.1-7, characterized in that when the Oia papillary drawings according to any one of paragraphs.1-8, characterized in that the control of the CCD performs computer.

 

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