WO2015032270A1

WO2015032270A1 - Iris collection device

Info

Publication number: WO2015032270A1
Application number: PCT/CN2014/084428
Authority: WO
Inventors: 季佳平; 彭程; 马淑媛
Original assignee: 北京天诚盛业科技有限公司
Priority date: 2013-09-04
Filing date: 2014-08-14
Publication date: 2015-03-12
Also published as: CN103413126A; CN103413126B

Abstract

An iris collection device. The iris collection device comprises: a concave mirror (B), a reflection surface thereof facing a target iris (A); a camera lens (D) which is arranged at the back of the concave mirror (B), and is used for collecting iris information about the target iris (A) located in a collection region; and an imaging sensor (E) which is used for imaging infrared light transmitted by the camera lens (D) and indicating the iris information. The above-mentioned device solves the problems of long time and high costs when iris images are collected in the prior art, thus achieving the effects of shortening the adjustment time required for locating human eyes, accurately locating the positions of human eyes, and reducing the costs of the iris collection device.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of image acquisition, and in particular to an iris collection device. BACKGROUND OF THE INVENTION Iris image acquisition needs to first align the human eye to be recognized with the camera, adjust the position of the human eye, and enter the collection area to collect higher quality and clear pictures. In order to adjust the position of the human eye, the front of the general camera The plane mirror feedback device for human eye positioning is placed. Although the position of the human eye is intuitive by using the plane mirror, it is difficult for the user to find the effective area of the image acquisition when the distance of the eye is far from the lens through the plane mirror, and the eye position adjustment time is long. Users need to adapt to the equipment as much as possible, and the user experience is poor. In order to shorten the adjustment time, the current solution is to physically locate the user distance, or the structure is complicated and the cost is high. In view of the problem that the iris image acquisition time is high and the cost is high in the related art, an effective solution has not been proposed yet. SUMMARY OF THE INVENTION A main object of the embodiments of the present invention is to provide an iris collection device to solve the problem of high time and long cost of iris image acquisition in the prior art. According to an embodiment of the present invention, an iris collection device is provided, including: a concave mirror, the reflective surface facing the target iris; and a camera lens disposed behind the mirror of the concave mirror for collecting iris information of the target iris in the collection area; And an imaging sensor for imaging the infrared light representing the iris information transmitted through the camera lens. The embodiment of the invention adopts the iris collecting device of the following structure: a concave mirror with a reflecting surface facing the target iris; a camera lens disposed behind the mirror of the concave mirror for collecting iris information of the target iris in the collecting area; and an imaging sensor, It is used to image infrared light representing iris information transmitted through the camera lens. By providing a concave mirror in front of the camera lens, once the target iris is in the collection area, an enlarged iris image can be formed by the concave mirror, so that the user can quickly and accurately perform human eye positioning, and then collect iris information through the camera lens, and pass the imaging sensor. By performing imaging, since the magnified iris image formed by the concave mirror can quickly and accurately perform human eye positioning, and the cost of the concave mirror is low, the iris pattern in the prior art is solved. Such as the long acquisition time and high cost, the effect of shortening the adjustment time required for human eye positioning, accurately locating the position of the human eye and reducing the cost of the iris collection device are achieved. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in FIG. BRIEF DESCRIPTION OF THE DRAWINGS In the drawings: FIG. 1 is a schematic view of an iris collection apparatus according to an embodiment of the present invention; FIG. 2 is an imaging schematic diagram of a concave mirror of an iris collection apparatus according to an embodiment of the present invention; FIG. 4a is a schematic diagram of positioning of a human eye preliminary positioning by using the iris collecting device of FIG. 3; FIG. 4b is a schematic diagram of positioning of a human eye by using the iris collecting device of FIG. 3; FIG. 5a and FIG. Two schematic views of an outer casing in an iris collecting apparatus according to a first embodiment of the present invention; and Fig. 6 is a schematic view of an iris collecting apparatus according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. An embodiment of the present invention provides an iris collection device. The iris collection device provided by the embodiment of the present invention is specifically described. FIG. 1 is a schematic diagram of an iris collection device according to an embodiment of the present invention. The iris collecting device of the example mainly comprises a concave mirror B, a camera lens D and an imaging sensor E, wherein: the reflecting surface of the concave mirror B faces the target iris A, and the concave mirror B may be circular or elliptical, when the user needs When the human eye information is collected by the iris collecting device, the human eye positioning can be performed by the imaging principle of the concave mirror B. The imaging principle of the concave mirror B is shown in FIG. 2, as shown in FIG. 2, when the object 10 is away from the concave mirror B. When the object distance S is smaller than the focal length F of the concave mirror B, the erected magnified virtual image 20 of the object 10 is obtained by the concave mirror B, so that the user can adjust the eye position according to the erect magnified virtual image formed by the eye on the concave mirror B. For fast and correct eye positioning. The camera lens D is disposed behind the mirror of the concave mirror B for collecting iris information of the target iris in the collection area. Specifically, after the user correctly positions the eye through the concave mirror B, the eye enters the collection area accordingly. The camera lens D can collect iris information. The imaging sensor E is for imaging the infrared light representing the iris information transmitted through the camera lens D. In FIG. 1, L represents the distance between the target iris A and the optical center of the concave mirror B, and d represents the optical center of the concave mirror B. The distance between the optical centers of the camera lens D. The principle of information acquisition by the above iris collecting device is as follows: When L < concave mirror B has a focal length f, and L+d is within a range of object distances in which the camera lens D can be clearly imaged, it indicates that the target iris is in the collection area, that is, ul < When L+d < u2, a clear human eye image can be acquired, where ul and u2 represent the object distance range in which the camera lens D can be clearly imaged, ul is the minimum distance, and u2 is the maximum distance. In the iris collecting device of the embodiment of the invention, by providing a concave mirror in front of the camera lens, once the target iris is in the collection area, the enlarged iris image can be formed by the concave mirror, so that the user can quickly and accurately perform the human eye positioning, and then pass the camera. The lens collects the iris information and performs imaging by the imaging sensor. Since the magnified iris image formed by the concave mirror can quickly and accurately perform human eye positioning, and the cost of the concave mirror is low, the iris image in the prior art is solved. The problem of long acquisition time and high cost achieves the effect of shortening the adjustment time required for human eye positioning, accurately locating the position of the human eye, and reducing the cost of the iris collection device. 3 is a schematic view of an iris collection device according to a first preferred embodiment of the present invention. As shown in FIG. 3, the iris collection device of the preferred embodiment may further include a plane mirror H, which may be a common one having a through hole in the middle. The plane mirror may also be a transflective mirror. For a plane mirror H having a through-hole structure, the shape of the through hole is the same as that of the concave mirror B, and the concave mirror B is disposed in the through hole of the plane mirror H and is in close contact with each other. The plane mirror H, that is, the two are matched, the corresponding concave mirror B is circular, the through hole of the plane mirror H is a circular hole, the corresponding concave mirror B is elliptical, and the through hole of the plane mirror H is an elliptical hole. For the transflective plane mirror H, the area of the reflecting surface of the plane mirror H is larger than the area of the reflecting surface of the concave mirror B, and the concave mirror B is disposed on the reflecting surface of the plane mirror H. In the embodiment of the present invention, the size of the plane mirror H and the concave mirror B may be set to satisfy the following relationship: R1 : R2 = 1.25: 1, where R1 is the radius of the plane mirror H, R2 is the radius of the concave mirror B, or R1 is a plane mirror The long axis length of H, R2 is the long axis length of the concave mirror B. Although the concave mirror can solve the distance problem, when the human eye deviates from the optical axis of the concave mirror, the human eye cannot be imaged in the concave mirror. The user does not know how to adjust the position of the upper, lower, left and right of the eye, and it is difficult to find the shooting position. In order to solve this problem, in the first preferred embodiment, the plane mirror is combined with the concave mirror, and the transflective plane mirror and the concave mirror are selected. The plane mirror is used for rough positioning of the human eye and the eye, and the positioning effect is as shown in FIG. 4a. In the figure, S _H represents the plane mirror area, S _B represents the concave mirror area, and the concave mirror is used for accurate positioning of iris imaging, and the positioning effect As shown in Fig. 4b, the user's eyes can be quickly and accurately positioned and images can be captured, which further shortens the adjustment time required for human eye positioning. Preferably, the iris collecting device of the embodiment of the present invention further includes a housing disposed on the reflecting surface of the plane mirror H. FIG. 5a and FIG. 5b schematically show the structure of the housing in the two embodiments of the present invention: FIG. 5a As shown, the outer casing has a honeycomb hole, δΡ, and the outer casing is a honeycomb casing, which makes the position of the human eye more intuitive. The arrangement of the honeycomb eye can be designed according to the size of the plane ring, but the round hole is large enough and dense and dense. 5a schematically shows a honeycomb casing provided by an embodiment of the present invention: four sufficiently large circular holes are arranged in four places of the upper, lower, left and right sides of the plane ring. As shown in FIG. 5b, the outer casing has a grid mark on the surface of the target iris. Specifically, the network identifier may be a silk screen dark grid, which is used to display the outline of the human eye, and find an easy-aligned scale for the human eye image. The effect of the grid on the human eye is small, which can increase the user's comfort. The size of the divided dark grid can be designed according to your needs. By providing the above-mentioned outer casing having the above structure, it is convenient for the user to find a suitable reference object to quickly and accurately adjust the position of the human eye when performing human eye positioning, and the purpose of shortening the adjustment time required for human eye positioning is also achieved. Preferably, the iris collecting device of the embodiment of the present invention further includes an infrared light source G, the light emitting side of the infrared light source G is directed toward the target iris, and the infrared light source G is an infrared fill light for generating infrared light, and the light emitting point of the infrared light source G The first angle Θ satisfies: 5 ° < Θ <10°, wherein the first angle Θ is between the infrared light source G and the target iris to further ensure the fill light effect. The acute angle of the line relative to the horizontal plane. In the embodiment of the present invention, the infrared light source G may be a fill light capable of generating a wavelength of 850 nm, and the infrared light source G may be disposed on the lower side, the left side or the right side of the plane mirror. Specifically, for the case of the housing shown in Fig. 5a, an infrared light source G can be placed at the honeycomb eye of the housing, and for the case of the housing shown in Fig. 5b, the infrared light source G can be placed at an appropriate position under the plane mirror. By setting the infrared light source G satisfying 5 ° < Θ <10°, the purpose of avoiding the reflection of the human eye by the glasses or the sunglasses and the spot noise is achieved, thereby improving the accuracy of the subsequent iris information collection. Preferably, the iris collection device of the embodiment of the present invention further includes an indicator light F for displaying the first color when the target iris is in the collection area, and when the target iris is not in the collection area. Next, the second color is displayed, wherein the first color and the second color are different colors. In the embodiment of the present invention, the first color may be green, and the second color may be red. The indicator light F can be set toward the target iris, and the different colors indicate different states of the human eye's position alignment. For example, the red light is on, indicating that the human eye does not enter the shooting area. The green light is on, indicating that the complete and clear human eye is detected, that is, the position is appropriate, and it can be collected to visually prompt the user whether the acquisition can be performed. More preferably, the iris collection device of the embodiment of the present invention further includes a first filter C1 disposed on the reflective surface of the concave mirror B for filtering visible light, transmitting infrared light, δΡ, In the first preferred embodiment of the present invention, the first filter C1 serves as a filter for filtering visible light and transmitting infrared light, wherein the imaging sensor E is disposed on the light exiting side of the camera lens D, and the center of the imaging sensor E, The optical center of the concave mirror B and the optical center of the convex lens D are located on the same straight line. By setting the first filter C1 to filter visible light, the interference of visible light in the iris imaging process is avoided, and the accuracy of iris information imaging is improved. Figure 6 is a schematic view of an iris collecting device according to a second preferred embodiment of the present invention, as shown in Figure 6, the iris collecting device of the second preferred embodiment and the iris collecting device of the first preferred embodiment shown in Figure 3 In contrast, the difference between the two is that, in the iris collecting device of the second preferred embodiment of the present invention, the second filter C2 is disposed, and the second filter C2 is disposed on the light emitting side of the camera lens D for reflecting infrared. Light, δΡ, In the second preferred embodiment of the present invention, the second filter C2 serves as a beam splitter for separating visible light and infrared light, reflecting infrared light, and the imaging sensor E is for reflecting the infrared light of the filter C2. The light is imaged, and the optical center of the concave mirror B and the optical center of the convex lens D are located on the same straight line. The iris collecting device of the second preferred embodiment can also achieve preliminary positioning by using a plane mirror to quickly determine whether the human eye is in the shooting area, and assist the concave mirror imaging to make the human eye positioning more rapid and accurate. From the above description, it can be seen that the present invention achieves fast and accurate positioning of the human eye, shortens the adjustment time required for human eye positioning, and improves the accuracy of positioning the position of the human eye. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

An iris collection device comprising:

Concave mirror (B), the reflecting surface faces the target iris;

a camera lens (D) disposed behind the mirror of the concave mirror (B) for collecting iris information of the target iris in the collection area;

An imaging sensor (E) for imaging infrared light representing the iris information transmitted through the camera lens (D).

2. The iris collecting device according to claim 1, wherein the concave mirror (B) is circular or elliptical, and the iris collecting device further comprises:

a plane mirror (H) having a through hole having a shape identical to that of the concave mirror (B), wherein the concave mirror (B) is disposed in the through hole and is in close contact with the plane mirror (H).

The iris collecting device according to claim 1, wherein the concave mirror (B) is circular or elliptical, and the iris collecting device further comprises:

a plane mirror (H), the plane mirror (H) is a transflective mirror, and an area of the plane mirror (H) reflecting surface is larger than an area of the reflecting surface of the concave mirror (B),

Wherein, the concave mirror (B) is disposed on a reflecting surface of the plane mirror (H).

The iris collecting device according to claim 2 or 3, wherein the iris collecting device further comprises: a casing disposed on a reflecting surface of the plane mirror (H), the casing having a honeycomb hole, or the The outer casing has a grid marking on the surface of the target iris.

The iris collecting device according to claim 2 or 3, wherein R1 : R2 = 1.25: 1 , wherein R1 is a radius of the plane mirror (H), and R2 is a radius of the concave mirror (B), Or R1 is the long axis length of the plane mirror (H), and R2 is the long axis length of the concave mirror (B).

The iris collection device according to claim 1, wherein the iris collection device further comprises:

a first filter (Cl) is disposed on the reflective surface of the concave mirror (B) for transmitting the infrared light, Wherein the imaging sensor (E) is disposed on a light exiting side of the camera lens (D), and a center of the imaging sensor (E), an optical center of the concave mirror (B), and the camera lens (D) The optical centers of the ) are on the same line. The iris collection device according to claim 1, wherein the iris collection device further comprises:

a second filter (C2) disposed on a light exiting side of the camera lens (D) for reflecting the infrared light,

Wherein the imaging sensor (E) is configured to image infrared light reflected by the second filter (C2), the optical center of the concave mirror (B) and the optical center of the camera lens (D) Located on the same line. The iris collection device according to claim 1, wherein the iris collection device further comprises:

The infrared light source (G), the light exiting side faces the target iris. The iris collecting device according to claim 8, wherein the first angle Θ satisfies: 5° < θ < 10°, wherein the first angle Θ is between the infrared light source (G) and the target iris The acute angle of the line relative to the horizontal plane. The iris collection device according to claim 1, wherein the iris collection device further comprises:

An indicator light (F), configured to display a first color when the target iris is in the collection area, and display a second color if the target iris is not in the collection area, Wherein the first color and the second color are different colors.