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Iris alignment and acquisition device

A collection device and iris collection technology, which is applied in the directions of instruments, character and pattern recognition, computer parts, etc., can solve the problems of complex structure of the device, and achieve the effect of more lighting, simple structure and convenient use.

Active Publication Date: 2014-01-22
山东艾瑞视智能科技有限公司
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Problems solved by technology

For example, the Chinese invention patent CN200610113410.2 discloses a method of collecting multiple iris images by using multiple fixed-focus acquisition lenses with different focal lengths, and then using a ranging module or an image evaluation method to select a clear iris image, which has the advantage of expanding the depth of field , the disadvantage is that it is necessary to use a spectroscope to split light, install multiple collection lenses in different directions, and the device structure is complicated

Method used

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  • Iris alignment and acquisition device

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0016] The iris alignment and collection device includes a plano-convex mirror 1 with iris alignment function, a light source 2 for illuminating the iris, a fixed-focus lens group 3, and an image sensor 4; the central axis of the plano-convex mirror 1 and the fixed-focus lens group 3. The central axis of the image sensor 4 is on the same straight line; the light source 2 is arranged around the plano-convex mirror 1 to converge the light to the iris collection position.

[0017] figure 1 , 2 They are respectively the front view and the side view of the plano-convex mirror 1 in the present invention. Such as figure 1 , 2 As shown, the middle part 101 of the plane area of ​​the plano-convex mirror 1 and the entire surface of the convex surface 102 are coated with a multi-layer dielectric film, which can transmit infrared light and reflect visi...

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Abstract

The invention provides an iris alignment and acquisition device which comprises a plano-convex mirror, a light source and an iris acquisition part, wherein the plano-convex mirror and the iris acquisition part are located on the same central axis; the light source is arranged at the periphery of the plano-convex mirror; and light rays are converged to an iris acquisition position. According to the iris alignment and acquisition device, the plano-convex mirror is introduced for iris alignment, and prime lenses are adopted for iris acquisition, so that the iris alignment and acquisition device is low in cost, simple in structure, small, exquisite and light.

Description

technical field [0001] The invention relates to an optical imaging device, in particular to an iris alignment and collection device. Background technique [0002] Iris recognition technology is a biometric recognition technology that has higher accuracy and stability than fingerprint recognition and face recognition. The steps of iris recognition generally include steps such as iris image acquisition, image preprocessing, iris positioning, liveness detection, feature extraction and feature matching. Among them, iris image acquisition is an important link, which greatly affects the recognition rate. [0003] Iris recognition needs to collect clear iris images. Currently existing iris collection devices are divided into variable focal length collection devices and fixed focal length collection devices. The variable focal length acquisition device usually has a zoom optical system, which cooperates with the motor to change the focal length. The device judges whether it has ...

Claims

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Application Information

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IPC IPC(8): G06K9/00
Inventor 曾爱军刘蕾刘东黄惠杰
Owner 山东艾瑞视智能科技有限公司
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