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Face recognition lens group

A technology of face recognition and lens group, which is applied in the field of face recognition lens group, can solve the problems that high definition cannot meet the requirements of large aperture and small distortion, and realize the miniaturization of resolution and structure volume, large image area, high Effects of resolution and structural volume miniaturization

Inactive Publication Date: 2021-11-12
SUZHOU MAGU OPTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing face recognition lenses cannot meet the requirements of large aperture and small distortion while maintaining miniaturization and high definition

Method used

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  • Face recognition lens group
  • Face recognition lens group
  • Face recognition lens group

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Embodiment Construction

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The specific implementations described here are only used to explain the present invention, not to limit the invention. For ease of description, only relevant parts of the present invention are shown in the drawings but not all structures.

[0019] figure 1 A schematic structural diagram of a face recognition lens group provided by the implementation of the present invention, refer to figure 1 , the face recognition lens group includes a lens barrel 4 and a first lens group 1, a diaphragm 2, and a second lens group 3 arranged in sequence from the object side to the image side along the optical axis. The first lens group 1 includes The first lens 11 is arranged in sequence from the object side to the image side, and the second lens group 3 includes a second lens 31, a third lens 32, and a fourth lens 33 arranged in sequence along the o...

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Abstract

The face recognition lens group comprises a lens barrel, a first lens group, a diaphragm and a second lens group; the first lens group comprises first lenses which are arranged in sequence, and the second lens group comprises a second lens, a third lens and a fourth lens which are arranged in sequence; and the diaphragm is located between the first lens and the second lens. The first lens is convex-concave, the second lens is concave-convex, the third lens is concave-convex, and the fourth lens is convex-concave. The focal length range of the first lens group is 3-5mm, and the focal length range of the second lens group is 2-4.5 mm. According to the invention, the problem that the existing face recognition cannot meet white light and infrared working environments at the same time is solved, the visible light wave band is 400-680 nm, the infrared wave band is 780-940 nm, the structure is small, the light transmission is good, and the cost is low.

Description

technical field [0001] The invention relates to optical imaging technology, in particular to a face recognition lens set. Background technique [0002] With the increasing application of face recognition systems, especially in public places, such as parks, hospitals, schools, factories and other public activities and gathering places, there are more and more layouts of face recognition systems. [0003] The key structure in the face recognition system is the optical lens, which images the real scene on the image sensor through the optical lens, so that the image sensor performs photoelectric conversion to form an electronic image; and then through the processing and analysis of the electronic image, the face in the image is recognized . Obviously, face recognition has higher requirements on optical lenses and needs to present clear images. Moreover, with the continuous advancement of face recognition technology, the requirements for face recognition lenses are also getting...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/18G06K9/00
CPCG02B13/004G02B13/18
Inventor 赵彬强
Owner SUZHOU MAGU OPTICS CO LTD