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Optical imaging lens and biological feature recognition device

An optical imaging lens and lens technology, applied in the imaging field, can solve problems such as difficulty in miniaturization, and achieve the effect of short sight distance and wide recognition range

Active Publication Date: 2021-07-16
GUANGDONG XUYE OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides an optical imaging lens and a biometric identification device, which solves the problem that the miniaturization of the lens with the biometric identification function in the prior art is difficult

Method used

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  • Optical imaging lens and biological feature recognition device
  • Optical imaging lens and biological feature recognition device
  • Optical imaging lens and biological feature recognition device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] see Figure 1 to Figure 3 , figure 1 A schematic diagram of an optical imaging lens according to Embodiment 1 of the present invention is shown, figure 2 From left to right are the astigmatism and distortion curves of an optical imaging lens according to Embodiment 1 of the present invention, image 3 It is a spherical aberration curve diagram of an optical imaging lens according to Embodiment 1 of the present invention.

[0080] An embodiment of the present invention provides an optical imaging lens, which includes in sequence from the object side to the image side: a first lens 110, a second lens 120, a diaphragm 101, and a third lens 130, and the object side of the first lens 110 to the third lens Each surface on the object side and the image side of 130 is aspherical.

[0081] Wherein, the first lens 110 has negative refractive power, and its object side and image side are both concave at the paraxial; the second lens 120 has positive refractive power, its objec...

Embodiment 2

[0095] see Figure 4 to Figure 6 , Figure 4 A schematic diagram of an optical imaging lens according to Embodiment 2 of the present invention is shown, Figure 5 From left to right is a graph of astigmatism and distortion curves of an optical imaging lens according to Embodiment 2 of the present invention, Figure 6 It is a spherical aberration curve diagram of an optical imaging lens according to Embodiment 2 of the present invention.

[0096] An embodiment of the present invention provides an optical imaging lens, which sequentially includes from the object side to the image side: a first lens 210, a second lens 220, a diaphragm 201 and a third lens 230, the object side of the first lens 210 to the third lens Each surface on the object side and the image side of 230 is aspherical.

[0097] Wherein, the first lens 210 has negative refractive power, and its object side and image side are both concave at the paraxial; the second lens 220 has positive refractive power, its o...

Embodiment 3

[0111] see Figure 7 to Figure 9 , Figure 7 It shows a schematic diagram of an optical imaging lens according to Embodiment 3 of the present invention, Figure 8 From left to right is the astigmatism and distortion curve diagram of an optical imaging lens according to Embodiment 3 of the present invention, Figure 9 It is a spherical aberration curve diagram of an optical imaging lens according to Embodiment 3 of the present invention.

[0112] An embodiment of the present invention provides an optical imaging lens, which sequentially includes from the object side to the image side: a first lens 310, a second lens 320, a diaphragm 301 and a third lens 330, the object side of the first lens 310 to the third lens Each surface on the object side and the image side of 330 is aspherical.

[0113] Wherein, the first lens 310 has negative refractive power, and its object side and image side are both concave at the paraxial; the second lens 320 has positive refractive power, its o...

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Abstract

The invention discloses an optical imaging lens and a biological feature recognition device, and the optical imaging lens sequentially comprises, from an object side to an image side,afirst lens element with negative refractive power and having an object-side surface and an image-side surface being concave in a paraxial region. a second lens element with positive refractive power and having an object-side surface being convex in a paraxial region and an image-side surface being concave in a paraxial region; and a third lens element with positive refractive power, wherein both of the object-side and image-side surfaces thereof being convex in paraxial regions. The refractive index of the first lens element and the refractive index of the third lens element are smaller than 1.6, and the optical imaging lens meets the following relational expression: 4.0<Fno / EPD, wherein Fno represents the aperture value of the optical imaging lens, and EPD represents the entrance pupil diameter of the optical imaging lens. The invention provides an optical imaging lens and a biological feature recognition device, which can achieve the effects of short sight distance and wide recognition range while realizing the miniaturization of the lens, thereby ensuring the stable and accurate recognition of biological features in a large range.

Description

technical field [0001] The invention relates to the field of imaging technology, in particular to an optical imaging lens and a biometric identification device. Background technique [0002] At present, biometric identification functions are widely used in various devices, whether it is mobile phones, computers and other electronic devices or access control systems, biometric identification has become an important configuration, and fingerprint identification is favored by consumers in the market. [0003] At present, the mainstream fingerprint recognition technologies include optical technology, silicon technology and ultrasonic technology, etc. Among them, the use of optical technology for fingerprint recognition is the oldest and most widely used technology. With the miniaturization and thinning of various devices, the lenses with biometric functions are gradually miniaturized; however, the existing micro-optical imaging lenses generally have a small field of view and a l...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/18G06K9/00
CPCG02B13/0035G02B13/18G06V40/1324
Inventor 林肖怡张龙杨剑锋刘涵
Owner GUANGDONG XUYE OPTOELECTRONICS TECH