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Optical fingerprint identification lens

A fingerprint identification and lens technology, applied in the field of lenses, can solve the problems of increased difficulty in lens assembly, increased production costs, and large optical errors, and achieve the effects of reduced production costs, reduced assembly difficulty, and small optical errors

Pending Publication Date: 2020-01-24
广东省星聚宇光学股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the existing optical fingerprint recognition lens, in addition to the multiple lenses arranged in the lens barrel, there are also optical filters, polarizers and glass sheets arranged in sequence, so that there are more components in the lens barrel, which increases the size of the lens. Difficulty in assembly makes the optical error generated by the lens larger during fingerprint recognition, and the production cost will also increase

Method used

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  • Optical fingerprint identification lens
  • Optical fingerprint identification lens
  • Optical fingerprint identification lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] see figure 1 with 2 As mentioned above, the present invention provides an optical fingerprint recognition lens 100 with a glue dispensing structure, including a lens housing 1, a lens assembly 2, and a filter polarizer assembly 3, the lens assembly 2 and the filter polarization assembly 3 are all arranged in the lens housing 1, the filter polarization assembly 3 is arranged on the image side of the lens assembly 2, and the filter polarization assembly 3 includes at least one filter 31 and at least one polarizer 32, so The filters 31 and the polarizers 32 are arranged alternately. The lens housing 1 plays a role of fixing the main structure, and the lens assembly 2 can allow the light reflected from the grooves and valleys of the fingerprint to pass through in the form of refraction, which is convenient for the lens to collect and identify fingerprints.

[0030] The lens assembly 2 includes a first lens 21, a first shading sheet 22, a second lens 23, a second shading s...

Embodiment 2

[0039] recombine Figure 4 As shown, the present invention provides an optical fingerprint identification lens 100 with a glue dispensing structure, including a lens housing 1, a lens assembly 2, a filter polarizer assembly 3 and a base 4, and the lens assembly 2 is arranged on the In the lens housing 1, the filter polarization assembly 3 is arranged on the image side of the lens assembly 2 and is located in the base 4, and the filter polarization assembly 3 includes at least one filter 31 and at least one polarizer 32 , the optical filters 31 and the polarizers 32 are arranged alternately, and the optical filters 31 can be used to fix the optical filter and polarization assembly 3 to the base 4 . The lens housing 1 plays a role of fixing the main structure, and the lens assembly 2 can allow the light reflected from the grooves and valleys of the fingerprint to pass through in the form of refraction, which is convenient for the lens to collect and identify fingerprints.

[00...

Embodiment 3

[0045] recombine Figure 5 As shown, the present invention provides an optical fingerprint recognition lens 100 with a dispensing structure, which differs from the optical fingerprint recognition lens 100 in Embodiment 2 in that the base 4 and the lens 1 housing All in one setting.

[0046] The beneficial effect of the present invention is that: the lens assembly and the filter polarization assembly can be fixed by dispensing glue, thereby reducing the number of lenses in the lens housing and reducing the difficulty of lens assembly. When the optical error is smaller, at the same time, the production cost will be reduced.

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Abstract

The invention provides an optical fingerprint identification lens. The lens comprises a lens shell and a lens assembly, the lens assembly is arranged in the lens shell, the lens also comprises a filtering polarization assembly arranged at the image side of the lens assembly, the filtering polarization assembly comprises at least one optical filter and at least one polaroid, and the optical filtersand the polaroids are alternately arranged. The fingerprint identification lens has the advantages that the lens assembly and the filtering polarization assembly can be fixed in a dispensing mode, the number of lenses in the lens shell is reduced, the assembling difficulty of the lens is reduced, optical errors generated by the lens in the fingerprint identification process are smaller, and meanwhile the production cost can be reduced.

Description

【Technical field】 [0001] The invention relates to the technical field of lenses, in particular to an optical fingerprint recognition lens. 【Background technique】 [0002] In the mobile phone fingerprint recognition lens, obtaining a good fingerprint image is a very complicated problem, because the fingerprint used for recognition is only a relatively small piece of skin, so the fingerprint collection device should have a good enough resolution to obtain the details of the fingerprint, Currently used fingerprint image collection equipment is basically based on three technical foundations: optical fingerprint collection technology, semiconductor silicon fingerprint collection technology and ultrasonic fingerprint collection technology. [0003] Among them, collecting fingerprints with the help of optical technology is the oldest and most widely used technology. It has been tested for a long time and can adapt to temperature variations to a certain extent. It can achieve a high...

Claims

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Application Information

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IPC IPC(8): G06K9/00G02B7/00
CPCG02B7/006G02B7/00G06V40/1324G06V40/1359
Inventor 王锋周明明马庆鸿万良伟
Owner 广东省星聚宇光学股份有限公司