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Fingerprint identification optical lens

An optical lens and fingerprint recognition technology, applied in the field of optical lenses, can solve the problems of not being able to have a body and the fingerprint module occupying a large space, and achieve high-quality results

Pending Publication Date: 2021-12-10
辽宁中蓝光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current fingerprint recognition lens still has a large volume, so the fingerprint module also takes up a large space, so that the installation device cannot have a thinner body

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] For the design parameters of the fingerprint recognition optical lens in Embodiment 1, please refer to the following table for details.

[0049] Table 1 (a) shows the surface type, radius of curvature, thickness and material of each lens of the optical lens of Embodiment 1. Wherein, the units of the radius of curvature and the thickness are both millimeters (mm).

[0050] Table 1(a)

[0051]

[0052] Table 1(b) shows the surface aspheric coefficients of each lens of the optical lens of Example 1.

[0053] Table 1(b)

[0054] face number 3 4 5 6 8 9 K -1.11E+00 2.77E-01 -9.90E+01 1.07E+01 -9.45E+01 -3.30E+00 A4 1.04E+01 -5.97E+00 7.59E+01 1.43E+01 -1.09E+01 4.35E+01 A6 -7.39E+01 7.42E+02 -5.20E+03 -1.81E+03 7.48E+03 -8.54E+03 A8 3.62E+02 -1.71E+04 2.42E+05 1.37E+05 -1.62E+06 8.13E+05 A10 -1.19E+03 2.03E+05 -7.48E+06 -1.05E+07 1.89E+08 -4.63E+07 A12 2.61E+03 -1.30E+06 1.48E+08 6.65E+08 -1.26E+...

Embodiment 2

[0064] Figure 6 A schematic diagram of the optical arrangement of the fingerprint recognition optical lens according to Embodiment 2 of the present invention is shown. Such as Figure 6 As shown, the fingerprint recognition optical lens according to the exemplary embodiment of the present invention includes in sequence from the object side to the image side along the optical axis: a glass plate, a first lens, a second lens, a diaphragm, a third lens, and a filter and image surface.

[0065] For the design parameters of the fingerprint recognition optical lens in this embodiment, please refer to the following table for details.

[0066]Table 2 (a) shows the surface type, radius of curvature, thickness and material of each lens of the optical lens of embodiment 2. Wherein, the units of the radius of curvature and the thickness are both millimeters (mm).

[0067] Table 2(a)

[0068]

[0069] Table 2(b) shows the surface aspheric coefficients of each lens of the optical l...

Embodiment 3

[0081] Figure 10 A schematic diagram of the optical arrangement of the fingerprint identification optical lens according to Embodiment 3 of the present invention is shown. Such as Figure 10 As shown, the fingerprint recognition optical lens according to the exemplary embodiment of the present invention includes in sequence from the object side to the image side along the optical axis: a glass plate, a first lens, a second lens, a diaphragm, a third lens, and a filter and image surface.

[0082] For the design parameters of the fingerprint recognition optical lens in this embodiment, please refer to the following table for details.

[0083] Table 3 (a) shows the surface type, radius of curvature, thickness and material of each lens of the optical lens of embodiment 3. Wherein, the units of the radius of curvature and the thickness are both millimeters (mm).

[0084] Table 3(a)

[0085]

[0086]

[0087] Table 3(b) shows the surface aspheric coefficients of each len...

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Abstract

The invention relates to the technical field of optical lenses, and discloses a fingerprint identification optical lens. The optical lens is sequentially provided with a glass plate, a first lens, a second lens, a third lens and an optical filter from an object side to an image side along an optical axis, wherein a diaphragm is arranged between the second lens and the third lens; the first lens has negative focal power, and paraxial regions of the object side surface and the image side surface are concave surfaces; the second lens has positive focal power, a paraxial region of the object side surface is a convex surface, and a paraxial region of the image side surface is a concave surface; the third lens has positive focal power, and paraxial regions of the object side surface and the image side surface are convex surfaces; the optical lens satisfies the following conditions: 2.4 < OBH / TTL < 4; wherein TTL is the total length from the bottom of the cover plate to the image plane, and OBH is the object height of the fingerprint identification optical lens. The fingerprint identification optical lens provided by the invention has good optical performance and meets the design requirements of wide angle, large aperture and fingerprint identification.

Description

technical field [0001] The invention relates to the field of optical lenses, in particular to a fingerprint identification optical lens, which is suitable for smart devices such as smart phones. Background technique [0002] With the development trend of electronic products with good functions and thin, light and small appearance, miniaturized photographic lenses with good imaging quality have become the mainstream in the current market. However, the current fingerprint recognition lens still has a large volume, so the fingerprint module also takes up a large space, so that the installation device cannot have a thinner body. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a fingerprint recognition optical lens, which can greatly shorten the total length of the lens on the basis of a large object height. [0004] The fingerprint recognition optical lens of the present invention has small volume and good imag...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/18G03B11/00G03B30/00G06K9/00
CPCG02B13/0035G03B11/00G03B30/00
Inventor 葛杰宋亮陈军
Owner 辽宁中蓝光电科技有限公司