Image capturing lens, recognition module and electronic device

A lens and lens technology, applied in optical components, optics, instruments, etc., can solve the problem of increasing the field of view of the lens

Pending Publication Date: 2020-09-22
JIANGXI JINGCHAO OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide an imaging lens, a recognition module and an electronic device for the problem of how to increase the field of view of the lens.

Method used

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  • Image capturing lens, recognition module and electronic device
  • Image capturing lens, recognition module and electronic device
  • Image capturing lens, recognition module and electronic device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0095] Such as figure 1 In the shown first embodiment, the image taking lens 10 sequentially includes a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, a stop ST0, and a lens with positive refractive power from the object side to the image side. The third lens L3 and the infrared bandpass filter 110 . in addition, figure 2 It is the spherical aberration diagram (mm), the astigmatism diagram (mm) and the distortion diagram (%) of the imaging lens 10 in the first embodiment, wherein the astigmatism diagram and the distortion diagram are reference wavelengths (see notes in Table 1) The data graph below.

[0096] Wherein, the object side S1 of the first lens L1 is concave at the optical axis, the image side S2 of the first lens L1 is concave at the optical axis; the object side S1 of the first lens L1 is convex at the circumference, and the first lens L1 The image side S2 is concave at the circumference. The object side S3 of the...

no. 2 example

[0131] Such as image 3 In the shown second embodiment, the image taking lens 10 sequentially includes a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, a stop ST0, and a lens with positive refractive power from the object side to the image side. The third lens L3 and the infrared bandpass filter 110 . in addition, Figure 4 It is the spherical aberration diagram (mm), the astigmatism diagram (mm) and the distortion diagram (%) of the imaging lens 10 in the second embodiment, wherein the astigmatism diagram and the distortion diagram are data diagrams at the reference wavelength.

[0132] Wherein, the object side S1 of the first lens L1 is concave at the optical axis, the image side S2 of the first lens L1 is concave at the optical axis; the object side S1 of the first lens L1 is convex at the circumference, and the first lens L1 The image side S2 is concave at the circumference. The object side S3 of the second lens L2 is a co...

no. 3 example

[0144] Such as Figure 5 In the third embodiment shown, the imaging lens 10 sequentially includes a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, a stop ST0, and a lens with positive refractive power from the object side to the image side. The third lens L3 and the infrared bandpass filter 110 . in addition, Figure 6 It is the spherical aberration diagram (mm), the astigmatism diagram (mm) and the distortion diagram (%) of the imaging lens 10 in the third embodiment, wherein the astigmatism diagram and the distortion diagram are data diagrams at the reference wavelength.

[0145] Wherein, the object side S1 of the first lens L1 is concave at the optical axis, the image side S2 of the first lens L1 is concave at the optical axis; the object side S1 of the first lens L1 is convex at the circumference, and the first lens L1 The image side S2 is concave at the circumference. The object side S3 of the second lens L2 is a convex s...

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Abstract

The invention relates to an image capturing lens comprising, in order from an object side to an image side: a first lens element with negative refractive power; a second lens element with positive refractive power; a third lens element with positive refractive power; the image capturing lens satisfies the following relational expressions: SD11/sin (ANG12) is greater than 2.50 mm and less than 5.20mm, wherein SD11 is the height of the maximum effective diameter of the object side surface of the first lens relative to the optical axis, and ANG12 is the included angle between the tangent line ofthe curved surface of the image side surface of the first lens at the maximum effective diameter and the vertical line of the optical axis. When the relationship is satisfied, the effective semi-aperture of the object side surface of the first lens can be reasonably controlled to effectively enlarge the field angle of the image capturing lens; and meanwhile, the included angle between the curvedtangent line and the tangent point vertical line of the image side surface of the first lens at the maximum effective diameter can be controlled, so that the surface type of the image side surface ofthe first lens is not bent excessively, the forming yield of the first lens is improved, and the manufacturing difficulty and cost are reduced.

Description

technical field [0001] The invention relates to the field of optical imaging, in particular to an imaging lens, an identification module and an electronic device. Background technique [0002] With the rapid development of TOF (Time of Flight) technology and the mass production of photosensitive elements supporting TOF technology, the application fields supporting TOF technology will be very wide, such as face unlocking on mobile phones and automatic driving of cars. , man-machine interface, games, industrial machine vision, measurement, etc. [0003] The TOF technology includes a matching emitting structure capable of emitting modulated light and a receiving structure capable of receiving modulated light. However, the general receiving structure has the problem that the complete information of the measured object cannot be obtained due to the small viewing angle. Contents of the invention [0004] Based on this, it is necessary to provide an imaging lens, a recognition ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/06G02B13/18
CPCG02B13/0035G02B13/06
Inventor 邹海荣刘彬彬邹金华
Owner JIANGXI JINGCHAO OPTICAL CO LTD
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