Optical lens and imaging equipment

A technology of optical lens and imaging surface, applied in optics, optical components, instruments, etc., to achieve high-quality resolution capabilities, meet imaging requirements, and achieve good imaging requirements

Active Publication Date: 2020-12-22
JIANGXI LIANYI OPTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing optical lenses applied to smart terminal devices cannot meet these requirements at the same time

Method used

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  • Optical lens and imaging equipment
  • Optical lens and imaging equipment
  • Optical lens and imaging equipment

Examples

Experimental program
Comparison scheme
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no. 1 example

[0072] see figure 1 , which is a schematic structural view of the optical lens 100 provided by the first embodiment of the present invention, the optical lens 100 includes in sequence from the object side to the imaging surface along the optical axis: a first lens L1, a stop ST, a second lens L2, a second lens Three lenses L3, a fourth lens L4 and an infrared filter G1.

[0073] The first lens L1 has positive refractive power, the object side S1 of the first lens L1 is a convex surface, and the image side S2 of the first lens L1 is a convex surface;

[0074] The second lens L2 has a positive refractive power, the object side S3 of the second lens L2 is a concave surface, and the image side S4 of the second lens L2 is a convex surface;

[0075] The third lens L3 has negative refractive power, the object side S5 of the third lens L3 is a convex surface, the image side S6 of the third lens L3 is a concave surface at the near optical axis, and the image side S6 of the third lens ...

no. 2 example

[0090] see Figure 5 , which is a schematic structural view of the optical lens 200 provided in the second embodiment of the present invention, the structure of the optical lens 200 in this embodiment is roughly the same as that of the optical lens 100 in the first embodiment, the difference lies in: this embodiment The material of the optical lens 200 is different from that of the optical lens 100, and the curvature radius of each lens is different.

[0091] The relevant parameters of each eyeglass in the optical lens 200 provided by this embodiment are shown in Table 3. In this embodiment, the vertical distance from the inflection point to the optical axis on the image side S6 of the third lens of the optical lens 200 is 1.865 mm, the sagittal height of the inflection point relative to the image side center of the third lens is 0.566mm; the vertical distance from the inflection point on the object side S7 of the fourth lens to the optical axis is 1.595mm, and the inflection ...

no. 3 example

[0099] see Figure 9 , which is a schematic structural view of the optical lens 300 provided in the third embodiment of the present invention, the structure of the optical lens 300 in this embodiment is roughly the same as that of the optical lens 100 in the first embodiment, the difference lies in: this embodiment The image side S2 of the first lens of the optical lens 300 is concave, and the material of each lens is different from that of the optical lens 100, and the radius of curvature of each lens is different.

[0100] The relevant parameters of each eyeglass in the optical lens 300 provided by this embodiment are shown in Table 5. In this embodiment, the vertical distance from the inflection point to the optical axis on the image side S6 of the third lens of the optical lens 300 is 1.695 mm, the sagittal height of the inflection point relative to the center of the image side of the third lens is 0.381mm; the vertical distance from the inflection point on the image side ...

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Abstract

The invention discloses an optical lens and imaging equipment. The optical lens sequentially comprises a first lens, a diaphragm, a second lens, a third lens, a fourth lens and an optical filter froman object side to an imaging surface along an optical axis, wherein the first lens has positive focal power, the object side surface of the first lens is a convex surface near the optical axis, the image side surface of the first lens is a concave surface or convex surface, the second lens has positive focal power, the object side surface of the second lens is a concave surface, the image side surface is a convex surface, the third lens has negative focal power, the object side surface of the third lens is a convex surface near the optical axis, the image side surface of the third lens is a concave surface near the optical axis, the image side surface of the third lens has at least one inflection point, the fourth lens has positive focal power, the object side surface of the fourth lens isa convex surface near the optical axis, the image side surface of the fourth lens is a concave surface near the optical axis, the image side surface of the fourth lens has at least one inflection point, and the four lenses are all plastic aspheric lenses. The optical lens provided by the invention has the characteristics of wide viewing angle, large aperture, small distortion and high-quality imaging, and is more suitable for the use requirements of the DToF technology.

Description

technical field [0001] The invention relates to the technical field of lens imaging, in particular to an optical lens and an imaging device. Background technique [0002] In recent years, 3D depth recognition technology has developed rapidly. At the same time, ToF (Time of Flight, flight distance measurement) stereo depth-sensing lenses with 3D space perception capabilities have opened up a new future of depth information and are popular on smart terminals. wide attention and application. ToF technology can be divided into DToF technology and IToF technology according to the principle of ranging. DToF technology (direct Time-of-Flight) is a direct measurement of flight time. Compared with IToF technology, DToF technology has higher accuracy, shorter ranging time, and anti-interference. The advantage of strong ability, the calibration is relatively simple. [0003] With the application of DToF technology on smart terminal devices, the application of DToF lenses in face reco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/18G02B13/06G02B13/14G02B1/04
CPCG02B1/041G02B13/06G02B13/14G02B13/18
Inventor 曾昊杰于笑枝刘绪明曾吉勇
Owner JIANGXI LIANYI OPTICS CO LTD
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