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Optical lens and imaging equipment

An optical lens, imaging surface technology, applied in optics, optical components, instruments, etc., to achieve the effect of ensuring reliable quality

Active Publication Date: 2022-05-06
JIANGXI LIANCHUANG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing lenses on the market cannot meet the above requirements well. Therefore, it is urgent to develop an optical lens with large aperture, high resolution, and positive F-Theta distortion that can cooperate with UAV oblique photogrammetry technology.

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
Effect test

no. 1 example

[0130] figure 1 The schematic diagram of the structure of the optical lens provided in the first embodiment of the present invention, the optical lens includes in sequence from the object side to the imaging surface along the optical axis: the first lens L1, the second lens L2, the third lens L3, the diaphragm STO, the first lens Four lenses L4, fifth lens L5, sixth lens L6, and filter L7;

[0131] The first lens L1 has negative refractive power, its object side S1 is convex, and its image side S2 is concave;

[0132] The second lens L2 has a positive refractive power, and its object side S3 and image side S4 are both convex;

[0133] The third lens L3 has positive refractive power, its object side S5 is a convex surface, and its image side S6 is concave at the near optical axis;

[0134] The diaphragm STO is disposed between the third lens L3 and the fourth lens L4;

[0135] The fourth lens L4 has positive refractive power, and its object side S7 and image side S8 are both...

no. 2 example

[0150] Figure 4 It is a schematic diagram of the structure of the optical lens provided in the second embodiment of the present invention. The optical lens in this embodiment is roughly the same as the optical lens in the first embodiment, except that the curvature radius and thickness of each lens are different. ; It should be noted that the image side S6 of the third lens is convex at the near optical axis, and the relevant parameters of each lens are shown in Table 2-1.

[0151] The relevant parameters of each lens in the optical lens provided by the second embodiment of the present invention are shown in Table 2-1.

[0152] table 2-1

[0153]

[0154] The surface coefficients of each aspheric surface in the optical lens provided by the second embodiment of the present invention are shown in Table 2-2.

[0155] Table 2-2

[0156]

[0157] Please refer to Figure 6 , Figure 7 and Figure 8 , respectively show the field curvature curve, F-Theta distortion diagra...

no. 3 example

[0166] This embodiment provides an imaging device, including the imaging lens (such as the optical lens 100) and an imaging element in any of the above embodiments, the imaging element is arranged outside the imaging surface S15, and the imaging element combines the The optical image formed by the optical lens 100 is converted into an electrical signal.

[0167] Further, the imaging element may be a CMOS (Complementary Metal Oxide Semiconductor, Complementary Metal Oxide Semiconductor) image sensor, or a CCD (Charge Coupled Device, Charge Coupled Device) image sensor.

[0168] Further, the imaging device may be a tilting camera lens of an unmanned aerial vehicle or the like.

[0169] The imaging device provided in this embodiment includes an optical lens. Since the optical lens adopts a combination of a glass spherical surface and an aspheric surface, various aberrations of the imaging system are better corrected. Therefore, the imaging device provided in this embodiment has a...

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Abstract

The invention provides an optical lens and an imaging device, which belong to the field of optical imaging; the optical lens has a total of six lenses, which sequentially include: a first lens with negative focal power; the second lens with positive power; the third lens with positive power; the diaphragm; the fourth lens with positive power; the fifth lens with negative power; the sixth lens with positive power; the optical lens meets the conditions Formula: 3.2<TTL / CT2<3.5, 4.5<TTL / CT5<6, where CT2 represents the central thickness of the second lens, CT5 represents the central thickness of the fifth lens, and TTL represents the total optical length of the optical lens, which has The characteristics of large aperture, high resolution, and positive F-Theta distortion meet the needs of UAV oblique photogrammetry technology. An imaging device includes an optical lens and an imaging element that converts an optical image into an electrical signal.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to an optical lens and imaging equipment. Background technique [0002] Traditional aerial photography can only shoot ground objects from a vertical angle, while oblique photography collects images from different angles such as vertical and side view with multiple lenses on the same platform, which effectively makes up for the limitations of traditional aerial photography and can be quickly changed Shooting angle and composition break through the limitations of terrain and shooting angle, making aerial photography more flexible. [0003] UAV oblique photogrammetry technology is a high-tech developed in recent years. The three-dimensional data of oblique photography technology can truly reflect the appearance, position, height and other attributes of ground objects; with the help of UAV, image data can be quickly collected to achieve full Automated 3D modeling; oblique photo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B1/00G02B13/18
CPCG02B13/0005G02B13/0045G02B1/00
Inventor 张歆越王克民
Owner JIANGXI LIANCHUANG ELECTRONICS CO LTD
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