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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: 2022-05-24
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

[0122] see figure 1 , which is a schematic structural diagram of the optical lens provided by the first embodiment of the present invention. The optical lens 100 sequentially includes from the object side to the imaging surface along the optical axis: a first lens L1, a second lens L2, a third lens L3, a light A stop STO, the fourth lens L4, the fifth lens L5, the sixth lens L6, the filter L7 and the imaging surface S13;

[0123] The first lens L1 has negative refractive power, the object side S1 is convex, and the image side S2 is concave;

[0124] The second lens L2 has negative refractive power, the object side S3 is convex, and the image side is concave;

[0125] The third lens L3 has positive refractive power, and its object side and the image side S5 are both convex surfaces. The second lens L2 and the third lens L3 form a first cemented lens group, that is, the image side of the second lens and the object of the third lens. The glued surface on the side is S4;

[012...

no. 2 example

[0142] Figure 5 This 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. The difference is that the curvature radius and thickness of each lens are different. , and the specific parameters of each lens are shown in Table 2-1.

[0143] 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.

[0144] table 2-1

[0145]

[0146] The surface shape coefficients of each aspherical surface in the optical lens provided by the second embodiment of the present invention are shown in Table 2-2.

[0147] Table 2-2

[0148]

[0149] Please refer to Image 6 , Figure 7 and Figure 8 , which show the field curvature graph, the F-Theta distortion graph, and the MTF graph of the optical lens in this embodiment, respectively.

[01...

no. 3 example

[0158] This embodiment provides an imaging device, including the optical lens in any of the above embodiments and an imaging element, the imaging element is disposed outside the imaging surface S13, and the imaging element converts an optical image formed by the optical lens converted to electrical signals.

[0159] Further, the imaging element may be a CMOS (Complementary Metal Oxide Semiconductor) image sensor, or a CCD (Charge Coupled Device, charge coupled device) image sensor.

[0160] Further, the imaging device may be a drone tilt camera lens or the like.

[0161] The imaging device provided in this embodiment includes an optical lens. Since the optical lens adopts a combination of glass spherical surface and aspheric surface, various aberrations of the imaging system are better corrected, so the imaging device provided in this embodiment has a large aperture, Features such as high resolution and positive F-Theta distortion.

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Abstract

The invention provides an optical lens and an imaging device, which belong to the technical field of optical imaging; the optical lens has six lenses in total, which sequentially include: a first lens with negative refractive power; Second lens with optical power; third lens with positive optical power; stop; fourth lens with positive optical power; fifth lens with negative optical power; sixth lens with positive optical power; optical lens Satisfied condition formula: 2.1mm ‑1 <TTL / (IH*f)<2.4mm ‑1 , where TTL, f, and IH represent the total optical length of the optical lens, the effective focal length, and half of the maximum diameter of the effective pixel area on the imaging surface, respectively. The optical lens has the characteristics of large aperture, high resolution, and positive F-Theta distortion to 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 present invention relates to the technical field of optical imaging, in particular to an optical lens and an imaging device. Background technique [0002] Traditional aerial photography can only shoot ground objects from a vertical angle, while oblique photography can effectively make up for the limitations of traditional aerial photography by mounting multiple lenses on the same platform and collecting images from different angles such as vertical and side views. 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; Automated 3D modeling; oblique photography data is measurable image data with spatial position information, and can ou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B7/02G02B1/00
CPCG02B13/0005G02B13/0045G02B1/00G02B7/025
Inventor 张歆越王克民
Owner JIANGXI LIANCHUANG ELECTRONICS CO LTD
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