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Optical system, lens module and electronic equipment

A technology of optical systems and electronic equipment, applied in the direction of optics, optical components, instruments, etc., can solve problems such as small depth of field, low resolution, and existence of driving risks

Active Publication Date: 2021-08-13
JIANGXI JINGCHAO OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the side-view camera lenses currently on the market have low resolution and a small depth of field. The driver cannot accurately obtain the details of the long-distance shooting in real time, making it difficult to make timely warnings, resulting in the existence of driving risks.

Method used

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  • Optical system, lens module and electronic equipment
  • Optical system, lens module and electronic equipment
  • Optical system, lens module and electronic equipment

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0043] Please refer to figure 1 and figure 2 , the optical system of this embodiment includes in sequence from the object side to the image side along the optical axis direction:

[0044] The first lens L1 has a negative refractive power. The object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 of the first lens L1 is concave at the near optical axis.

[0045] The second lens L2 has negative refractive power. The object side S3 of the second lens L2 is convex at the near optical axis, the image side S4 is concave at the near optical axis, and both the object side S3 and the image side S4 are aspherical .

[0046] The third lens L3 has a negative refractive power. The object side S5 of the third lens L3 is convex at the near optical axis, and the image side S6 of the third lens L3 is concave at the near optical axis.

[0047] The fourth lens L4 has positive refractive power, and both the object side S7 and the image side S8 of the fo...

no. 2 example

[0067] Please refer to image 3 and Figure 4 , the optical system of this embodiment includes in sequence from the object side to the image side along the optical axis direction:

[0068] The first lens L1 has a negative refractive power. The object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 of the first lens L1 is concave at the near optical axis.

[0069] The second lens L2 has negative refractive power. The object side S3 of the second lens L2 is convex at the near optical axis, the image side S4 is concave at the near optical axis, and both the object side S3 and the image side S4 are aspherical .

[0070] The third lens L3 has a negative refractive power. The object side S5 of the third lens L3 is convex at the near optical axis, and the image side S6 of the third lens L3 is concave at the near optical axis.

[0071] The fourth lens L4 has positive refractive power, and both the object side S7 and the image side S8 of the fo...

no. 3 example

[0085] Please refer to Figure 5 and Figure 6 , the optical system of this embodiment includes in sequence from the object side to the image side along the optical axis direction:

[0086] The first lens L1 has a negative refractive power. The object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 of the first lens L1 is concave at the near optical axis.

[0087] The second lens L2 has negative refractive power. The object side S3 of the second lens L2 is convex at the near optical axis, the image side S4 is concave at the near optical axis, and both the object side S3 and the image side S4 are aspherical .

[0088] The third lens L3 has a negative refractive power. The object side S5 of the third lens L3 is convex at the near optical axis, and the image side S6 of the third lens L3 is concave at the near optical axis.

[0089] The fourth lens L4 has positive refractive power, and both the object side S7 and the image side S8 of the f...

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Abstract

The invention discloses an optical system, a lens module and electronic equipment. The optical system sequentially comprises a first lens to a seventh lens from an object side to an image side along an optical axis. The first lens, the second lens, the third lens and the sixth lens have negative refractive power, and the fourth lens, the fifth lens and the seventh lens have positive refractive power. The object side surfaces of the first to fifth lenses and the seventh lens and the image side surfaces of the fourth, fifth and seventh lenses are convex at a paraxial region, and the object side surface of the sixth lens and the image side surfaces of the first to third lenses and the sixth lens are concave at a paraxial region. The optical system satisfies the relational expression: -3 < f47 / f13 <-2. Through reasonable design of the surface type, the refractive power and the focal power of f13 and f47 of the optical system, the optical system ensures high imaging resolution, improves the imaging picture definition in a wider range and increases the depth of field, so that detail information of an image can be captured during long-distance imaging.

Description

technical field [0001] The invention belongs to the technical field of optical imaging, and in particular relates to an optical system, a lens module and electronic equipment. Background technique [0002] With the development of the automotive industry, the technical requirements for automotive driving assistance cameras such as front view, side view, automatic cruise, driving recorder, and reversing images are getting higher and higher. The side-view camera allows the driver to intuitively identify and monitor obstacles and pedestrians in the blind spots on the left and right sides of the car while the car is driving, so that the car can turn when passing through special places (such as intersections, roadblocks, parking lots, etc.). When turning around, the side-view camera can be turned on at any time to make judgments on the driving environment and feed back to the car central system to make correct instructions to avoid driving accidents. Provide a basis for the judgm...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/06G02B13/18G03B30/00
CPCG02B13/0045G02B13/06G02B13/18G02B13/006
Inventor 乐宇明蔡雄宇兰宾利赵迪
Owner JIANGXI JINGCHAO OPTICAL CO LTD
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