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Optical system, image capturing module and electronic device

An optical system and optical axis technology, which is applied in the field of photography, can solve the problems of increased volume of electronic equipment, large axial size of camera lens, unfavorable miniaturization design of electronic equipment, etc.

Inactive Publication Date: 2022-05-27
NANCHANG O FILM OPTICAL ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to meet the requirements of high imaging quality, the axial dimension of the current camera lens is usually large, resulting in an increase in the volume of electronic equipment, which is not conducive to the miniaturization design of electronic equipment

Method used

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  • Optical system, image capturing module and electronic device
  • Optical system, image capturing module and electronic device
  • Optical system, image capturing module and electronic device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0099] See figure 1 and figure 2 , figure 1 It is a schematic structural diagram of the optical system 100 in the first embodiment. The optical system 100 sequentially includes a catadioptric lens L1 with positive refractive power, a second lens L2 with positive refractive power, and a negative refractive power from the object side to the image side. The third lens L3 and the fourth lens L4 with negative refractive power. figure 2 From left to right are graphs of longitudinal spherical aberration, astigmatism, and distortion of the optical system 100 in the first embodiment, wherein the reference wavelength of the astigmatism graph and the distortion graph is 555 nm, and the other embodiments are the same. In the first embodiment, the diaphragm STO is disposed on the image side surface of the catadioptric lens L1, for example, on the periphery of the first reflecting surface S2, and other embodiments are also the same.

[0100] The first refraction surface S1 is a concave...

no. 2 example

[0138] See Figure 4 and Figure 5 , Figure 4 It is a schematic structural diagram of the optical system 100 in the second embodiment. The optical system 100 sequentially includes a catadioptric lens L1 with positive refractive power, a second lens L2 with positive refractive power, and a negative refractive power from the object side to the image side. The third lens L3 and the fourth lens L4 with negative refractive power. Figure 5 From left to right are graphs of longitudinal spherical aberration, astigmatism and distortion of the optical system 100 in the second embodiment.

[0139] The first refraction surface S1 is a concave surface at the near optical axis 110, and a concave surface at the circumference;

[0140] The first reflecting surface S2 is a convex surface at the near-optical axis 110, and is a convex surface at the circumference;

[0141] The second reflective surface S3 is a concave surface at the near optical axis 110, and a concave surface at the circu...

no. 3 example

[0162] See Figure 7 and Figure 8 , Figure 7 It is a schematic structural diagram of the optical system 100 in the third embodiment. The optical system 100 sequentially includes a catadioptric lens L1 with positive refractive power, a second lens L2 with positive refractive power, and a negative refractive power from the object side to the image side. The third lens L3 and the fourth lens L4 with negative refractive power. Figure 8 From left to right are graphs of longitudinal spherical aberration, astigmatism and distortion of the optical system 100 in the third embodiment.

[0163] The first refraction surface S1 is a concave surface at the near optical axis 110, and a concave surface at the circumference;

[0164] The first reflecting surface S2 is a convex surface at the near-optical axis 110, and is a convex surface at the circumference;

[0165] The second reflective surface S3 is a concave surface at the near optical axis 110, and a concave surface at the circumf...

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Abstract

The invention relates to an optical system, an image capturing module and an electronic device. The optical system includes: a catadioptric lens having positive refractive power and including a first refracting surface, a first reflecting surface, a second reflecting surface and a second refracting surface, the first refracting surface and the second refracting surface facing an object side, the first reflecting surface and the second refracting surface facing an image side, and the second refracting surface facing an image side; the first refracting surface and the second reflecting surface are concave surfaces, and the first reflecting surface and the second refracting surface are convex surfaces; a second lens element with positive refractive power having an image-side surface being convex in a paraxial region thereof; a third lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof; the fourth lens element with refractive power has an object-side surface being concave in a paraxial region and an image-side surface being convex in a paraxial region. According to the optical system, the long-focus characteristic and the miniaturization design can be realized.

Description

technical field [0001] The invention relates to the field of imaging, in particular to an optical system, an imaging module and an electronic device. Background technique [0002] In recent years, with the rapid development of electronic devices such as smart phones, tablet computers, and e-readers, the application of camera lenses in electronic devices has become more and more extensive. Among them, the camera lens is usually equipped with multiple lenses with refractive power, and the camera lens needs to have enough space in the axial direction to deflect the light, so that the light from the object side can be incident on the imaging surface for imaging. However, in order to meet the requirement of high imaging quality, the axial dimension of the current camera lens is usually large, which leads to an increase in the volume of the electronic device, which is not conducive to the miniaturized design of the electronic device. SUMMARY OF THE INVENTION [0003] Based on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0065G02B13/0015G02B13/004G03B30/00
Inventor 游兴海
Owner NANCHANG O FILM OPTICAL ELECTRONICS TECH CO LTD
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