Optical image capturing system, image capturing module and electronic device

An optical imaging system and optical axis technology, applied in optics, optical components, instruments, etc., can solve the problems of difficult to meet high-resolution large-scale use, high processing cost, complex structure to improve resolution, and reduce ghosting. risk, reduce processing difficulty, and improve the effect of wide-angle

Active Publication Date: 2021-04-23
TIANJIN OFILM OPTO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the process of implementing this application, the applicant found that there are at least the following problems in the prior art: the existing structure for improving resolution is relatively complicated, and the processing cost is high, so it is difficult to meet the needs of high-resolution large-scale use

Method used

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

Examples

Experimental program
Comparison scheme
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no. 1 example

[0114] Please refer to figure 1 The optical imaging system 10 of the first embodiment includes a stop STO, a lens L1 with positive refractive power, and a protective plate L2 sequentially from the object side to the image side.

[0115] Wherein, the object side S2 of the lens L1 is concave at the near optical axis, and the image side S3 is convex at the near optical axis.

[0116]The reference wavelength of the focal length in the first embodiment is 10000 nm, the reference wavelength of the material refractive index and Abbe number is 587.56 nm, and the optical imaging system 10 in the first embodiment satisfies the conditions in Table 1 below. Wherein, the Y radius in this embodiment is the curvature radius of the lens L1 at the near optical axis.

[0117] Table 1

[0118]

[0119] It should be noted that f is the effective focal length of the optical imaging system 10, FNO is the aperture number of the optical imaging system 10, FOV is the maximum field of view of the ...

no. 2 example

[0128] Please refer to image 3 , the optical imaging system 10 of the second embodiment includes a diaphragm STO, a lens L1 with positive refractive power, and a protective plate L2 sequentially from the object side to the image side.

[0129] Wherein, the object side S2 of the lens L1 is concave at the near optical axis, and the image side S3 is convex at the near optical axis.

[0130] The reference wavelength of focal length in the second embodiment is 10000 nm, the reference wavelength of material refractive index and Abbe number is 587.56 nm, and the optical imaging system 10 in the second embodiment satisfies the conditions in Table 3 below. Wherein, the Y radius in this embodiment is the curvature radius of the lens L1 at the near optical axis.

[0131] table 3

[0132]

[0133] It should be noted that f is the effective focal length of the optical imaging system 10, FNO is the aperture number of the optical imaging system 10, FOV is the maximum field of view of t...

no. 3 example

[0142] Please refer to Figure 5 The optical imaging system 10 of the third embodiment includes a stop STO, a lens L1 with positive refractive power, and a protective plate L2 sequentially from the object side to the image side.

[0143] Wherein, the object side S2 of the lens L1 is concave at the near optical axis, and the image side S3 is convex at the near optical axis.

[0144] The reference wavelength of focal length in the third embodiment is 10000 nm, the reference wavelength of material refractive index and Abbe number is 587.56 nm, and the optical imaging system 10 in the third embodiment satisfies the conditions in Table 5 below. Wherein, the Y radius in this embodiment is the curvature radius of the lens L1 at the near optical axis.

[0145] table 5

[0146]

[0147] It should be noted that f is the effective focal length of the optical imaging system 10, FNO is the aperture number of the optical imaging system 10, FOV is the maximum field of view of the optica...

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Abstract

The invention provides an optical imaging system, an image capturing module and an electronic device. The optical imaging system sequentially comprises a diaphragm, a lens and a protection flat plate from the object side to the image side along the optical axis. The lens has positive refractive power, the object side surface of the lens is a concave surface at a paraxial region, the image side surface of the lens is a convex surface at a paraxial region, and the object side surface and the image side surface of the lens are aspheric surfaces; and the optical imaging system satisfies the following relational expressions that 9<SDs1 / the absolute value of sags1<12 , wherein SDs1 is the maximum clear aperture of the object side surface of the lens, and sags1 is the distance from the maximum clear aperture of the object side surface of the lens to the central point of the object side surface of the lens, which is parallel to the optical axis. According to the optical imaging system, the aspheric lens with positive refractive power is adopted, the total optical length is small, a large field angle range can be obtained, the wide angle of the optical imaging system can be improved, and the imaging quality is improved by reasonably configuring the curvature of the object side face of the lens.

Description

technical field [0001] The present application relates to optical imaging technology, in particular to an optical imaging system, an imaging module and an electronic device. Background technique [0002] As a non-contact recognition method, the infrared imaging system has the advantages of all-weather recognition and high recognition rate compared with visible light recognition, with higher security and wider application scenarios. At present, infrared imaging systems are widely used, but the market demand for high-resolution imaging systems is getting higher and higher. At present, the imaging quality of optical imaging systems is usually improved by balancing lens miniaturization, applying large apertures, and using diffractive surfaces. [0003] During the process of implementing the present application, the applicant found at least the following problems in the prior art: the existing resolution-enhancing structure is relatively complicated, and the processing cost is hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/14G02B13/18
Inventor 乐宇明蔡雄宇许哲源赵迪
Owner TIANJIN OFILM OPTO ELECTRONICS CO LTD
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