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Telephoto lens, telephoto camera module group, and electronic device

A telephoto lens and electronic device technology, applied in optical components, optics, instruments, etc., can solve the problem of length of the lens barrel and achieve the effect of shortening the length of the lens barrel

Pending Publication Date: 2018-11-23
JIANGXI JINGCHAO OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, telephoto lenses generally have longer barrels

Method used

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  • Telephoto lens, telephoto camera module group, and electronic device
  • Telephoto lens, telephoto camera module group, and electronic device
  • Telephoto lens, telephoto camera module group, and electronic device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0078] see Figure 1 to Figure 4 , the infrared lens 10 of the first embodiment includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and an infrared filter L5 from the object side to the image side.

[0079]The first lens L1 has positive refractive power and is made of plastic. The object side S1 is convex, and the image side S2 is convex at the optical axis and flat at the circumference, both of which are aspherical. The second lens L2 has negative refractive power and is made of plastic. The object side S3 is concave at the optical axis and flat at the circumference, the image side S4 is concave, the object side S3 is spherical, and the image side S4 is aspherical. The third lens L3 has positive refractive power and is made of plastic. The object side S5 is concave, and the image side S6 is convex, both of which are aspherical. The fourth lens L4 has a negative refractive power and is made of plastic. The object side S7 is concave, and the image sid...

no. 2 example

[0090] see Figure 5 to Figure 8 , the infrared lens 10 of the second embodiment includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and an infrared filter L5 from the object side to the image side.

[0091] The first lens L1 has a positive refractive power and is made of glass. The object side S1 is convex, and the image side S2 is convex, both of which are aspherical. The second lens L2 has negative refractive power and is made of glass. The object side S3 is concave at the optical axis and flat at the circumference, the image side S4 is concave, the object side S3 is spherical, and the image side S4 is aspherical. The third lens L3 has positive refractive power and is made of plastic. The object side S5 is concave, and the image side S6 is convex, both of which are aspherical. The fourth lens L4 has negative refractive power and is made of plastic. The object side S7 is concave, and the image side S8 is concave at the optical axis and convex at th...

no. 3 example

[0103] see Figure 9 to Figure 12 , the infrared lens 10 of the third embodiment includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and an infrared filter L5 from the object side to the image side.

[0104] The first lens L1 has a positive refractive power and is made of glass. The object side S1 is convex, and the image side S2 is convex, both of which are aspherical. The second lens L2 has a negative refractive power and is made of plastic. The object side S3 is concave, the image side S4 is concave at the optical axis and flat at the circumference, the object side S3 is spherical, and the image side S4 is aspherical. The third lens L3 has negative refractive power and is made of glass. The object side S5 is concave, and the image side S6 is concave at the optical axis and convex at the circumference, all of which are aspherical. The fourth lens L4 has positive refractive power and is made of plastic. The object side S7 is concave, and the image s...

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Abstract

The invention discloses a telephoto lens, a telephoto camera module group and an electronic device. According to the embodiment of the invention, the telephoto lens sequentially comprises a first lenshaving a positive refractive power, a second lens having a negative refractive power, a third lens having a refractive power and a fourth lens having a refractive power from the object side to the image side. The object side surface of the first lens is a convex surface. The object side surface and the image side surface of the second lens are both concave surfaces. The object side surface of thethird lens is a concave surface. The telephoto lens satisfies the following relationship: TTL / f<0.96, wherein TTL is the distance from the object side of the first lens to the imaging plane of the telephoto lens on the optical axis, and f is the effective focal length of the telephoto lens. The telephoto lens has a short TTL through a reasonable TTL configuration, thereby shortening the cone length of the telephoto lens.

Description

technical field [0001] The invention relates to optical imaging technology, in particular to a telephoto lens, a telephoto camera module and an electronic device. Background technique [0002] A telephoto lens has a long focal length, a small viewing angle, and a large image on the film. Therefore, at the same distance, it can shoot larger images than standard lenses, which is suitable for shooting distant objects. Because its depth of field range is smaller than that of standard lenses, it can blur the background more effectively to highlight the focused subject, and the subject is generally far away from the camera, so the distortion in the perspective of the portrait is smaller, and the portrait taken is more vivid. , so people often refer to telephoto lenses as portrait lenses. However, telephoto lenses generally have longer barrels. Contents of the invention [0003] In view of this, embodiments of the present invention provide a telephoto lens, a telephoto camera ...

Claims

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Application Information

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IPC IPC(8): G02B13/18
CPCG02B13/004
Inventor 邹海荣俞炳泽兰宾利
Owner JIANGXI JINGCHAO OPTICAL CO LTD
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