Camera lens

A camera lens and image square technology, applied in the field of camera lenses, can solve the problem that the total optical length of the lens cannot be further reduced, and achieve the effect of reducing the total optical length

Active Publication Date: 2012-01-11
BYD SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the total optical length of the lens in the prior art cannot be further reduced, the present invention provides a camera lens

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The camera lens in this embodiment includes a single silicone lens, and is mainly used in the field of application of the camera lens that requires ultra-thinness.

[0023] figure 1 It is a structural schematic diagram of the camera lens according to Embodiment 1 of the present invention. Please refer to figure 1 , the imaging lens provided by Embodiment 1 of the present invention includes a fixed diaphragm 1, a silicone lens 2 and an infrared filter film 3, and the silicone lens includes a first surface 21 and a second surface 22 in sequence from the object side to the image side, and the fixed The aperture 1 and the silicone lens 2 form a coaxial optical system. The first surface 21 is aspherical and convex to the object side, the second surface 22 is aspheric and convex to the image side, the first surface 21 and the second surface 22 are asymmetrical with respect to the lens centerline, therefore, the The silicone lens 2 is an asymmetrical drum type. The lens ce...

Embodiment 2

[0043] refer to Figure 5 , propose the second embodiment of the present invention, this embodiment is based on the first embodiment, and further proposes the relevant parameters of the camera lens as follows:

[0044] Table three

[0045]

[0046]

[0047] Table 4: Aspherical Coefficients

[0048] first surface

second surface

a1：0.015408005

a1：2.8169146

a2：1.0521064

a2：-0.61458389

a3：-22.564498

a3：66.460052

a4：112.23604

a4：-696.8954

a5：0

a5：3395.6174

a6：0

a6：-6242.5572

[0049] In Table 3, the thickness d is the distance between one surface and the next surface, the total length of the camera lens is L=1.7mm, the effective focal length is f=1.4mm, and L / f=1.21>1.2.

[0050] In this embodiment, the refractive index of the silica gel lens is n=1.52, and the dispersion value v=43.

[0051] Figure 6 It is the modulation transfer function (Modulation Transfer Fu...

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Abstract

The invention provides a camera lens, which comprises a silicone lens and an infrared filter membrane. The silicone lens comprises a first surface and a second surface arranged sequentially from an object side to an image side, and the infrared filter membrane is arranged on the first surface or the second surface. Since the infrared filter membrane is directly formed on the surface of the silicone lens, flat glass coated with the infrared filter membrane on the rear surface of the lens of the existing camera lens is eliminated, and further, the whole optical length of the camera lens is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of optical imaging, in particular to a camera lens. Background technique [0002] The rapid development of science and technology in modern society, especially the development of 3G or 4G communication technology, endows mobile phones with more and more functional connotations and more and more technical requirements. The 3G standard camera is divided into front and rear. The rear camera is responsible for taking pictures, and it is required to take clear, sharp and high-resolution pictures. Therefore, most of the rear cameras are high-pixel cameras, and the pixel requirements of users are still increasing; while the front-facing cameras are used for video calls. Due to the requirements of communication bandwidth and transmission speed, the pixel requirements are not high. , mostly 300,000 pixels, but there are certain requirements for its field of view, generally above 63°, so that users can use the video ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/14G02B13/18G02B13/00
Inventor 姜莉莉
Owner BYD SEMICON CO LTD
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