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Optical imaging system

An optical imaging system and optical axis technology, applied in the field of wide-angle lenses, can solve the problems of limiting the total length of the lens, increasing the difficulty of lens design, etc., and achieving the effect of high imaging quality

Active Publication Date: 2018-11-13
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, due to the miniaturization of portable electronic products, the total length of the lens is limited, which increases the difficulty of lens design

Method used

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Experimental program
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Embodiment 1

[0071] Refer to the following Figure 1 to Figure 2D An optical imaging system according to Embodiment 1 of the present application is described. figure 1 A schematic structural diagram of an optical imaging system according to Embodiment 1 of the present application is shown.

[0072] like figure 1 As shown, the optical imaging system according to the exemplary embodiment of the present application includes sequentially along the optical axis from the object side to the image side: a first lens E1, a stop STO, a second lens E2, a third lens E3, and a fourth lens E4 , the fifth lens E5, the sixth lens E6, the filter E7 and the imaging surface S15.

[0073] The first lens E1 has negative refractive power, its object side S1 is convex, and its image side S2 is concave; the second lens E2 has positive refractive power, its object side S3 is convex, and its image side S4 is concave; the third lens E3 has Positive refractive power, the object side S5 is convex, and the image sid...

Embodiment 2

[0100] Refer to the following Figure 3 to Figure 4D An optical imaging system according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted. image 3 A schematic structural diagram of an optical imaging system according to Embodiment 2 of the present application is shown.

[0101] like image 3 As shown, the optical imaging system according to the exemplary embodiment of the present application includes sequentially along the optical axis from the object side to the image side: a first lens E1, a stop STO, a second lens E2, a third lens E3, and a fourth lens E4 , the fifth lens E5, the sixth lens E6, the filter E7 and the imaging surface S15.

[0102]The first lens E1 has positive refractive power, its object side S1 is convex, and the image side S2 is concave; the second lens E2 has positive refractive power, its object side S3 is c...

Embodiment 3

[0115] Refer to the following Figure 5 to Figure 6D An optical imaging system according to Embodiment 3 of the present application is described. Figure 5 A schematic structural diagram of an optical imaging system according to Embodiment 3 of the present application is shown.

[0116] like Figure 5 As shown, the optical imaging system according to the exemplary embodiment of the present application includes sequentially along the optical axis from the object side to the image side: a first lens E1, a stop STO, a second lens E2, a third lens E3, and a fourth lens E4 , the fifth lens E5, the sixth lens E6, the filter E7 and the imaging surface S15.

[0117] The first lens E1 has positive refractive power, its object side S1 is convex, and the image side S2 is concave; the second lens E2 has positive refractive power, its object side S3 is concave, and the image side S4 is convex; the third lens E3 has a negative Refractive power, the object side S5 is concave, and the imag...

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Abstract

The invention discloses an optical imaging system. The optical imaging system sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a six lens along the optical axis from the object side to the image side, wherein the first lens has focal power, and the object side of the first lens is a convex face; the second lens has focal power; the third lens has focal power, and the image side of the third lens is a convex face; the fourth lens has focal power, the object side of the fourth lens is a convex face, and the image side of the fourth lens is a concave face; the fifth lens has positive focal power, and the object side of the fifth lens is a convex face; the sixth lens has negative focal power, and the object side of the sixth lens is a concave face. The maximum half field of view HFOV of the optical imaging system is larger than 50 degrees and smaller than 60 degrees, and the ratio of the curvature radius R7 of the fourth lens object side tothe total effective focal length f of the optical imaging system is larger than 0.4 and smaller than 1.5.

Description

technical field [0001] The present application relates to an optical imaging system, and more specifically, the present application relates to a wide-angle lens including six lenses. Background technique [0002] With the popularity of portable electronic products such as mobile phones and tablet computers, people have higher and higher requirements on the shooting function of portable electronic products. On the one hand, since portable electronic products tend to be miniaturized, the overall length of the lens is limited, which increases the difficulty of lens design. On the other hand, as the performance and size of common photosensitive elements such as photosensitive coupling device (CCD) or complementary metal oxide semiconductor device (CMOS) are improved and the size is reduced, the number of pixels of the photosensitive element is increased and the size of the pixel is reduced. , thus putting forward higher requirements for the high imaging quality and miniaturizat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18
CPCG02B13/0045G02B13/06G02B13/18G02B9/62G02B13/04
Inventor 胡亚斌冯涛
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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