Optical imaging system

An optical imaging system and optical axis technology, applied in optics, optical components, instruments, etc., can solve problems such as inability to meet imaging requirements, and achieve high resolution and high imaging quality

Active Publication Date: 2018-09-14
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the continuous development of portable electronic products such as smart phones, higher requirements are put forward for the matching camera lens, especially in

Method used

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Embodiment 1

[0067] 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.

[0068] Such as 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 second lens E2, a third lens E3, a diaphragm STO, and a fourth lens E4 , the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8 and the imaging surface S17.

[0069] The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has negative refractive power, its object side S3 is convex, and its image side S4 is concave. The third lens E3 has positive refractive power, its object side S...

Embodiment 2

[0096] 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.

[0097] Such as 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 second lens E2, a third lens E3, a diaphragm STO, and a fourth lens E4 , the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8 and the imaging surface S17.

[0098]The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has negative refractive ...

Embodiment 3

[0111] 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.

[0112] Such as 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 second lens E2, a third lens E3, a diaphragm STO, and a fourth lens E4 , the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8 and the imaging surface S17.

[0113] The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has negative refractive power, its object side S3 is convex, and its image side S4 is concave. The third lens E3 has positive refractive power, its object side...

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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, a six lens and a seventh lens along the optical axis from the object side to the image side. The first lens and the third lens both have positive focal power; the second lens, the fourth lens, the fifth lens, the sixth lens andthe seventh lens all have positive focal power or negative focal power; the object side surface of the first lens is a convex surface and the image side surface is a concave surface; the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface; the object side surface of the seventh lens is a convex surface and the image side surface is a concave surface; the total effective focal length f of the optical imaging system and the entrance pupil diameter EPD of the optical imaging system meet the condition that f/EPD is smaller thanor equal to 1.5; the central thickness CT7 of the seventh lens on the optical axis, the central thickness CT5 of the fifth lens on the optical axis and half of the maximum angle of field of view HFOVof the optical imaging system meet the condition that CT7/CT5*TAN(HFOV) is larger than 1 and smaller than 2.

Description

technical field [0001] The present application relates to an optical imaging system, and more particularly, the present application relates to an optical imaging system including seven lenses. Background technique [0002] With the development of science and technology, portable electronic products gradually rise, and the portable electronic products with camera function are more favored by people, so the market demand for camera lenses suitable for portable electronic products is gradually increasing. 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 ...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0045G02B13/18G02B27/0025G02B27/0012G02B9/64
Inventor 黄林
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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