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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 imaging quality

Active Publication Date: 2018-11-23
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 the case of insufficient light (such as rainy days, dusk, etc.), hand shake, etc., the F number is 2.0 Or lenses above 2.0 can no longer meet higher-level imaging requirements

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] 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 stop STO, a first lens E1, a second lens E2, a third lens E3, 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.

[0073] 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 concave, and its image side S4 is convex. The third lens E3 has negative refractive power, its object side S5 is ...

Embodiment 2

[0098] 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.

[0099] 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 stop STO, a first lens E1, a second lens E2, a third lens E3, 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.

[0100] 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 powe...

Embodiment 3

[0113] 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.

[0114] 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 stop STO, a first lens E1, a second lens E2, a third lens E3, 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.

[0115] 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 concave, and its image side S4 is convex. The third lens E3 has positive refractive power, its object side S5 i...

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Abstract

The invention discloses an optical imaging system, and the system sequentially comprises from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The first lens has the positive focal power. The second lens has the negative focal power, wherein the object side is a concave surface, and the image side is a convex surface. The third lens has the focal power. The fourth lens has the positive focal power, wherein the object side is a concave surface, and the image side is a convex surface. The fifth lens has the focal power, and the sixth lens has the focal power. The seventh lens has the negative focal power, wherein the object side is a convex surface. The total effective focal length f and the EPD (entrance pupil diameter) of the optical imaging system satisfy a relational expression: f / EPD<=1.8.

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 such as smart phones tend to be miniaturized, the overall length of the lens is limited, thereby increasing 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 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18
CPCG02B13/0045G02B13/06G02B13/18G02B9/64G02B27/0025
Inventor 游兴海张凯元黄林
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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