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Zoom lens

A zoom lens and lens technology, applied in the field of zoom lens, can solve the problems of incoherent zoom, unsatisfactory intuitive effect, performance loss, etc.

Pending Publication Date: 2020-07-31
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the disadvantages of this multi-lens solution are very obvious
First of all, multiple lenses need to switch between multiple lenses when simulating the zoom effect, making the zoom incoherent. At the same time, lens switching will lead to unstable white balance, and the intuitive effect is not satisfactory when using it.
Secondly, in the process of switching from wide-angle state to standard state or from standard state to telephoto state, the focal length still uses the principle of digital crop zoom, which has a great loss in performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Refer to the following Figures 1 to 4C A zoom lens according to Embodiment 1 of the present application is described. figure 1 A schematic structural diagram of the zoom lens in the initial state according to Embodiment 1 of the present application is shown. figure 2 It shows a schematic structural view of the zoom lens according to Embodiment 1 of the present application when it is in a final state.

[0063] Such as figure 1 and figure 2 As shown, the zoom lens includes in sequence from the object side to the image side: the first lens E1, the second lens E2, the third lens E3, the diaphragm STO, the fourth lens E4, the fifth lens E5, the sixth lens E6, the Seven lenses E7, filter E8 and imaging surface S17.

[0064] The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is convex. 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 n...

Embodiment 2

[0081] Refer to the following Figure 5 to Figure 8C A zoom lens 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. Figure 5 A schematic structural diagram of the zoom lens in the initial state according to Embodiment 2 of the present application is shown. Figure 6 It shows a schematic structural view of the zoom lens according to Embodiment 2 of the present application when it is in a final state.

[0082] Such as Figure 5 and Figure 6 As shown, the zoom lens includes in sequence from the object side to the image side: the first lens E1, the second lens E2, the third lens E3, the diaphragm STO, the fourth lens E4, the fifth lens E5, the sixth lens E6, the Seven lenses E7, filter E8 and imaging surface S17.

[0083] The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 i...

Embodiment 3

[0098] Refer to the following Figures 9 to 12C A zoom lens according to Embodiment 3 of the present application is described. Figure 9 A schematic structural diagram of the zoom lens in an initial state according to Embodiment 3 of the present application is shown. Figure 10 It shows a schematic structural view of the zoom lens according to Embodiment 3 of the present application when it is in a final state.

[0099] Such as Figure 9 and Figure 10As shown, the zoom lens includes in sequence from the object side to the image side: the first lens E1, the second lens E2, the third lens E3, the diaphragm STO, the fourth lens E4, the fifth lens E5, the sixth lens E6, the Seven lenses E7, filter E8 and imaging surface S17.

[0100] The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is convex. 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 ...

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Abstract

The invention discloses a zoom lens. The zoom lens sequentially comprises a first lens group having positive focal power and a second lens group having negative focal power, wherein the first lens group comprises a first lens along the optical axis, and the second lens group comprises a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged along the optical axis. The zoom lens is advantaged in that the positions of the second lens to the seventh lens on the optical axis are changed to realize continuous zooming of the zoom lens,the total effective focal length ft when the zoom lens is in a final state and the total effective focal length fs when the zoom lens is in an initial state satisfy a formula of 1.3 <ft / fs <1.5.

Description

technical field [0001] The present application relates to the field of optical elements, in particular, to a zoom lens. Background technique [0002] With the development of science and technology, the development of lenses for portable electronic products such as mobile phones is also advancing by leaps and bounds. Today, mobile phones and other portable electronic products generally adopt a "baton" zoom solution in order to achieve the effect of zooming, that is, to simulate the zoom effect by switching the three lenses of "wide-angle lens, standard lens and telephoto lens". [0003] However, the disadvantages of this multi-lens solution are very obvious. First of all, multiple lenses need to switch between multiple lenses when simulating the zoom effect, making the zoom incoherent. At the same time, lens switching will lead to unstable white balance, and the intuitive effect is not satisfactory when using it. Secondly, the principle of digital crop zoom is still used in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/16
CPCG02B13/0045G02B13/009G02B15/1461G02B15/1421
Inventor 闻人建科戴付建赵烈烽
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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