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Telephoto lens and camera device

A lens and lens technology, applied in image communication, television, optics, etc., can solve the problems of lack of design freedom, difficulty in meeting the demand for high imaging performance, and inability to obtain clear images

Active Publication Date: 2017-05-10
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to meet miniaturization, it is necessary to reduce the number of lenses of the imaging lens as much as possible, but the resulting lack of design freedom will make it difficult to meet the market demand for high imaging performance
At present, mainstream telephoto lenses use wide-angle optical systems to obtain wide-angle images, but this is not conducive to shooting distant objects and cannot obtain clear images

Method used

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  • Telephoto lens and camera device
  • Telephoto lens and camera device
  • Telephoto lens and camera device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0124] Refer to the following Figure 1 to Figure 2D Example 1 of the telephoto lens of the above-described embodiment of the present application is described.

[0125] Such as figure 1As shown, Embodiment 1 of the telephoto lens includes a first lens E1 having an object side S1 and an image side S2, a second lens E2 having an object side S3 and an image side S4, a third lens E2 having an object side S5 and an image side S6 Lens E3, a fourth lens E4 having an object side S7 and an image side S8, and a fifth lens E5 having an object side S9 and an image side S10. In this embodiment, the first lens can have positive refractive power, and its object side can be convex; the second lens can have negative refractive power, and its image side can be concave; the third lens can have positive refractive power or negative optical power; the fourth lens may have positive optical power; and the fifth lens may have negative optical power, and its object side may be concave. The telephot...

Embodiment 2

[0140] Refer to the following Figure 3 to Figure 4D Embodiment 2 of the above-mentioned telephoto lens of the present application is described. In addition to the parameters of each lens of the telephoto lens, such as the radius of curvature, thickness, material, conic coefficient, effective focal length, axial distance, and high-order coefficients of each mirror surface of each lens, in this embodiment 2 The arrangement structure of the telephoto lens described in the following embodiments is the same as that of the telephoto lens described in Embodiment 1. For the sake of brevity, part of the description similar to Embodiment 1 will be omitted.

[0141] image 3 A schematic structural diagram of a telephoto lens according to Embodiment 2 of the present application is shown. Such as image 3 As shown, the telephoto lens according to Embodiment 2 includes first to fifth lenses E1 - E5 respectively having an object side and an image side.

[0142] The effective focal leng...

Embodiment 3

[0156] Refer to the following Figure 5 to Figure 6D Embodiment 3 of the above telephoto lens of the present application is described. Figure 5 A schematic structural diagram of a telephoto lens according to Embodiment 3 of the present application is shown. Such as Figure 5 As shown, the telephoto lens according to Embodiment 3 includes first to fifth lenses E1 - E5 respectively having an object side and an image side.

[0157] The effective focal lengths f1 to f5 of the lenses in Example 3, the total effective focal length f of the telephoto lens, the total length TTL of the imaging lens, and half the maximum field of view HFOV of the telephoto lens are shown in Table 7 below.

[0158] f1(mm) 2.81 f(mm) 5.62 f2(mm) -4.48 TTL(mm) 5.30 f3(mm) -38.15 HFOV(deg) 29.7 f4(mm) 11.74 f5(mm) -4.58

[0159] Table 7

[0160] Referring to Table 7, the on-axis distance TTL from the object side of the first lens to the imaging pl...

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PUM

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Abstract

The invention provides a telephoto lens. The telephoto lens comprises a first lens, a second lens, a third lens, a fourth lens and at least one subsequent lens which are successively arranged from an object side to an image side along an optical axis, wherein the first lens has positive focal power; an object-side wall of the first lens is arranged as a convex surface; an axis distance TTL from the object-side wall to an imaging wall of the first lens and a total effective focal length f of the telephoto lens meet the condition that TTL / f is less than or equal to 1.0; the fourth lens has positive focal power; and an effective focal length f1 of the first lens, the effective focal length f4 of the fourth lens and the total effective focal length f meet the condition that |f / f1|+|f / f4| is more than 1 but less than or equal to 2.7.

Description

technical field [0001] The present application relates to a telephoto lens and an imaging device equipped with such a telephoto lens. Background technique [0002] With the performance improvement and size reduction of CCD (charge-coupled device, electrically coupled device) and CMOS (complementary metal-oxide semiconductor, complementary metal oxide semiconductor) image sensor, the corresponding telephoto lens also needs to meet high imaging quality and miniaturization requirements. [0003] In addition, as people have higher and higher requirements on the imaging quality of portable electronic products, electronic products such as mobile phones and tablet computers will become thinner and smaller. In order to meet miniaturization, it is necessary to reduce the number of lenses of the imaging lens as much as possible, but the resulting lack of design freedom will make it difficult to meet the market demand for high imaging performance. At present, mainstream telephoto len...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/02G02B13/18
CPCG02B13/0045G02B13/02G02B13/18G02B9/60G02B27/0025H04N23/55
Inventor 张凯元闻人建科黄林戴付建
Owner ZHEJIANG SUNNY OPTICAL CO LTD