Optical imaging lens group

A technology of optical imaging and lens group, applied in optics, optical components, instruments, etc., can solve problems such as poor imaging quality

Active Publication Date: 2021-07-09
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to provide an optical imaging lens group t

Method used

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Examples

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Embodiment 1

[0055] Such as Figure 1 to Figure 32 As shown, the optical imaging lens group includes a first lens, a second lens, a third lens and a fourth lens in sequence along the optical axis from the object side to the image side, the first lens has a positive refractive power; the second lens has a negative refractive power The fourth lens has a positive refractive power; wherein, the on-axis distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens group and the effective focal length f of the optical imaging lens group satisfy: TTL / f<1.0.

[0056] By reasonably allocating the focal power of each lens, it is beneficial to balance the aberration generated by the optical imaging lens group, and greatly increase the imaging quality of the optical imaging lens group. By limiting the range of the ratio of the on-axis distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens group and the effective f...

Embodiment 2

[0068] Such as Figure 1 to Figure 32 As shown, the optical imaging lens group includes a first lens, a second lens, a third lens and a fourth lens in sequence along the optical axis from the object side to the image side, the first lens has positive refractive power; the object side of the second lens is a convex surface The object side of the third lens is a convex surface; the fourth lens has a positive refractive power; wherein, the object side of the first lens to the on-axis distance TTL of the imaging plane of the optical imaging lens group and the effective focal length f of the optical imaging lens group Satisfy: TTL / f<1.0.

[0069] By rationally allocating the surface shape and focal power of each lens, the tolerance sensitivity of each lens is reduced, the aberration of the optical imaging lens group is reduced, and the optical imaging lens group has high imaging quality. By limiting the range of the ratio of the on-axis distance TTL from the object side of the fir...

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Abstract

The invention provides an optical imaging lens group. The optical imaging lens group sequentially comprises, from an object side to an image side along an optical axis, a first lens with postive focal power; a second lens with negative focal power; a third lens; and a fourth lens with positive focal power. The on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens group and the effective focal length f of the optical imaging lens group meet the following condition: TTL/f< 1.0. The optical imaging lens group solves the problem of poor imaging quality of the optical imaging lens group in the prior art.

Description

technical field [0001] The present invention relates to the technical field of optical imaging equipment, in particular to an optical imaging lens group. Background technique [0002] A telephoto lens has a long focal length, a small viewing angle, and a large image on the film. Suitable for shooting distant subjects. Because its depth of field range is smaller than that of standard lenses, it can blur the background more effectively to highlight the focused subject, and the subject is generally far away from the camera, so the distortion in the perspective of the portrait is smaller, and the portrait taken is more vivid. . [0003] The telephoto shooting is more stable, but the traditional telescopic lens has the problem of unstable shooting. In addition, using a telescopic zoom lens will affect the thickness and reliability of the body, so internal zoom is the best way for mobile phones to achieve optical zoom. In order to achieve zooming in an ultra-thin body, the tel...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/02G02B13/18
CPCG02B13/004G02B13/02G02B13/18
Inventor 陈超计云兵戴付建赵烈烽
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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