Optical imaging lens

An optical imaging lens and lens technology, applied in optics, optical components, instruments, etc., can solve the problems of poor imaging quality of telephoto lenses, achieve the effect of small chromatic aberration, increase imaging quality, and ensure imaging quality

Active Publication Date: 2021-07-16
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide an optical imaging lens to solve the problem of poor imaging quality of telephoto lenses in the prior art

Method used

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Embodiment 1

[0067] Such as Figure 1 to Figure 16 As shown, along the optical axis from the object side of the optical imaging lens to the image side of the optical imaging lens, it includes a first lens, a second lens, a third lens, a prism and a diffraction element 10, the first lens has a positive refractive power; the second lens It has negative refractive power; the third lens has positive refractive power; the diffraction element 10 is arranged between the prism and the object to be shot, and the diffraction efficiency ef of the diffraction element 10 in the range of visible light is ≥ 80%.

[0068] By arranging the prism on the optical imaging lens, the chromatic aberration of the optical imaging lens can be balanced, and the imaging quality of the optical imaging lens can be effectively increased. The diffractive element 10 has a unique negative dispersion characteristic, which can correct the chromatic aberration of the optical system when combined with the optical system, so tha...

Embodiment 2

[0090] Such as Figure 1 to Figure 16 As shown, along the optical axis from the object side of the optical imaging lens to the image side of the optical imaging lens, it includes a first lens, a second lens, a third lens, a prism and a diffraction element 10, the first lens has a positive refractive power; the second lens It has negative refractive power; the third lens has positive refractive power; the diffractive element 10 is arranged between the prism and the object to be shot, and the thickness T4 of the diffractive element 10 satisfies: T4<0.6mm.

[0091]By arranging the prism on the optical imaging lens, the chromatic aberration of the optical imaging lens can be balanced, and the imaging quality of the optical imaging lens can be effectively increased. The diffractive element 10 has a unique negative dispersion characteristic, which can correct the chromatic aberration of the optical system when combined with the optical system, so that the optical imaging lens has le...

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Abstract

The invention provides an optical imaging lens. From the object side of the optical imaging lens to the image side of the optical imaging lens along the optical axis, the optical imaging lens comprises: a first lens having positive focal power; a second lens having negative focal power; a third lens having positive focal power; a prism; and a diffraction element, wherein the diffraction element is arranged between the prism and an irradiated object, and the diffraction efficiency ef of the diffraction element in the visible light range is larger than or equal to 80%. According to the invention, the problem of poor imaging quality of a telephoto lens in the prior art is solved.

Description

technical field [0001] The present invention relates to the technical field of optical imaging equipment, in particular to an optical imaging lens. Background technique [0002] With the development of mobile communications and the rapid development of electronic equipment such as smart phones and computers, photography has gradually become normalized in daily life. For distant objects that cannot be seen clearly by the naked eye, the telephoto lens has a clearer picture quality than ordinary lenses, and is more and more favored by consumers. The high image quality of telephoto lenses will be the trend in the future. [0003] That is to say, the telephoto lens in the prior art has the problem of poor imaging quality. Contents of the invention [0004] The main purpose of the present invention is to provide an optical imaging lens to solve the problem of poor imaging quality of the telephoto lens in the prior art. [0005] In order to achieve the above object, according t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0035G02B13/0055G02B13/0065G02B13/18
Inventor 张成卓国成立龙思琛戴付建赵烈烽
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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