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Long-focal-length optical system

An optical system and telephoto technology, applied in the field of telephoto optical system, can solve the problems of multi-lens, unfavorable marketing, increase of lens production cost, etc., and achieve the effect of good imaging quality, reasonable price and excellent image quality

Pending Publication Date: 2018-03-30
DONGGUAN YUTONG OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If you need to design an ultra-high-definition lens with a large aperture, you need more lenses, which will undoubtedly greatly increase the production cost of the lens, which is not conducive to market promotion

Method used

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Embodiment Construction

[0023] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings. The accompanying drawings are only for reference and description, and do not constitute a limitation to the protection scope of the present invention.

[0024] Please refer to figure 1 , a kind of telephoto optical system of the present invention, comprises in sequence along the incident direction of light: a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5 and a sixth lens 6, wherein, The first lens 1, the second lens 2, the fourth lens 4, the fifth lens 5 and the sixth lens 6 are plastic aspheric lenses, and the third lens 3 is a glass lens, The first lens 1 is a concave-convex negative refractive power lens, the second lens 2 is a concave-convex positive refractive power lens, the first lens 1 and the second lens 2 are directly adjacent to each other through the edge, and the third The lens 3 is a double-convex po...

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Abstract

The invention relates to the technical field of optical lenses, and particularly relates to a long-focal-length optical system. The long-focal-length optical system sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens along an incident direction of light, wherein the first lens, the second lens, the fourth lens, the fifth lens and the sixthlens are plastic aspherical lenses, and the third lens is a glass lens. The local length of the whole lens of the long-focal-length optical system and the focal lengths of the first lens, the secondlens, the fourth lens, the fifth lens and the sixth lens meet the following relations: abs(f1 / f) is greater than 0.8 and less than 3.5; abs(f2 / f) is greater than 3.1 and less than 9.2; abs(f4 / f) is greater than 0.41 and less than 1.7; abs(f5 / f) is greater than 0.41 and less than 1.8; abs(f6 / f) is greater than 2.4 and less than 9.7; and abs(f4 / f5) is greater than 0.5 and less than 1.8. The long-focal-length optical system has the characteristics of compact structure, low production cost, good imaging quality and the like.

Description

technical field [0001] The invention relates to the technical field of optical lenses, in particular to a telephoto optical system. Background technique [0002] The telephoto lens has the effect of "zooming in" the distant scene, and can distinguish the details of the distant object. It is widely used in some places with long distance and large space. [0003] At present, telephoto lenses usually use 6-7 all-glass lenses, usually with a resolution of about 3 megapixels. [0004] With the development of the security industry, the pixels of cameras are getting higher and higher, and 4K-level imaging chips are also emerging, so lenses are needed to match them. It is obvious that the resolution of traditional telephoto lenses can no longer meet the needs of higher resolutions. asked for. [0005] For traditional glass spherical lenses, the ability to correct aberrations is limited, and the price is relatively high. If it is necessary to design an ultra-high-definition lens w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0045G02B13/18
Inventor 何剑炜
Owner DONGGUAN YUTONG OPTICAL TECH
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