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Large-aperture ultra-wide-angle optical lens

An optical lens, ultra-wide-angle technology, applied in the field of optical lenses, to achieve the effects of improving market competitiveness, low cost, and simple processing

Active Publication Date: 2015-02-04
东莞市明镜光学有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims at the deficiencies existing in the prior art, and its main purpose is to provide a large-aperture ultra-wide-angle optical lens, which solves the problem that the existing optical lens cannot achieve a large aperture ultra-wide-angle at the same time

Method used

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Embodiment Construction

[0043] Please refer to Figure 1 to Figure 9 As shown, it shows the specific structure of the preferred embodiment of the present invention, including a lens barrel 91 and a first lens 10, a second lens 20, The third lens 30, the fourth lens 40, the fifth lens 50, the sixth lens 60, the seventh lens 70 and the eighth lens 80, and the first lens 10, the second lens 20, the third lens 30 and the eighth lens 80 are spherical lenses with negative refractive power; the fourth lens 40, the fifth lens 50, the sixth lens 60 and the seventh lens 70 are all spherical lenses with positive refractive power. The first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, the sixth lens 60 and the seventh lens 70 are arranged at a small distance from each other, and the rear surface of the seventh lens 70 is connected to the eighth lens. The front surfaces of the lenses 80 are cemented to each other.

[0044] Among them, such as figure 2 As shown, the fi...

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Abstract

The invention discloses a large-aperture ultra-wide-angel optical lens. The large-aperture ultra-wide-angel optical lens comprises a lens cylinder and a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are coaxially arranged sequentially along the object space to the image space inside the lens cylinder; the first lens, the second lens, the third lens and the eighth lens are negative focal power spherical lenses; the fourth lens, the fifth lens, the sixth lens and the seventh lens are positive focal power spherical lenses. According to the large-aperture ultra-wide-angel optical lens, the lenses are arranged in specific curvature radiuses, thicknesses and intervals, then the viewing angle theta which is large can achieve 170 degrees, the aperture can achieve F2.0, the resolution is high, and accordingly the large-aperture ultra-wide-angel optical lens satisfies a high definition quality requirement, has a larger viewing angle and is particularly applicable to a high definition photosensitive product with the resolution being matched with a 16 million pixel chip, the high definition photosensitive product comprises an exercise DV (Digital Video), home security and protection, an automobile data recorder and the like.

Description

technical field [0001] The invention relates to the technology in the field of optical lenses, in particular to a large-aperture ultra-wide-angle optical lens. Background technique [0002] In recent years, as the application range of camera lenses has become more and more extensive, for example, sports DV, mobile phone cameras, vehicle lenses, security image monitoring and electronic entertainment and other industries, but the existing surveillance and vehicle lenses generally have such Disadvantages: The angle of view is not large enough, the aperture is small, and the overall size is large. When used for monitoring and on-board, it appears to be bulky and takes up more space. [0003] At present, with a lens with a total optical length of less than 30mm on a high-definition chip that is more than one-third of an inch, its viewing angle is often less than 140 degrees, and the overall range of the captured image is so small that it is necessary to install one or even a few ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/06G02B13/00
CPCG02B13/0045G02B13/005G02B13/06
Inventor 唐康国夏志勇
Owner 东莞市明镜光学有限公司
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