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High-light through high-definition fixed-focus aspheric lens

A fixed-focus lens and aspheric lens technology, applied in optics, optical components, instruments, etc., can solve the problems of increasing the light-receiving area of ​​the lens, image deterioration, and increasing lens aberration, and achieve correction of light coma and image correction. Poor, strong corrective effect

Active Publication Date: 2016-01-20
FUJIAN FORECAM OPTICS CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Network cameras are commonly used equipment in security systems, and lenses are the main components of network cameras. Lens performance directly affects imaging quality and imaging field of view. In lens design, increasing the amount of light is an effective way to improve image quality, but increasing the amount of light It means that the increase of the light-receiving area of ​​the lens may increase the aberration of the lens. When the aberration correction ability of the lens is insufficient, it is easy to cause image degradation due to the increase of the lens aberration. Therefore, how to increase the amount of light at the same time, Controlling the lens aberration in the lens within an acceptable range is a research direction

Method used

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Embodiment Construction

[0043] Such as figure 1 As shown, a Datong Guang high-definition fixed-focus aspheric lens, the lens includes a lens, a diaphragm 31 and a filter 32, the diaphragm 31 is located in the middle of the optical path of the lens, and the aperture of the diaphragm 31 is arranged on the central axis of the lens Above, the number of the lenses is six, respectively forming the entrance pupil group and the exit pupil group; the entrance pupil group is located on the entrance pupil side of the diaphragm 31, and its overall focal power is negative, and the lenses are arranged sequentially in the direction of the entrance pupil group optical path ( A1) 1, aspherical lens (A2) 2, lens (A3) 3, lens (A3) 3 is set close to the diaphragm 31; the exit pupil group is located on the exit pupil side of the diaphragm 31, and its overall refractive power is positive , the aspherical lens (B1) 21, convex lens (B2) 22 and concave lens (B3) 23 are arranged in sequence in the direction of the optical pat...

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Abstract

The invention discloses a high-light through high-definition fixed-focus aspheric lens. The lens comprises six lenses, a diaphragm and an optical filter. The diaphragm is arranged in the middle section of a lens optical path and on the middle axis of the lens body. The lenses form a pupil entrance group and a pupil exit group. The pupil entrance group is arranged on a diaphragm pupil entrance side and the overall focal power is negative. A lens (A1), an aspheric lens (A2) and a lens (A3) are sequentially arranged in the optical path direction of the pupil entrance group. The lens (A3) clings to the diaphragm. The pupil exit group is arranged on a diaphragm pupil exit side and the overall focal power is positive. An aspheric lens (B1), a convex lens (B2) and a concave lens (B3) are sequentially arranged in the optical path direction of the pupil exit group. The convex lens (B2) and the concave lens (B3) are glued and fixed together via the opposite concave and convex faces. The optical filter is arranged in the light exit direction of the pupil exit group. According to the invention, the aspheric lenses are used in the lens, so while light passing quantity of the lens is increased, the lens aberration can be controlled in an acceptable range.

Description

technical field [0001] The invention relates to an optical imaging device, in particular to a Datong Guang high-definition fixed-focus aspheric lens. Background technique [0002] Network cameras are commonly used equipment in security systems, and lenses are the main components of network cameras. Lens performance directly affects imaging quality and imaging field of view. In lens design, increasing the amount of light is an effective way to improve image quality, but increasing the amount of light It means that the increase of the light-receiving area of ​​the lens may increase the aberration of the lens. When the aberration correction ability of the lens is insufficient, it is easy to cause image degradation due to the increase of lens aberration. Therefore, how to increase the amount of light at the same time, Controlling the lens aberration in the lens within an acceptable range is a research direction. Contents of the invention [0003] The present invention propose...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0045G02B13/006G02B13/18
Inventor 张荣曜郭江龙林佳林飞
Owner FUJIAN FORECAM OPTICS CO LTD
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