Large-aperture small-distortion optical lens

An optical lens and aperture technology, applied in the field of optical imaging, can solve the problems of not being able to meet the requirements of large aperture and small distortion at the same time, poor stability, and poor transparency of imaging images.

Pending Publication Date: 2018-04-10
信华精机有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the lens disclosed in the above-mentioned patent still has the problem of being unable to meet the requirements of large aperture and small distortion at the same time due to uncorrected distortion while mai...

Method used

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  • Large-aperture small-distortion optical lens
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  • Large-aperture small-distortion optical lens

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Embodiment Construction

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0024] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of ill...

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Abstract

The invention discloses a large-aperture small-distortion optical lens, and the optical lens comprises a front lens group, a diaphragm element, a rear lens group and a light filter, wherein the frontlens group, the diaphragm element, the rear lens group and the light filter are sequentially arranged from the object space to the image space. The front lens group comprises a first lens, a second lens, a third lens and a fourth lens, and the rear lens group comprises a fifth lens, a sixth lens and a seventh lens. The first lens, the third lens and the seventh lens are all spherical lenses, and the fifth lens and the sixth lens are combined to form a bonding lens with the positive focal power. According to the invention, the first, second and seventh lenses are all aspherical lenses, therebyeffectively reducing the volume of the lens, and enabling the structure of the lens to be more compact. The optical lens is small in size, is small in optical distortion, basically has no distortion in image, is high in imaging quality, and is accurate in imaging color.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to an optical lens with large aperture and small distortion. Background technique [0002] With the continuous advancement of automotive driver assistance technology (ADAS), the application of cameras in ADAS systems is becoming more and more extensive. The front-view camera is the most vehicle-mounted front-view camera. It is mainly used for auxiliary functions such as pedestrian collision avoidance, road deviation, and vehicle ranging. Existing camera products cannot meet the requirements of large aperture and small distortion while maintaining a small size and high definition. [0003] For example, Chinese patent 2017100325929 discloses a high-definition fixed-focus lens with super large aperture, which uses eight lenses, including three plastic aspheric lenses, which are small in size and large in aperture, and the use of plastic aspheric lenses can effectively reduce c...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/18G02B13/06G02B7/02G03B30/00
CPCG02B7/025G02B13/0045G02B13/06G02B13/18
Inventor 冷家开彭嘉龙黄福建宋勇宋政娟
Owner 信华精机有限公司
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