1.4-mm wide-angle optical system and imaging method thereof
A wide-angle optical system and light technology, applied in optics, optical components, instruments, etc., can solve the problems of insufficient edge light flux at large field angles, inability to meet the requirements of miniaturization, and insufficient edge imaging, etc., to achieve favorable Large-scale production, excellent imaging quality, and good edge imaging quality
Pending Publication Date: 2020-02-18
FUJIAN FUGUANG TIANTONG OPTICS
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Problems solved by technology
Common rear-view lenses generally use 5-6 pieces of all-glass lens structure. The lens is large in size and heavy in weight, which cannot meet the requirements of miniaturization, and the manufacturing cost is high; in addition, the common rear-view lens has a small aperture, resulting in large The amount of light passing through the edge at the field of view is insufficient, the edge imaging is not clear enough, and the overall image quality is affected
Method used
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Embodiment 1
[0034] Example 1: The air gap between the first lens and the second lens is 1.67mm, the air gap between the third lens and the fourth lens is 0.27mm, and the air gap between the fourth lens and the fifth lens is 0.12mm mm, the air gap between the front group lens and the rear group lens is 1.15mm.
[0035] Table 1 shows the radius of curvature R, thickness d, refractive index N of each lens of the optical lens of embodiment 1 d and the Abbe number V d .
[0036]
[0037] Table 1 Specific lens parameter list
[0038] In this embodiment, five lenses are used as an example. By rationally allocating the focal power, surface shape, center thickness of each lens, and the axial distance between each lens, etc., the field of view of the lens can be effectively expanded and the lens can be shortened. The overall length ensures small distortion and high illumination of the lens; at the same time corrects various aberrations to improve the resolution and imaging quality of the lens...
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Abstract
The invention relates to a 1.4-mm wide-angle optical system comprising a first lens, a second lens, a diaphragm, a third lens, a fourth lens and a fifth lens which are sequentially arranged at intervals from left to right along a light incident light path. The first lens is a negative meniscus lens and the second lens is a positive meniscus lens; the first lens and the second lens form a front lens group with negative focal power; and the concave surface of the first lens faces the diaphragm and the concave surface of the second lens is arranged with the backs against the diaphragm. The thirdlens is a biconvex positive lens, the fourth lens is a biconcave negative lens, and the fifth lens is a biconvex positive lens; the third lens, the fourth lens, and the fifth lens form a rear lens group with positive focal power. According to the invention, the system has characteristics of large field angle and large light flux; on the basis of the design scheme of multiple aspheric lenses, the overall reliability is high, the lens group assembly sensitivity is low, the yield is high, the cost is low and large-scale production is facilitated; and the imaging quality is high, and the two-megapixel high-definition camera shooting level is reached.
Description
technical field [0001] The invention relates to a 1.4mm wide-angle optical system and an imaging method thereof. Background technique [0002] Vehicle rearview lenses are widely used in vehicle monitoring systems to provide drivers with functions such as rearview images and reversing assistance. With the development of the automobile industry, higher requirements are put forward for the performance of the vehicle rearview lens. Common rear-view lenses generally use 5-6 pieces of all-glass lens structure. The lens is large in size and heavy in weight, which cannot meet the requirements of miniaturization, and the manufacturing cost is high; in addition, the common rear-view lens has a small aperture, resulting in large The amount of light passing through the edge at the field of view is insufficient, the edge imaging is not clear enough, and the overall image quality is affected. [0003] In view of the deficiencies in the prior art, the present invention aims to provide a ...
Claims
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IPC IPC(8): G02B13/00G02B13/06G02B13/18G02B1/04
CPCG02B13/0045G02B13/06G02B13/18G02B1/041
Inventor 罗杰黄杰冯科谢圣荣
Owner FUJIAN FUGUANG TIANTONG OPTICS