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Wide-angle lens and imaging equipment

A wide-angle lens and imaging surface technology, applied in optical components, optics, instruments, etc., can solve the problems of difficult to correct edge aberration, large incident angle of light, large f-θ distortion, etc., to eliminate chromatic aberration, large field of view, Effects of low tolerance sensitivity

Active Publication Date: 2019-12-24
合肥联创光学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of optical lens imaging technology, wide-angle lenses have achieved rapid development. However, due to the large f-θ distortion commonly found in current wide-angle imaging lenses, and the large incident angle of light, it is difficult to correct marginal aberrations. Tolerance sensitive, low assembly yield

Method used

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  • Wide-angle lens and imaging equipment

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0070] refer to figure 1 The wide-angle lens 100 provided by the first embodiment of the present invention includes in order from the object side to the imaging surface S18: a first group Q1, a stop ST, a second group Q2, a third group Q3, and a filter G1.

[0071] The first group Q1 has a negative power, and the first group Q1 sequentially includes two first lenses L1 with negative power, a second lens L2 with negative power, and a third lens with positive power L3, wherein the object-side surface S1 of the first lens L1 is convex, and the image-side surface S2 of the first lens L1 is concave, the object-side surface S3 of the second lens L2 is concave, and the image-side surface S4 of the second lens L2 is convex, the object-side surface S5 of the third lens L3 is concave, and the image-side surface S6 of the third lens L3 is convex.

[0072] The second group Q2 has positive refractive power, and the second group Q2 sequentially includes two fourth lenses L4 with positive r...

no. 2 example

[0085] For a structural schematic diagram of a wide-angle lens 200 provided in this embodiment, please refer to Image 6 . The wide-angle lens 200 in this embodiment is roughly the same as the wide-angle lens 100 in the first embodiment, except that the paraxial position of the image-side surface S11 of the second lens L2 of the first group Q1 of the wide-angle lens 200 in this embodiment is The fifth lens L5 of the second group Q2 is a glass spherical lens, the image-side surface S13 of the seventh lens L7 of the third group Q3 is a convex surface, and the curvature radius and material selection of each lens are different.

[0086] See Table 3 for lens-related parameters of each lens in the wide-angle lens 200 provided in this embodiment.

[0087] table 3

[0088]

[0089]

[0090] The parameters of each lens aspheric surface in this embodiment are shown in Table 4.

[0091] Table 4

[0092]

[0093] In this embodiment, its field curvature, distortion, axial chro...

no. 3 example

[0095] For a structural schematic diagram of a wide-angle lens 300 provided in this embodiment, please refer to Figure 11 . The wide-angle lens 300 in this embodiment is roughly the same as the wide-angle lens 100 in the first embodiment, the difference is that: the object-side surface S3 of the second lens L2 of the first group Q1 of the wide-angle lens 300 in this embodiment is a convex surface, The object-side surface S5 of the third lens L3 is convex, and the image-side surface S6 of the third lens L3 is concave, the third lens L3 has negative refractive power, and the object-side surface S7 of the fourth lens L4 of the second group Q2 is a concave surface, the fifth lens L5 is a glass spherical lens, and the object-side surface S9 of the fifth lens L5 is a concave surface, the sixth lens L6 of the third group Q3 has positive refractive power, and the object-side surface S11 of the sixth lens L6 and the image-side surface S12-1 of the sixth lens L6 are convex, the sevent...

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Abstract

The invention provides a wide-angle lens and imaging equipment. A first group sequentially comprises a first lens, a second lens and a third lens from an object side to an imaging surface, wherein thefirst lens has a negative focal power, the second lens has a negative focal power, the third lens has a focal power, an object side surface of the first lens is a convex surface, an image side surface of the first lens is a concave surface, an image side surface of the second lens is a concave surface, a second group sequentially comprises a fourth lens and a fifth lens, the fourth lens has a positive focal power, the fifth lens has a positive focal power, image side surfaces of the fourth lens and the fifth lens both are convex surfaces, a third group sequentially comprises a sixth lens, a seventh lens and an eighth lens, the eighth lens has a positive focal power, an object side surface and an image side surface of the eighth lens both are convex surfaces, the sixth lens and the seventhlens are combined to form a bonding body, a diaphragm is arranged between the first group and the second group, and an optical filter is arranged between the third group and an imaging surface. The wide-angle lens provided by the invention has the advantages of small distortion, high pixel, large visual field angle and low tolerance sensitivity.

Description

technical field [0001] The invention relates to the technical field of lens imaging, in particular to a wide-angle lens and imaging equipment. Background technique [0002] With the development of optical lens imaging technology, wide-angle lenses have achieved rapid development. However, due to the large f-θ distortion commonly found in current wide-angle imaging lenses, and the large incident angle of light, it is difficult to correct marginal aberrations. Tolerance sensitive, low assembly yield. Based on this, an optical imaging system with small distortion, high pixels, and large wide-angle is designed. At the same time, through the control of the lens structure, the assembly yield can be effectively improved. Contents of the invention [0003] The object of the present invention is to provide a wide-angle lens and an imaging device, which have the advantages of small distortion, high pixels, large viewing angle, and low tolerance sensitivity. [0004] Embodiments of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/06G02B13/00G02B13/18G02B1/00
CPCG02B1/00G02B13/0045G02B13/06G02B13/18
Inventor 魏文哲刘绪明曾吉勇
Owner 合肥联创光学有限公司
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