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Wide-angle lens and imaging equipment

A wide-angle lens and lens technology, applied in optical components, instruments, optics, etc., can solve the problems of low lens pixels, large lens volume, inability to distinguish object details in the distant view, etc., and achieve the effect of clear imaging, high pixels, and shared focal power

Active Publication Date: 2020-11-20
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

However, ordinary wide-angle lenses have disadvantages such as inability to distinguish the details of objects in the distant view, low pixel pixels, and large lens volume.

Method used

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  • Wide-angle lens and imaging equipment

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0088] see figure 2 , a kind of wide-angle lens 100 provided by the first embodiment of the present invention, from the object side to the imaging surface S16 sequentially includes: a first lens L1, a second lens L2, a third lens L3, a stop ST, a fourth lens L4, a fifth lens Lens L5, sixth lens L6, seventh lens L7, filter G1.

[0089] The first lens L1 has negative refractive power, the object side S1 of the first lens is convex, the image side S2 of the first lens is concave, and the first lens L1 is a glass aspherical lens.

[0090] The second lens L2 has positive refractive power, the object side S3 of the second lens is concave, the image side S4 of the second lens is convex, and the second lens L2 is a glass aspherical lens.

[0091] The third lens L3 has positive refractive power, the object side S5 of the third lens is convex, the image side S6 of the third lens is concave, and the third lens L3 is a glass spherical lens.

[0092] The fourth lens L4 has positive refr...

no. 2 example

[0104] see Figure 5 , is a schematic structural diagram of a wide-angle lens 200 provided in this embodiment. The wide-angle lens 200 among the present embodiment is roughly the same as the wide-angle lens 100 among the first embodiment, the difference is that the second lens L2 of the wide-angle lens 200 among the present embodiment is a negative power lens, and the image side S6 of the third lens It is a convex surface, the image side S8 of the fourth lens is concave, the seventh lens L7 is a positive power lens, and the radius of curvature and material selection of each lens are different. The relevant parameters of each lens are shown in Table 2-1.

[0105] table 2-1

[0106]

[0107] The parameters of each lens aspheric surface in this embodiment are shown in Table 2-2.

[0108] Table 2-2

[0109]

[0110] In this embodiment, its distortion and axial chromatic aberration are respectively as Image 6 , Figure 7 shown. Depend on Image 6 It can be seen that t...

no. 3 example

[0112] see Figure 8 , is a schematic structural diagram of a wide-angle lens 300 provided in this embodiment. The wide-angle lens 300 among the present embodiment is roughly the same as the wide-angle lens 100 among the first embodiment, the difference is that the second lens L2 of the wide-angle lens 300 among the present embodiment is a negative power lens, and the image side S6 of the third lens It is a convex surface, the image side S8 of the fourth lens is concave, and the seventh lens L7 is a positive power lens, and the radius of curvature and material selection of each lens are different. The relevant parameters of each lens are shown in Table 3-1.

[0113] Table 3-1

[0114]

[0115] The parameters of each lens aspheric surface in this embodiment are shown in Table 3-2.

[0116] Table 3-2

[0117]

[0118] In this embodiment, its distortion and axial chromatic aberration are respectively as Figure 9 , Figure 10 shown. Depend on Figure 9 It can be seen...

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Abstract

The invention provides a wide-angle lens, which is composed of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an optical filter in sequence from the object side to the imaging surface ; The first lens satisfies the following conditional formula: 1.5<r 1 / r 2 <2.5;-2<f 1 / f<‑1; 0<ω D / ω max <0.6; 2<L D / L max <3; r 1、 r 2 Denote the curvature radii of the object side and image side of the first lens, respectively, f 1 Indicates the focal length of the first lens, f indicates the focal length of the wide-angle lens, ω D Indicates the inclination angle at the edge aperture of the object side of the first lens, ω max Indicates the maximum inclination angle of the first lens in the full aperture on the object side, L D Indicates the radial length of the position of the inclination angle at the edge aperture of the object side of the first lens, L max Indicates the radial length of the position where the maximum inclination angle is located in the full aperture on the object side of the first lens. The wide-angle lens provided by the present invention has small volume, high pixels, and clearer imaging of distant objects. The present invention also provides an imaging device.

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] Wide-angle lenses are widely used in vehicle and monitoring fields. However, ordinary wide-angle lenses have disadvantages such as inability to distinguish the details of objects in the distant view, low pixel pixels, and large lens volume. [0003] With the development of vehicle lenses and surveillance lenses, the requirements for wide-angle lenses are increasing, and there is an urgent need to improve the above shortcomings. Contents of the invention [0004] Based on this, the object of the present invention is to provide a small-volume, high-pixel wide-angle lens and an imaging device that can image distant objects more clearly, which can distinguish distant objects and improve the resolution of the lens. [0005] The embodiment of the present invention achieves the above object through the follo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/06G02B13/18
CPCG02B13/06G02B13/0045
Inventor 魏文哲曾吉勇
Owner 合肥联创光学有限公司
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