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Optical imaging lens and imaging equipment

An optical imaging lens and imaging surface technology, applied in the field of imaging lenses, can solve the problems of high manufacturing cost and poor market competitiveness, and achieve the effects of low cost, correction of thermal focal shift, and weight reduction of the lens

Active Publication Date: 2021-03-16
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, most of the existing small-field-of-view car cameras use an all-glass structure. In order to correct distortion and system aberration, 5 to 7 lenses are usually used, which leads to high manufacturing costs and poor market competitiveness.

Method used

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  • Optical imaging lens and imaging equipment
  • Optical imaging lens and imaging equipment
  • Optical imaging lens and imaging equipment

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0054] see figure 1 , which is a schematic structural view of the optical imaging lens 100 provided in the first embodiment of the present invention, the optical imaging lens 100 includes in sequence from the object side to the imaging surface along the optical axis: a first lens L1, a second lens L2, and a stop ST , the third lens L3, the fourth lens L4, the filter G1 and the imaging surface S11.

[0055] Wherein, the first lens L1 has negative refractive power, the object side S1 of the first lens L1 is a concave surface, and the image side S2 of the first lens L1 is a concave surface;

[0056] The second lens L2 has positive refractive power, the object side S3 of the second lens L2 is a convex surface, and the image side S4 of the second lens L2 is a convex surface;

[0057] The third lens L3 has positive refractive power, the object side S5 of the third lens L3 is a convex surface, and the image side S6 of the third lens L3 is a convex surface;

[0058] The fourth lens ...

no. 2 example

[0071] The structure of the optical imaging lens provided by the second embodiment of the present invention is substantially the same as that of the optical imaging lens 100 in the first embodiment, except that the relevant parameters such as the radius of curvature, thickness, and material of each lens are different.

[0072] The relevant parameters such as the radius of curvature, thickness, and material of each lens of the optical imaging lens in this embodiment are shown in Table 3.

[0073] table 3

[0074]

[0075] The surface coefficients of each aspheric surface of the optical imaging lens in this embodiment are shown in Table 4.

[0076] Table 4

[0077]

[0078] see Figure 4 , shows the field curvature curve of the optical imaging lens in this embodiment. It can be seen from the figure that the field curvature of the meridian image plane and the sagittal image plane is controlled within ±0.12mm, indicating that the field curvature correction of the optical ...

no. 3 example

[0081] The structure of the optical imaging lens provided by the third embodiment of the present invention is substantially the same as that of the optical imaging lens 100 in the first embodiment, except that the curvature radius, thickness, material and other related parameters of each lens are different.

[0082] The relevant parameters such as the radius of curvature, thickness, and material of each lens of the optical imaging lens in this embodiment are shown in Table 5.

[0083] table 5

[0084]

[0085] The surface coefficients of each aspheric surface of the optical imaging lens in this embodiment are shown in Table 6.

[0086] Table 6

[0087]

[0088] see Image 6 , shows the field curvature curve of the optical imaging lens in this embodiment. It can be seen from the figure that the field curvature of the meridian image plane and the sagittal image plane is controlled within ±0.06mm, indicating that the field curvature correction of the optical imaging lens...

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Abstract

The invention discloses an optical imaging lens. The optical imaging lens sequentially comprises: a first lens with negative refractive power from the object side to the imaging surface along the optical axis, and the object side and the image side of the first lens are both concave surfaces. There is a second lens with positive refractive power, the object side and image side of the second lens are convex; stop; the third lens with positive refractive power, the object side and image side of the third lens are both Convex surface; a fourth lens with negative refractive power, the object side of the fourth lens is concave, and the image side is convex at the near optical axis; wherein the first lens and the third lens are glass lenses, the The second lens and the fourth lens are plastic aspherical lenses. The optical imaging lens provided by the present invention adopts four glass-plastic hybrid lenses to match, through the reasonable control of each surface type, and the reasonable combination of materials and focal power, it can realize clear imaging, and can meet high requirements while controlling low-cost manufacturing. Resolution imaging quality requirements.

Description

technical field [0001] The invention relates to the technical field of imaging lenses, in particular to an optical imaging lens and imaging equipment. Background technique [0002] At present, with the development of automatic driving systems, countries around the world have successively promulgated relevant policies to promote the development of automatic driving, which has greatly promoted the development of related industries of automatic driving. With the development of the industry, the requirements for the lens are getting higher and higher. [0003] In some occasions, the on-board camera is required to have higher detail resolution in a small field of view to identify distant objects and road signs, etc., and also puts forward requirements on the production cost of the lens and the performance of anti-environmental interference. However, most of the existing small-field-of-view vehicle cameras use an all-glass structure. In order to correct distortion and system aber...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18G02B7/02G02B1/04G02B1/00
CPCG02B1/00G02B1/041G02B7/028G02B13/004G02B13/06G02B13/18
Inventor 尚博文鲍宇旻曾吉勇
Owner 合肥联创光学有限公司
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