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super wide-angle lens

An ultra-wide-angle lens and lens technology, applied in the field of ultra-wide-angle lenses, can solve problems such as the inability to meet the use requirements, the total size of the ultra-wide-angle lens, and the non-confocal day and night, and achieve the effects of good temperature control, reduced processing difficulty, and high image quality.

Active Publication Date: 2020-10-09
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

[0003] Among the existing technologies, the currently used ultra-wide-angle lenses generally have defects such as overall length, small viewing angle, poor temperature control, low resolution quality, high cost, and out-of-focus day and night, which cannot meet the requirements of use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] see Figure 1a, which is a schematic structural view of the ultra-wide-angle lens in the first embodiment of the present invention, which includes a first lens 11 with negative refractive power, a second lens 12 with negative refractive power, and a negative lens with negative refractive power from the object side to the imaging surface. The third lens 13 of refractive power, the fourth lens 14 with positive refractive power, a diaphragm 15, the fifth lens 16 with positive refractive power, the sixth lens 17 with negative refractive power, the The seventh lens 18 , the eighth lens 19 with positive refractive power, a filter 20 and a cover glass 21 .

[0067] Wherein, the first lens 11 is a meniscus lens with a concave surface facing the imaging surface, the second lens 12 is a meniscus lens with a concave surface facing the imaging surface, the third lens 13 is a biconcave lens, and the second lens 12 is a meniscus lens with a concave surface facing the imaging surface. ...

Embodiment 2

[0105] see Figure 2a, shows a schematic structural diagram of the ultra-wide-angle lens in the second embodiment of the present invention. The lens structure in this embodiment is roughly the same as that in the first embodiment. The difference lies in: (1) the fourth lens 14 is a double Convex glass spherical lens; (2) the optical filter 20 among the present embodiment can be any one of the visible light filter and the infrared light filter, but the visible light filter and the infrared light filter selected by the present embodiment The thickness of the optical sheets is the same, and both are 0.3 mm.

[0106] Please refer to Table 2, which shows the relevant parameters of each lens of the super wide-angle lens in this embodiment.

[0107] Table 2:

[0108]

[0109] see Figure 2b and Figure 2c , shows the field curvature and distortion curve of the ultra-wide-angle lens in this embodiment, and it can be seen from the figure that the field curvature and distortion a...

Embodiment 3

[0111] see Figure 3a , shows a schematic diagram of the structure of the ultra-wide-angle lens in the third embodiment of the present invention. The structure of the lens in this embodiment is roughly the same as that in the first embodiment. The difference is that the optical filter 20 in this embodiment can be Any one of the visible light filter and the infrared light filter, but the thickness of the visible light filter and the infrared light filter selected in this embodiment are the same, and both are 0.3mm.

[0112] Please refer to Table 3, which shows the parameters related to each lens of the super wide-angle lens provided in this embodiment.

[0113] table 3:

[0114]

[0115] see Figure 3b and Figure 3c , shows the field curvature and distortion curve of the ultra-wide-angle lens in this embodiment, and it can be seen from the figure that the field curvature and distortion are well corrected. see Figure 3d and Figure 3e , shows the MTF curves of the ult...

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Abstract

The invention provides a bugeye lens, and the lens sequentially comprises from an object side to an imaging surface: a first lens which has the negative focal power and is a meniscus lens having a concave surface facing the imaging surface; a second lens which has the negative focal power, and is a meniscus lens having a concave surface facing the imaging surface; a third lens which has the negative focal power, and is a biconcave lens; a fourth lens which has the positive focal power, and is a lens having a convex surface facing the imaging surface; a diaphragm; a fifth lens which has the positive focal power and is a biconvex lens; a sixth lens which has the negative focal power, and is a double concave lens, wherein the fifth lens and the sixth lens form a glued lens; a seventh lens which has the positive focal power, and is a biconvex lens; and an eighth lens which has the positive focal power, and is a biconvex lens. The eight lenses are all glass spherical lenses. The lens provided by the invention employs the eight glass spherical lenses, and achieves the good temperature control and day and night confocal benefits through the reasonable combination of the focal powers of all lenses.

Description

technical field [0001] The invention relates to the technical field of optical lenses, in particular to a super wide-angle lens. Background technique [0002] In recent years, with the rapid development of the high-definition camera and surveillance industry, the demand for meeting record camera lenses and surveillance camera lenses is also increasing. However, both meeting record and camera surveillance require lenses to have ultra-wide shooting angles. been widely used. [0003] Among the existing technologies, the currently used ultra-wide-angle lenses generally have defects such as overall length, small viewing angle, poor temperature control, low resolution quality, high cost, and out-of-focus day and night, which cannot meet the requirements of use. Contents of the invention [0004] Based on this, the object of the present invention is to provide an ultra-wide-angle lens with good temperature control and confocal day and night. [0005] An ultra-wide-angle lens, f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/06G02B13/00
CPCG02B13/005G02B13/06
Inventor 高博李伟娜韩建曾吉勇
Owner 合肥联创光学有限公司