Long-wave infrared lens and infrared vehicle-mounted night vision system

A technology of long-wave infrared and lens, applied in the field of optical lens

Pending Publication Date: 2021-05-07
NINGBO SUNNY INFRARED TECH COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] According to the data of the famous energy consulting company HIS in January 2020, the global light vehicle market capacity will reach 85 million sets in 2020 and 97 million sets in 2023. use on

Method used

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  • Long-wave infrared lens and infrared vehicle-mounted night vision system
  • Long-wave infrared lens and infrared vehicle-mounted night vision system
  • Long-wave infrared lens and infrared vehicle-mounted night vision system

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Experimental program
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Embodiment 1

[0053] First, go ahead and refer to figure 1 The long-wave infrared lens in the first embodiment also includes a first lens 11, a second lens 12, and a third lens 13 arranged in sequence along the optical axis from the object side to the image side, and the first lens 11 has a convex surface facing the object side. A meniscus lens with positive refractive power; the second lens 12 is a lens with a negative refractive power with a concave surface facing the object side; the third lens 13 is a lens with a positive refractive power with a convex surface facing the object side; the long-wave infrared lens satisfies the following expression: 1.2< f*(n-1) / (FNO*R1)<2.39; wherein, f is the focal length of the long-wave infrared lens; FNO is the F number of the long-wave infrared lens; n is the central wavelength refractive index of the first lens 11; R1 is the first lens 11 The radius of curvature of the convex surface of a lens 11.

[0054] In the first embodiment, the field angle o...

Embodiment 2

[0069] Figure 11 It is a schematic structural diagram of another long-wave infrared lens provided in Embodiment 2 of the present invention, refer to Figure 11 , the field angle of the long-wave infrared lens of the second embodiment is 30°. Wherein, the object-side surfaces and image-side surfaces of the first lens 11 and the second lens 12 are both spherical surfaces. The object-side surface of the third lens 13 is a binary diffraction surface, and the image-side surface is an aspheric surface. Specifically, Table 4 is the optical data parameters of the long-wave infrared lens provided in the second embodiment, Table 5 is the binary diffraction surface and the aspherical data of the aspheric surface of the long-wave infrared lens provided in the second embodiment, and Table 6 is the data of the aspheric surface of the long-wave infrared lens provided in the second embodiment. Two provides the binary surface data of the binary diffraction surface of the LWIR lens.

[0070...

Embodiment 3

[0078] Figure 21 It is a schematic structural diagram of another long-wave infrared lens provided in Embodiment 3 of the present invention, refer to Figure 21 , the field angle of the long-wave infrared lens of the third embodiment is 40°. Wherein, the object-side surfaces and image-side surfaces of the first lens 11 and the second lens 12 are both spherical surfaces. The object-side surface of the third lens 13 is a binary diffraction surface, and the image-side surface is an aspheric surface. Specifically, in this embodiment, the focal length of the long-wave infrared lens is f=11mm, the aperture number FNO=1.2, and the maximum field of view 2ω=51.4°; the convex curvature radius R1 of the first lens 11=11.03mm, and the first lens 11 Focal length f1=41.079mm, the focal length f2=-11.955mm of the second lens 12, the focal length f3=7.464mm of the third lens 13; f*(n-1) / (FNO*R1)=2.01; f1 / f=3.73 ; f2 / f=-1.09; f3 / f=0.68.

[0079] Specifically, Table 7 is the optical data pa...

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Abstract

The embodiment of the invention discloses a long-wave infrared lens and an infrared vehicle-mounted night vision system. The long-wave infrared lens comprises a first lens, a second lens and a third lens which are sequentially arranged from an object side to an image side along an optical axis, wherein the first lens is a meniscus lens with positive refractive power, and the convex surface of the first lens faces the object side; the concave surface of the second lens faces the object side, and the second lens has negative refractive power; the convex surface of the third lens faces the object side, and the third lens has positive refractive power; the long-wave infrared lens satisfies the following expression: 1.2<f*(n-1) / (FNO*R1)<2.39. According to the embodiment of the invention, through the combination of the silicon glass, the chalcogenide glass and the three lenses, the optical design of the low-cost vehicle-mounted night vision lens is realized, the system aberration can be well corrected, the number of the system lenses can be reduced, and the low cost of the lens is remarkably improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of optical lenses, and in particular to a long-wave infrared lens and an infrared vehicle-mounted night vision system. Background technique [0002] With the maturity of infrared uncooled detector technology, uncooled thermal imaging cameras have been widely used in various fields, one of which is a very important field is the infrared vehicle night vision system. Because the principle of infrared imaging is different from that of visible light imaging, infrared thermal imaging uses the thermal radiation of natural objects to form images, which enables infrared night vision systems to observe distances 3 to 5 times farther than ordinary car headlights, and can even Reach more than 10 times the distance. It can make it possible to use the infrared vehicle-mounted night vision system to observe the road conditions ahead very clearly under severe weather conditions such as heavy fog, heav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18G02B13/16G02B13/14
CPCG02B13/0015G02B13/0035G02B13/008G02B13/16
Inventor 朱光春刘画池熊志成李耀刘宁张敏
Owner NINGBO SUNNY INFRARED TECH COMPANY
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