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An uncooled infrared catadioptric panoramic lens

A catadioptric panoramic and uncooled infrared technology, applied in the field of infrared optics, can solve the problems of large amount of original image data, geometric distortion, and low time resolution, and achieve the effect of simple structure, simple structure, and small field of view

Active Publication Date: 2019-09-27
云海桥(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are usually three ways to obtain panoramic images: the first is to rotate around a fixed viewpoint and shoot a series of image sequences with partially overlapping fields of view, and then perform image stitching on these image sequences to finally obtain a 360° horizontal field of view The advantage of this type of panoramic imaging technology is that it has high spatial resolution, but its disadvantage is that it has low temporal resolution and cannot fully record the occurrence, continuation, and end of the entire process of important events in the 360° omnidirectional real scene space.
The second is to use multiple cameras to image the object space area with different azimuth angles, and then form a panoramic image through image stitching; The algorithm is complex, there are stitching seams, there are light and dark differences between the images captured by cameras with different azimuth angles, and the positioning requirements between the cameras are relatively strict
The third is a single detector with a special panoramic optical system to obtain a panoramic image. Representative panoramic optical systems include: fisheye lens, panoramic annular lens and catadioptric panoramic lens. The advantage of this panoramic imaging method is that it does not require scanning components. The panoramic image can be obtained at one time, and the speed is fast. The disadvantage is that the spatial resolution is low and the geometric distortion is serious.

Method used

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  • An uncooled infrared catadioptric panoramic lens
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  • An uncooled infrared catadioptric panoramic lens

Examples

Experimental program
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Effect test

Embodiment 1

[0038] For an uncooled infrared vanadium oxide focal plane detector with a pixel size of 640×512, a pixel center distance of 17 μm, and a working band of 8 μm to 12 μm, a catadioptric infrared panorama with F# of 1, an equivalent focal length of 3 mm, and a working band of 8 μm to 12 μm is designed Lens, the specific performance parameters are:

[0039] (1) Equivalent focal length: 3mm

[0040] (2) F#: 1

[0041] (3) Infrared imaging band range: 8μm~12μm

[0042] (4) Horizontal field of view: 360°

[0043] (5) Vertical field of view during infrared imaging: -70°~+5°

[0044] (6) Infrared imaging MTF:>40%@20lp / mm

[0045] (7) Optical system average transmittance: 88%

[0046] The surface parameters of the optical element designed in Example 1 are shown in Table 1.

[0047] The optical element surface parameter of table 1 embodiment 1

[0048]

[0049]

[0050] The third-order aberrations of each surface of the optical element designed in Table 1 are shown in Table 2....

Embodiment 2

[0055] For an uncooled infrared vanadium oxide focal plane detector with a pixel size of 640×512, a pixel center distance of 17 μm, a working band of 8 μm to 12 μm, and a peak wavelength of 10 μm, the design F# is 1, the equivalent focal length is 4.2 mm, and the working band is 8 μm to 12 μm The catadioptric infrared panoramic lens, the specific performance parameters are:

[0056] (1) Equivalent focal length: 4.2mm

[0057] (2) F#: 1

[0058] (3) Infrared imaging band range: 8μm~12μm

[0059] (4) Horizontal field of view: 360°

[0060] (5) Vertical field of view during infrared imaging: -70°~+5°

[0061] (6) Infrared imaging MTF:>55%@20lp / mm

[0062] (7) Optical system average transmittance: 88%

[0063] The surface parameters of the optical element designed in Example 2 are shown in Table 3.

[0064] The optical element surface parameter of table 3 embodiment 2

[0065]

[0066]

[0067] The tertiary aberrations of each surface of the optical element designed i...

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Abstract

The present invention provides an un-cooled infrared refraction and reflection panoramic lens. The un-cooled infrared refraction and reflection panoramic lens comprises a quadratic surface reflector and a lens group; the quadratic surface reflector and the lens group share the same optical axis; the lens group is below the quadratic surface reflector; the lens group is composed of a first refracting mirror, a second refracting mirror and a third refracting mirror, wherein the first refracting mirror and the second refracting mirror constitute a symmetrical double-Gaussian structure, and the second refracting mirror and the third refracting mirror are aspherical refracting mirrors; and a light transmission path is formed between the quadratic surface reflector, the first refracting mirror, the second refracting mirror and the third refracting mirror. The panoramic lens is suitable for an un-cooled infrared focal plane detector. The panoramic lens has the advantages of large field of view, small size and the like.

Description

technical field [0001] The invention belongs to the technical field of infrared optics, and in particular relates to an uncooled infrared catadioptric panoramic lens. Background technique [0002] The traditional imaging system takes a point in the field of view as the imaging center point, and projects a limited area of ​​the object space onto the imaging plane through the center point, imaging a part of the object space, and obtains a limited amount of information. [0003] Panoramic imaging refers to the imaging technology whose field of view exceeds the normal field of view of humans, and can obtain 360° horizontal field of view and large vertical field of view information. The amount of information is larger. With the increase of the pixel size of imaging devices, panoramic imaging has gradually gained more attention, and has become a research hotspot in emerging fields such as machine vision and computer vision. [0004] There are usually three ways to obtain panorami...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/06G02B13/04G02B13/14G02B13/18
Inventor 王岭雪贺宇姜杰刘福平蔡毅刘建红陈骥李洪兵罗永芳
Owner 云海桥(北京)科技有限公司
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