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A Line Detector for Earth Remote Sensing with Constant Earth Element Resolution

A resolution and constant field element technology, applied in the field of in-line detectors, can solve the problems of two-channel index differences, image deformation processing inconsistency, etc., and achieve the effect of simplifying geometric correction algorithms, good market application prospects, and reducing geometric deformation

Active Publication Date: 2021-04-13
SHANGHAI AEROSPACE CONTROL TECH INST
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Problems solved by technology

In 2015, Nuctech Technology Co., Ltd. applied for a patent for "a rotating arc detector box for X-ray inspection equipment", such as Figure 8 , which can solve the problems of the difference between the two channel indicators, the inconsistency of image deformation processing, and the simplification of geometric correction.

Method used

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  • A Line Detector for Earth Remote Sensing with Constant Earth Element Resolution
  • A Line Detector for Earth Remote Sensing with Constant Earth Element Resolution
  • A Line Detector for Earth Remote Sensing with Constant Earth Element Resolution

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Embodiment Construction

[0030] A new type of linear array detector for earth remote sensing with constant earth element resolution can improve the problem of energy loss caused by using traditional area array detectors based on constant earth element resolution optical imaging. When push-broom imaging of traditional remote sensing satellite line array detectors, the optical image resolution has the problem of non-uniform resolution, such as figure 1 As shown, h is the flight height, and S is the resolution directly below the detector. Since the observation inclination angle θ at the edge of the field of view is greater than the observation inclination angle at the center of the field of view, the resolution S' of the edge field of view is worse than S. Optical imaging systems with constant-dimensional resolution such as figure 2 As shown, assuming that the width of the imaging system to the ground is D, the optical distance from the center of the optical system to the imaging area is L, the angle f...

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Abstract

A linear detector for earth remote sensing with constant earth element resolution, which is used to reduce the optical geometric deformation caused by the non-zero optical field of view and the curvature of the earth, so as to realize earth remote sensing with constant earth element resolution, which belongs to earth remote sensing Detector technology field. In the present invention, the detector crystal adopts an arc-shaped photolithography model, which can effectively solve the problem of the loss of collected light energy caused by the discretization of the arc-shaped imaging of the existing area array detector, and increase the light energy collection area, thereby improving the light collection of the detector. Ability; in the entire field of view, the wave aberration of the light waves received by the arc shaped detector is uniform, and the resolution is the same, which can effectively reduce the geometric deformation of the detector during remote sensing imaging, thereby simplifying the geometric correction algorithm and further improving remote sensing. Image processing speed.

Description

technical field [0001] The invention relates to a line array detector used for earth remote sensing with constant earth element resolution, and belongs to the technical field of earth remote sensing detectors. Background technique [0002] Space remote sensing satellites can timely obtain optical information such as global clouds, fog, haze, wind direction, water vapor, ice, snow, water and land boundaries, ground temperature, ocean surface temperature, soil temperature and humidity, typhoon, etc., so as to be used for global disaster prevention and mitigation. [0003] At present, the large-field-of-view remote sensing cameras used by satellites, whether they are line arrays or area arrays, have a common problem of uneven ground resolution in optical images due to the non-zero optical field of view and the existence of the curvature of the earth. The Visible / Infrared Radiometer (VIIRS) in the US SNPP satellite (PM Obit) has a sub-satellite point resolution of 400m, and a sc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C15/00
CPCG01C15/00
Inventor 刘玉娇李兴隆张少伟陈文
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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