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Rotation-based large-breadth optical imaging method

An imaging method and technology of an optical imaging system, which are applied in the field of large-width optical imaging based on rotation, can solve the problem that the satellite imaging system is difficult to take into account the resolution and the width, and achieve the effect of taking into account the width and the resolution.

Active Publication Date: 2017-09-15
SHANGHAI ENG CENT FOR MICROSATELLITES
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Problems solved by technology

[0003] The problem solved by the present invention is that the existing satellite imaging system is difficult to take into account both resolution and width. In order to solve the problem, the present invention provides a large-width optical imaging method based on rotation

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  • Rotation-based large-breadth optical imaging method

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no. 1 example

[0025] Such as figure 1 As shown, in this embodiment, an imaging camera is used, and the imaging camera is directly connected to the satellite platform, and the satellite platform is connected to the sailboard. The format size of a single camera imaging sub-satellite points is A×B (the length in the direction through the orbit × the length in the direction along the orbit), the radius of the earth is R, the altitude of the satellite orbit is H, and the flight speed of the satellite is V. In order to achieve a width of For the large and wide observation requirements of L, the inclination angle between the boresight of the camera and the axis of the satellite to the earth is required to be:

[0026] In order to ensure that the imaging coverage area is complete, the imaging camera is required to rotate a circle, and the forward distance of the satellite cannot be greater than B, because only one camera is used for rotational imaging, and the satellite rotation speed cannot be l...

no. 2 example

[0028] Such as figure 2 As shown, the imaging camera includes a first camera 1 and a second camera 2, and the imaging camera is an area scan camera. When two cameras are used, the two cameras are installed symmetrically, the plane where the boresight of the cameras is located is parallel to the earth axis of the satellite, and the included angle between the boresight of the camera and the earth axis of the satellite is

[0029]

[0030] In other embodiments of the present invention, the number of imaging cameras and installation parameters can also be adaptively modified according to application requirements. The imaging cameras can be set as two symmetrical cameras, three cameras distributed in an equilateral triangle, non- Several cameras that evenly deflect in the same direction, etc., the core is that the camera boresight is installed at a certain angle to the star’s axis of the earth, and the circular or fan-shaped area is covered by the 360-degree rotation of the rot...

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Abstract

The invention provides a rotation-based large-breadth optical imaging system imaging method comprising the steps that step one, the inclined angle of the imaging camera visual axis and the satellite to-the-ground axis is configured to be greater than 0 degree, and an imaging camera uniformly rotates around the satellite to-the-ground axis; step two, the imaging camera is arranged at the initial position and performs imaging for one time; the imaging camera rotates for an angle and then performs imaging after stabilization, and an overlap area exists between the two times of imaging; and the imaging camera repeatedly rotates for an angle and then performs imaging after stabilization; step three, 360-degree rotation is completed, and the imaging camera performs imaging for one time so as to ensure the overlap area with the imaging area of the initial position; and step four, the steps two and three are repeated until the satellite leaves the area over the observation area.

Description

technical field [0001] The invention relates to the technical field of optical remote sensing imaging, in particular to a large-width optical imaging method based on rotation. Background technique [0002] The development trend of optical remote sensing satellites is large width and high resolution. The existing satellite imaging system achieves the shooting width through the swing of the imaging camera, so the resolution and the width of the existing satellite imaging system are two indicators that are difficult to take into account. The cooperation of large-scale detectors greatly increases the difficulty of payload design, which is not conducive to the cost control and miniaturization of satellites. The main advantage of the solution proposed by the present invention is that it avoids the use of ultra-large-scale detectors and reduces the design difficulty of a camera with a large field of view. Contents of the invention [0003] The problem solved by the invention is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B37/02G03B37/04G01C11/02
CPCG03B37/02G03B37/04G01C11/02
Inventor 尹增山高爽李华李平付
Owner SHANGHAI ENG CENT FOR MICROSATELLITES
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