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Focal plane adjustment method for off-axis three-lens camera

An off-axis three-mirror and camera technology, applied in the field of aerospace optics, can solve problems such as difficult assembly methods, and achieve the effect of improving assembly efficiency

Active Publication Date: 2014-06-18
BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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Problems solved by technology

For the off-axis three-mirror system, there is a certain inclination angle between the focal plane position and the installation plane, so that the above three assembly requirements are interrelated. The assembly method is difficult to meet, and the three requirements need to be considered as a whole when assembling

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  • Focal plane adjustment method for off-axis three-lens camera

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Embodiment Construction

[0026] The basic thought of the present invention is: utilize the method of coordinate conversion to convert the coordinate system of the satellite into the coordinate system of the collimator, realize the real-time adjustment of the angle relationship between the camera and the satellite. In addition, the simulation analysis and coordinate rotation of the actual position of the camera focal plane gasket are carried out to realize the high-precision focal plane adjustment of the off-axis three-mirror camera.

[0027] Such as figure 1 Shown: the implementation steps of the technical scheme adopted by the method for adjusting the focal plane of an off-axis three-mirror camera in the present invention are completed by the cooperation of the reference conversion stage and the simulation-assisted adjustment stage. The implementation steps of the reference conversion stage are as follows:

[0028] Step (1) as figure 2 As shown, 1 represents the three-mirror off-axis camera, 2 rep...

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Abstract

The invention belongs to the technical field of aerospace optical remote sensors, and relates to a focal plane adjustment method for an off-axis three-lens camera. The off-axis three-lens camera has strict requirements on focal adjustment, the infinite coplanar performance of each visual field of the focal plane of the camera needs to be guaranteed, the two ends of a CCD device in an focal plane assembly of the camera need to be guaranteed to be on the same horizontal plane, and the center of the CCD device of the camera and a satellite reference need to be guaranteed to be within the error range. Especially for an off-axis three-lens system, a certain inclination angle exists between the position of the imaging CCD device and the mounting plane of the focal plane, when adjustment is performed on the above assembling requirement, and results of the other two indexes also change correspondingly, so that the above requirement is more difficult to meet. The invention provides a method for directing focal plane adjustment through simulation estimation, and elaborates crucial techniques in the method, and the method is verified on the off-axis three-lens camera, so that the high-precision assembling requirement of the focal plane of the camera is met.

Description

technical field [0001] The invention belongs to the technical field of aerospace optical remote sensors, and relates to a method for adjusting the focal plane of an off-axis three-mirror camera, which is applied to aerospace optics. Background technique [0002] With the development of science and technology, the resolution requirements of aerospace remote sensing mapping cameras are getting higher and higher, and its field of view is also expected to be as wide as possible. Since the large-aperture refractive and catadioptric optical systems need to use special optical materials or complex structures to eliminate the secondary spectrum, their applications are limited. The reflective optical system is suitable for wide-spectrum imaging because it does not produce chromatic aberration; the optical path can be folded, which is convenient for shortening the length of the tube and making the structure compact; each reflective surface can be aspherical, which is beneficial to imp...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B43/00G01C11/02
Inventor 马丽娜张继友蔡伟军王东杰
Owner BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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