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Method and device for presetting focal plane in vacuum for space camera

A camera and focal plane technology, applied in the optical field, can solve the problems of increasing the quality of the camera and reducing the reliability of the aerospace camera on-orbit, and achieves the effects of good reliability, reliable test guarantee, and wide application range.

Inactive Publication Date: 2012-09-19
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

For aerospace cameras, it is not advisable to increase camera quality to ensure image quality; in addition, the placement of this focusing mechanism will greatly reduce the reliability of aerospace cameras in orbit

Method used

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  • Method and device for presetting focal plane in vacuum for space camera
  • Method and device for presetting focal plane in vacuum for space camera
  • Method and device for presetting focal plane in vacuum for space camera

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Embodiment Construction

[0023] The invention provides a method for presetting the focal plane in a vacuum of an aerospace camera. The method combines the principle of vacuum imaging to solve the problem of defocusing of the focal plane of the aerospace camera after it is launched into the sky, and ensures that the aerospace camera can image clearly after it is launched into the sky.

[0024] The working principle of the present invention is:

[0025] 1) Obtain the optical transfer function MTF of the camera under test in a non-vacuum state;

[0026] 2) Obtain the optical transfer function MTF of the camera under test in a vacuum state;

[0027] 3) Assign the value of the optical transfer function MTF in the non-vacuum state obtained in step 1) to the value of the optical transfer function MTF in the vacuum state; The value of the optical transfer function MTF is infinitely close to or equal to the value of the optical transfer function MTF in the non-vacuum state obtained in step 1).

[0028] If on...

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Abstract

The invention relates to a method and device for presetting a focal plane in vacuum for a space camera. The presetting method comprises the following steps of: 1) acquiring an optical transfer function MTF (modulation transfer function) of a camera to be tested in a non-vacuum state; 2) acquiring an optical transfer function MTF of the camera to be tested in a vacuum state; and 3) giving value of the optical transfer function MTF in the non-vacuum state to the value of the optical transfer function MTF in the vacuum state, thus presetting of the focal plane of the camera to be tested in vacuum is completed. The invention provides a method and device for presetting the focal plane in vacuum for the space camera, which can effectively preset the focal plane of the space camera on ground and can guarantee the space camera to image clearly after the space camera is launched to the sky by combining a vacuum imaging principle.

Description

technical field [0001] The invention belongs to the field of optics, and relates to a method and device for presetting the focal plane of an aerospace camera in a vacuum, in particular to an aerospace camera used to preset the focal plane of the aerospace camera on the ground after it is launched into the sky, so as to ensure that the focal plane of the aerospace camera A method and device for presetting the focal plane in a vacuum for the purpose of clear imaging after heaven. Background technique [0002] At present, after many aerospace optical payloads are launched into the sky, the focal plane will deviate from the original position calibrated on the ground, which will directly reduce its transfer function and affect the imaging quality. The optical systems designed in the development of various aerospace cameras are designed according to the vacuum working conditions, and the actual optical-mechanical assembly and testing are all completed in the ground ambient air. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C11/02
Inventor 徐亮赵建科周艳薛勋刘峰胡丹丹张洁昌明
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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