Optical registration method and system for LFOV (large field of view) and small-F-number line-surface combined remote sensing camera

Abstract

The invention discloses an optical registration method and system for an LFOV (large field of view) and small-F-number line-surface combined remote sensing camera. The method comprises steps as follows: connecting a to-be-registered camera body and a table board of a two-dimensional turntable; step S200: determining the best focal plane position of a linear array channel and a surface array channel of a camera; establishing a light path for registration; making sure that reflecting light can fill a full aperture of a camera lens; drawing an orthogonal reticle cross on a screen of a display, and enabling a reticle cross target to be focused to and imaged in the center of the display; making a pixel of a linear array CCD parallel to the horizontal line of the reticle cross of the display; making a first row of pixels of a surface array CCD parallel to the horizontal line of the reticle cross of the display; aligning the Xth row of pixels of the surface array CCD parallel to the reticle cross of the display; verifying whether the Xth row of pixels of the surface array CCD are aligned to the horizontal line of the reticle cross of the display. The problems about high-accuracy system integration and linear array-surface array optical registration of an LFOV, small-F-number, light and small remote sensing camera are solved once.

Description

technical field [0001] The invention belongs to the technical field of aerospace optical remote sensors, and in particular relates to a remote sensing camera optical registration method and system combining a large field of view and a small F-number line and surface. Background technique [0002] The combination of remote sensing images with different spectral bands and different dynamic ranges can obtain all-weather, multi-spectral, high dynamic range geometric and spectral information of the observed target. key technologies. [0003] Different CCD devices can meet different types of remote sensing observation needs, such as the combination of linear array multispectral CCD and linear array panchromatic CCD, the combination of linear array visible light CCD and linear array infrared CCD, and the combination of linear array CCD and area array CCD. optical remote sensing capabilities. Among them, the combination of linear array CCD and area array CCD is quite special. Sinc...

AI Technical Summary

Problems solved by technology

However, the small F number results in a very short depth of focus, and the required vacuum and temperature defocus are often an order of magnitude higher than the depth of focus, so it is very difficult to accurately focus

In addition, the larger field of view also brings great difficulties to precise focusing and registration

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