Aspheric surface introduced large-view-field staring type imaging system and imaging method thereof

Abstract

The invention discloses an aspheric surface introduced large-field-of-view staring type imaging system, and an imaging method thereof. A multi-aperture field-of-view structure is adopted, the system comprises a front objective lens system and a rear relay image inversion arrangement system, all aperture channels are imaged independently, and a full-field-of-view high-resolution image is obtained after fusion and splicing. According to the invention, the front objective lens adopts a concentric symmetrical structure to obtain a two-dimensional intermediate image with uniform imaging performancein an ultra-large field of view; a rear image inversion system subdivides a two-dimensional intermediate image, and particularly, aspheric relay imaging is adopted, so that residual aberration can befurther finely corrected. According to the invention, the characteristics of large field of view of the symmetric concentric objective lens and strong aberration correction capability of the asphericrelay imaging system are fully utilized, on the premise of meeting large-field-of-view staring imaging, the full-field-of-view aberration is better controlled, and high-resolution large-field-of-viewstaring imaging is achieved.

Description

technical field [0001] The present invention relates to a staring imaging system and its imaging method for quickly acquiring high-resolution images within a large field of view, in particular to a cascaded, large-field staring imaging system using a multi-aperture split-field structure and its imaging method. Background technique [0002] In recent years, with the popularity of UAV applications, airborne wide-field-of-view and high-resolution imaging technology has broad application requirements in fields such as precision agriculture, forestry resource investigation, and mineral exploration. However, wide-field and high-resolution optical The system needs to have a large field of view and a large aperture at the same time, and the geometric aberration increases sharply with the increase of the field of view and aperture of the optical system. The traditional optical system cannot meet the imaging requirements of wide field of view and high resolution at the same time. [...

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Problems solved by technology

[0002] In recent years, with the popularity of UAV applications, airborne wide-field-of-view and high-resolution imaging technology has broad application requirements in fields such as precision agriculture, forestry resource investigation, and mineral exploration. However, wide-field and high-resolution optical The system needs to have a large field of view and a large aperture at the same time, and the geometric aberration increases sharply with the increase of the field of view and aperture of the optical system. The traditional optical system cannot simultaneously meet the imaging requirements of wide field of view and high resolution.

[0003] Due to the limitation of the pixel resolution on the ground, the imaging field of view of traditional airborne cameras is usually small, which cannot meet the application requirements of large field of view and high operating efficiency. direction of effort

[0004] Before the present invention was made, the Chinese invention patent CN104034420B disclosed a spectral imaging system, but its imaging resolution was low, and when it was applied to an imaging system, it could not meet the high resolution requirement

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