High-resolution imaging camera for large-F-number diffraction real-time correction based on pixel coding

A technology of pixel coding and real-time correction, applied in image data processing, graphics and image conversion, instruments, etc.

Pending Publication Date: 2021-09-14
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing traditional imaging camera needs to adopt a long focal length and a large aper

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  • High-resolution imaging camera for large-F-number diffraction real-time correction based on pixel coding
  • High-resolution imaging camera for large-F-number diffraction real-time correction based on pixel coding
  • High-resolution imaging camera for large-F-number diffraction real-time correction based on pixel coding

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Embodiment Construction

[0037] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention.

[0038] The present invention proposes a high-resolution imaging camera with real-time correction of large F-number diffraction based on pixel coding. The imaging camera uses the design concept of large F-number and large Q-value, and the diffraction phenomenon of the optical system with large F-number (F-number > 20) is obvious. At the same Nyquist frequency, the MTF (MTF1.5); the imaging camera uses a system-based PSF The pixel encoding algorithm for the operation core can make up for the MTF drop and image degradation caused by the large F number. By directly constructing the system encoding matrix in the airspace, the correspo...

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Abstract

The invention provides a high-resolution imaging camera for large-F-number diffraction real-time correction based on pixel coding. The high-resolution imaging camera solves the problem that an existing traditional imaging camera needs to adopt a long focal length and a large aperture to achieve high-resolution imaging. The high-resolution imaging camera comprises an imaging lens, a detector and a data processing module, the imaging lens is a large-F-number and large-Q-value imaging lens and is used for collecting imaging light of a measured target; the detector is a low-noise detector and is used for converting the imaging light acquired by the imaging lens into an image; the data processing module comprises a computer program, a pixel coding algorithm is realized when the computer program is executed, and diffraction real-time correction is performed by using the pixel coding algorithm to obtain a high-resolution image; the large-F-number imaging camera is small in aperture, the equivalent Nyquist MTF is low (the F number is 25, and the MTF is about 0.02), the resolution is improved by introducing a pixel coding algorithm, and the large-F-number imaging camera has the advantages of being small in aperture, long in focal length, high in resolution, light in weight, high in image quality and the like.

Description

technical field [0001] The present invention relates to a high-resolution visible light imaging camera with a large F-number, in particular to a high-resolution imaging camera based on pixel-coded large-F-number diffraction real-time correction, which is suitable for clear imaging of space objects and can meet the spatial resolution of 0.3m@300km application requirements. Background technique [0002] Realizing high-resolution imaging in the field of photoelectric detection imaging has always been an important research and exploration direction, especially in the fields of aerospace, remote sensing, and target recognition. According to the Rayleigh criterion, the angular resolution of traditional optical imaging systems is mainly limited by the wavelength λ of the light wave and the size D of the primary mirror. Under a specific working wavelength, the main means to improve the resolution of the imaging system can only be by increasing the aperture of the primary mirror. H...

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Application Information

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IPC IPC(8): G06T3/40
CPCG06T3/4053
Inventor 单秋莎周亮刘朝晖黄静
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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