Hyperspectral imaging system and method based on sparse aperture compressing calculation correlation

A technology of hyperspectral imaging and sparse aperture, which is applied in the field of hyperspectral imaging system based on sparse aperture compression calculation and correlation, can solve the problems of narrow spectral response range and low light transmittance, and achieves saving detection dimension and high spatial resolution. , the effect of real-time fast hyperspectral imaging

Active Publication Date: 2015-04-15
NAT SPACE SCI CENT CAS
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Problems solved by technology

[0008] The purpose of the present invention is to overcome defects such as low light transmittance and narrow spectral response range of hyperspectral imaging spectrometers in the prior art, thereby providing an imaging system and method with high spatial resolution

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  • Hyperspectral imaging system and method based on sparse aperture compressing calculation correlation
  • Hyperspectral imaging system and method based on sparse aperture compressing calculation correlation
  • Hyperspectral imaging system and method based on sparse aperture compressing calculation correlation

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[0036] The present invention will be further described now in conjunction with accompanying drawing.

[0037] Before describing the present invention in detail, the concepts involved in the present invention will be introduced first.

[0038] Correlative imaging, or ghost imaging (GI), refers to the ability to generate an image of an object on an optical path that does not contain an object, and is one of the frontiers and hotspots in the field of quantum optics in recent years. The concept of ghost imaging was first demonstrated using spatially entangled photon pairs generated by parametric down-conversion. Ordinary ghost imaging, in the object arm, there is an object, but it is detected by a barrel (single pixel) detector without spatial resolution, in the reference arm, there is no object, but a spatially resolved detector is used at the same optical path as the object The detector with the ability detects the changing light field information, and the image can be obtained...

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Abstract

The invention relates to a hyperspectral imaging system and method based on sparse aperture compressing calculation correlation. The system comprises a sparse aperture unit, a free space collimation unit, a light beam reflecting unit, a beam spot combining unit, a mapping lens, a random optical modulation unit, a light expanding beam collimation unit, a spectrum light splitting unit, a convergence light collecting unit, an array light detector and a compressing calculation correlation module. Light signals on all light paths are respectively projected to the beam spot combining lens, a sparse aperture direct image is mapped to the random optical modulation unit, a sparse aperture imagining light field is modulated at random, a modulated light field strength signal enters the spectrum light splitting lens in an incidence mode, and then light field strength signals with different wavelengths are generated. The linear array light detector collects the light signals with the different wavelengths to form a measuring sequence of the different wavelengths. The random optical modulated matrix and a plurality of measuring sequences, measured in the synchronizing cycle, of the different wavelengths are transferred to the compressing calculation correlation module, images with the different wavelengths are reconstructed, and a real-time and high-resolution hyperspectral image is obtained.

Description

technical field [0001] The invention relates to the field of sparse aperture spectral imaging, in particular to a hyperspectral imaging system and method based on sparse aperture compression calculation correlation. Background technique [0002] Due to the needs of the military and the national economy, space (ground) optical remote sensing technology has developed rapidly in recent years, and various optical remote sensors have emerged as the times require, and their technical performance has also been rapidly improved and perfected. The development of imaging spectrometers is one of the obvious examples. [0003] The "spatial resolution method" is a commonly used method for identifying substances in the prior art, which uses the morphological characteristics of substances to distinguish different substances. This method has been, is and will be a very important means of identifying substances, but it is not always efficient. For example, if the measurement of chlorophyll...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/433
Inventor 孙志斌叶蔚然
Owner NAT SPACE SCI CENT CAS
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