Single-pixel holographic camera

A single-pixel, camera technology, applied in the field of holographic imaging, can solve the problem that the image does not contain spatial coordinate information, etc.

Inactive Publication Date: 2016-04-06
SICHUAN UNIV
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Problems solved by technology

This single-pixel camera can only record the intensity information of the light field and directly ignores the phase information of the light field. In other words, the recorded image does not contain spatial coordinate information.

Method used

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0041] The working process of a single-pixel holographic camera includes a recording stage and a reconstruction stage; the recording stage uses the transformation matrix of the spatial amplitude modulation device to encode the Fourier spectrum information of the Fresnel diffraction hologram of the object; the single-pixel intensity detection The module completes the analysis and recording of time-varying signals; by changing the transformation matrix of the spatial amplitude modulation device multiple times and performing corresponding measurements, the compressed sensing imaging result of the Fourier spectrum of the Fresnel diffraction hologram of the object is finally obtained. The reconstruction stage is based on the selected encoding matrix using the minimized l 1 The norm algorithm restores the spectral information, and then reconstructs the Fresne...

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Abstract

The present invention relates to a single-pixel holographic camera, belonging to the field of holographic imaging. The working process of the system comprises the stages of recording and reconstruction. In the recording stage, the transformation matrix of a space amplitude modulating device is used to encode the Fourier spectral information of the Fresnel diffraction hologram of an object, the analysis and record of a time varying signal are completed by a single pixel intensity detection module, the corresponding measurement is carried out through changing the transformation matrix of the space amplitude modulating device for many times, and finally the compressed sensing imaging result of the Fourier spectrum of object Fresnel diffraction hologram is obtained. In the reconstruction stage, according to the selected encoding matrix, by using a minimization L1 norm algorithm, the recovery of spectral information is carried out, and the Fresnel diffraction hologram of the object is reconstructed through the Fourier transformation.

Description

technical field [0001] The invention relates to a single-pixel holographic camera, which belongs to the field of holographic imaging. Background technique [0002] The traditional holographic imaging technology uses a beam splitter to convert the light emitted by a monochromatic laser source into two paths: object light and reference light. The scattered light after the object light irradiates the object interferes with the combined beam of the reference light. Make a note. The reconstruction process is to irradiate the holographic dry plate with the same light as the reference beam, and obtain the reproduced object light wave behind the dry plate. This method can completely record the complex amplitude of the Fresnel diffraction hologram of the object, but due to the existence of the DC term during recording, a large background light intensity is superimposed in the reconstruction process; Conjugate terms are also generated during reconstruction. These factors will affec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03H1/12
Inventor 周昕呼有军王梦婷
Owner SICHUAN UNIV
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