Intensity relevant diffraction imaging device and image recovery method thereof

Abstract

The invention relates to a strength related diffraction imaging device and the image recovery method thereof, mainly comprising: obtaining object Fourier transform strength information and iterative algorithm of recovering the object transmittance function according to the strength information. And the imaging device comprises a thermal light source, a beam splitter is arranged in the advancing direction of the beam emitted by the thermal light source, in the direction of transmitted beam of the beam splitter are a to-be-detected object and an object light path plane detector, in the direction of reflected beam of the beam splitter is a reference light path, a reference light path plane detector is arranged in the light path, the output ends of the two plane detectors are simultaneously connected with a computer executing data collection and processing, the thermal light source and the two plane detectors are simultaneously triggered and controlled synchronously by a synchronous signal generator. And the invention can implement diffraction imaging of incoherent sources, and can obtain the Fourier transform strength information of the object transmittance function in the Fraunhofer diffraction region on condition of no lens and recovers the amplitude and phase of the object.

Description

technical field [0001] The invention belongs to optical diffraction imaging, in particular to an intensity-correlated diffraction imaging device and an image recovery method thereof. Background technique [0002] The commonly used Fourier transform diffraction imaging is to use a beam of coherent light (usually a plane wave) to irradiate the object to be imaged. When the detector (such as CCD) receives it, it can obtain the Fourier transform intensity information of the transmittance function of the object including the amplitude and phase information of the object, and then use the obtained Fourier transform intensity information to restore the imaged image by using an iterative algorithm. Amplitude or phase information of an object. This image restoration algorithm is limited to pure amplitude objects (with known phase distribution) or pure phase objects (with known amplitude distribution), and cannot obtain ideal restoration results for objects with complex transmittance...

AI Technical Summary

Problems solved by technology

[0009] 1. The present invention can realize diffraction imaging without coherent light source, and solve the problem that it is difficult to obtain coherent light source in certain wavebands (such as X-ray waveband)

Solve the problem of difficult lens processing in certain wavebands (such as X-ray wavebands)

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