An Optical Scanning Holography Method Without Mechanical Motion Scanning

Abstract

The invention discloses an optical scanning holographic method without mechanical motion scanning, belongs to the field of optical imaging, and is an improvement on the traditional optical scanning holographic method. It replaces the two-dimensional mechanical scanning device in the traditional system with a digital micromirror device, and applies the compressed sensing algorithm to the two key links of data recording and complex hologram reconstruction, which avoids the precision of scanning due to mechanical motion in the traditional system. Problems caused by factors such as jitter and jitter can also be greatly reduced the amount of data that the system needs to record. Even at low sampling rates, this method can still reconstruct images of acceptable quality.

Description

Technical field [0001] The invention belongs to the field of optical holographic imaging, in particular to an optical scanning holographic imaging method. Background technique [0002] The optical scanning holography method is an unconventional digital holography method proposed by Professor Poon et al. (T.-C. Poon, "Scanning holography and two-dimensional image processing byacousto-optic two-pupil synthesis," J. Opt. Soc. Am. A 2,621–627, 1985). Different from the traditional way of recording holographic information by interference of object light reference light, this method is based on a double pupil optical system and uses active optical heterodyne scanning to obtain holographic data information (including amplitude and phase) of three-dimensional objects . Its working process is that only through a two-dimensional planar scan, the single-pixel detector can record the intensity information of each layer of the object along the longitudinal direction into a complex hologram,...

AI Technical Summary

Problems solved by technology

In this system, the two-dimensional plane scanning often adopts the method of mechanical scanning, and the horizontal resolution effect of the reconstructed image of the system is largely limited by the scanning accuracy.

However, if a high-precision mechanical scanning device is used, it will undoubtedly increase the cost of the system

In addition, the mechanical scanning process mainly relies on controlling the start-stop movement of the stepping motor, and the unavoidable micro-jitter will cause deviations in the recording of the hologram, thereby affecting the reconstruction effect of the object image

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