Synthetic phase shifting digital holographic microscopy

Abstract

The invention discloses synthetic phase shifting digital holographic microscopy. A large quantity of low-resolution phase shifting holograms is synthesized to form a high-resolution phase shifting hologram through ingenious design of a synthetic phase shifting algorithm for solving a linear system of equations, then the high-resolution phase shifting hologram is subjected to inverse transformation, and a complex amplitude image with high resolution and signal-to-noise ratio is reproduced. Compared with traditional phase shifting digital holography, the synthetic phase shifting digital holographic microscopy can improve the holographic imaging resolution remarkably; compared with synthetic aperture digital holographic microscopy, the synthetic phase shifting digital holographic microscopy has the advantage that the high-resolution hologram can be acquired accurately without a splicing fusion process of multiple holograms.

Description

technical field [0001] The invention relates to a digital holographic microscopic technique, in particular to a digital holographic microscopic technique using a synthetic phase shift algorithm. Background technique [0002] Digital holographic microscopy technology is a new type of microscopic imaging technology developed based on digital holography combined with optical microscopy technology. See (J. Opt. Soc. Am. 4(1), 159-165, 1987). However, the development of digital holography technology has encountered a huge bottleneck, that is, the resolution of CCD is low and the bandwidth is small. At present, most of the common CCDs on the market are megapixels, and the resolution is low, which is far from meeting the actual needs of digital holographic microscopy. In the lensless holographic optical path, the density of interference fringes is usually less than 1um×1um, so the existing CCD usually cannot record the complete information of interference fringes. [0003] In or...

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