Reflective digital holographic microscopic imaging system and method based on pulsed laser

Abstract

The invention discloses a pulse laser-based reflective digital holographic microscopy imaging system and method. The reflective digital holographic microscopy imaging system comprises an optical imaging sub system and a synchronous control sub system for controlling the operation of the optical imaging sub system, wherein the optical imaging sub system comprises a pulse laser, a laser attenuator, a steering apparatus, a light beam transfer apparatus and a holographic imaging apparatus which are arranged in sequence; the synchronous control sub system comprises an industrial control host and a synchronous controller; the reflective digital holographic microscopy imaging method comprises the following steps of 1, establishing the holographic microscopy imaging system; 2, performing synchronous control on the pulse laser and a digital camera; 3, obtaining hologram data; and 4, performing three-dimensional appearance holographic image display on the surface of a test sample. The system and the method are creative in design; by performing synchronous control on the pulse laser and the digital camera, the high-frequency micro-vibration test sample hologram is obtained; light path interference is completed through four beam splitters, so that a condition that reflective stray light enters the hologram caused by self parts in the light path can be avoided; and the hologram is high in quality.

Description

technical field [0001] The invention belongs to the technical field of digital holographic microscopic imaging, and in particular relates to a reflective digital holographic microscopic imaging system and method based on a pulse laser. Background technique [0002] Digital holography technology, which has developed rapidly with the advancement of computer and digital camera technology, not only inherits the advantages of holography technology that can record and reproduce the light field phase, but also realizes the full digitalization of light field recording, storage and reproduction, so it is widely used. . Among them, digital holographic microscopy, which is formed by the fusion of holographic technology and microscopic technology, has been applied in the fields of shape measurement, microcircuit detection, particle size analysis, biological cell observation, deformation and vibration measurement, and component defect detection. Some achievements have been made; among t...

AI Technical Summary

Problems solved by technology

However, when it is necessary to shoot or observe micro-vibrations or fluctuations with fast-changing frequencies, ordinary continuous lasers cannot satisfy the dynamic capture. In addition, the biggest difficulty in the current application of digital holographic microscopy is how to effectively improve digital Reproduce image quality. The noise of digital images mainly comes from the process of image acquisition and transmission. When the existing research analyzes the noise of various digital images, a corresponding algorithm is proposed to eliminate the noise of digital images. The process is complicated.

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