Dual-mode digital holographic microscope

Abstract

The invention discloses a dual-mode digital holographic microscope. The dual-mode digital holographic microscope comprises a light source, a beam expansion collimation system, a first cubic beam splitter, a first baffle board, a first plane reflector, a first microscope objective lens, a second cubic beam splitter, a second microscope objective lens, a second plane reflector, a second baffle board, a third plane reflector, an achromatic lens, a third cubic beam splitter and an imaging device. A light beam emitted by the light source passes through the beam expansion collimation system and is then divided into transmission and reflection beams by the first cubic beam splitter. Through controlling the first baffle board and the second baffle board, the light beam propagation path is controlled, and switching between reflective and transmissive measurement modes can be realized. The dual-mode digital holographic microscope is advantaged in that the dual-mode digital holographic microscopecan be used not only for three-dimensional microscopic imaging of transparent samples, but also for three-dimensional microscopic imaging of reflective sample surfaces, convenient test and the compact structure are realized, and the dual-mode digital holographic microscope can be more widely applied to the practical engineering measurement field.

Description

technical field [0001] The invention belongs to the technical fields of optical measurement and digital holographic imaging, and in particular relates to a dual-mode digital holographic microscopic device. Background technique [0002] Digital Holography (Digital Holography) is the product of the combination of ordinary holography, computer technology, and electronic imaging technology. Different from ordinary holography, digital holography uses CCD, CMOS and other electronic imaging devices instead of holographic dry plates to record holograms, and store the recorded holograms in the computer. Then, the hologram stored in the computer is reconstructed by numerical calculation method. Digital holography has the advantages of short exposure time, continuous real-time online holographic recording under video, and simultaneous acquisition of the intensity distribution map and phase distribution map of the object light wave. [0003] With the development of semiconductor and m...

AI Technical Summary

Problems solved by technology

Regardless of the measurement mode, optical components such as light sources, lenses, cubic beam splitters, and mirrors are required to form a complex optical path, and only the same type of sample can be measured

For example, the digital holographic microscopic imaging devices shown in Chinese invention patents CN 105159043A and CN105242512A have a single equipment structure. When testing reflective and transmissive samples, different measuring equipment needs to be provided, which is costly and unfavorable for system integration. Therefore, in engineering The practical promotion and application are limited

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