Phase contrast microscopic module, device and method based on uniaxial crystal

Abstract

The invention discloses a phase contrast microscopic module, device and method based on a uniaxial crystal. The module comprises a first polaroid, a second polaroid and the uniaxial crystal arranged between the first polaroid and the second polaroid. The polarization states of the first polaroid and the second polaroid are orthogonal or parallel; the first polaroid is used for converting incident light carrying information of an object to be measured into linearly polarized light; the uniaxial crystal is used for enabling the left-handed circularly polarized light and the right-handed circularly polarized light generated by the linearly polarized light to generate displacement in opposite directions based on a photon spin Hall effect and / or an angular dispersion effect; and the second polaroid is used for performing sum method or difference method operation on the left-handed circularly polarized light field and the right-handed circularly polarized light field, so that when the displacement of the left-handed circularly polarized light and the right-handed circularly polarized light is far smaller than the spot size, the transmission light field is the first-order differential of the original incident light field. The method can be used for edge enhancement of object intensity information and visualization of object phase information. Compared with a traditional phase contrast microscopic technology, the method is more visual, convenient and time-saving.

Description

technical field [0001] The invention relates to the fields of optical imaging and optical information processing, and in particular to a phase contrast microscope module, method and device based on uniaxial crystals. Background technique [0002] The fast and reliable detection and identification of objects through light waves is the foundation of optical imaging, machine learning and artificial intelligence. Optical phase contrast microscopy can not only achieve edge enhancement of object intensity information, but also convert phase information of transparent objects into intensity patterns. Therefore, optical phase contrast microscopy imaging technology has broad application prospects in the fields of optical high-contrast imaging, biomedicine, face recognition, and optical analog computing. [0003] At present, there are many methods of optical phase contrast microscopy. Commonly used methods include Zernike phase contrast microscopy, Nomarski differential interference ...

AI Technical Summary

Problems solved by technology

However, at present, optical spatial differentiators are mainly based on micro-nano structures such as metal surface plasmons and artificial metasurfaces, which are expensive to manufacture and difficult to produce on a large scale.

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