显微镜知识库

徕卡显微系统的知识库提供有关显微镜学科的科学研究和教学材料。内容旨在对显微镜初学者、有经验的显微镜操作实践者和使用显微镜的科学家在他们的日常工作和实验有所帮助。这里有探索交互式教程和应用笔记，你可以找到你需要的显微镜的基础知识以及前沿技术——快来加入徕卡显微知识社区，分享您的专业知识！

Expert Techniques for Superior Visualization in Cataract Surgery

Join renowned ophthalmic surgeons, Dr. Hussein Almuhtaseb and Mr. Simon Madge, as they share their clinical expertise and real-world surgical strategies during the 2025 Online Cataract Surgery…

Eliminating Electrostatic Interference in Laser Microdissection

Electrostatic charge in laser microdissection (LMD) causes two critical failures: samples stick to charged surfaces and are lost, or samples fly into adjacent wells and cause cross-contamination. We…

History, Developments and Trends of Microscopy in Cancer Research

Cancer is a global disease, with 18 million new cases diagnosed and 10 million cancer-related deaths worldwide in 2020. This burden is set to increase, with a projected increase in cases of ~55% by…

Mouse fibroblasts where F-actin is labelled with FITC (green), tubulin with Cy5 (red), and nuclei with DAPI (blue). Image courtesy of Dr. Günter Giese, Max Planck Institute for Medical Research, Heidelberg, Germany.

荧光染料

荧光显微镜的基本原理是借助荧光染料对细胞成分进行高度特异性的可视化观察。这可能是一种与兴趣蛋白质遗传相关的荧光蛋白，如绿色荧光蛋白（GFP）等。如果克隆无法实现，例如在组织学样本上无法实现，则需要使用另一种技术如免疫荧光染色来对兴趣蛋白质进行可视化观察。为此，人们使用抗体来连接不同的荧光染料并将其直接或间接地结合到适当的靶点上。此外，借助荧光染料，荧光显微镜的应用就不再仅局限于蛋白质观察，还能对核…

Researchers Insights: Microscopy in Cancer Research

Discover how imaging techniques are driving cancer research forward. In this issue, we present comprehensive multimodal studies using microscopy, as well as new directions in intraoperative cancer…

Predictive Service Prevents Downtime in Ghent

At the VIB BioImaging Core in Ghent, Belgium, researchers depend on Leica’s Stellaris 8 confocal microscope to explore the frontiers of biomedical science. When Leica’s RemoteCare system detected a…

Zebrafish heart, DAPI (nuclei, blue), Tropomyosin (cardiomyocytes, red) and GFP (primordial cardiac layer, green). Courtesy of Anna Jazwinska, University of Fribourg, Switzerland.

显微镜中的荧光

荧光显微技术是一种特殊的光学显微镜技术。它利用的是荧光色素在一定波长的光激发下发光的能力。通过抗体染色或荧光蛋白标记，可以用这种荧光色素标记感兴趣的蛋白质。这样就可以确定单分子物种的分布、数量及其在细胞内的定位。此外，还可以进行共定位和相互作用研究，使用可逆结合染料（如 Ca2+ 和 fura-2）观察离子浓度，以及观察细胞的内吞和外吞过程。如今，利用荧光显微镜甚至可以对亚分辨率颗粒进行成像。

Some 2D measurements, e.g., lengths and areas, made on a PCB sample with a Leica measurement microscope using the Enersight software.

如何选择合适的测量显微镜

使用测量显微镜，用户可以测量样品特征的二维和三维尺寸，这对检测、质量控制、故障分析和研发&D 至关重要。然而，选择合适的显微镜需要评估应用需求以及显微镜的性能、易用性和灵活性。如今，测量通常以数字方式进行，即使用带有摄像头和软件的显微镜，图像显示在显示器上，而不是通过目镜网线，从而提高了精度和可重复性。使用合适的测量显微镜可靠、快速地分析样品。

Example of calibrating a microscope at a higher magnification value using a stage micrometer.

显微镜测量校准：为什么要这样做？

显微镜校准可确保检测、质量控制 (QC)、故障分析和研发 (R&D) 所需的测量准确一致。本文介绍了校准步骤。使用参照物进行校准可使结果具有可重复性，并有助于确保与准则和标准一致。为了获得准确一致的结果，建议校准显微镜并定期检查。如有需要，可向校准专家寻求支持。

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