Fluorescence is one of the most commonly used physical phenomena in biological and analytical microscopy, mainly because of its high sensitivity and high specificity. Fluorescence is a form of luminescence. Fluorescence microscopy even allows users to determine the distribution of a single molecule species, its amount and its localization inside a cell. Colocalization and interaction studies can be performed, and ion concentrations as well as intra- and intercellular processes like endocytosis and exocytosis can be observed. With the help of super-resolution fluorescence microscopy, it is even possible to image sub-resolution structures. Read more about fluorescence microscopy, quantitative fluorescence and super-resolution on Leica Science Lab.
Our experts on solutions for fluorescence applications are happy to help you with their advice.
The THUNDER Imager Model Organism allows fast and easy 3D exploration of whole organisms for developmental or molecular biology research.
THUNDER Imagers provide you with a solution for advanced 3D cell culture assays, whether you want to study stem cells, spheroids, or organoids.
The THUNDER Imager Tissue allows real-time fluorescence imaging of 3D tissue sections typically used in neuroscience and histology research.
4.2 MP cooled monochrome fluorescence scmos camera for advanced applications like high-speed live cell imaging, FRAP, and ratio measurement
Ultramicrotome for array tomography
(Semi)-automated fluorescence stereo microscopes
For routine to live cell research
Software platform for life science applications
Corr. Objective for Stereo Microscopes
Increase work efficiency with Leica DM4 B & DM6 B upright digital research microscopes.
Ergonomic optical microscope systems for routine and research applications
Uniquely ergonomic system microscope with LED illumination
Simple LED transmitted illumination
Accurate and Reproducible Results
1.3 MP monochrome camera for basic fluorescence applications such as documentation of fixed, immunostained samples
Ultramicrotome for Perfect Sectioning at Room Temperature and Cryo
Inverted Laboratory Microscope with LED Illumination
Uniquely Ergonomic System Microscope
Fixed Stage Microscope for Electrophysiology and in vivo Imaging
Transmitted Light Base For Brightfield and Darkfield Applications Absorbs Shock and Vibrations for High Quality Imaging
Fluorescence stereomicroscope accessory
LED Multi Contrast Illumination for Routine Stereo Microscopes
LED Spotlight Illuminator with Gooseneck
Fluorescence Microscope System for Advanced Imaging and Analysis
Uniquely Ergonomic System Microscopes With Intelligent Automation
Fluorescence microscopes used in research applications are based on a set of optical filters:
The filters are often plugged in together in a filter cube (compound microscopes) or in a flat holder (mainly stereo microscopes).
Whereas the excitation filter selects the wavelengths to excite a particular dye within the specimen, the emission filter serves as a kind of quality control by letting only the wavelengths of interest emitted by the fluorophore pass through. The dichroic mirror's purpose is to reflect light in the excitation band and transmit light in the emission band, enabling the classic epifluorescence incident light illumination.
This fluorescence tutorial explains the optical elements in the light path and the operating mode of fluorescence microscopy taking the example of an inverted microscope which can be used for transmitted light contrasting methods and fluorescence microscopy.
Leica Microsystems’ fluorescence stereo microscopes use the TripleBeam technology, a separate (third) beam path for fluorescence illumination of the sample without a dichroic mirror.
Therefore one excitation filter for the illumination beam path and two emission filters, one for each observation beam path, are needed.
Leica M205 FCA & M205 FA | Leica M165 FC | Leica MZ 10 F | Leica Fluocombi III
To acquire fluorescence images, it is necessary to use the appropriate