Light Microscopy
Light Microscopy - Related Videos
08:35
Introduction to Light Microscopy
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2023
The light microscope is an instrument used by researchers in many different fields to magnify specimens to as much as a thousand times their original size. In its simplest form, it is composed of a clear lens that magnifies the sample and a light source to illuminate it. However, most light microscopes are much more complex and house numerous fine-tuned lenses with tightly controlled dimensions all within the body of the microscope itself and in components such as the objectives and eyepieces.
10:00
Low-Cost Cryo-Light Microscopy Stage Fabrication for Correlated Light/Electron Microscopy
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Cited by 11 •
2011
We demonstrate the fabrication of a low-cost cryogenic stage designed to fit most reflected light microscopes. This lab-built cryogenic stage enables efficient and reliable correlative imaging between cryo-light and cryo-electron microscopy.
11:16
Correlative Light- and Electron Microscopy Using Quantum Dot Nanoparticles
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Cited by 12 •
2016
A method is described whereby quantum dot (QD) nanoparticles can be used for correlative immunocytochemical studies of epoxy embedded human pathology tissue. We employ commercial antibody fragment conjugated QDs that are visualized by widefield fluorescence light microscopy and transmission electron microscopy.
09:27
Histological Sample Preparation for Light Microscopy
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2023
Histology is the study of cells and tissues, which is typically aided by the use of a light microscope. The preparation of histological samples can vary greatly based on the inherent properties of the samples such as size and hardness as well as expected post-processing which includes planned staining techniques or other down-stream applications. As described in this video, specimen preparation typically begins with a fixation procedure to prevent degradation of the sample by naturally...
09:39
Preparation of Drosophila S2 cells for Light Microscopy
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Cited by 24 •
2010
Drosophila Schneider (S2) cells are an increasingly popular system for the discovery and functional analysis of genes. Our goal is to describe some of the microscopic techniques that make S2 cells such an increasingly important experimental system.
FAQs
In a compound microscope, the objective and eyepiece lenses work together to magnify the image produced from light interacting with the specimen. This coordinated optical arrangement allows researchers to examine structures that cannot be resolved by unaided vision. The resulting magnified view supports observations of cellular structure, tissue organization, and microorganisms.
These approaches enhance contrast, making specimen features easier to distinguish from their surroundings. Stains increase visual differences within a sample, phase contrast improves the visibility of structures without relying on the same staining approach, and fluorescent labels identify features through light emission at specific wavelengths. Selecting among them depends on the structures or processes being examined.
Light may pass through a specimen or reflect from its surface before reaching the microscope’s optical system. This difference provides alternative ways to form an image, depending on how the specimen interacts with light. Considering the illumination path helps researchers choose an observation approach suited to the biological material and the structures they want to examine.
Fluorescent labels are useful when researchers need to distinguish selected structures or components within a specimen. After labeling, the targeted features emit light at specific wavelengths, creating enhanced contrast against other material. This approach can help localize features during cellular imaging and complements stains or phase contrast when ordinary illumination does not provide sufficient visual separation.
A major advantage is its ability to provide time-resolved observations, allowing researchers to follow changes in living samples rather than examining only a fixed moment. This supports studies of dynamic cellular processes and biological behavior. The approach is especially relevant when maintaining the sample’s living context is important to interpreting what happens over time.
The method supports a broad range of biological investigations, including cell structure, tissue organization, microorganisms, and dynamic processes in living samples. Its accessibility and versatility also make it useful in research and teaching, while its imaging capabilities contribute to diagnostics. The appropriate contrast method can be selected according to the specimen and the information required.