Numerical Aperture
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Key Factors to Consider When Selecting a Stereo Microscope
Stereo microscopes are often nicknamed the “workhorse” of the lab or production site. Users spend many hours looking through the eyepieces inspecting, observing, documenting, or dissecting samples.…Read article
Koehler Illumination: A Brief History and a Practical Set Up in Five Easy Steps
The technique of Koehler Illumination is one of the most important and fundamental techniques in achieving optimum imaging in any given light microscope set-up. Although it should be routinely used as…Read article
Immersion Objectives: Using Oil, Glycerol, or Water to Overcome some of the Limits of Resolution
To examine specimens at high magnifications using the microscope, there are a number of factors which need to be taken into consideration. These include resolution, numerical aperture (NA), the…Read article
Collecting Light: The Importance of Numerical Aperture in Microscopy
Numerical aperture (abbreviated as ‘NA’) is an important consideration when trying to distinguish detail in a specimen viewed down the microscope. NA is a number without units and is related to the…Read article
Optimization of the Interplay of Optical Components for Aberration free Microscopy
Optical microscopes are used to magnify objects which are otherwise invisible for the human eye. For this purpose high quality optics is necessary to achieve appropriate resolution. However, besides…Read article
Microscope Resolution: Concepts, Factors and Calculation
In microscopy, the term ‘resolution’ is used to describe the ability of a microscope to distinguish detail. In other words, this is the minimum distance at which two distinct points of a specimen can…Read article
Optical Microscopes – Some Basics
The optical microscope has been a standard tool in life science as well as material science for more than one and a half centuries now. To use this tool economically and effectively, it helps a lot to…Read article
Digital Cameras
Manufacturers digital cameras race to outdo each other with ever-increasing numbers of megapixels. The world record for professional medium format digital cameras has now surpassed 60 megapixels per…Read article
Beware of "Empty" Magnification
This article explains how to avoid the phenomen of "empty magnification" in microscopy.Read article