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2. Field of view - Wikipedia

   en.wikipedia.org/wiki/Field_of_view

   Angular field of view is typically specified in degrees, while linear field of view is a ratio of lengths. For example, binoculars with a 5.8 degree (angular) field of view might be advertised as having a (linear) field of view of 102 mm per meter. As long as the FOV is less than about 10 degrees or so, the following approximation formulas ...

3. Microscopy - Wikipedia

   en.wikipedia.org/wiki/Microscopy

   Microscopy. Scanning electron microscope image of pollen (false colors) Microscopic examination in a biochemical laboratory. Microscopy is the technical field of using microscopes to view objects and areas of objects that cannot be seen with the naked eye (objects that are not within the resolution range of the normal eye). [1]

4. Optical microscope - Wikipedia

   en.wikipedia.org/wiki/Optical_microscope

   Optical microscope. The optical microscope, also referred to as a light microscope, is a type of microscope that commonly uses visible light and a system of lenses to generate magnified images of small objects. Optical microscopes are the oldest design of microscope and were possibly invented in their present compound form in the 17th century.

5. Diffraction-limited system - Wikipedia

   en.wikipedia.org/wiki/Diffraction-limited_system

   An optical instrument is said to be diffraction-limited if it has reached this limit of resolution performance. Other factors may affect an optical system's performance, such as lens imperfections or aberrations, but these are caused by errors in the manufacture or calculation of a lens, whereas the diffraction limit is the maximum resolution ...

6. Phase-contrast microscopy - Wikipedia

   en.wikipedia.org/wiki/Phase-contrast_microscopy

   In a phase-contrast microscope, image contrast is increased in two ways: by generating constructive interference between scattered and background light rays in regions of the field of view that contain the specimen, and by reducing the amount of background light that reaches the image plane.

7. High-power field - Wikipedia

   en.wikipedia.org/wiki/High-power_field

   A high-power field (HPF), when used in relation to microscopy, references the field of view under the maximum magnification power of the objective being used. Often, this represents a 400-fold magnification when referenced in scientific papers. Area. Area per high-power field for some microscope types: Olympus BX50, BX40 or BH2 or AO: 0.096 mm 2