Microscopy

A microscope () is a laboratory instrument used to examine objects that are too small to be seen by the naked eye. Microscopy is the science of investigating small objects and structures using a microscope. Microscopic means being invisible to the eye unless aided by a microscope.

thumb|right|An agar plate streaked with [[microorganisms]]

microbiological method for identification; method of staining used to differentiate bacterial species into two large groups (gram-positive and gram-negative)

thumb|Pleochroism of cordierite shown by rotating a polarizing filter on the lens of the camera thumb|Pleochroism of tourmaline shown by rotating a polarizing filter on the lens of the camera

thumb|300px|Scanning electron microscope image of [[pollen (false colors)]] thumb|250px|Microscopic examination in a biochemical laboratory

optical polarizer made of two birefrengent calcite crystals

histological stain method using hematoxylin and eosin

optical imaging technique for increasing optical resolution and contrast of a micrograph by means of using a spatial pinhole to block out-of-focus light in image formation

dimensionless number that characterizes the range of angles over which the system can accept or emit light

thin piece of glass (or transparent material) used to hold objects for examination under a microscope

Micrographia: or Some Physiological Descriptions of Minute Bodies Made by Magnifying Glasses. With Observations and Inquiries Thereupon is a historically significant book by Robert Hooke about his observations through various lenses. It was the first book to include illustrations of insects and plants as seen through microscopes.

optical device that splits a beam of light in two, crucial part of most interferometers

chemical compound

thumb|Polarized light dermatoscope

Fluorescence imaging technique

right|thumb|Photobleaching: The movie shows photobleaching of a fluorosphere. The movie is accelerated, the whole process happened during 4 minutes. In optics, photobleaching (sometimes termed fading) is the photochemical alteration of a dye or a fluorophore molecule such that it is permanently unable to fluoresce. This is caused by cleaving of covalent bonds or non-specific reactions between the fluorophore and surrounding molecules. Such irreversible modifications in covalent bonds are caused by transition from a singlet state to the triplet state of the fluorophores. The number of excitatio

technique used to increase the resolving power of a microscope

optical fluorescence microscopy

analytical technique used in materials science

experimental technique in cell biology

type of statistical analysis

thumb|300px|Micrograph of paper autofluorescing under [[ultraviolet illumination. The individual fibres in this sample are around 10 μm in diameter.]] Autofluorescence is the natural fluorescence of biological structures (autofluorophores) such as mitochondria and lysosomes, in contrast to fluorescence originating from artificially added fluorescent markers (fluorophores).

Method of specimen illumination used in optical microscopy

thumb|right|100× light micrograph of Meissner's corpuscle at the tip of a dermal papillus thumb|40× micrograph of a canine rectum cross section thumb|A photomicrograph of a thin section of a limestone with [[ooids. The largest is approximately 1.2 mm in diameter. The red object in the lower left is a scale bar indicating relative size.]] thumb|Approximately 10× micrograph of a doubled die on a coin, where the date was punched twice in the die used to strike the coin

Stereology is a branch of applied mathematics that is the three-dimensional interpretation of two-dimensional cross sections of materials or tissues. It provides practical techniques for extracting quantitative information about a three-dimensional material from measurements made on two-dimensional planar sections of the material. Stereology is a method that utilizes random, systematic sampling to provide unbiased and quantitative data. It is an important and efficient tool in many applications of microscopy (such as petrography, materials science, and biosciences including histology, bone and

chemical compound

Transillumination is the technique of sample illumination by transmission of light through the sample. Transillumination is used in a variety of methods of imaging.

type of polarizer

thumb|A 1 mm diameter microphotograph,

procedure used to stain certain acid-fast species of bacteria

alt=Collection of a ptychographic imaging data set in the simplest single-aperture configuration.|thumb|Collection of a ptychographic imaging data set in the simplest single-aperture configuration. (a) Coherent illumination incident from the left is locally confined onto an area of the specimen. A detector downstream of the specimen records an interference pattern. (b) The specimen is shifted (in this case, upwards) and a second pattern is recorded. Note that regions of illumination must overlap with one another to facilitate the ptychographic shift-invariance constraint. (c) A whole ptychogra

1903 film by F. Martin Duncan

thumb|Major topics of pathology Health informatics|informatics, including some that underlie telepathology: slide scanning, digital imaging and networks. Telepathology is the practice of pathology at a distance. It uses telecommunications technology to facilitate the transfer of image-rich pathology data between distant locations for the purposes of diagnosis, education, and research. Performance of telepathology requires that a pathologist selects the video images for analysis and the rendering of diagnoses. The use of "television microscopy", the forerunner of telepathology, did not require

company

sub-field of pathology

German physicist (1909–1982)

optical instrument

a Method of Isolating Endospores By Staining Them and Using Malachite Green and Safranin

thumb|right|Microdensitometer

timeline

Ultramicrotomy is a method for cutting specimens into extremely thin slices, called ultra-thin sections, that can be studied and documented at different magnifications in an electron microscope such as a transmission electron microscope (TEM). It is used mostly for biological specimens, but sections of plastics and soft metals can also be prepared. For example, recently ultramicrotomy was used to make 2D material devices and use it for DNA sensing. The biological sections must be very thin because the 50 to 125 kV electrons of the standard electron microscope cannot pass through biologica

microscopic artworks

inclusion bodies for misfolded proteins

quantitative phase microscope

type of microscopy

Magnetic Resonance Imaging at microscopic resolutions