annular detector

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• Annular dark-field imaging — is a method of mapping samples in a scanning transmission electron microscope (STEM). These images are formed by collecting scattered electrons with an annular dark field detector in scanning transmission electron microscopes.For dark field… …   Wikipedia

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• ESEM — stands for environmental scanning electron microscope. This is a scanning electron microscope (SEM) that allows a gaseous environment in the specimen chamber. Whereas all conventional microscopes operate in vacuum, the ESEM has added a new… …   Wikipedia

• Transmission electron microscopy — A TEM image of the polio virus. The polio virus is 30 nm in size.[1] Transmission electron microscopy (TEM) is a microscopy technique whereby a beam of electrons is transmitted through an ultra thin specimen, interacting with the specimen as it… …   Wikipedia

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• photoreception — photoreceptive, adj. /foh toh ri sep sheuhn/, n. the physiological perception of light. [1905 10; PHOTO + RECEPTION] * * * Biological responses to stimulation by light, most often referring to the mechanism of vision. In one celled organisms such …   Universalium

• Spin polarization — is the degree to which the spin, i.e. the intrinsic angular momentum of elementary particles, is aligned with a given direction. This property may pertain to the spin, hence to the magnetic moment, of conduction electrons in ferromagnetic metals …   Wikipedia

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