scanning electron microscope

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microscope

 [mi´kro-skōp]
an instrument used to obtain an enlarged image of small objects and reveal details of structure not otherwise distinguishable.
The light path of a darkfield microscope. From Hart and Shears, 1997.
acoustic microscope one using very high frequency ultrasound waves, which are focused on the object; the reflected beam is converted to an image by electronic processing.
binocular microscope one with two eyepieces, permitting use of both eyes simultaneously.
compound microscope one consisting of two lens systems whereby the image formed by the system near the object is magnified by the one nearer the eye.
darkfield microscope one so constructed that illumination is from the side of the field so that details appear light against a dark background.
electron microscope one in which an electron beam, instead of light, forms an image for viewing, allowing much greater magnification and resolution. The image may be viewed on a fluorescent screen or may be photographed. Types include scanning and transmission electron microscopes.
fluorescence microscope one used for the examination of specimens stained with fluorochromes or fluorochrome complexes, e.g., a fluorescein-labeled antibody, which fluoresces in ultraviolet light.
light microscope one in which the specimen is viewed under ordinary illumination.
operating microscope one designed for use in performance of delicate surgical procedures, e.g., on the middle ear or small vessels of the heart.
phase microscope (phase-contrast microscope) a microscope that alters the phase relationships of the light passing through and that passing around the object, the contrast permitting visualization of the object without the necessity for staining or other special preparation.
scanning electron microscope (SEM) an electron microscope that produces a high magnification image of the surface of a metal-coated specimen by scanning an electron beam and building an image from the electrons reflected at each point.
simple microscope one that consists of a single lens.
slit lamp microscope a corneal microscope with a special attachment that permits examination of the endothelium on the posterior surface of the cornea.
stereoscopic microscope a binocular microscope modified to give a three-dimensional view of the specimen.
transmission electron microscope (TEM) an electron microscope that produces highly magnified images of ultrathin tissue sections or other specimens. An electron beam passes through the metal-impregnated specimen and is focused by magnetic lenses into an image.
x-ray microscope one in which x-rays are used instead of light, the image usually being reproduced on film.

scan·ning e·lec·tron mi·cro·scope

a microscope in which the object in a vacuum is scanned in a raster pattern by a slender electron beam, generating reflected and secondary electrons from the specimen surface that are used to modulate the image on a synchronously scanned cathode ray tube; with this method a three-dimensional image is obtained, with both high resolution and great depth of focus.

scan·ning e·lec·tron mi·cro·scope

(skan'ing ĕ-lek'tron mī'krŏ-skōp)
A microscope in which the object in a vacuum is scanned in a raster pattern by a slender electron beam, generating reflected and secondary electrons from the specimen surface that are used to modulate the image on a synchronously scanned cathode ray tube; with this method a three-dimensional image is obtained, with both high resolution and great depth of focus.

scanning electron microscope

see ELECTRON MICROSCOPE.

scan·ning e·lec·tron mi·cro·scope

(skan'ing ĕ-lek'tron mī'krŏ-skōp)
A microscope in which the object in a vacuum is scanned in a raster pattern by a slender electron beam, generating reflected and secondary electrons from the specimen surface that are used to modulate the image on a synchronously scanned cathode ray tube; with this method a three-dimensional image is obtained, with both high resolution and great depth of focus.
References in periodicals archive ?
Caption: Low-temperature scanning electron micrograph of ice cream after hardening and temperature-abusive storage, showing a large increase in ice crystal size, resulting in a coarsening of texture.
The surface microporosity favoured the ingrowth and proliferation of the cells as evidenced from scanning electron micrographs. The blend material also possesses sufficient strength to prevent cutting and tearing through suture holes.
viii + 314 pages; tables; figures; one photomicrograph; one scanning electron micrograph; references; index.
A scanning electron micrograph was used to prove the effect of the cleaning method.
Chronic Tanner Labs, a division of Tanner Research, today said it will begin offering scanning electron micrograph (SEM) services in its MEMS R&D and Fabrication Facility in Pasadena, Calif.
Based on a scanning electron micrograph and EDS readout of pigment from a rapid-deployment paint system, researchers can gather both qualitative and semiquantitative chemical analysis data, which are useful in many of the studies conducted by FHWA staff.
Figure 2 shows an optical micrograph and a scanning electron micrograph of a fully fabricated microheating element.
In this colored scanning electron micrograph, killer T-lymphocytes (orange), which are part of the body's immune system, have released a chemical that is killing a cancer cell (pink).
Fuller and Lutz (1989) published scanning electron micrograph sequences of the larvae and postlarvae of six mytilids from the northwestern Atlantic: Arcuatula papyria (= Amygdalum papyrium) (Figs.
Scanning electron micrograph of the spore (S) and crystal proteins(C) from Bacillus thuringiensis isolate (a) parasporal bodies, (b) bipyramidal crystalline inclusions, (c) different crystalline inclusions--cuboidal, spherical, amorphous
Scanning electron micrograph of the lingual apex showing the filiform (black arrow) and fungiform papillae (white arrow).
Caption: The tail of a mite, shown in pink in this false-color scanning electron micrograph, sits behind a hair in a hair follicle.

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