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Microscopes, Electron, Scanning

Definition : Electron microscopes designed to provide a topographical image of the surface of a specimen, useful for understanding its surface structure. Scanning electron microscopes (SEMs) consist of an electron gun and vacuum chamber, an electromagnetic imaging (lens) system, a scanning system, a specimen chamber, secondary and backscatter detectors, a viewing chamber and fluorescent screen, and photographic and vacuum systems. The imaging system provides an electron beam with a fine focal spot that is deflected horizontally and vertically (i.e., scanning system); the energy exchange between the electron beam and the sample yields electromagnetic radiation that is detected to produce an image. Before observation, tissue samples must be fixed (including cryofixation for some dedicated instruments), processed, embedded, sectioned, mounted on a support stub, and usually coated (e.g., using a sputter coater) with a thin film of a heavy metal (e.g., gold). The clinical use of SEMs has yielded information on hematologic disorders and biological surfaces, such as those of the small intestines and serous cavities.

Entry Terms : "SEMs" , "Scanning Electron Microscopes"

UMDC code : 18089

   

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Brock & Michelsen Instrumenter A/S

Brock & Michelsen Instrumenter A/S

Carl Zeiss AG

Carl Zeiss AG

Carl Zeiss Canada Ltd

Carl Zeiss Canada Ltd

Carl Zeiss Co Ltd

Carl Zeiss Co Ltd

Carl Zeiss Ltd

Carl Zeiss Ltd

Carl Zeiss Meditec GmbH

Carl Zeiss Meditec GmbH

Carl Zeiss Meditec Inc

Carl Zeiss Meditec is an integrated medical technology company with two main areas of business activity.

Carl Zeiss Meditec Ltd

Carl Zeiss Meditec Ltd

Carl Zeiss MicroImaging LLC

The Carl Zeiss Group is an international leader in the fields of optics and optoelectronics. In fiscal year 2010/11 the company's approx. 24,000 employees generated revenue of about 4.237 billion euros. In the markets for Industrial Solutions, Research Solutions, Medical Technology and Consumer Optics, Carl Zeiss has contributed to technological progress all over the world for more than 160 years and enhances the quality of life of many people around the globe.

Carl Zeiss NTS LLC

The Carl Zeiss Archives contain original documents, files, photos, patents, registered designs, product literature, technical documentation and instruments from the more than150-year history of Carl Zeiss.As this material is almost exclusively in German, we hope you understand that we can only provide the online database for your research in German.

Carl Zeiss SMT GmbH

Carl Zeiss SMT GmbH

Carl Zeiss SMT Ltd

Carl Zeiss SMT Ltd

Carl Zeiss SMT SAS

Carl Zeiss SMT SAS

FEI Co

FEI is the world leader in the production and distribution of electron microscopes, including scanning electron microscopes (SEM), transmission electron microscopes (TEM), DualBeam­ instruments, and focused ion beam tools (FIB), for nanoscale research, serving a broad range of customers worldwide. Nanotechnology is the science of finding, characterizing, analyzing and fabri­cating materials smaller than 100 nano­meters (a nanometer is one billionth of a meter). FEI's global customer base includes researchers, scientists, engineers, lab managers, and other skilled professionals.

FEI Deutschland GmbH

FEI Deutschland GmbH

FEI Europe bv

FEI Europe bv

FEI France

FEI France

FEI Italia srl

FEI Italia srl

FEI UK Ltd

FEI UK Ltd

Gene Co Ltd

Gene Co Ltd

Hitachi High-Technologies America Inc

Hitachi High Technologies America, Inc. ("HTA") is a privately-owned global affiliate company that operates within the Hitachi Group Companies.

Hitachi High-Technologies Corp

Hitachi High-Technologies Corp

Hitachi High-Technologies Europe (UK)

Hitachi High-Technologies Europe (UK)

Hitachi High-Technologies Europe GmbH

Hitachi High-Technologies Europe GmbH

Hitachi High-Technologies Europe Paris Branch

Hitachi High-Technologies Europe Paris Branch

Horiba Jobin Yvon Co Ltd

Horiba Jobin Yvon Co Ltd

HORIBA Jobin Yvon Ltd

HORIBA Jobin Yvon Ltd

HORIBA Jobin Yvon SA

HORIBA Jobin Yvon SA

HORIBA Jobin Yvon SAS (Beijing)

HORIBA Jobin Yvon SAS (Beijing)

HORIBA Jobin Yvon srl

HORIBA Jobin Yvon srl

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