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UV Laser

Photonics Spectra
May 2010
Coherent Inc.Request Info
 
The Genesis CX355-250 from Coherent Inc., a solid-state CW ultraviolet laser, delivers more than 250 mW of output power. Its TEM00 output beam has an M2 value of <1.2, enabling optimum collimation and/or refocusing to a diffraction-limited spot, and its optically pumped semiconductor technology provides <0.5% noise, enabling OEM instruments to achieve good signal-to-noise characteristics. Applications include flow cytometry of live cells such as eggs, fertilized-egg sorting, fluorescence-based applications such as confocal microscopy, and 3-D prototyping applications such as stereolithography.


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GLOSSARY
collimation
1. The process of aligning the optical axes of optical systems to the reference mechanical axes or surfaces of an instrument. 2. The adjustment of two or more optical axes with respect to each other. 3. The process by which a divergent beam of radiation or particles is converted into a parallel beam.
flow cytometry
A method of measuring the characteristics of microscopic particles, usually cells, as they flow in a fluid stream through a beam of light. Particles may be stained with fluorescent dye and the fluorescence detected via laser illumination.
fluorescence
The emission of light or other electromagnetic radiation of longer wavelengths by a substance as a result of the absorption of some other radiation of shorter wavelengths, provided the emission continues only as long as the stimulus producing it is maintained. In other words, fluorescence is the luminescence that persists for less than about 10-8 s after excitation.
noise
The unwanted and unpredictable fluctuations that distort a received signal and hence tend to obscure the desired message. Noise disturbances, which may be generated in the devices of a communications system or which may enter the system from the outside, limit the range of the system and place requirements on the signal power necessary to ensure good reception.
stereolithography
A method of creating real three-dimensional models by using lasers driven by CAD software. In contrast to the normal practice of removing material, this process polymerizes a liquid to quickly produce shapes that are untouched by human hands or cutting tools. Also known as three-dimensional imaging and three-dimensional modeling.  
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