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Laser Modules

BioPhotonics
Jan 2011
Coherent Inc.Request Info
 
Coherent Inc. has added three new wavelengths to its Cube family of solid-state continuous-wave visible diode laser modules: 488 nm (50 mW), 685 nm (40 mW) and 730 nm (30 mW). The compact laser heads measure 100 x 40 x 40 mm, making them suitable for integration into instrumentation used for life sciences, metrology and inspection applications. They produce true circular output, M2 beam quality of ≤1.2 and low beam divergence, unlike typical modules that frequently produce elliptical beams. The 488-nm model is a direct replacement for ion and solid-state lasers in fluorescence-based life sciences applications. The 730-nm wavelength is intended for use in confocal microscopy and flow cytometry applications for efficient excitation of new long-wavelength fluorophores. The 685- and 730-nm models are suitable for machine vision applications, where their long wavelength minimizes crosstalk with ambient lighting.


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GLOSSARY
ambient light
Light present in the environment around a detecting or interpreting device, especially a machine vision system, and generated from outside sources. Such light must be treated as noise by the vision system.
crosstalk
The measurable leakage of optical energy from one optical conductor to another. Also known as optical coupling.
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.
laser head
Contains elements which produce lasing., e.g. gain medium, oscillator mirrors as well as housing.
metrology
The science of measurement, particularly of lengths and angles.
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