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Laser Light Wavelengths
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The portions of the electromagnetic spectrum used for laser beams. For digitally imaged plates, wavelengths in the ultraviolet, visible, and infrared portions of the spectrum are used for laser devices. The portion of the electromagnetic spectrum used for lasers is measured in nanometers, which are billionths of a meter (abbreviated nm). A larger nanometer reading indicates a longer wavelength. The wavelengths for ultraviolet lasers are between 200 and 400 nm. The nanometer measurement for lasers using wavelengths in visible light portion of the spectrum (the light visible to the human eye) is between 400 and 750. The infrared portion of the electromagnetic spectrum has a wide range of wavelength measurements: 750 nm up to 1 mm. Most of the infrared lasers used for imaging printing plates, however, range between 800 and 1100 nm.
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