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The old laser printers used He-Ne laser , and the modern laser printers use infrared laser .

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The old laser printers used He-Ne laser , and the modern laser printers use infrared laser .

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Infrared wave

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infrared color

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A laser thermometer is also often referred to as an infrared thermometer. An infrared thermometer detects the temperature of and object based on the amount of infrared radiation that is given off by said object by focusing the radiation.

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LASER diodes operate at either infrared or visible wavelengths, depending on its construction.

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