A scanning device includes a housing, a cold cathode fluorescent lamp (CCFL), and a light emitting diode (LED), a photosensor for detecting light that is emitted from the CCFL and the LED and then by way of a document, and a control circuit for controlling operations of the scanning device. The LED can be used to perform scans while the CCFL is heating.

 
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> System and method of applying horizontally oriented arc-lamps in ellipsometer or the like systems

> Document reading apparatus, image processing apparatus, image forming apparatus, and copying machine
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