| http://www.w3.org/ns/prov#value | - In a preferred embodiment wherein the target is a bar code symbol, a source of light, e.g. a laser or a light emitting diode, or even a non-laser light source, generates a light beam which is directed along an optical path with first and second optical elements, e.g. light-reflecting mirrors, preferably front surface planar mirrors, or prisms, to the symbol for reflection therefrom.
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