| http://www.w3.org/ns/prov#value | - Further, also possible is a method which comprises installing the A/D conversion circuit part 805 shown in FIG. 8, which is not shown in FIG. 19, in the periphery of the photoelectric conversion circuit part 801 and the circuit part for reading-out 807, and storing the digital data of the A/D conversion circuit part 805 in the memory of the computer (the control means).
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