| http://www.w3.org/ns/prov#value | - ral magnification of said image-forming element, u is an angle which an arbitrary ray leaving an object on said optical axis makes with respect to said optical axis, and u??? is an angle which said arbitrary ray after passing through said image-forming element makes with respect to said optical axis, (2) a photodetector, (3) filters for wavelength-division multiplexing and demultiplexing, said plu
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