| http://www.w3.org/ns/prov#value | - However, it should be understood by one of ordinary skill in the art that many different kinds of optical elements, such as optical fibers and bundles thereof, mirrors, lenses including refractive optical elements, diffractive optical elements, Fresnel optical elements, reflective optical elements and the like may replace or be used in conjunction with lens system 24 so as to provide a suitable vi
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