| http://www.w3.org/ns/prov#value | - In the case of FIG. 1B, the cross section is a plane passing through the lenticules, but at an angle to account for the Winnek tip angle???so that the plane that passes through the lenticules is perpendicular to the boundary of intersection of the lenticules, as shown in FIG. 1B. In the case of FIG. 1C, the cross-section could be made at any angle, because the fly's eye lenses at point 109 are sec
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