| http://www.w3.org/ns/prov#value | - With this, when to increase the angle of view of the optical system, the increase of the effective diameters of the first reflecting surface and those that follow is suppressed. [0314] In a case where the first reflecting surface is an ellipsoid of revolution with a focus at an apparent stop center as viewed from that reflecting surface (entrance pupil to that reflecting surface) and another focus
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