| http://www.w3.org/ns/prov#value | - However, in a case where the lens is formed through molding of plastic material, it is preferable that the roughness Rmax is such that Rmax<10 (??m) in consideration of better sliding performance of the lens when it is separated from a mold. [0113] In the above-discussed embodiment of the present invention, a scanning optical system is an optical system for directing the beam from the light source
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