Optical element, imaging apparatus including the element, and method of manufacturing the optical element
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United States of America Patent
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Mar 15, 2016
Grant Date -
Oct 30, 2014
app pub date -
Apr 23, 2014
filing date -
Apr 4, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A lens is obtained by injection molding. The lens includes a plurality of projections arranged on a surface at a pitch smaller than or equal to a predetermined value to reduce reflection of light with a wavelength equal to or greater than the pitch, and a gate mark formed on an outer periphery of the optical element in the injection molding. A peripheral portion of the surface includes a first region whose circumferential position corresponds to the gate mark, and a second region being adjacent to the first region. A pitch of first projections in the first region is greater than a pitch of second projections in the second region.
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