OPTICAL ELEMENT, IMAGING APPARATUS INCLUDING THE ELEMENT, AND METHOD OF MANUFACTURING THE OPTICAL ELEMENT

摘要

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. Axes of first projections in the first region are inclined more outward than axes of second projections in the second region.

主权项

1. An optical element obtained by injection molding, the element comprising:
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, wherein a peripheral portion of the surface includes
a first region whose circumferential position corresponds to the gate mark, anda second region being adjacent to the first region, and axes of the projections in the first region are inclined more outward than axes of the projections in the second region.