Optical component having antireflection structure

摘要

A lens includes a plurality of raised portions and recessed portions in an arrangement, and includes an antireflection structure. The antireflection structure includes an area where a height of each of the raised portions is relatively low and a depth of each of the recessed portions is relatively shallow, and an area where a height of each of the raised portions is relatively high and a depth of each of the recessed portions is relatively deep. In the area where the height of each of the raised portions is relatively low and the depth of each of the recessed portions is relatively shallow, first and second flat surfaces are respectively provided at a top portion of the raised portion and a bottom portion of the recessed portion.

主权项

1. An optical component, comprising:
an antireflection structure in which a plurality of raised portions and recessed portions are arranged, and which reduces reflection of light whose wavelength is equal to or greater than a cycle of the raised portions and a cycle of the recessed portions, wherein the antireflection structure includes an area where a height of each of the raised portions is relatively low and a depth of each of the recessed portions is relatively shallow, and an area where a height of each of the raised portions is relatively high and a depth of each of the recessed portions is relatively deep, in the area where the height of each of the raised portions is relatively low and the depth of each of the recessed portions is relatively shallow, a first flat surface is provided at a top portion of each of the raised portions and a second flat surface is provided at a bottom portion of each of the recessed portions, and an area of each of the first flat surface and the second flat surface is increased as the height of each of the raised portions is reduced or as the depth of each of the recessed portions is reduced.