Optical transparent member and optical system using the same

摘要

It is an object to provide an optical transparent member and a method of producing an optical member capable of maintaining a high-performance antireflection effect for a base over a long period of time, and an optical system using the same, specifically an optical transparent member including on a base 21 a layer 22 containing SiO2 as a main component, a layer 23 containing Al2O3 as a main component, and a plate crystal layer 24 formed from plate crystals containing Al2O3 as a main component, wherein the surface of the plate crystal layer 24 has a shape of irregularities 25, and an optical system using the same.