| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a high-quality optical element including a light beam effective part that has achieved excellent antireflection performance and a lens outer edge part that prevents the occurrence of harmful light such as flare and ghost.SOLUTION: There is provided an optical element that has an antireflection function comprising a fine concavo-convex structure at a used wavelength or less provided at least at a part of a light beam effective part, where the optical element includes a non-light beam effective part having a concavo-convex shape with a surface roughness Rdefined below of 50 nm or more and 50μm or less formed on a part or all thereof.</p> |
