Patent ID: 9703017
Date: 2017-07-11
CPC Classifications: B29D,B29K,G02B

Claim:
1. An optical lens comprising a lens section with a refractive power, wherein the lens section comprises one or more effective optical lens surfaces which contributes to image forming of the lens section, and a plurality of smoothly curved first concave marks and a smoothly curved second concave mark, which are formed to be recessed on one or more surfaces of the lens section, are provided in the one or more effective optical lens surfaces, wherein a width of each of the first and second concave marks is equal to or greater than 0.05 μm and equal to or less than 14 μm, wherein a depth of recession of each of the first and second concave marks is equal to or greater than 0.05 μm and equal to or less than 5 μm, and wherein at least one of the first concave marks is formed along a simple closed curve that encloses the optical axis of the lens section, and the second concave mark is formed on the optical axis.