| CPC H04N 23/55 (2023.01) [G02B 1/002 (2013.01); G02B 13/0065 (2013.01); G02B 2207/101 (2013.01)] | 33 Claims |
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1. An imaging lens assembly, comprising:
a plurality of optical elements, an optical axis passing through the optical elements; and
a light path folding mechanism disposed on the optical axis to fold the optical axis at least once, and comprising:
at least one light folding element, comprising:
a reflecting surface configured to fold an incident light path of the at least one light folding element towards an exit light path;
an incident surface disposed on an object side of the reflecting surface, and the incident light path passing through the incident surface; and
an exit surface disposed on an image side of the reflecting surface, and the exit light path passing through the exit surface;
a light blocking structure disposed on at least one of the incident surface and the exit surface of the at least one light folding element, and the light blocking structure comprising:
a main light blocking portion located on a peripheral portion closest to the optical axis on a cross section passing through the optical axis; and
a nanostructure layer continuously distributed over the at least one of the incident surface and the exit surface of the at least one light folding element and the main light blocking portion of the light blocking structure, and the nanostructure layer having a plurality of irregular ridged convexs;
wherein the main light blocking portion of the light blocking structure surrounds the optical axis to define a light through area;
wherein an average height of the nanostructure layer is between 90 nm and 350 nm.
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