Patent ID: 9671610
Date: 2017-06-06
CPC Classifications: G02B,G03B

Claim:
1. A lens assembly, comprising: a first lens element comprising a first axial assembling surface; a second lens element comprising a second axial assembling surface, wherein the second axial assembling surface is for assembling the first lens element and the second lens element to align a center of the first lens element and a center of the second lens element; and a light blocking member disposed between the first lens element and the second lens element, the light blocking member comprising: a first surface with a central hole, the first surface comprising a first asymmetric opening; a second surface with a central hole, the second surface being corresponding to the first surface and comprising a second asymmetric opening corresponding to the first asymmetric opening; an outside surface disposed between the first surface and the second surface, comprising: a cutting portion connecting the first asymmetric opening and the second asymmetric opening; and an arch portion connecting an edge of the first surface and an edge of the second surface, and connected to two ends of the cutting portion; and an inside surface disposed between the first surface and the second surface, the inside surface connecting the central hole of the first surface and the central hole of the second surface; wherein a virtual curved surface is formed between the two ends of the cutting portion, a virtual line perpendicular to a central axis of the light blocking member is formed between a central point of the virtual curved surface and the central axis of the light blocking member, two shapes of both of the first asymmetric opening and the second asymmetric opening with respect to two sides of the virtual line are asymmetric; wherein the light blocking member has a maximum diameter, one of the first axial assembling surface and the second axial assembling surface has a minimum diameter, and the maximum diameter is smaller than or equal to the minimum diameter.