CPC G02B 5/005 (2013.01) [G02B 7/021 (2013.01); G02B 7/09 (2013.01); G02B 9/08 (2013.01); G02B 27/0018 (2013.01); G02B 27/0988 (2013.01); G03B 9/02 (2013.01); G02B 5/003 (2013.01); H04N 23/54 (2023.01)] | 7 Claims |
1. An optical lens set, comprising:
a light blocking sheet having a central axis and comprising:
a central hole, wherein the central axis passes through the central hole, which is enclosed by a hole inner surface, the hole inner surface has a first corresponding circle and a second corresponding circle, and a diameter of the first corresponding circle is greater than a diameter of the second corresponding circle; and
a plurality of inner extended portions adjacent to and surrounding the central hole, wherein each of the inner extended portions is extended and tapered from the first corresponding circle towards the second corresponding circle and comprises an inner surface; and
at least two lens elements, wherein one lens element thereof comprises a first connecting structure, the first connecting structure comprises a first receiving surface and a first conical surface, another lens element thereof comprises a second connecting structure, the second connecting structure comprises a second receiving surface and a second conical surface, the first receiving surface and the second receiving surface are corresponding and connected to each other, the first conical surface and the second conical surface are corresponding and connected to each other, the first connecting structure and the second connecting structure are for aligning the one lens element and the another lens element with the central axis, and an outer diameter of the light blocking sheet is smaller than an outer diameter of the one lens element and an outer diameter of the another lens element;
wherein a receiving space is defined by the one lens element and the another lens element, the receiving space is closer to the central axis than both the first conical surface and the second conical surface are to the central axis, the light blocking sheet is received in the receiving space, and the outer diameter of the light blocking sheet is smaller than or equal to a minimum diameter of the first conical surface and a minimum diameter of the second conical surface
wherein the diameter of the first corresponding circle is φ1, the diameter of the second corresponding circle is φ2, a distance between two ends of the inner surface of each of the inner extended portions is w, and the following conditions are satisfied:
φ1>φ2; and
0.02<π×φ1−φ2)/(2×w)<0.9.
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