Photographing lens system, image capturing unit and electronic device
AssigneeLargan Precision Co., Ltd.
InventorsHung-Shuo Chen, Hsin-Hsuan Huang
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Abstract
A photographing lens system includes five lens elements which are, in order from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element has positive refractive power. The third lens element has an object-side surface being convex in a paraxial region thereof. The fourth lens element has an object-side surface being convex in a paraxial region thereof.
Claims30
A photographing lens system comprising five lens elements, the five lens elements being, in order from an object side to an image side:
- a first lens element having positive refractive power;
- a second lens element;
- a third lens element having an object-side surface being convex in a paraxial region thereof;
- a fourth lens element having an object-side surface being convex in a paraxial region thereof;
- and
- a fifth lens element;
- wherein a refractive power of the first lens element is P1, a refractive power of the second lens element is P2, a refractive power of the third lens element is P3, a refractive power of the fourth lens element is P4, a refractive power of the fifth lens element is P5, an axial distance between the second lens element and the third lens element is T23, an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, a central thickness of the second lens element is CT2, a central thickness of the fourth lens element is CT4, and the following conditions are satisfied:
- (|P3|+|P4|+|P5|)/(|P1|+|P2|)<0.60;
- 3.50<|P1|+|P2|<8.50;
- 0.20<(T34/T45)+(T45/CT4)<1.50;
- and
- 0.10<(CT2+T34)/T23<9.0.
A photographing lens system comprising five lens elements, the five lens elements being, in order from an object side to an image side:
- a first lens element having positive refractive power;
- a second lens element;
- a third lens element having an object-side surface being convex in a paraxial region thereof;
- a fourth lens element having an object-side surface being convex in a paraxial region thereof;
- and
- a fifth lens element having an image-side surface being concave in a paraxial region thereof;
- wherein at least one of the five lens elements has at least one inflection point, a refractive power of the first lens element is P1, a refractive power of the second lens element is P2, a refractive power of the third lens element is P3, a refractive power of the fourth lens element is P4, a refractive power of the fifth lens element is P5, a central thickness of the second lens element is CT2, a central thickness of the fourth lens element is CT4, and the following conditions are satisfied:
- (|P3|+|P4|+|P5|)/(|P1|+|P2|)<0.80;
- 3.50<|P1|+|P2|<8.50;
- and
- 0.03<CT2/CT4<0.58.
A photographing lens system comprising five lens elements, the five lens elements being, in order from an object side to an image side:
- a first lens element having positive refractive power;
- a second lens element;
- a third lens element having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof;
- a fourth lens element having positive refractive power;
- and
- a fifth lens element;
- wherein at least one of the five lens elements has at least one inflection point, a maximum effective radius of an object-side surface of the first lens element is Y11, a maximum effective radius of an image-side surface of the fifth lens element is Y52, a refractive power of the first lens element is P1, a refractive power of the second lens element is P2, a refractive power of the third lens element is P3, a refractive power of the fourth lens element is P4, a refractive power of the fifth lens element is P5, a central thickness of the second lens element is CT2, a central thickness of the third lens element is CT3, a central thickness of the fourth lens element is CT4, a central thickness of the fifth lens element is CT5, and the following conditions are satisfied:
- 0.50<Y52/Y11<1.10;
- (|P3|+|P4|+|P5|)/(|P1|+|P2|)<0.60;
- and
- 1.80<(CT3+CT4)/(CT2+CT5)<7.0.
Dependencies are inferred from the claim text.