Monofocal photographing lens assembly
AssigneeLargan Precision Co., Ltd.
InventorHsin-Hsuan Huang
Life of this patent
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Abstract
A monofocal photographing lens assembly includes, 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, a fifth lens element and a sixth lens element. The first lens element with negative refractive power has a concave image-side surface. The second lens element has refractive power. The third lens element has refractive power. The fourth lens element has refractive power. The fifth lens element has negative refractive power. The sixth lens element with positive refractive power has a convex image-side surface.
Claims25
A monofocal photographing lens assembly comprising, in order from an object side to an image side:
- a first lens element with negative refractive power having a concave image-side surface;
- a second lens element with refractive power;
- a third lens element with refractive power;
- a fourth lens element with refractive power;
- a fifth lens element with negative refractive power;
- and
- a sixth lens element with positive refractive power having a convex image-side surface;
- wherein a sum of central thicknesses of the first through sixth lens elements is ΣCT, an axial distance between an object-side surface of the first lens element and the image-side surface of the sixth lens element is Td, a focal length of the monofocal photographing lens assembly is f, a focal length of the first lens element is f1, an f-number of the monofocal photographing lens assembly is Fno, and the following relationships are satisfied:
- 1.0<Td/ΣCT<1.35;
- −1.5<f/f1<−0.6, and
- 1.5<Fno<3.0.
A monofocal photographing lens assembly comprising, in order from an object side to an image side:
- a front lens group, comprising in order form an object side to an image side:
- a first lens element with negative refractive power having a concave image-side surface;
- and
- a second lens element with refractive power;
- a stop;
- and
- a rear lens group, comprising in order from an object side to an image side:
- a third lens element with refractive power having a convex image-side surface;
- a fourth lens element with refractive power;
- a fifth lens element with negative refractive power;
- and
- a sixth lens element with positive refractive power having a convex image-side surface;
- wherein a sum of central thicknesses of the first through sixth lens elements is ΣCT, an axial distance between an object-side surface of the first lens element and the image-side surface of the sixth lens element is Td, a focal length of the monofocal photographing lens assembly is f, a focal length of the first lens element is f1, and the following relationships are satisfied:
- 1.0<Td/ΣCT<1.35;
- and
- −1.5<f/f1<−0.6.
Dependencies are inferred from the claim text.