Imaging lens system, image capturing unit and electronic device
AssigneeLargan Precision Co., Ltd.
InventorsHsiang-Chi Tang, Cheng-Chen Lin, Chun-Yen Chen, Hsin-Hsuan Huang
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Abstract
An imaging lens system includes six 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, a fifth lens element and a sixth lens element. The sixth lens element has an image-side surface being concave in a paraxial region thereof. The image-side surface of the sixth lens element has at least one inflection point.
Claims30
An imaging lens system comprising six lens elements, the six lens elements being, 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 sixth lens element having an image-side surface being concave in a paraxial region thereof, and the image-side surface of the sixth lens element having at least one inflection point;
- wherein an axial distance between an object-side surface of the first lens element and an image surface is TL, a maximum image height of the imaging lens system is ImgH, an entrance pupil diameter of the imaging lens system is EPD, an Abbe number of the first lens element is V1, an Abbe number of the second lens element is V2, an Abbe number of the third lens element is V3, an Abbe number of the fourth lens element is V4, a focal length of the imaging lens system is f, a focal length of the fifth lens element is f5, and the following conditions are satisfied:
- 1.0<(TL)2/(ImgH×EPD)<5.0;
- 3.50<[(V1−V3)×(V1−V4)]/[(V3−V2)×(V4−V2)]<220;
- 1.0<TL/EPD<2.50;
- and
- −0.10<f/f5<2.50.
An imaging lens system comprising six lens elements, the six lens elements being, 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 second lens element having negative refractive power, the sixth lens element having an image-side surface being concave in a paraxial region thereof, and the image-side surface of the sixth lens element having at least one inflection point;
- wherein an axial distance between an object-side surface of the first lens element and an image surface is TL, a maximum image height of the imaging lens system is ImgH, an entrance pupil diameter of the imaging lens system is EPD, an Abbe number of the third lens element is V3, an Abbe number of the fourth lens element is V4, a focal length of the imaging lens system is f, a focal length of the third lens element is f3, and the following conditions are satisfied:
- 1.0<(TL)2/(ImgH×EPD)<3.40;
- 10.0<V3<35.0;
- 10.0<V4<35.0;
- and
- −1.50<f/f3<0.90.
Dependencies are inferred from the claim text.