US 12,748,291 B2Granted

Imaging system lens assembly, imaging apparatus and electronic device

AssigneeLargan Precision Co., Ltd.

InventorsShih-Han Chen, Cheng-Yu Tsai, Hsin-Hsuan Huang

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Abstract

An imaging system lens assembly includes a first lens group and a second lens group. The first lens group includes a first catadioptric lens element and a second catadioptric lens element, the second lens group includes at least one lens element. Each of an object-side surface and an image-side surface of the first catadioptric lens element and the second catadioptric lens element includes a central region and a peripheral region. The peripheral region of the object-side surface of the first catadioptric lens element includes a first refracting surface. The peripheral region of the image-side surface of the second catadioptric lens element includes a first reflecting surface. The central region of the object-side surface of the first catadioptric lens element includes a second reflecting surface. The central region of the image-side surface of the second catadioptric lens element includes a last refracting surface.

Claims27

Dependent claims

An imaging system lens assembly, comprising two lens groups, the two lens groups being, in order from an object side to an image side along a light path, a first lens group and a second lens group;

wherein the first lens group comprises a first catadioptric lens element and a second catadioptric lens element;
wherein the second lens group comprises at least two lens elements;
wherein each of the first catadioptric lens element and the second catadioptric lens element has an object-side surface facing towards the object side and an image-side surface facing towards the image side;
wherein the object-side surface of the first catadioptric lens element comprises a central region and a peripheral region, and the image-side surface of the first catadioptric lens element comprises a central region and a peripheral region;
wherein the object-side surface of the second catadioptric lens element comprises a central region and a peripheral region, and the image-side surface of the second catadioptric lens element comprises a central region and a peripheral region;
wherein the peripheral region of the object-side surface of the first catadioptric lens element comprises a first refracting surface, the peripheral region of the image-side surface of the second catadioptric lens element comprises a first reflecting surface, the central region of the object-side surface of the first catadioptric lens element comprises a second reflecting surface, the central region of the image-side surface of the second catadioptric lens element comprises a last refracting surface;
wherein an axial distance between the second reflecting surface and an image surface is TL, a maximum image height of the imaging system lens assembly is ImgH, and the following condition is satisfied:
TL/ImgH<6.0

5 more elements

An imaging system lens assembly, comprising two lens groups, the two lens groups being, in order from an object side to an image side along a light path, a first lens group and a second lens group;

wherein the first lens group comprises a first catadioptric lens element and a second catadioptric lens element, the second lens group comprises at least one lens element;
wherein each of the first catadioptric lens element and the second catadioptric lens element has an object-side surface facing towards the object side and an image-side surface facing towards the image side;
wherein the object-side surface of the first catadioptric lens element comprises a central region and a peripheral region, and the image-side surface of the first catadioptric lens element comprises a central region and a peripheral region;
wherein the object-side surface of the second catadioptric lens element comprises a central region and a peripheral region, and the image-side surface of the second catadioptric lens element comprises a central region and a peripheral region;
wherein the peripheral region of the object-side surface of the first catadioptric lens element comprises a first refracting surface, the peripheral region of the image-side surface of the second catadioptric lens element comprises a first reflecting surface, the central region of the object-side surface of the first catadioptric lens element comprises a second reflecting surface, the central region of the image-side surface of the second catadioptric lens element comprises a last refracting surface;
the second catadioptric lens element has the object-side surface being convex in a paraxial region thereof.

3 more elements

Dependencies are inferred from the claim text.