BR-102025005418-A2 - Optical image capture system, imaging apparatus and electronic device

BR102025005418A2BR 102025005418 A2BR102025005418 A2BR 102025005418A2BR-102025005418-A2

Abstract

An optical image capture system includes an assembly of optical image capture lenses and at least two aperture holes, respectively corresponding to a first mode and a second mode. The assembly of optical image capture lenses includes, in order from object side to image side, an object-side lens group, a first light path bending element, and a junction lens group. The object-side lens group is either a first-mode object-side lens group or a second-mode object-side lens group; the junction lens group sequentially includes a middle lens group and a last lens group.

Inventors

Yu-Chun KE
Yu-Han SHIH

Assignees

LARGAN PRECISION CO., LTD.

Dates

Publication Date: 20260317
Application Date: 20250320
Priority Date: 20240531

Claims (20)

1. Optical image capture system, CHARACTERIZED BY comprising a set of optical image capture lenses and at least two aperture holes, respectively corresponding to a first mode and a second mode; wherein the set of optical image capture lenses comprises, in order from an object side to an image side, an object-side lens group, a first light path bending element and a junction lens group, wherein the object-side lens group is a first-mode object-side lens group or a second-mode object-side lens group, the junction lens group sequentially comprises a middle lens group and a last lens group; wherein when the set of optical image capture lenses is in the first mode, the light is received by one of at least two aperture holes, and the set of optical image capture lenses comprises, in order along an optical path, the first-mode object-side lens group, the first light path bending element and the junction lens group; When the optical image capture lens assembly is in the second mode, light is received by one or more of the at least two aperture holes, and the optical image capture lens assembly comprises, in order along the optical path, the second mode object-side lens group, the first light path bending element, and the junction lens group; wherein the first light path bending element moves along the optical path, causing the optical image capture lens assembly to alternate between the first mode and the second mode; wherein the first mode object-side lens group, the second mode object-side lens group, the middle lens group, and the last lens group all comprise at least one lens element, each of at least one lens element having an object-side surface facing the object side and an image-side surface facing the image side; wherein at least two of the lens elements in the optical image capture lens assembly are made of plastic material.
2. Optical image capture system, according to claim 1, CHARACTERIZED IN THAT at least one of the first mode and the second mode has a plurality of capture states, the plurality of capture states respectively capturing images at a distance greater than an object distance of 1000 mm and within an object distance of 350 mm, the lens element of the optical image capture lens assembly closest to an image surface comprising at least one inflection point.
3. Optical image capture system, according to claim 1, CHARACTERIZED BY comprising, without adding one or more lens elements inserted between the junction lens group and an image surface; when an object distance is defined as an infinite capture state, when the optical image capture lens set is changed between the first mode and the second mode, a movable distance along the optical path of the first light path bending element related to the last lens group is TPM12, an axial length on the first light path bending element is CTP1, and the following condition is satisfied:
4. Optical image capture system, according to claim 1, CHARACTERIZED BY a maximum image height of the optical image capture lens assembly in the first mode being ImgH1, a maximum image height of the optical image capture lens assembly in the second mode being ImgH2, and the following condition being satisfied:
5. Optical image capture system, according to claim 1, CHARACTERIZED BY comprising a second light path bending element between the last lens group and an image surface, the maximum number of lens elements in the object-side lens group of the first mode being two, the maximum number of lens elements in the object-side lens group of the second mode being three, and the number of lens elements in the junction lens group being six.
6. Optical image capture system, according to claim 3, CHARACTERIZED IN the lens element of the optical image capture lens assembly closest to the object side being a positive lens element, the lens element of the junction lens group closest to the object side being a positive lens element, a difference between the maximum field of view of the first mode and the second mode being at least 2.0 times or more than 2.0 times.
7. Optical image capture system, according to claim 1, CHARACTERIZED IN THAT the object-side lens group of the first mode and the object-side lens group of the second mode are both fixed relative to the last lens group, the middle lens group moves along the optical path related to the last lens group.
8. Optical image capture system, according to claim 1, CHARACTERIZED IN that in the first mode and in the second mode, when an object distance is defined as an infinite capture state, a sum of three values of a total focal length of the optical image capture lens set respectively divided by the focal lengths of the three lens elements closest to an image surface is ∑PGn, and the following condition is satisfied:
9. Optical image capture system, according to claim 1, CHARACTERIZED IN THAT the first mode and the second mode use the same image sensor, the lens element of the optical image capture lens assembly closest to an image surface is a negative lens element.
10. Optical image capture system, according to claim 1, CHARACTERIZED IN THAT at least one of the lens elements in the optical image capture lens assembly comprises at least one critical point; when the optical image capture lens assembly is in a single mode, an axial distance between a lens element surface of the lens group on the object side closest to the object side and a lens element surface of the lens group on the object side closest to the image side is DGA, and the following condition is satisfied:
11. Optical image capture system, according to claim 1, CHARACTERIZED BY at least three of the lens elements in the optical image capture lens assembly being made of plastic material; in all modes and all states of the optical image capture lens assembly, a maximum axial distance between a lens element surface closest to the object side to an image surface is TLmax, in all central thicknesses of all lens elements in the optical image capture lens assembly, a maximum central thickness value of the lens element is CTmax, in all modes and all states of the optical image capture lens assembly, a minimum effective optical radii of the lens element surface closest to the object side is YGAR1min, and the following conditions are satisfied:
12. Optical image capture system, according to claim 5, CHARACTERIZED IN THAT the first light path bending element and the second light path bending element are both prisms, there is an air gap along an optical axis between two of the adjacent lens elements in the optical image capture lens assembly.
13. Imaging apparatus, CHARACTERIZED BY comprising: an optical image capture system, as defined in claim 1; and an image sensor disposed on an image surface of the optical image capture system.
14. Electronic device, CHARACTERIZED BY comprising: an imaging apparatus, as defined in claim 13.
15. Optical image capture system, CHARACTERIZED BY comprising a set of optical image capture lenses, respectively corresponding to a first mode and a second mode; wherein the set of optical image capture lenses comprises, in order from an object side to an image side, an object-side lens group and a junction lens group, wherein the object-side lens group is either a first-mode object-side lens group or a second-mode object-side lens group, the junction lens group sequentially comprising a middle lens group and a last lens group; wherein when the set of optical image capture lenses is in the first mode, there is, in order along an optical path, the first-mode object-side lens group and the junction lens group; when the set of optical image capture lenses is in the second mode, there is, in order along the optical path, the second-mode object-side lens group and the junction lens group; wherein the object-side lens group of the first mode, the object-side lens group of the second mode, the middle lens group, and the last lens group all comprise at least one lens element, each of at least one lens element having an object-side surface facing the object side and an image-side surface facing the image side; wherein at least two of the lens elements in the optical image-capturing lens assembly are made of plastic material; wherein the maximum number of lens elements in the object-side lens group of the first mode is two, the maximum number of lens elements in the object-side lens group of the second mode is two, the number of lens elements in the junction lens group is six, the six lens elements being sequentially 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; wherein the center thickness of the first lens element is CT1, the center thickness of the fifth lens element is CT5, the axial distance between the first lens element and the second lens element is T12, and the following condition is satisfied:
16. Optical image capture system, according to claim 15, CHARACTERIZED IN THAT the lens element of the optical image capture lens assembly closest to the object side is a positive lens element, the fourth lens element has negative refractive power, and the image side surface of the second lens element is concave.
17. Optical image capture system, according to claim 15, CHARACTERIZED IN THAT the optical image capture lens assembly comprises only the object-side lens group and the junction lens group; when the optical image capture lens assembly is in a single mode, an axial distance between a lens element surface of the object-side lens group closest to the image side and a lens element surface of the junction lens group closest to the object side is TGAB, in the junction lens group, an axial distance between a lens element surface closest to the object side and a lens element surface closest to the image side is DGB, and the following condition is satisfied:
18. Optical image capture system, according to claim 15, CHARACTERIZED BY a refractive index of the fifth lens element in a line d being N5, a focal length of the first lens element being f1, a focal length of the second lens element being f2, a focal length of the fourth lens element being f4, and the following conditions being satisfied:
19. Optical image capture system, according to claim 15, CHARACTERIZED IN the central thickness of the first lens element being CT1, the central thickness of the sixth lens element being CT6, and the following condition being satisfied:
20. Optical image capture system, according to claim 16, CHARACTERIZED IN WHICH when the optical image capture lens assembly is in a single mode, an axial distance between a lens element surface of the lens group on the object side closest to the object side and a lens element surface of the lens group on the object side closest to the image side is DGA, in the first mode and the second mode, the central thickness of the first lens element is CT1, and the following condition is satisfied:

Description

Technical Field [0001] This disclosure relates to an optical image capture system and an imaging apparatus. More particularly, this disclosure relates to an optical image capture system and an imaging apparatus with a compact size and applicable to electronic devices. Description of the Related Technique [0002] With recent advances in semiconductor process technology, the performance of image sensors is enhanced, allowing for the achievement of the smallest pixel size. Therefore, optical lens assemblies with high image quality have become an indispensable part of many modern electronics. With the rapid development of technology, the applications of electronic devices equipped with optical lens assemblies are becoming wider, and there is a greater variety of requirements for optical lens assemblies. However, in a conventional optical lens assembly, it is difficult to balance image quality, sensitivity, aperture size, volume, or field of view. Therefore, this disclosure provides an optical lens assembly with high image quality to meet these requirements. [0003] In recent years, with the demands for compact electronic devices, conventional photographic lens assemblies have failed to meet both the requirements of high-end specifications and compactness, especially microlens assemblies with a large aperture stop or a telephoto feature. Conventional telephoto lens assemblies fail to meet the requirements (due to excessive total path distance, small aperture stop, low image quality, or lack of compactness), so arrangements with different optical properties or the ability to bend the optical axis are needed. Due to the thickness limitations of electronic devices, the lens cylinders or lens elements of some optical lens assemblies will be cut to reduce the single-axis length, which is favorable for saving module space. In addition, reflective elements can be used to provide different optical paths for the system, which gives the optical lens assembly more flexible spaces to perform the long focal length telephoto effect. SUMMARY [0004] According to one aspect of the present disclosure, an optical image capture system includes an assembly of optical image capture lenses and at least two aperture holes, respectively corresponding to a first mode and a second mode. The assembly of optical image capture lenses includes, in order from an object side to an image side, an object-side lens group, a first light path bending element, and a junction lens group, wherein the object-side lens group is either a first-mode object-side lens group or a second-mode object-side lens group, the junction lens group sequentially includes a middle lens group and a last lens group. When the optical image capture lens assembly is in the first mode, light is received by one of at least two aperture holes, and the optical image capture lens assembly includes, in order along an optical path, the object-side lens group of the first mode, the first light path bending element, and the junction lens group. When the optical image capture lens assembly is in the second mode, light is received by another of the at least two aperture holes, and the optical image capture lens assembly includes, in order along the optical path, the object-side lens group of the second mode, the first light path bending element, and the junction lens group. The first light path bending element moves along the optical path, causing the optical image capture lens assembly to alternate between the first and second modes. The object-side lens group of the first mode, the object-side lens group of the second mode, the middle lens group, and the last lens group all include at least one lens element, each of which has at least one object-side surface facing the object side and an image-side surface facing the image side. At least two of the lens elements in the optical image-capturing lens assembly are preferably made of plastic material. [0005] According to another aspect of the present disclosure, an imaging apparatus includes the optical image capture system of the previously mentioned aspect and an image sensor, wherein the image sensor is disposed on an image surface of the optical image capture system. [0006] According to another aspect of the present disclosure, an electronic device includes the imaging apparatus of the aspect previously mentioned. [0007] According to yet another aspect of the present disclosure, an optical image capture system includes a set of optical image capture lenses, respectively corresponding to a first mode and a second mode. The set of optical image capture lenses includes, in order from an object side to an image side, an object-side lens group and a junction lens group, wherein the object-side lens group is either a first-mode object-side lens group or a second-mode object-side lens group, the junction lens group sequentially includes a middle lens group and a last lens group. When the set of optical image capture lenses is in the first mode,