Lens assembly and electronic device including the same

Patent metadata

Field	Value
Publication number	US-12372744-B2
Application number	US-202117483062-A
Country	US
Kind code	B2
Filing date	Sep 23, 2021
Priority date	Jan 27, 2021
Publication date	Jul 29, 2025
Grant date	Jul 29, 2025

Abstract

Provided are a lens assembly and an electronic device including the lens assembly, the lens assembly including a first reflector configured to rotate around a first rotation axis, a second reflector configured to rotate around a second rotation axis, a plurality of lenses, and an image sensor configured to generate a plurality of captured images having different capturing views based on a rotation of at least one of the first reflector or the second reflector, in which the first reflector, the second reflector, the plurality of lenses, and the image sensor are provided in sequential order from an object's side.

First claim

What is claimed is:

1. A lens assembly comprising:
a first reflector configured to rotate around a first rotation axis;
a second reflector configured to rotate around a second rotation axis;
a plurality of lenses;
an image sensor configured to generate a plurality of captured images having different capturing angles based on a rotation of at least one of the first reflector and the second reflector; and
a processor,
wherein the first reflector, the second reflector, the plurality of lenses, and the image sensor are provided in sequential order,
wherein the plurality of lenses comprises a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, which are provided in sequential order,
wherein a distance from the first lens to the image sensor is TTL, a synthetic focal length of the lens assembly is f′, a focal length of the first lens is f1, a focal length of the second lens is f2, and the lens assembly satisfies:
TTL/f<1.0, and
0<(f1+f2)/f′<0.03,
wherein the image sensor is further configured to capture a predetermined number of telephoto sub-capturing regions included in a capturing region to generate the plurality of captured images, respectively, based on the rotation of at least one of the first reflector and the second reflector, and
wherein the processor is configured to synthesize the plurality of captured images into a synthesized image corresponding to a high-resolution wide-angle image.

2. The lens assembly of claim 1 , wherein a focal length of the third lens is f3, a focal length of the fourth lens is f4, and the lens assembly satisfies:
0.04<(f3+f4)/f′<0.06.

3. The lens assembly of claim 1 , wherein an Abbe number of the third lens is L3Ab, an Abbe number of the fourth lens is L4Ab, and the lens assembly satisfies:
19<L3Ab <25, and
19<L4Ab <25.

4. The lens assembly of claim 1 , wherein the first lens has positive refractive power with a convex form,
wherein the second lens has negative refractive power,
wherein the third lens has positive refractive power with a biconvex form,
wherein the fourth lens has negative refractive power, and
wherein the fifth lens has positive refractive power.

5. The lens assembly of claim 1 , wherein the plurality of captured images form different regions corresponding to the different capturing angles in the synthesized image.

6. The lens assembly of claim 1 , further comprising:
an aperture stop provided between the second reflector and the plurality of lenses, the aperture stop being configured to adjust an amount of light.

7. The lens assembly of claim 1 , wherein an aperture circle of each of the plurality of lenses is smaller than an image circle of the image sensor.

8. The lens assembly of claim 1 , wherein an aperture height of each of the plurality of lenses corresponding to positions through which rays provided in an image formation range corresponding to a short side of the image sensor pass the lenses respectively is less than or equal to the short side of the image sensor.

9. The lens assembly of claim 1 , wherein a short side of the image sensor is less than or equal to 7 millimeters.

10. An electronic device comprising:
an imaging assembly configured to sense visual information of an object by a lens assembly, the imaging assembly being configured to generate a captured image based on the visual information; and
a display configured to display the captured image,
wherein the lens assembly comprises:
a first reflector configured to rotate around a first rotation axis;
a second reflector configured to rotate around a second rotation axis;
a plurality of lenses;
an image sensor configured to generate a plurality of partially captured images having different capturing angles based on a rotation of at least one of the first reflector or the second reflector; and
a processor,
wherein the first reflector, the second reflector, the plurality of lenses, and the image sensor are provided in sequential order from a side of the object,
wherein the partially captured images are synthesized into the captured image, and
wherein the plurality of lenses comprises a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, which are provided in sequential order from the side of the object,
wherein a distance from the first lens to the image sensor is TTL, a synthetic focal length of the lens assembly is f′, a focal length of the first lens is f1, a focal length of the second lens is f2, and the lens assembly satisfies:

TTL/f′<1.0, and
0<(f1 +f2)/f′<0.03,
wherein the image sensor is further configured to capture a predetermined number of telephoto sub-capturing regions included in a capturing region to generate a plurality of captured images, respectively, based on the rotation of at least one of the first reflector and the second reflector, and
wherein the processor is configured to synthesize the plurality of captured images into a synthesized image corresponding to a high-resolution wide-angle image.

11. The electronic device of claim 10 , wherein a focal length of the third lens is f3, a focal length of the fourth lens is f4, and the lens assembly satisfies:
0.04<(f3+f4)/f′<0.06.

12. The electronic device of claim 10 , wherein an Abbe number of the third lens is L3Ab, an Abbe number of the fourth lens is L4Ab, and the lens assembly satisfies:
19<L3Ab<25, and
19<L4Ab<25.

13. The electronic device of claim 10 , wherein the first lens has positive refractive power with a convex form toward the side of the object,
wherein the second lens has negative refractive power,
wherein the third lens has positive refractive power with a biconvex form,
wherein the fourth lens has negative refractive power, and
wherein the fifth lens has positive refractive power.

14. The electronic device of claim 10 , wherein the lens assembly further comprises:
an aperture stop provided between the second reflector and the plurality of lenses, the aperture stop being configured to adjust an amount of light.

15. A capturing method comprising:
generating a plurality of partially captured images, by an image sensor, having different capturing angles by capturing a predetermined number of telephoto sub-capturing regions included in a capturing region respectively while adjusting a capturing angle by rotating at least one of a first reflector configured to rotate around a first rotation axis or a second reflector configured to rotate around a second rotation axis and passing through a plurality of lenses; and
generating a single synthesized image, by a processor, corresponding to a high-resolution wide-angle image based on the plurality of partially captured images.

16. The capturing method of claim 15 , wherein the plurality of partially captured images form different regions corresponding to the different capturing angles in the synthesized image.

17. A non-transitory computer-readable storage medium storing instructions that are executable by a processor to perform a capturing method, the capturing method comprising:
generating a plurality of partially captured images, by an image sensor, having different capturing angles by capturing a predetermined number of telephoto sub-capturing regions included in a capturing region respectively while adjusting a capturing angle by rotating at least one of a first reflector configured to rotate around a first rotation axis or a second reflector configured to rotate around a second rotation axis and passing through a plurality of lenses; and
generating a single synthesized image, by a processor, corresponding to a high-reso

Assignees

• Samsung Electronics Co Ltd

Inventors

• Lee Kiwoo
• Nam Dong Kyung

Classifications

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• G02B27/646

  compensating for small deviations, e.g. due to vibration or shake (movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68) · CPC title

• G02B13/06

  Panoramic objectives; So-called "sky lenses" {including panoramic objectives having reflecting surfaces} · CPC title

• H04N23/58

  Means for changing the camera field of view without moving the camera body, e.g. nutating or panning of optics or image sensors · CPC title

• G03B30/00

  Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles · CPC title