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US-20260126621-A1 - CAMERA MODULE AND ELECTRONIC DEVICE COMPRISING SAME

US20260126621A1US 20260126621 A1US20260126621 A1US 20260126621A1US-20260126621-A1

Abstract

A camera including a lens assembly including at least three lenses; and an image sensor that receives light guided by the lens assembly. The at least three lenses are aligned along an optical axis direction from an object to be captured by the camera to the image sensor, and among the at least three lenses, a first lens provided closest to the object has a positive refractive power and an object side surface of the first lens facing the object has a concave shape

Inventors

  • Dongwoo Kim
  • Jaecheol BAE

Assignees

  • SAMSUNG ELECTRONICS CO., LTD.

Dates

Publication Date
20260507
Application Date
20260105
Priority Date
20230705

Claims (15)

  1. 1 . A camera comprising: a lens assembly comprising at least three lenses; and an image sensor configured to receive light guided by the lens assembly, wherein the at least three lenses are aligned along an optical axis direction from an object to be captured by the camera to the image sensor, wherein, among the at least three lenses, a first lens provided closest to the object has a positive refractive power and an object side surface of the first lens facing the object has a concave shape, wherein the camera satisfies the following formula 1: 0.6 ≤ ( L 1 - 3 ) ⁢ f BFL ≤ 1.6 , where ‘L 1-3 ’ is a distance from the object side surface of the first lens to an imaging side surface of a second lens, among the at least three lenses, farthest from the object, ‘f’ is a focal length of the camera, ‘BFL’ is a distance from the imaging side surface of the second lens to an imaging plane of the image sensor, and wherein the imaging side surface of the second lens faces the image sensor.
  2. 2 . The camera of claim 1 , wherein the at least three lenses comprises a third lens provided between the first lens and the second lens, wherein the second lens has a negative refractive power, and the third lens has a positive refractive power.
  3. 3 . The camera of claim 1 , comprising: an aperture provided between the first lens and the object, wherein a field of view (FOV) of the camera is greater than or equal to 70 degrees and less than or equal to 90 degrees.
  4. 4 . The camera of claim 1 , wherein the camera further satisfies the following formula 2: 0 . 6 ≤ L 1 - 3 IH ≤ 2. , where ‘IH’ is a maximum height of the imaging plane.
  5. 5 . The camera of claim 1 , wherein the camera further satisfies the following formula 3: 0.6 ≤ BFL f ≤ 1.2 .
  6. 6 . The camera of claim 1 , wherein an Abbe's number of the first lens satisfies the following formula 4: 50 ≤ V d ⁢ 1 ≤ 60 , where ‘V d1 ’ is an Abbe's number of the first lens.
  7. 7 . The camera of claim 1 , wherein the first lens is a meniscus shaped lens having both the object side surface and an imaging side surface concave toward the object.
  8. 8 . The camera of claim 2 , wherein the third lens is a meniscus-shaped lens having both an object side surface and an imaging side surface concave toward the object.
  9. 9 . The camera of claim 2 , wherein the third lens has a refractive index that satisfies the following formula: 1.6 ≤ nd ⁢ 2 ≤ 1.75 , where ‘nd2’ is a refractive index of the second lens, and wherein the third lens is formed of a synthetic resin material.
  10. 10 . The camera of claim 1 , wherein the second lens has an object side surface convex toward the object and the imaging side surface convex toward the image sensor.
  11. 11 . The camera of claim 1 , wherein the at least three lenses are formed of a synthetic resin material.
  12. 12 . The camera of claim 1 , wherein the camera is a fixed-focus-type camera.
  13. 13 . The camera of claim 1 , further comprising: a filter comprising an IR cut filter or a band pass filter.
  14. 14 . The camera of claim 1 , further comprising: a cover glass provided on at least a portion of the image sensor.
  15. 15 . An electronic device comprising: a processor; and a camera comprising: a lens assembly comprising at least three lenses; and an image sensor configured to receive light guided by the lens assembly, wherein the at least three lenses are aligned along an optical axis direction from an object to be captured by the camera to the image sensor, wherein, among the at least three lenses, a first lens provided closest to the object has a positive refractive power and an object side surface of the first lens facing the object has a concave shape, wherein the camera satisfies the following formula 1: 0.6 ≤ ( L 1 - 3 ) ⁢ f BFL ≤ 1.6 , where ‘L 1-3 ’ is a distance from the object side surface of the first lens to an imaging side surface of a second lens, among the at least three lenses, farthest from the object, ‘f’ is a focal length of the camera, ‘BFL’ is a distance from the imaging side surface of the second lens to an imaging plane of the image sensor, wherein the imaging side surface of the second lens faces the image sensor, and wherein the processor is configured to control the camera to obtain an image of the object.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) This application is a bypass continuation of International Application No. PCT/KR2024/009605, filed on Jul. 5, 2024, which is based on and claims priority from Korean Patent Application No. 10-2023-0087255, filed on Jul. 5, 2023 and Korean Patent Application No. 10-2023-0112302, filed on Aug. 25, 2023, in the Korean Intellectual Property Office, the disclosures of which are incorporated by reference herein in their entireties. BACKGROUND 1. Field Various embodiments of the disclosure relate to a camera module that may be mounted on an electronic device, and an electronic device including same. 2. Description of Related Art As electronic, information, and communication technologies advance, various functions are being integrated into a single electronic device. For example, an electronic device (e.g., a smartphone) may function as a sound reproduction device, an image capturing device, or an electronic notebook in addition to functioning as a communication device. As such, an electronic device (such as a smart phone) may be implemented with diverse functions through additional installation of applications and/or other hardware components. In addition to executing installed applications or stored functions, an electronic device may receive various information in real time by accessing a server or other electronic devices in a wired or wireless manner. The increasing use of electronic devices in daily life has led to growing user demands for portability and usability of electronic devices. To satisfy such user demands, electronic devices that may be carried and used while worn on the body, similar to wristwatches or glasses (hereinafter referred to as “wearable electronic devices”), have become commercialized. Examples of wearable electronic devices may include head-mounted wearable devices (HMDs), smart glasses, smart watches (or bands), contact lens-type devices, ring-type devices, clothing/shoe/glove-type devices, and the like. These body-worn electronic devices are portable and may improve user accessibility. A “head-mounted wearable device” is a device that is worn on the head or the face of the user and projects an image onto a retina of the user, allowing the user to view a virtual image in a three-dimensional space. For example, head-mounted wearable devices may be categorized into see-through types that provide augmented reality (AR) and see-closed types that provide virtual reality (VR). A see-through type head-mounted wearable device may be implemented in the form of glasses, for example and may provide the user with information about buildings, objects, or the like in the form of images or text in the space within a field of view of the user. The see-closed type head-mounted wearable device outputs independent images to each eye of the user, providing exceptional immersion by delivering contents (such as games, movies, streaming, or broadcasts) from a mobile communication terminal or external input in the form of video or audio to a single user wearing the device. Additionally, head-mounted wearable devices may also be used to provide mixed reality (MR), which combines augmented reality (AR) and virtual reality (VR), or extended reality (XR). The above-described information may be provided as related art for the purpose of assisting in understanding the disclosure. None of the above contents make an assertion or decision as to whether any of the above might be applicable as prior art with regard to the disclosure. SUMMARY According to an aspect of the disclosure, there is provided a camera including: a lens assembly including at least three lenses; and an image sensor configured to receive light guided by the lens assembly, wherein the at least three lenses are aligned along an optical axis direction from an object to be captured by the camera to the image sensor, wherein, among the at least three lenses, a first lens provided closest to the object has a positive refractive power and an object side surface of the first lens facing the object has a concave shape, wherein the camera satisfies the following formula 1: 0.6≤(L1-3)⁢fBFL≤1.6, where ‘L1-3’ is a distance from the object side surface of the first lens to an imaging side surface of a second lens, among the at least three lenses, farthest from the object, ‘f’ is a focal length of the camera, ‘BFL’ is a distance from the imaging side surface of the second lens to an imaging plane of the image sensor, and wherein the imaging side surface of the second lens faces the image sensor. According to another aspect of the disclosure, there is provided an electronic device including: a processor; and a camera including a lens assembly including at least three lenses; and an image sensor configured to receive light guided by the lens assembly, wherein the at least three lenses are aligned along an optical axis direction from an object to be captured by the camera to the image sensor, wherein, among the at least th