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CN-122029829-A - Imaging device and electronic device including the same

CN122029829ACN 122029829 ACN122029829 ACN 122029829ACN-122029829-A

Abstract

According to one embodiment of the present disclosure, an imaging device may include an image sensor, a lens assembly configured to focus or direct light to the image sensor by including at least five lenses aligned sequentially along an optical axis from a first lens furthest from the image sensor. In one embodiment, the lens assembly or at least five lenses may include a first lens having a positive refractive power, a second lens disposed between the first lens and the image sensor and having a negative refractive power, a third lens disposed between the second lens and the image sensor and having a negative refractive power, a fourth lens having a meniscus shape convex toward the image sensor and a shape in which a thickness of the fourth lens decreases toward an edge, wherein the fourth lens is disposed between the third lens and the image sensor and has a positive refractive power, and a fifth lens having a shape in which an object side surface is convex and a sensor side surface is concave in a central region, wherein the fifth lens is disposed between the fourth lens and the image sensor and has a negative refractive power. In one embodiment, by satisfying at least some of the conditions disclosed in this document, the lens assembly can be easily miniaturized while providing optical performance suitable for large/high pixel image sensors. Various other embodiments are also possible.

Inventors

  • XU ZHENXIAN
  • Pei Zaizhe

Assignees

  • 三星电子株式会社

Dates

Publication Date
20260512
Application Date
20240920
Priority Date
20231113

Claims (15)

  1. 1. Image capturing device 180;280;305;312;313;400;500;600;700; 800), comprising the following steps: an image sensor (1; 230), and A Lens Assembly (LA) configured to focus or direct light to the image sensor by comprising at least five lenses (L1, L2, L3, L4, L5) arranged sequentially along an optical axis (O) from a first lens (L1) furthest from the image sensor, Wherein the lens assembly or the at least five lenses comprise: the first lens has positive refractive power; a second lens (L2) disposed between the first lens and the image sensor and having a negative refractive power; a third lens (L3) disposed between the second lens and the image sensor and having a negative refractive power; A fourth lens (L4) having a meniscus shape convex toward the image sensor and having a thickness decreasing toward an edge of the fourth lens, and disposed between the third lens and the image sensor and having a positive refractive power, and A fifth lens (L5) having a shape including a convex object-side surface (S10) and a concave sensor-side surface in a main region of the fifth lens, disposed between the fourth lens and the image sensor, and having a negative refractive power, and Wherein the lens assembly satisfies the following conditional expression 1, [ Conditional expression 1] 1.5=<(T34+T45)/T23=<3 (Wherein "T23" is an air gap between the second lens and the third lens measured on the optical axis, "T34" is an air gap between the third lens and the fourth lens measured on the optical axis, and "T45" is an air gap between the fourth lens and the fifth lens measured on the optical axis).
  2. 2. The image capture device of claim 1, wherein at least one of the at least five lenses is a plastic lens.
  3. 3. The image capturing apparatus according to claim 1 or 2, wherein the lens assembly satisfies the following [ conditional expression 2], [ Conditional expression 2] 0.6=<OAL/(ImgH 2)=<0.69 (Wherein "OAL" is a distance from an object-side surface (S1) of the first lens to the image sensor measured on the optical axis, and "ImgH" is a maximum image height of the image sensor.
  4. 4. The image capturing apparatus according to any one of claims 1 to 3, wherein the lens assembly satisfies the following [ conditional expression 3 and conditional expression 4], [ Conditional expression 3] 1.7=<Fno=<1.9 [ Conditional expression 4] 35 Degrees= < hfov= <45 degrees (Where "Fno" is the F-number of the lens assembly and "HFOV" is half field of view).
  5. 5. The image capturing apparatus according to any one of claims 1 to 4, wherein the lens assembly satisfies the following [ conditional expression 5], [ Conditional expression 5] T4/TA=<0.17 (Wherein "T4" is the thickness of the fourth lens measured on the optical axis, and "TA" is the distance from the object-side surface of the first lens to the sensor-side surface of the fifth lens (S11) measured on the optical axis.
  6. 6. The image capturing apparatus according to any one of claims 1 to 5, wherein the lens assembly satisfies the following [ conditional expression 6], [ Conditional expression 6] 0=<(R7-R8)/(R7+R8)=<1 (Wherein "R7" is a radius of curvature of a point intersecting the optical axis on the object-side surface (S8) of the fourth lens, and "R8" is a radius of curvature of a point intersecting the optical axis on the sensor-side surface (S9) of the fourth lens.
  7. 7. The image capturing apparatus according to any one of claims 1 to 6, wherein the lens assembly satisfies the following [ conditional expression 7], [ Conditional expression 7] 0.3=<Et4/T4=<0.5 (Wherein "Et4" is an edge thickness of the fourth lens measured parallel to the optical axis, and "T4" is a thickness of the fourth lens measured on the optical axis).
  8. 8. The image capture device of any of claims 1-7, wherein the lens assembly further comprises an aperture stop (stop) disposed between the first lens and the third lens, and Wherein the lens assembly satisfies the following conditional expression 8, [ Conditional expression 8] 0.1=<ST/SL=<0.5 (Wherein "ST" is a distance from the object-side surface of the first lens to the aperture stop measured on the optical axis, and "SL" is a distance from the aperture stop to the sensor-side surface of the fifth lens measured on the optical axis).
  9. 9. The image capture device of any of claims 1 to 8, wherein the second lens has a refractive index of 1.6 or greater.
  10. 10. The image capturing device according to any of claims 1 to 9, wherein the first lens comprises a convex object side surface (S1) and a sensor side surface (S2), wherein the sensor side surface (S2) is concave in a main area of the first lens and convex in an edge area of the first lens.
  11. 11. The image capturing apparatus of any of claims 1-10, wherein the third lens has a meniscus shape convex toward the image sensor and a refractive index of 1.6 or greater.
  12. 12. The image capturing apparatus according to any of claims 1 to 11, wherein the fifth lens has a convex shape inclined toward the object side in an edge region of the fifth lens around a main region of the fifth lens, such that the fifth lens includes at least one Inflection Point (IP).
  13. 13. The image capturing device of any of claims 1-12, wherein the lens assembly further comprises an infrared cut-off filter (F) disposed between the fifth lens and the image sensor.
  14. 14. An electronic device (101; 102;104; 300) comprising: The image capturing device (180; 280;305;312;313;400;500;600;700; 800) according to any one of claims 1 to 13; Processor (120); and A memory (130) stores instructions that, when executed by the processor, cause the electronic device to receive light using the image sensor.
  15. 15. The electronic device of claim 14, wherein the memory further stores instructions that, when executed by the processor, cause the image capture device or the electronic device to perform a focus adjustment operation or a focal length adjustment operation by linearly moving at least one of the at least five lenses in a direction of the optical axis.

Description

Imaging device and electronic device including the same Technical Field Embodiments of the present disclosure relate to an image capturing apparatus, and for example, to an image capturing apparatus including a plurality of lenses and an electronic apparatus including the image capturing apparatus. Background Optical devices, such as cameras capable of capturing images or videos, have been widely used, and recently, digital cameras or video cameras having solid-state image sensors such as Charge Coupled Devices (CCDs) or Complementary Metal Oxide Semiconductors (CMOS) have become widespread. Optical devices employing solid-state image sensors (CCDs or CMOS) are increasingly replacing film-type optical devices because optical devices employing solid-state image sensors (CCDs or CMOS) are easier to store, copy, and move images than film-type optical devices. Recently, two or more optical devices selected from a plurality of optical devices (e.g., a macro camera, a telephoto camera, and/or a wide-angle camera) are mounted on a single electronic device to improve the quality of a captured image and provide various visual effects to the captured image. For example, a high-quality captured image can be obtained by obtaining object images via a plurality of cameras having different optical characteristics and synthesizing them. With obtaining a high-quality photographed image by installing a plurality of optical devices (e.g., cameras), electronic devices such as mobile communication terminals or smart phones are gradually replacing electronic devices dedicated to photographing functions such as digital compact cameras and the like, and are expected to be able to replace high-performance cameras such as Digital Single Lens Reflex (DSLR) cameras in the future. The above information is presented merely as a related art to aid in understanding the present disclosure. No determination is made, nor an assertion is made, as to whether any of the above may be used as prior art with respect to the present disclosure. Disclosure of Invention Technical proposal According to an embodiment of the present disclosure, an image capture device may include an image sensor and a lens assembly configured to focus or direct light to the image sensor by including at least five lenses, wherein the at least five lenses are sequentially arranged along an optical axis from a first lens furthest from the image sensor. In an embodiment, the lens assembly or the at least five lenses may include the first lens having a positive refractive power, a second lens disposed between the first lens and the image sensor and having a negative refractive power, a third lens disposed between the second lens and the image sensor and having a negative refractive power, a fourth lens having a meniscus shape that is convex toward the image sensor and has a thickness that decreases toward an edge of the fourth lens, disposed between the third lens and the image sensor, and having a positive refractive power, and a fifth lens having a shape that includes a convex object-side surface and a concave sensor-side surface in a main area of the fifth lens, disposed between the fourth lens and the image sensor, and having a negative refractive power. In an embodiment, the lens assembly may satisfy the following [ conditional expression 1]. [ Conditional expression 1] 1.5=<(T34+T45)/T23=<3 Here, "T23" may be an air gap between the second lens and the third lens measured on the optical axis, "T34" may be an air gap between the third lens and the fourth lens measured on the optical axis, and "T45" may be an air gap between the fourth lens and the fifth lens measured on the optical axis. According to an embodiment of the present disclosure, an electronic device may include an image sensor, a lens assembly configured to focus or direct light to the image sensor by including at least five lenses, wherein the at least five lenses are sequentially arranged along an optical axis from a first lens furthest from the image sensor, a processor, and a memory storing instructions that, when executed by the processor, cause the electronic device to receive light using the image sensor. In an embodiment, the lens assembly or the at least five lenses may include the first lens having a positive refractive power, a second lens disposed between the first lens and the image sensor and having a negative refractive power, a third lens disposed between the second lens and the image sensor and having a negative refractive power, a fourth lens having a meniscus shape that is convex toward the image sensor and has a thickness that decreases toward an edge of the fourth lens, disposed between the third lens and the image sensor, and having a positive refractive power, and a fifth lens having a shape that includes a convex object-side surface and a concave sensor-side surface in a main area of the fifth lens, disposed between the fourth lens and the image sensor, and having a negative refractive