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KR-20260066600-A - OPTICAL SYSTEM AND ELECTRONIC DEVICE INCLUDING THE SAME

KR20260066600AKR 20260066600 AKR20260066600 AKR 20260066600AKR-20260066600-A

Abstract

According to one embodiment of the present disclosure, an electronic device may be provided. The electronic device may include an optical system. The optical system may include a plurality of lenses, including a first lens and a second lens, sequentially arranged along an optical axis in a direction from the subject side toward the image side; an image sensor including an image plane on which an image is formed; and an optical member disposed between the plurality of lenses and the image sensor and configured to change the path of light passing through the plurality of lenses at least once. The optical system may satisfy the following [Equation 1]. [Equation 1] 0.5 < OTTL/ImgH < 1.1 (Here, OTTL is the distance from the vertex of the subject-side surface of the first lens to the vertex of the image-side surface of the lens closest to the image side among the plurality of lenses, and ImgH is the effective image height of the image sensor).

Inventors

  • 이용재

Assignees

  • 삼성전자주식회사

Dates

Publication Date
20260512
Application Date
20250227
Priority Date
20241104

Claims (20)

  1. In an electronic device (101) comprising an optical system (300; 400; 500; 600), The above optical system is, A plurality of lenses (G), including a first lens (L1) and a second lens (L2), sequentially arranged along an optical axis (OI) in a direction from the object (obj) side toward the image (I) side; An image sensor (IS) including an image plane (img) on which an image (I) is formed; and It includes an optical member (M) disposed between the plurality of lenses and the image sensor and configured to change the path of light passing through the plurality of lenses at least once, and The above optical system is an electronic device satisfying the following [Equation 1]. [Equation 1] 0.5 < OTTL/ImgH < 1.1 (Here, OTTL is the distance from the vertex of the subject side surface (S2) of the first lens to the vertex of the upper side surface of the lens closest to the upper side among the plurality of lenses, and ImgH is the effective image height of the image sensor).
  2. In Article 1, The above first lens is an electronic device satisfying the following [Equation 2] and [Equation 3]. [Equation 2] 1.45 < Nd_1 < 2.00 [Equation 3] 25 < Vd_1 < 90 (Here, Nd_1 in [Equation 2] is the refractive index of the first lens, and Vd_1 in [Equation 3] is the dispersion value of the first lens).
  3. In Article 1 or Article 2, The above first lens is an electronic device having positive refractive power.
  4. In any one of paragraphs 1 to 3, The above second lens is an electronic device having a defined refractive power.
  5. In any one of paragraphs 1 to 4, An electronic device in which the subject side surface (S4) of the second lens is convex toward the subject side, and the image side surface (S5) of the second lens is convex toward the subject side.
  6. In any one of paragraphs 1 to 5, The third lens (L3) positioned third from the subject side among the plurality of lenses above is an electronic device satisfying the following [Equation 4]. [Equation 4] -10 < f_tot/f_3 < -1.7 (Here, f_tot is the total focal length of the plurality of lenses (G), and f_3 is the focal length of the third lens).
  7. In any one of paragraphs 1 through 6, An electronic device configured to perform a focus adjustment operation by moving at least some of the plurality of lenses in a first direction in which the plurality of lenses are arranged.
  8. In any one of paragraphs 1 through 7, An electronic device configured to perform optical image stabilization (OIS) by moving at least some of the plurality of lenses in at least one direction perpendicular to a first direction in which the plurality of lenses are arranged.
  9. In any one of paragraphs 1 through 8, An electronic device configured to perform optical image stabilization (OIS) by moving or rotating the above-mentioned optical member.
  10. In any one of paragraphs 1 through 9, An electronic device in which the third lens (L3), positioned third from the subject side among the plurality of lenses above, has negative refractive power.
  11. In any one of paragraphs 1 through 10, The above optical member is an electronic device comprising one or more reflective surfaces (M2; E1, E2, E3, E4, E5).
  12. In any one of paragraphs 1 through 11, The imaging plane of the above image sensor is an electronic device arranged parallel to a first direction in which the plurality of lenses are arranged.
  13. In any one of paragraphs 1 to 12, The above optical system further comprises an aperture (sto) positioned around the edge of the image side surface (S7 or S9) of the lens (L3 or L4) closest to the image side among the plurality of lenses, or positioned to be aligned with the vertex of the image side surface (S7 or S9).
  14. In an optical system (300; 400; 500; 600), A plurality of lenses (G) sequentially arranged along an optical axis (OI) in a direction from the object (obj) side toward the image (I) side, comprising a first lens (L1) having a positive refractive power, a second lens (L2) having a positive refractive power, and a third lens (L3) having a negative refractive power; An image sensor (IS) including an image plane (img) on which an image (I) is formed; and It includes an optical member (M) disposed between the plurality of lenses and the image sensor and configured to change the path of light passing through the plurality of lenses at least once, and The above optical system is an optical system satisfying the following [Equation 1] [Equation 1] 0.5 < OTTL/ImgH < 1.1 (Here, OTTL is the distance from the subject-side vertex of the first lens to the upper vertex of the lens closest to the upper side among the plurality of lenses, and ImgH is the effective image height).
  15. In Article 14, The above first lens is an optical system satisfying the following [Equation 2] and [Equation 3] [Equation 2] 1.45 < Nd_1 < 2.00 [Equation 3] 25 < Vd_1 < 90 (Here, Nd_1 in [Equation 2] is the refractive index of the first lens, and Vd_1 in [Equation 3] is the dispersion value of the first lens).
  16. In Article 14 or Article 15, An optical system in which the subject-side surface of the second lens is convex toward the subject, and the image-side surface of the second lens is convex toward the subject.
  17. In any one of paragraphs 14 through 16, The above third lens is an optical system satisfying the following [Equation 4] [Equation 4] -10 < f_tot/f_3 < -1.7 (Here, f_tot is the total focal length of the plurality of lenses, and f_3 is the focal length of the third lens).
  18. In any one of paragraphs 14 through 17, An optical system configured to perform a focus adjustment operation by moving at least some of the plurality of lenses in the direction of the optical axis.
  19. In any one of paragraphs 14 through 18, An optical system configured to perform optical image stabilization (OIS) by moving at least some of the plurality of lenses in at least one direction perpendicular to the optical axis.
  20. In any one of paragraphs 14 through 19, An optical system configured to perform optical image stabilization (OIS) by moving or rotating the above-mentioned optical member.

Description

Optical system and electronic device including the same The examples disclosed in this document relate to optical systems and electronic devices including the same. Optical devices, such as cameras capable of capturing images or videos, have been widely used. While film-based optical devices were dominant in the past, recently, digital cameras and video cameras equipped with solid-state image sensors, such as CCD (charge coupled device) or CMOS (complementary metal-oxide semiconductor), have become widely popular. Optical devices employing solid-state image sensors (CCD or CMOS) are gradually replacing film-based optical devices because they make it easier to store, duplicate, and transfer images compared to film-based optical devices. To acquire high-quality images and/or videos, an optical device may include an optical system (or optical system) composed of multiple lenses and an image sensor having a high pixel count. The optical system can acquire high-quality (high-resolution) images and/or videos by, for example, having a low F-number (Fno) and low aberration. To obtain a low F-number and low aberration—in other words, to obtain bright and high-resolution images—it is necessary to combine multiple lenses. The pixel count of an image sensor increases as it contains more pixels, and an image sensor with a higher pixel count can acquire high-resolution (high-resolution) images and/or videos. To implement a high-pixel image sensor within the limited mounting space of an electronic device, multiple very small pixels, for example, micrometer-sized pixels, may be arranged. Recently, image sensors containing tens of millions to hundreds of millions of micrometer-sized pixels are being installed in portable electronic devices such as smartphones and tablets. Such high-performance optical devices can have the effect of inducing users to purchase electronic devices. The information described above may be provided as related art for the purpose of aiding understanding of the present disclosure. No claim or determination is made as to whether any of the foregoing may be applied as prior art related to the present disclosure. FIG. 1 is a block diagram of an electronic device in a network environment according to one embodiment of the present disclosure. FIG. 2 is a block diagram illustrating a camera module according to one embodiment of the present disclosure. FIG. 3 is a front perspective view of an electronic device according to one embodiment of the present disclosure. FIG. 4 is a rear perspective view of an electronic device according to one embodiment of the present disclosure. FIG. 5 is a schematic perspective view of an optical system according to one embodiment of the present disclosure. FIG. 6 is a configuration diagram showing an optical system according to one embodiment of the present disclosure. FIG. 7 is a configuration diagram showing an optical system according to one embodiment of the present disclosure. FIG. 8a is a schematic diagram showing an optical system according to one embodiment of the present disclosure. FIG. 8b is a graph showing the spherical aberration of the optical system of FIG. 8a according to one embodiment disclosed in this document. FIG. 8c is a graph showing the astigmatism of the optical system of FIG. 8a according to one embodiment disclosed in this document. FIG. 8d is a graph showing the distortion rate of the optical system of FIG. 8a according to one embodiment disclosed in this document. FIG. 9a is a configuration diagram showing an optical system according to one embodiment of the present disclosure. FIG. 9b is a graph showing the spherical aberration of the optical system of FIG. 9a according to one embodiment disclosed in this document. FIG. 9c is a graph showing the astigmatism of the optical system of FIG. 9a according to one embodiment disclosed in this document. FIG. 9d is a graph showing the distortion rate of the optical system of FIG. 9a according to one embodiment disclosed in this document. FIG. 10a is a schematic diagram showing an optical system according to one embodiment of the present disclosure. FIG. 10b is a graph showing the spherical aberration of the optical system of FIG. 10a according to one embodiment disclosed in this document. FIG. 10c is a graph showing the astigmatism of the optical system of FIG. 10a according to one embodiment disclosed in this document. FIG. 10d is a graph showing the distortion rate of the optical system of FIG. 10a according to one embodiment disclosed in this document. FIG. 11a is a schematic diagram showing an optical system according to one embodiment of the present disclosure. FIG. 11b is a graph showing the spherical aberration of the optical system of FIG. 11a according to one embodiment disclosed in this document. FIG. 11c is a graph showing the astigmatism of the optical system of FIG. 11a according to one embodiment disclosed in this document. FIG. 11d is a graph showing the distortion rate of the optical syste