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CN-121995609-A - Optical zoom lens, camera module and electronic equipment

CN121995609ACN 121995609 ACN121995609 ACN 121995609ACN-121995609-A

Abstract

The application relates to the technical field of optical imaging, and particularly discloses an optical zoom lens, an imaging module and electronic equipment, which ensure the imaging quality of the optical zoom lens while ensuring the optical zoom lens to have a larger zoom range. The optical zoom lens comprises a first lens group and a second lens group, wherein the first lens group has positive refractive power, the first lens group can move along the optical path of the optical zoom lens, the second lens group has negative refractive power, the optical zoom lens has a first state and a second state, when the optical zoom lens is in the first state, the first lens group is located at a first position, the second lens group is located outside the optical path of the optical zoom lens, and when the optical zoom lens is in the second state, the first lens group is located at a second position, and the second lens group is located in the optical path of the optical zoom lens.

Inventors

  • Request for anonymity
  • XU YUXUAN

Assignees

  • 南昌欧菲光电技术有限公司

Dates

Publication Date
20260508
Application Date
20260213

Claims (14)

  1. 1. An optical zoom lens, comprising: A first lens group having positive refractive power, the first lens group being movable along an optical path of the optical zoom lens; a second lens group with negative refractive power; The optical zoom lens is provided with a first state and a second state, when the optical zoom lens is in the first state, the first lens group is positioned at a first position, and the second lens group is positioned outside the optical path of the optical zoom lens; The optical zoom lens satisfies the following relation: rg1-1/Rg1-n is more than or equal to 0.8 and less than or equal to 1.8, or, -0.6≤Rg1-n/Rg2-1≤-0.1; Wherein Rg1-1 is the radius of curvature of the light incident surface of the first lens group at the optical axis, rg1-n is the radius of curvature of the light emergent surface of the first lens group at the optical axis, and Rg2-1 is the radius of curvature of the light incident surface of the second lens group at the optical axis.
  2. 2. The optical zoom lens according to claim 1, wherein the optical zoom lens satisfies the following relation: 20 mm≤f-s≤26 mm, and/or, 37Mm < f-1 < 40mm, and/or, 1.5≤f-1/f-s≤2.0; Wherein f-s is the effective focal length of the optical zoom lens in the first state, and f-1 is the effective focal length of the optical zoom lens in the second state.
  3. 3. The optical zoom lens according to claim 1, wherein the optical zoom lens satisfies the following relation: 12 DEG≤FOV-s)/2≤18 DEG, and/or, 8 DEG≤FOV-1)/2≤9.5 DEG, and/or, 0.5≤FOV-1/FOV-s≤0.7; Wherein FOV-s is the maximum angle of view of the optical zoom lens in the first state, and FOV-1 is the maximum angle of view of the optical zoom lens in the second state.
  4. 4. The optical zoom lens according to claim 1, wherein the optical zoom lens satisfies the following relation: FNO-s is 2.5 or less and 4.1 or less, and/or, 4.0.Ltoreq.FNO-1≤5.7, and/or, 1.35≤FNO-1/FNO-s≤1.65; Wherein FNO-s is the f-number of the optical zoom lens in the first state, FNO-1 is the f-number of the optical zoom lens in the second state.
  5. 5. The optical zoom lens of claim 1, wherein the first group of lenses is a variable focal length group, the optical zoom lens satisfying the following relationship: 0.98≤fg1-1/fg1-s≤1.15; Wherein fg1-s is the effective focal length of the first lens group in the first state, and fg1-1 is the effective focal length of the first lens group in the second state.
  6. 6. The optical zoom lens of claim 1, further comprising a first steering element disposed on an object side of the first lens group and within an optical path of the optical zoom lens.
  7. 7. The optical zoom lens of claim 6, wherein the first turning element has negative refractive power, and the first turning element turns light rays by 90 °.
  8. 8. The optical zoom lens according to claim 6, wherein the optical zoom lens satisfies the following relation: 7 mm≤ATP 1s-ATP1 l≤9.5 mm, and/or, 45mm≤TTL≤52mm; The ATP1s is a distance between the light incident surface of the first lens group and the image side surface of the first steering element on the optical axis when the first lens group is in the first state, the ATP1l is a distance between the light incident surface of the first lens group and the image side surface of the first steering element on the optical axis when the first lens group is in the second state, and the TTL is a distance between the object side surface of the first steering element and the image side surface of the optical zoom lens on the optical axis.
  9. 9. The optical zoom lens of claim 1, wherein the first lens group has four lens elements with refractive power, and comprises, in order from an object side to an image side along an optical axis, a first lens element with negative refractive power, a second lens element with positive refractive power, an object side surface of the first lens element being convex at a paraxial region, an image side surface of the first lens element being convex at a paraxial region, an object side surface of the fourth lens element being convex at a paraxial region, and an image side surface of the fourth lens element being concave at a paraxial region; The second lens group comprises four lenses with refractive power, and sequentially comprises a fifth lens, a sixth lens, a seventh lens and an eighth lens from an object side to an image side along an optical axis, wherein the object side of the fifth lens is a concave surface at a paraxial region.
  10. 10. The optical zoom lens according to claim 9, wherein the optical zoom lens satisfies the following relation: 0.2≤f1/f≤0.5, and/or, 0.2 < F2/f <10> and/or, 0.35 < F3/f < 3.5, and/or, 0.5 < F4/f < 13.5, and/or, 0.4 < F5/f < 21 > and/or, 0.15 < F6/f < 3.0, and/or, 0.2 < F7/f < 3.0, and/or, 0.45≤|f8/f|≤35; Wherein f is an effective focal length of the optical zoom lens, f1 is an effective focal length of the first lens, f2 is an effective focal length of the second lens, f3 is an effective focal length of the third lens, f4 is an effective focal length of the fourth lens, f5 is an effective focal length of the fifth lens, f6 is an effective focal length of the sixth lens, f7 is an effective focal length of the seventh lens, and f8 is an effective focal length of the eighth lens.
  11. 11. The optical zoom lens according to claim 9, wherein the optical zoom lens satisfies the following relation: r1/f is 0.15 or less and 0.36 or less, and/or, -1.Ltoreq.R2/f≤0.25, and/or, R7/f is 0.1 or less and 0.65 or less, and/or, R8/f is 0.1 or less and 0.35 or less, and/or, -1≤R9/f≤-0.3; Wherein f is an effective focal length of the optical zoom lens, R1 is a radius of curvature of an object side surface of the first lens element at an optical axis, R2 is a radius of curvature of an image side surface of the second lens element at the optical axis, R7 is a radius of curvature of an object side surface of the fourth lens element at the optical axis, R8 is a radius of curvature of an image side surface of the fourth lens element at the optical axis, and R9 is a radius of curvature of an object side surface of the fifth lens element at the optical axis.
  12. 12. The optical zoom lens of claim 1, further comprising a second steering element positioned on an image side of the first lens group and within an optical path of the optical zoom lens when the optical zoom lens is in a first state, and positioned on an image side of the second lens group and within an optical path of the optical zoom lens when the optical zoom lens is in a second state.
  13. 13. A camera module, comprising: The optical zoom lens according to any one of claims 1 to 12, and And the image sensor is arranged on the image side of the optical zoom lens.
  14. 14. An electronic device, comprising: Housing body The camera module of claim 13, the camera module mounted to the housing.

Description

Optical zoom lens, camera module and electronic equipment Technical Field The application relates to the technical field of optical imaging, in particular to an optical zoom lens, an imaging module and electronic equipment. Background A continuous zoom lens is a lens in which a continuous change in focal length is achieved by changing the spacing between its inner lens groups. In the current continuous zoom lens architecture, a high-sharing lens group is required between different focal segments, which results in a small focal length variation range of the continuous zoom lens and also results in reduced imaging performance after focal length variation of the continuous zoom lens. Disclosure of Invention In view of the foregoing, it is necessary to provide an optical zoom lens, an image capturing module, and an electronic apparatus, which can ensure the imaging quality of the optical zoom lens while having a large zoom range. In a first aspect, an embodiment of the present application provides an optical zoom lens, including a first lens group having positive refractive power, the first lens group being movable along an optical path of the optical zoom lens, a second lens group having negative refractive power, the optical zoom lens having a first state and a second state, when the optical zoom lens is in the first state, the first lens group being located at a first position, the second lens group being located outside the optical path of the optical zoom lens, when the optical zoom lens is in the second state, the first lens group being located at a second position, the second lens group being located within the optical path of the optical zoom lens, the optical zoom lens satisfying a relationship of 0.8-1/Rg 1-n-1.8, or-0.6-Rg 1-n/Rg 2-1-0.1, wherein Rg1-1 is a radius of curvature of an optical input surface of the first lens group, rg1-n is a radius of curvature of an optical input surface of the first lens group, and Rg1-n is a radius of curvature of an optical input surface of the second lens. The optical zoom lens has the advantages that when the optical zoom lens is in the first state, the first lens group is located at the first position, the second lens group is located outside the optical path of the optical zoom lens, the optical zoom lens images through the first lens group with positive refractive power, the first lens group with positive refractive power has the function of light convergence, the optical zoom lens is facilitated to obtain higher contrast and lower astigmatism under the focal length, excellent center and edge image quality is provided under the focal length, the imaging quality of the optical zoom lens is ensured, when the optical zoom lens is in the second state, the first lens group is located at the second position, the second lens group is located in the optical path of the optical zoom lens, the optical zoom lens forms an image through the first lens group with positive refractive power and the second lens group with negative refractive power, the first lens group with positive refractive power is enabled to initially converge light, the second lens group with negative refractive power is enabled to form an intermediate image, and the intermediate image of the second lens with negative refractive power is prolonged, and therefore the imaging effect of the optical zoom lens is enabled to realize long-focus. By arranging the second lens group with negative refractive power, the aberration (such as chromatic aberration and field curvature) of the optical zoom lens can be balanced, and a part of positive aberration generated by the first lens group can be corrected, so that the optical zoom lens can maintain good imaging quality under the long focal length or the ultra-long focal length. The optical zoom lens of the embodiment realizes large-range zooming by moving the first lens group and combining the moving-in and moving-out of the second lens group, and can obtain stable and high-quality imaging quality in the whole focal section range by reasonable configuration and aberration compensation of the positive refractive power of the first lens group and the negative refractive power of the second lens group, thereby ensuring the imaging quality of the optical zoom lens. Further, the ratio of the curvature radius of the light incident surface of the first lens group to the curvature radius of the light emergent surface of the first lens group is reasonably configured within a certain range by enabling the optical zoom lens to meet Rg1-1/Rg1-n which is smaller than or equal to 0.8, so that the light deflection can be promoted to be gentle, the symmetry of the optical zoom lens is maintained, and the error resistance and the imaging quality of the optical zoom lens are improved. Further, the optical zoom lens satisfies Rg1-n/Rg 2-1-0.1, and the ratio of the curvature radius of the light emergent surface of the first lens group to the curvature radius of the light incident surfa