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CN-115421269-B - Split lens and camera module

CN115421269BCN 115421269 BCN115421269 BCN 115421269BCN-115421269-B

Abstract

The application discloses a split lens and a camera module. The split lens comprises a first lens component and a second lens component which are sequentially arranged along an optical axis, the first lens component comprises a first lens group and a second lens group, the first lens group comprises a first optical zone for imaging and a first structural zone surrounding the first optical zone, the second lens group comprises a second optical zone for imaging and a second structural zone surrounding the second optical zone, the first structural zone and the second structural zone are mutually matched, the second lens component comprises a second lens barrel and a second lens group accommodated in the second lens barrel, and the first lens component is arranged on the second lens barrel. The first lens and the second lens in the first lens group are positioned in a buckling mode, so that the eccentricity between the first lens and the second lens is reduced, the imaging quality of the split lens is improved, and the first lens and the second lens are connected in the buckling mode, so that the distance between the first lens and the second lens is reduced, and the overall height of the lens is reduced.

Inventors

  • LIU FUCHUN
  • DU JIAWEI
  • RONG QI
  • LIU CHUNMEI

Assignees

  • 宁波舜宇光电信息有限公司

Dates

Publication Date
20260512
Application Date
20210531

Claims (15)

  1. 1. The split type lens is characterized by comprising a first lens component and a second lens component which are sequentially arranged along an optical axis, wherein the first lens component comprises a first lens group and a second lens group, the first lens group comprises a first lens and a second lens, the first lens group and the second lens group are glass lenses, the glass lenses are manufactured by cutting wafers, the wafers are combined and then cut to obtain the first lens group and the second lens group which are combined mutually, the first lens group comprises an optical area first for imaging and a structural area first surrounding the optical area first, the second lens group comprises an optical area second for imaging and a structural area second surrounding the optical area, the structural area first and the structural area second are combined mutually, an adhesive is arranged between the structural area second and the structural area first, the distance between the optical axes of the first lens and the second lens is smaller than 3 mu m, the second lens component comprises a second lens group and a second lens group which is accommodated in the second lens group, the second lens group is arranged between the first lens group and the second lens group, and the second lens group is provided with an adhesive through the adhesive, and the second lens group is arranged between the first lens group and the second lens group.
  2. 2. The split lens of claim 1, wherein at least one of the first lens and the second lens is a glass lens.
  3. 3. The split lens of claim 2, wherein the first lens and the second lens are glass lenses.
  4. 4. The split lens of claim 2, wherein the refractive indices of the first lens and the second lens are not equal.
  5. 5. The split lens of claim 2, wherein the refractive index of the first lens and/or the second lens is greater than 1.6, and the abbe number of the first lens and/or the second lens is greater than 56.
  6. 6. The split lens of claim 5, wherein the refractive index of the first lens and/or the second lens is greater than 1.8.
  7. 7. The split lens according to any one of claims 2-6, wherein the glass lens is manufactured by dicing a wafer, the wafer comprises a plurality of optical zones arranged in an array, the optical zones are spaced apart from each other, the area of the wafer other than the optical zones is a non-optical zone, and the wafer is adapted to dicing in the non-optical zone to separate the plurality of optical zones, thereby obtaining a plurality of the glass lenses.
  8. 8. The split lens of any one of claims 1-6, wherein an adhesive is disposed between the second structural region and the first structural region to bond the first lens to the second lens.
  9. 9. The split lens of any of claims 1-6, wherein the structural region of the first lens is blackened and the structural region of the second lens is blackened.
  10. 10. The split lens of any of claims 1-6, wherein the distance between the optical axes of the first lens and the second lens is less than 3 μm.
  11. 11. The split lens of any one of claims 1-6, wherein the roughness of the bonding surface is greater than the roughness of a surface of the optical zone and greater than the roughness of a non-bonding area of the structural zone, and the roughness of the bonding surface is 0.006 μm to 0.015 μm.
  12. 12. The split lens of claim 11, wherein the first lens part further comprises a first barrel surrounding the first lens group, the first barrel being bonded to the second barrel by an adhesive, the first lens group being connected or disconnected from the first barrel.
  13. 13. The split lens according to any one of claims 2 to 6, wherein the first lens part further comprises a first barrel for accommodating the first lens group, the first lens group is connected to the first barrel, the first barrel is bonded to the second barrel by an adhesive, and a ratio of a thermal expansion coefficient of the first barrel to a thermal expansion coefficient of the glass lens is 300% or less.
  14. 14. The split lens according to claim 13, wherein the material of the first barrel is metal, or the material of the first barrel is plastic with mineral fibers or glass fibers, or the material of the first barrel is polycarbonate with carbon fibers.
  15. 15. An imaging module, comprising the split lens according to any one of claims 1 to 14, a support, and a photosensitive assembly, wherein the split lens is held on an optical path of the photosensitive assembly by the support.

Description

Split lens and camera module Technical Field The present application relates to the field of lens technologies, and in particular, to a split lens and an imaging module. Background With the improvement of living standard, the requirements of consumers on the image pickup function of terminal equipment such as mobile phones, flat panels and the like are higher and higher, the requirements on the parameters such as astigmatism, field curvature, distortion and the like of a lens are lower, the requirements on the parameters such as a lens field angle, aperture, light transmittance and the like are also met, the lens parameters are improved, the lens imaging is improved, meanwhile, the lens height (refer to the total optical length TTL) is increased, and the thickness of the equipment is also an important parameter for terminals such as mobile phones and the like. How to control the height of the lens while improving the parameters of the lens and improving the imaging of the lens is an important subject developed by various manufacturers at present, wherein, the improvement of the refractive index of the lens and the adoption of the glass lens are one of the currently feasible schemes. At present, glass lenses are generally manufactured by a molding technology, mainly utilizing the characteristic that viscosity of glass is reduced along with temperature rise, placing a preformed glass preform into a precision processing and molding die, heating to a temperature between a glass transition temperature and a softening point under a proper environmental atmosphere, pressing the surface of a die core to deform the glass, converting the shape of the die core, cooling, removing pressure, separating the die, and taking out a finished product. However, the molding process has the defects that the surface type precision of the glass lenses is difficult to control, so that the lenses are eccentric, the mold is easy to wear, the mold is required to be maintained for many times, and the cost is high. Disclosure of Invention In order to solve the defects in the prior art, an object of the application is to provide a split lens and a camera module with the split lens, which are beneficial to improving imaging quality. Another object of the present application is to provide a split lens and an image capturing module having the split lens, which is beneficial to reducing the height of the lens. In order to achieve the above object, the present application provides a split lens, including a first lens component and a second lens component sequentially arranged along an optical axis, the first lens component includes a first lens group, the first lens group includes a first lens and a second lens, the first lens includes a first optical area for imaging and a first structural area surrounding the first optical area, the second lens includes a second optical area for imaging and a second structural area surrounding the second optical area, the first structural area and the second structural area are mutually engaged, the second lens component includes a second lens barrel and a second lens group accommodated in the second lens barrel, and the first lens component is disposed on the second lens barrel. Preferably, at least one of the first lens and the second lens is a glass lens. Preferably, the first lens and the second lens are glass lenses. Preferably, the glass lens is manufactured by cutting a wafer, the wafer comprises a plurality of optical areas arranged in an array, the optical areas are mutually spaced, the area of the wafer except for the optical areas is a non-optical area, and the wafer is suitable for cutting in the non-optical area so as to separate a plurality of the optical areas, so that a plurality of the glass lenses are obtained. Preferably, an adhesive is disposed between the second structural region and the first structural region to bond the first lens to the second lens. Preferably, the structural region of the first lens is subjected to a blackening treatment, and the structural region of the second lens is subjected to a blackening treatment. Preferably, the refractive indices of the first lens and the second lens are not equal. Preferably, the refractive index of the first lens and/or the second lens is greater than 1.6, and the abbe number of the first lens and/or the second lens is greater than 56. Preferably, the refractive index of the first lens and/or the second lens is greater than 1.8. Preferably, the distance between the optical axes of the first lens and the second lens is less than 3 μm. Preferably, the first lens is adhered to the second lens barrel, a side of the first structural area opposite to the second lens barrel is provided with an adhering surface, the roughness of the adhering surface is larger than that of the surface of the optical area and that of the non-adhering area of the first structural area, and the roughness of the adhering surface is 0.006-0.015 μm. As one preferable,