Search

CN-224216934-U - Periscope type long-focus camera shooting module

CN224216934UCN 224216934 UCN224216934 UCN 224216934UCN-224216934-U

Abstract

The utility model relates to the field of optical imaging and discloses a periscope type long-focus camera module which comprises a bracket, a prism assembly, a lens assembly and an image processing assembly, wherein the prism assembly is arranged on the bracket and provided with a first incident surface and a first emergent surface, the lens assembly is arranged on the bracket and faces the first incident surface, the prism assembly comprises a first prism arranged on the bracket and a second prism arranged on the first prism, and a composite film system structure is arranged between the first prism and the second prism. The focal length is effectively prolonged under the condition that the height of the prism assembly is not increased through compounding of the first prism and the second prism, the whole structure is more compact and lighter and thinner, and the gradient refractive index is deposited while the connection of the first prism and the second prism is ensured, so that the optimization of the optical performance is realized, the overall performance of an optical system is effectively improved, the light inlet quantity and the image quality detail are enhanced, and the requirement of a consumer on high-quality imaging is met.

Inventors

  • GU XIN
  • WEI KEFEI
  • WU YAOZHENG
  • Peng Ruyi

Assignees

  • 盛泰光电科技股份有限公司

Dates

Publication Date
20260508
Application Date
20250618

Claims (10)

  1. 1. The periscope type long-focus camera shooting module comprises a support, a prism assembly, a lens assembly and an image processing assembly, wherein the prism assembly is arranged on the support and provided with a first incident surface and a first emergent surface, the lens assembly is arranged on the support and faces the first incident surface, and the image processing assembly is characterized in that the prism assembly comprises a first prism and a second prism, the first prism is arranged on the support and provided with the first incident surface, the second prism is arranged on the first prism and provided with the first emergent surface, and a composite film system structure enabling the first prism and the second prism to be connected in a laminated mode and prolonging focal length is arranged between the first prism and the second prism.
  2. 2. The periscope type tele camera module of claim 1, wherein the composite film system structure comprises a high refractive index layer with a refractive index of nd 1 , a medium refractive index layer with a refractive index of nd 2 and a low refractive index layer with a refractive index of nd 3 in sequence, nd 1 ＞nd 2 ＞nd 3 , the high refractive index layer is attached to the second emergent surface, and the low refractive index layer is attached to the second incident surface.
  3. 3. The periscope type tele camera module of claim 2, wherein the thicknesses of the high refractive index layer, the medium refractive index layer and the low refractive index layer are t 1 、t 2 and t 3 ,t 1 +t 2 +t 3 =λ/4 in sequence, wherein λ is the wavelength of incident light.
  4. 4. The periscope type tele camera module as claimed in any one of claims 1 to 3, wherein the first prism is further provided with a first reflecting surface and a second emitting surface, light rays enter the first prism from the first incident surface and sequentially emit towards the first reflecting surface and the second emitting surface, the second prism is further provided with a second incident surface and a second reflecting surface, the composite film system structure is formed between the second emitting surface and the second incident surface, and light rays emit towards the composite film system structure, the second reflecting surface and the first emitting surface sequentially after emitting towards the second emitting surface and then towards the image processing assembly.
  5. 5. The periscope type tele camera module of claim 4, wherein the first prism is configured as a triangular prism, the first incident surface, the first reflecting surface and the first emergent surface are sequentially distributed, the second prism is configured as a trapezoidal prism, the second incident surface and the first emergent surface are positioned on the same side, the second prism further comprises a third reflecting surface and a fourth reflecting surface, the third reflecting surface and the fourth reflecting surface are symmetrically distributed on the same side as the second incident surface, and light sequentially passes through the first incident surface, the first reflecting surface, the second emergent surface, the composite film system structure, the second incident surface, the second reflecting surface, the third reflecting surface and the fourth reflecting surface and then irradiates the first emergent surface, and the first incident surface is coaxially arranged with the lens.
  6. 6. The periscope type tele camera module of claim 5, wherein an included angle between the first incident surface and the first reflecting surface is 30 degrees, and an included angle between the second incident surface and the second reflecting surface is 45 degrees.
  7. 7. The periscope type tele camera module of claim 5, wherein the third reflecting surface and the first emergent surface are jointly configured as a mounting surface, and the image processing component is mounted on the mounting surface and abutted against the first prism.
  8. 8. The periscope type tele camera module of claim 7, wherein the lens assembly is mounted on the mounting surface, and the image processing assembly is mounted on a side of the lens assembly facing away from the mounting surface.
  9. 9. The periscope type tele camera module of claim 8, wherein the lens assembly comprises a protective glass sheet, a light-emitting lens and an anti-fog coating coated on the protective glass sheet, the anti-fog coating is close to the first emergent surface, and the light-emitting lens is positioned on one side far away from the first emergent surface.
  10. 10. The periscope type tele camera module of claim 1, wherein the bracket is provided with a matching surface, a first mounting groove matched with a second prism is concavely arranged on the matching surface, the second prism is mounted in the first mounting groove, an extension part is formed on one side of the matching surface corresponding to the second incidence surface in an extending mode, a second mounting groove matched with the first prism and communicated with the first mounting groove is concavely arranged on the extension part along the optical axis direction, the first prism is mounted in the second mounting groove, the second mounting groove penetrates through one side of the extension part, which faces away from the first mounting groove, along the optical axis direction to form a light inlet, and the lens assembly is mounted on one side of the bracket, which is provided with the light inlet, and is opposite to the light inlet with the first incidence surface.

Description

Periscope type long-focus camera shooting module Technical Field The utility model relates to the field of optical imaging, in particular to a periscope type long-focus camera module. Background Along with the popularization of intelligent electronic devices, the dependence on mobile phones in daily life of people is continuously improved, and particularly, the demands on communication and camera functions are increasing. In order to meet the requirements of consumers on photographing performance of mobile phones, the application requirements of the tele lens on the mobile phones are increasing. Conventional optical zoom technology achieves zooming by moving the lens assembly, however, this approach has many limitations when applied to cell phones. Because the inner space of the mobile phone is limited, the mobile phone is difficult to adapt to the traditional large-size lens assembly, so that the shooting effect is poor, and the requirement of consumers on high magnification cannot be met. To overcome these limitations, periscope lenses have been developed. By introducing the prism into the lens imaging system, the periscope type lens can prolong the focal length without increasing the thickness of the mobile phone and support a sensor with a larger bottom, thereby enhancing the light incoming quantity and the image quality details. However, the existing periscope lens still has some problems. Under the premise of ensuring performance indexes, the height and the width of the existing periscope type lens module are not fully optimized, the compactness of the overall design is affected, the traditional glass total reflection prism is easy to damage, extra protection measures are needed, and the manufacturing cost and the use risk are increased. Disclosure of utility model Aiming at the defects of the prior art, the utility model aims to provide the periscope type long-focus camera module to solve the problem that the imaging quality and the appearance effect are poor due to the fact that high-power optical zooming is difficult to realize on the premise of not increasing the thickness of a mobile phone. In order to solve the technical problems, the utility model provides a periscope type long-focus camera module which comprises a bracket, a prism assembly, a lens assembly and an image processing assembly, wherein the prism assembly is arranged on the bracket and provided with a first incident surface and a first emergent surface, the lens assembly is arranged on the bracket and faces the first incident surface, the image processing assembly is arranged on the bracket, the prism assembly comprises a first prism and a second prism, the first prism is arranged on the bracket and provided with the first incident surface, the second prism is arranged on the first prism and provided with the first emergent surface, and a composite film system structure which enables the first prism and the second prism to be connected in a lamination mode and prolongs the focal length is arranged between the first prism and the second prism. Further, the composite film structure sequentially comprises a high refractive index layer with a refractive index of nd 1, a medium refractive index layer with a refractive index of nd 2 and a low refractive index layer with a refractive index of nd 3, nd 1＞nd2＞nd3, wherein the high refractive index layer is attached to the second emergent surface, and the low refractive index layer is attached to the second incident surface. Further, the thicknesses of the high refractive index layer, the medium refractive index layer and the low refractive index layer are t 1、t2 and t 3,t1+t2+t3 =λ/4 in order, wherein λ is the wavelength of the incident light. The first prism is further provided with a first reflecting surface and a second emitting surface, light rays enter the first prism from the first incident surface and then sequentially irradiate the first reflecting surface and the second emitting surface, the second prism is further provided with a second incident surface and a second reflecting surface, the composite film system structure is formed between the second emitting surface and the second incident surface, and the light rays irradiate the composite film system structure, the second reflecting surface and the first emitting surface in sequence after irradiating the second emitting surface, and then irradiate the image processing assembly. The first prism is configured as a triangular prism, the first incident surface, the first reflecting surface and the first emergent surface are sequentially distributed, the second prism is configured as a trapezoidal prism, the second incident surface and the first emergent surface are positioned on the same side, the second prism further comprises a third reflecting surface and a fourth reflecting surface, the third reflecting surface is positioned on the same side as the second incident surface, the fourth reflecting surface is symmetrically distribute