Miniaturized periscope lens module

Abstract

The utility model relates to the field of mobile phone camera modules, and discloses a miniaturized periscope lens module, which comprises a prism, a focusing part, a lens and a sensor part, the prism is U-shaped, the sensor part and the focusing part are respectively arranged at two ends of the prism and are positioned on the same side of the prism, the lens is arranged on the focusing part, the prism is provided with four reflecting surfaces, and the reflecting surfaces are arranged on the prism. Light enters from the lens and then enters the sensor part through four times of reflection. The periscope lens module is small in thickness and can be applied to a mobile phone.

Description

Technical Field

[0001] The utility model relates to the field of mobile phone camera modules, and particularly relates to a miniaturized periscope lens module. Background Art

[0002] With the increasingly compact structure of mobile phones, and with the development of photography technology in recent years, the volume of camera modules in electronic devices is gradually increasing and the performance is gradually improving. Among them, autofocus devices are widely used in mobile phone camera modules to make the camera shoot farther. At present, most mobile phones use a combination of multiple cameras. The telephoto lens among them can take clearer and higher-quality pictures, which is deeply favored by users. However, the displacement required in the focusing process of the telephoto lens is more, and the optical path distance between the sensor of the telephoto lens and the lens needs to be longer, which often results in a larger length of the telephoto lens and cannot adapt to the thin and light body of the mobile phone. Therefore, a periscope lens module with a small thickness that can be applied to mobile phones is required. Summary of the Utility Model

[0003] The utility model aims to provide a miniaturized periscope lens module to provide a periscope lens module with a small thickness that can be applied to mobile phones.

[0004] To achieve the above object, the utility model adopts the following technical scheme: A miniaturized periscope lens module includes a prism, a focusing part, a lens and a sensor part. The prism is U-shaped. The sensor part and the focusing part are respectively installed at both ends of the prism and on the same side of the prism. The lens is installed on the focusing part. Four reflecting surfaces are provided on the prism, and light enters the sensor part after being reflected four times after entering from the lens.

[0005] The beneficial effects of this scheme are as follows:

[0006] The prism is designed to be U-shaped, and four reflecting surfaces are provided on the upper part of the prism. Light is reflected multiple times in the prism, so that the long optical path is compactly folded in a limited space, greatly reducing the thickness of the module, enabling it to adapt to the thin and light trend of modern smart phones and other devices. At the same time, even if a larger sensor module is replaced, the thickness of the lens module will not increase significantly, which helps to improve the clarity and resolution of the telephoto image quality.

[0007] Four reflecting surfaces are provided on the prism. After light enters the lens, it is reflected in turn through the four reflecting surfaces of the U-shaped prism, thereby extending the optical path distance between the sensor and the lens. The extended optical path can achieve a higher multiple of optical zoom, which helps to capture the details of distant objects and provide a better telephoto imaging effect within the limited thickness of the module.

[0008] Preferably, as an improvement, the sensor unit includes an image sensor, a support base, and a rigid circuit board. The image sensor is fixed to the rigid circuit board with glue and electrically connected thereto, and the rigid circuit board is fixed to the support base.

[0009] The beneficial effects are as follows: The electrical connection between the image sensor and the rigid circuit board ensures the reliability and stability of signal transmission, ensuring the imaging quality. The support base provides a solid foundation for the rigid circuit board and the image sensor, ensuring the structural stability of the module. In the case of device movement or vibration, the image sensor can still maintain a stable working state, ensuring that the imaging quality is not affected.

[0010] Preferably, as an improvement, first cut surfaces are provided on the bottom surfaces of both ends of the prism, and second cut surfaces are provided at both bent portions of the prism. The first cut surfaces are respectively opposite to a second cut surface, and mirror high-reflection coatings are applied on both the first cut surfaces and the second cut surfaces.

[0011] The beneficial effects are as follows: Coating the high-reflection coating enables more light to be smoothly reflected by the cut surface, improving the light reflectivity so that the light can still enter the image sensor for imaging after multiple reflections, ensuring the clarity and accuracy of the final image.

[0012] Preferably, as an improvement, an infrared reflection coating is applied on the surface of the prism opposite to the sensor unit.

[0013] The beneficial effects are as follows: Infrared light usually interferes with the image sensor, resulting in color distortion or blurring of the image. By applying an infrared reflection coating on the surface of the prism, the infrared light before entering the sensor unit can be effectively filtered out, reducing infrared light interference, thereby improving the color restoration and clarity of the image. Coating the infrared reflection coating directly on the surface of the prism instead of setting a separate filter on the sensor unit simplifies the structure of the camera module, reduces the number and complexity of components, and further reduces the thickness of the lens module.

[0014] Preferably, as an improvement, the support base is fixedly connected to the prism. An installation groove for accommodating the image sensor is provided on the support base, and a light inlet hole for light entry is also provided. A support beam is further provided in the installation groove.

[0015] The beneficial effects are as follows: The support beam provides additional support and limitation for the sensor, preventing it from falling off during vibration. At the same time, the support beam helps to improve the structural strength of the support base.

[0016] Preferably, as an improvement, an air escape hole is further provided at the bottom of the support base.

[0017] The beneficial effects are as follows: After the lens module is assembled, high-temperature drying and curing of the glue are required. Due to temperature changes or gases that may be generated during the component installation process, they may accumulate inside. The escape holes can effectively release these gases, prevent the air pressure from rising inside the module, and thus avoid component deformation or displacement caused by air pressure changes. Description of the Drawings

[0018] Figure 1 It is an exploded structural schematic diagram of an embodiment of the present invention;

[0019] Figure 2 It is a top view of the support base of an embodiment of the present invention;

[0020] Figure 3 It is a structural schematic diagram of the prism of an embodiment of the present invention. Detailed Embodiment

[0021] The following is further detailed through specific embodiments:

[0022] The reference numerals in the accompanying drawings of the specification include: prism 1, focusing part 2, lens 3, image sensor 4, support base 5, rigid circuit board 6, first section plane 7, second section plane 8, infrared reflection coating 9, light inlet hole 10, escape hole 11, support beam 12.

[0023] Embodiment

[0024] The embodiment is basically as Figures 1 - 3 shown, such as Figure 1 shown, a miniaturized periscope lens module, including a prism 1, a focusing part 2, a lens 3 and a sensor part. The prism 1 is U-shaped. The sensor part and the focusing part 2 are respectively installed at both ends of the prism 1 and on the same side of the prism 1. The lens 3 is installed on the focusing part 2. The prism 1 is provided with four reflecting surfaces, such as Figure 3In the present embodiment, first cut surfaces 7 are provided on the bottom surfaces of both ends of the prism 1, and second cut surfaces 8 are provided at both bent portions of the prism 1. The first cut surfaces 7 are respectively opposite to a second cut surface 8. Mirror high-reflection coatings are applied on both the first cut surfaces 7 and the second cut surfaces 8. Coating the high-reflection coatings enables more light to be smoothly reflected by the cut surfaces, improving the reflectivity of the light so that the light can still enter the image sensor 4 for imaging after multiple reflections, ensuring the clarity and accuracy of the final image. The two first cut surfaces 7 are respectively opposite to the sensor part and the focusing part. The light enters from the lens 3 and enters the sensor part after four reflections. The sensor part includes an image sensor 4, a support base 5, and a rigid circuit board 6. The image sensor 4 is fixed to the rigid circuit board 6 with glue and is electrically connected thereto. The rigid circuit board 6 is fixedly connected to the support base 5. The image sensor 4 is electrically connected to the rigid circuit board 6, ensuring the reliability and stability of signal transmission and ensuring the imaging quality. The support base 5 supports the rigid circuit board 6 and the image sensor 4, ensuring the structural stability of the module. When the device moves or vibrates, the image sensor 4 can still maintain a stable working state, ensuring that the imaging quality is not affected.

[0025] In this embodiment, as Figure 1 shown, an infrared reflection coating 9 is applied on the surface of the prism 1 opposite to the sensor part. The conventional band is antireflection-coated, and infrared light can cause color distortion or blurring of the image. By applying the infrared reflection coating 9 on the surface of the prism 1, the infrared light before entering the sensor part can be effectively filtered out, reducing the infrared light interference, thereby improving the color reproducibility and clarity of the image. The reason for directly applying the infrared reflection coating 9 on the surface of the prism 1 instead of separately setting a filter on the sensor part is that it can further simplify the camera module and further reduce the thickness of the lens 3 module.

[0026] The support base 5 is fixedly connected to the prism 1. As Figure 2 shown, an installation groove for accommodating the image sensor 4 is formed on the support base 5, and a light inlet hole 10 for light to enter is also formed. Support beams 12 are further provided in the installation groove. The number of the support beams 12 is two, which support both ends of the image sensor 4. The support beams 12 provide support and limit for the sensor, ensuring its stability during vibration. At the same time, the support beams 12 help to improve the structural strength of the support base 5. An air escape hole 11 is also formed at the bottom of the support base 5. After the lens 3 module is assembled, high-temperature drying of the glue is required for curing. Since the temperature change may cause an increase in air pressure, the air escape hole 11 can effectively release these gases, preventing the air pressure from rising inside the module, thereby avoiding component deformation or displacement caused by air pressure changes. After curing, the air escape hole 11 is blocked with glue.

[0027] The specific implementation process is as follows:

[0028] The prism 1 is designed in a U shape, and four reflecting surfaces are arranged on the upper part of the prism 1. The light is reflected multiple times inside the prism 1, so that the long optical path is compactly folded in a limited space, greatly reducing the thickness of the module, enabling it to adapt to the thin and light trend of modern devices such as smart phones. At the same time, even if a larger sensor module is replaced, the thickness of the lens 3 module will not increase significantly, which helps to improve the clarity and resolution of the telephoto image quality.

[0029] Four reflecting surfaces are provided on the prism 1. After the light enters the lens 3, it is reflected successively through the four reflecting surfaces of the U-shaped prism 1, thereby extending the optical path distance between the sensor and the lens 3. The extended optical path can achieve a higher multiple of optical zoom, which helps to capture the details of distant objects and provides a better telephoto imaging effect within the limited module thickness.

[0030] The above are only the embodiments of the present invention, and common general knowledge such as specific technical solutions and / or characteristics known in the solutions is not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. A miniaturized periscope lens module, characterized in that: It includes a prism, a focusing part, a lens and a sensor part. The prism is U-shaped. The sensor part and the focusing part are respectively installed at both ends of the prism and on the same side of the prism. The lens is installed on the focusing part. There are four reflecting surfaces on the prism. After the light enters from the lens, it undergoes four reflections and then enters the sensor part.

2. The miniaturized periscope lens module according to claim 1, wherein: The sensor part includes an image sensor, a support base and a rigid circuit board. The image sensor is fixed on the rigid circuit board with glue and electrically connected to it. The rigid circuit board is fixed on the support base.

3. The miniaturized periscope lens module according to claim 2, wherein: First cut surfaces are provided on the bottom surfaces of both ends of the prism, and second cut surfaces are provided at both bent portions of the prism. The first cut surfaces are respectively opposite to one second cut surface. Mirror high-reflection coatings are made on both the first cut surface and the second cut surface.

4. The miniaturized periscope lens module according to claim 3, wherein: An infrared reflection coating is made on the surface of the prism opposite to the sensor part.

5. The miniaturized periscope lens module according to claim 4, characterized in that: The support base is fixedly connected to the prism. An installation groove for accommodating the image sensor is provided on the support base, and a light inlet hole for light to enter is also provided. A support beam is also provided in the installation groove.

6. The miniaturized periscope lens module according to claim 5, characterized in that: An air escape hole is also provided at the bottom of the support base.

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