Lens module and terminal device

Abstract

Embodiments of the present invention relate to the field of optical lenses and provide a lens module and terminal device. The lens module includes a plurality of lenses arranged sequentially from the object side to the image side, and each of the plurality of lenses has an image side facing the image side and an object side facing the object side, and includes at least one smooth surface between the object side and the image side. The angle between the tangent to a point other than the center of the surface within the effective diameter used for imaging on the smooth surface and the tangent to the center of the surface is 0° to 20°. At least one of the plurality of lenses is a specific wavelength absorbing glass lens, and at least one smooth surface is located on the specific wavelength absorbing glass lens. An ultraviolet-infrared cut film is provided, and the ultraviolet-infrared cut film is located on the smooth surface of the specific wavelength absorbing glass lens. Embodiments of the present invention can reduce the thickness of at least the lens module, improve the problem of angular drift, and reduce the ghosting phenomenon.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of optical lenses, and particularly to lens modules and terminal devices.

Background Art

[0002] Current terminal devices usually arrange a lens module to realize an imaging function, and the lens module in the terminal device usually forms an image for visible light. In order to avoid the influence of infrared light incident on the photosensitive element of the lens module on the normal imaging of the lens module by stray light and improve the imaging quality of the lens module, the lens module usually arranges a filter to cut off infrared light.

[0003] As people's requirements for the shooting quality of the lens module are getting higher and higher, the overall height of the lens module increases continuously as the number of lenses increases, and the presence of the filter makes the thickness of the lens module relatively large. The lens is prone to ghosting, which affects the imaging quality of the lens module, and it is also necessary to improve the angular drift problem of the lens transmittance.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The object of the present invention is to provide a lens module and a terminal device that can meet the requirements of infrared cut-off, small angular drift amount of lens transmittance, high imaging quality, and thin and light weight of the lens module without arranging a filter to cut off infrared light.

Means for Solving the Problems

[0005] To solve the aforementioned technical problems, one aspect of the present invention provides a lens module comprising: a plurality of lenses arranged sequentially from the object side to the image side, wherein any of the plurality of lenses has an image side facing the image side and an object side facing the object side; at least one gentle surface is included in the object side and the image side; the angle between the tangent to a point other than the center of the surface within the optically effective diameter used for imaging on the gentle surface and the tangent to the center of the gentle surface is 0° to 20°; at least one of the plurality of lenses is a specific wavelength absorbing glass lens, and at least one of the gentle surfaces is located on the specific wavelength absorbing glass lens; and an ultraviolet-infrared cut film is provided, the ultraviolet-infrared cut film is located on the gentle surface of the specific wavelength absorbing glass lens, and the ultraviolet-infrared cut film has the effect of absorbing light in the ultraviolet and infrared wavelength bands.

[0006] In some embodiments, the system further comprises an absorbing coating layer that absorbs light of a specific wavelength including at least one of the ultraviolet wavelength band, the infrared wavelength band, and the near-infrared wavelength band, wherein both the absorbing coating layer and the ultraviolet-infrared cut film are disposed on the smooth surface of the specific wavelength absorbing glass lens, and the absorbing coating layer is disposed between the cut film and the smooth surface.

[0007] In some embodiments, the system further comprises an absorbing coating layer that absorbs light of a specific wavelength, including at least one of the ultraviolet wavelength band, the infrared wavelength band, and the near-infrared wavelength band. The system further comprises a plastic lens, the other of which the smooth surface is located on the plastic lens, the ultraviolet-infrared cut film is located on the smooth surface of the specific wavelength absorbing glass lens, and the absorbing coating layer is located on the smooth surface of the plastic lens.

[0008] In some embodiments, the specific wavelength absorbing glass lens is a blue glass lens.

[0009] One aspect of the present invention further provides a lens module comprising: a plurality of lenses arranged sequentially from the object side to the image side, wherein each of the plurality of lenses has an image side facing the image side and an object side facing the object side, and includes at least one gentle surface within the object side and the image side. The angle between the tangent to a point other than the center of the surface within the optically effective diameter used for imaging on the gentle surface and the tangent to the center of the gentle surface is 0° to 20°. The plurality of lenses comprises at least one specific wavelength absorbing glass lens and at least one second glass lens. An ultraviolet-infrared cut film disposed on the gentle surface of the specific wavelength absorbing glass lens or on the gentle surface of the second glass lens, wherein the ultraviolet-infrared cut film absorbs light in the ultraviolet and infrared wavelength bands.

[0010] In some embodiments, the ultraviolet-infrared cut film further comprises an absorbing coating layer that absorbs light of a specific wavelength including at least one of the ultraviolet wavelength band, the infrared wavelength band, and the near-infrared wavelength band, wherein the ultraviolet-infrared cut film is disposed on the same smooth surface as the absorbing coating layer, and the absorbing coating layer is disposed between the ultraviolet-infrared cut film and the smooth surface.

[0011] In some embodiments, the system further comprises an absorbing coating layer that absorbs light of a specific wavelength including at least one of the ultraviolet wavelength band, the infrared wavelength band, and the near-infrared wavelength band, wherein one of the ultraviolet-infrared cut film and the absorbing coating layer is placed on the smooth surface of the specific wavelength absorbing glass lens, and the other is placed on the smooth surface of the second glass lens.

[0012] In some embodiments, the system further comprises an absorbing coating layer that absorbs light of a specific wavelength including at least one of the ultraviolet wavelength band, the infrared wavelength band, and the near-infrared wavelength band, and a plastic lens, wherein one of the absorbing coating layers is disposed on the smooth surface of the plastic lens.

[0013] In some embodiments, the specific wavelength absorbing glass lens is a blue glass lens. Another aspect of the present invention provides a terminal device including the lens module described in the above embodiments. [Effects of the Invention]

[0014] The beneficial effects of the present invention are as follows: The lens module includes an ultraviolet-infrared cut film, which can absorb light in the ultraviolet and infrared wavelength bands and can replace filters of related technologies. Since there is no need to use filters of related technologies, the thickness of the lens module can be reduced, making the lens module lighter and thinner. The lens module may include at least one specific wavelength absorbing glass lens among its multiple lenses, and the ultraviolet-infrared cut film is placed on the gentle surface of the specific wavelength absorbing glass lens. The gentle surface is relatively smooth, which can reduce spectral drift between the center and edge positions of the lens. At the same time, the specific wavelength absorbing glass lens can reduce the angular shift of the transmittance of the lens module with respect to the angle of incidence, thus improving the transmittance angular shift problem in related technologies. The lens module of the embodiment of the present invention also has a relatively high infrared cut absorption value and relatively high imaging quality. The lens module includes at least one specific wavelength absorbing glass lens and at least one second glass lens among its multiple lenses. The ultraviolet-infrared cut film can be placed on the gentle surface of a specific wavelength absorbing glass lens, or on the gentle surface of a second glass lens. The gentle surface is relatively smooth, which reduces spectral drift between the lens center and edge positions, and reduces the angular displacement of the lens module, thereby improving the angular displacement problem in related technologies. The lens module of the embodiment of the present invention also has a relatively high infrared cut absorption value and relatively high imaging quality. [Brief explanation of the drawing]

[0015] One or more embodiments are described illustratively with corresponding accompanying drawings, and these illustrative descriptions are not limiting to the embodiments, and unless otherwise specified, the accompanying drawings do not constitute a limitation. To more clearly illustrate embodiments of the present invention or technical solutions in the prior art, the following briefly introduces the drawings that may be used in the embodiments, and obviously, the drawings in the following description are merely some embodiments of the present invention, and those skilled in the art can obtain further drawings based on these drawings without any creative work. [Figure 1] This is a schematic diagram of the lens module structure in related technologies. [Figure 2] This is a schematic diagram of the structure of the lens module provided in Example 1 of the present invention. [Figure 3] This is a schematic diagram of the structure of the first lens in the lens module provided in Embodiment 1 of the present invention. [Figure 4] This is a schematic diagram of the partial structure shown in Figure 3. [Figure 5] This is a schematic diagram of the structure of the lens module provided in Example 2 of the present invention. [Figure 6] This is a schematic diagram of the structure of the lens module provided in Example 3 of the present invention. [Figure 7] This is a schematic diagram of the structure of the lens module provided in Embodiment 4 of the present invention. [Figure 8] This is a schematic diagram of the structure of the lens module provided in Example 5 of the present invention. [Figure 9] This is a schematic diagram of the structure of the lens module provided in Embodiment 6 of the present invention. [Figure 10] This is a schematic diagram of the structure of the lens module provided in Example 7 of the present invention. [Figure 11] This is a schematic diagram of the structure of the lens module provided in Comparative Example 2. [Figure 12] This is a diagram of the transmittance curves for the lens module of Comparative Example 1 at 0° and 30° light incidence. [Figure 13] This is a diagram of the transmittance curves for the lens module of Comparative Example 2 at 0° and 30° light incidence. [Figure 14] It is a transmittance curve diagram of the lens module in Example 1 for 0° incident light and 30° incident light. [Figure 15] It is a transmittance curve diagram of the lens module in Example 2 for 0° incident light and 30° incident light. [Figure 16] It is a schematic diagram of the internal transmittance curve when the blue glass lens in Comparative Example 1, Example 1, and Example 2 is irradiated with light. [Figure 17] It is a schematic diagram of the internal transmittance curve when the dyed plastic lens in Comparative Example 2 is irradiated with light. [Figure 18] It is a schematic diagram of the transmittance curve when the blue glass lens in Example 2 is irradiated with light. [Figure 19] It is a schematic diagram of the ghost simulation of the lens module in Comparative Example 1. [Figure 20] It is an enlarged schematic diagram of the A1 area in Figure 19. [Figure 21] It is an enlarged schematic diagram of the B1 area in Figure 19. [Figure 22] It is a schematic diagram of the ghost simulation of the lens module in Comparative Example 2. [Figure 23] It is a schematic diagram of the ghost simulation of the lens module in Example 1. [Figure 24] It is a schematic diagram of the ghost simulation of the lens module in Example 2. [Figure 25] It is a schematic diagram of the ghost simulation of the lens module in Comparative Example 1. [Figure 26] It is an enlarged schematic diagram of the A2 area in Figure 25. [Figure 27] It is an enlarged schematic diagram of the B2 area in Figure 25. [Figure 28] It is a schematic diagram of the ghost simulation of the lens module in Comparative Example 2. [Figure 29] It is a schematic diagram of the ghost simulation of the lens module in Example 1. [Figure 30] It is a schematic diagram of the ghost simulation of the lens module in Example 2. [Figure 31]This is a schematic diagram of the ghost simulation for the lens module in Comparative Example 1. [Figure 32] This is a schematic diagram of the ghost simulation for the lens module in Comparative Example 2. [Figure 33] This is a schematic diagram of the A3 region in Figure 32. [Figure 34] This is a schematic diagram of an enlarged view of area B3 in Figure 32. [Figure 35] This is a schematic diagram of the ghost simulation of the lens module in Example 1. [Figure 36] This is a schematic diagram of the ghost simulation of the lens module in Example 2. [Figure 37] This is a schematic diagram of the ghost simulation for the lens module in Comparative Example 1. [Figure 38] This is a schematic enlargement of area A4 in Figure 37. [Figure 39] This is a schematic diagram of the ghost simulation for the lens module in Comparative Example 2. [Figure 40] This is a schematic diagram of the ghost simulation of the lens module in Example 1. [Figure 41] This is a schematic diagram of the ghost simulation of the lens module in Example 2. [Modes for carrying out the invention]

[0016] Figure 1 is a schematic diagram of the structure of a lens module in the related technology. Referring to Figure 1, the lens module 100 in the related technology includes a plurality of lenses arranged sequentially from the object side to the image side. In Figure 1, an example is seven lenses including the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7. The lens module 100 also includes a filter GF (Glass Filter).

[0017] To improve the optical quality of the lens module, filter GF is used to absorb light in the infrared wavelength range. However, filter GF occupies a certain amount of space, making the thickness of the lens module 100 relatively large, and is prone to causing ghosting, which affects the image quality of the lens module 100. There is also room for improvement in the problem of angular drift of the lens module.

[0018] Embodiments of the present invention provide a lens module comprising a plurality of lenses arranged sequentially from the object side to the image side, wherein each of the plurality of lenses has an image side facing the image side and an object side facing the object side, and includes at least one smooth surface on the object side and the image side. The angle between the tangent to a point on the smooth surface other than the center of the surface and the tangent to the center of the smooth surface is 0° to 20°. At least one of the plurality of lenses is a specific wavelength absorbing glass lens, and at least one smooth surface is located on the specific wavelength absorbing glass lens. An ultraviolet-infrared cut film is provided, and the ultraviolet-infrared cut film is located on the smooth surface of the specific wavelength absorbing glass lens. The ultraviolet-infrared cut film can be placed on the smooth surface of the specific wavelength absorbing glass lens and can replace a filter of related technology, thereby reducing the thickness of the lens module of embodiments of the present invention. The ultraviolet-infrared cut film is located on the gentle surface of a specific wavelength-absorbing glass lens, and the angle between the tangent to a point other than the center of the surface within the optically effective diameter used for imaging on the gentle surface and the tangent to the center of the gentle surface is 0° to 20°. The small value of the angle between the tangent to The optically effective diameter used for imaging refers to the lens area through which light rays can pass and, after passing through the lens, reach the optical imaging sensor and participate in image formation. Correspondingly, there is also a structural area used to support and fix the lens. The structural area is located outside the optically effective diameter. The multiple lenses include at least one specific wavelength absorbing glass lens and at least one second glass lens.The ultraviolet-infrared cut film is placed on a smooth surface of a specific wavelength absorbing glass lens or a second glass lens, and the presence of the ultraviolet-infrared cut film can replace the filter of the lens module in related art, and therefore the thickness of the lens module in the embodiment of the present invention can be reduced. The ultraviolet-infrared cut film can be placed on a smooth surface of a specific wavelength absorbing glass lens or a second glass lens, and the smooth surface is relatively gentle, which can reduce spectral drift at the lens center and edge positions, improve the angular drift problem of the lens module, and the infrared cut absorption value of the lens module in the embodiment of the present invention can be increased, which can reduce ghosting and improve the image quality of the lens module.

[0019] To further clarify the object, technical solution, and advantages of the present invention, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will understand that many technical details are presented in various embodiments of the present invention to help the reader better understand the invention. However, the technical solution claimed by the present invention can be carried out without such technical details and the various changes and modifications based on the embodiments below.

[0020] Figure 2 is a schematic diagram of the structure of the lens module provided in Embodiment 1 of the present invention. Referring to Figure 2, a first embodiment of the present invention provides a lens module 200 which includes: a plurality of lenses arranged sequentially from the object side to the image side, wherein any lens among the plurality of lenses has an image side facing the image side and an object side facing the object side, and includes at least one gentle surface between the object side and the image side. The angle between the tangent to a point other than the center of the surface within the optically effective diameter used for imaging on the gentle surface and the tangent to the center of the gentle surface is 0° to 20°. At least one of the plurality of lenses is a specific wavelength absorbing glass lens. At least one of the gentle surfaces is located on the specific wavelength absorbing glass lens. The lens module 200 also includes an ultraviolet-infrared cut film 201. The ultraviolet-infrared cut film 201 is located on the gentle surface of the specific wavelength absorbing glass lens. The ultraviolet-infrared cut film 201 has an absorbing effect on light in the ultraviolet and infrared wavelength bands. The cut wavelength band range is 350 to 420 nm and 690 to 1200 nm. This embodiment uses seven lenses as an example, and includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0021] In this embodiment, the first lens L1 is a specific wavelength absorbing glass lens, the second lens L2 is a plastic lens, the third lens L3 is a plastic lens, the fourth lens L4 is a plastic lens, the fifth lens L5 is a plastic lens, the sixth lens L6 is a plastic lens, and the seventh lens L7 is a plastic lens.

[0022] To ensure understanding, the embodiments of the present invention use seven lenses as an example, but in other embodiments, the number of lenses in the lens module may be other numbers, for example, three, four, five, six, or eight. The embodiments of the present invention use one specific wavelength absorbing glass lens as an example in the lens module, and the ultraviolet-infrared cut film is located on the smooth surface of the glass lens, but in other embodiments, the number of specific wavelength absorbing glass lenses in the lens module may be more than one, for example, two, three, etc., and when the number of glass lenses in the lens module is more than one, the ultraviolet-infrared cut film can be located on the smooth surface of any specific wavelength absorbing glass lens. In the lens module of the embodiments of the present invention, the first lens L1 is exemplified as a specific wavelength absorbing glass lens, but in other embodiments, it may be other lenses, for example, the second lens L2, the third lens L3, or the fourth lens L4, etc., are specific wavelength absorbing glass lenses. In this embodiment, an example is shown where the image side of the first lens L1 is the smooth surface, but in practice, the object side of the first lens L1 may be the smooth surface.

[0023] A specific wavelength absorbing glass lens has an absorbing effect in the 550nm to 1100nm range and can absorb light in the infrared wavelength band. Therefore, it can improve the infrared cut absorption value of the lens module 200 and can be a blue glass lens or a dyed glass (colored glass) that has an absorbing effect in the infrared wavelength band.

[0024] In this embodiment, the first lens L1 can be a blue glass lens. The blue glass lens is made from blue glass material, and its effect is to filter infrared light by absorption. Since blue wavelengths have relatively high transmittance, the blue glass lens has better transmittance than other glass lenses. In other embodiments, the first lens L1 may be a green glass lens that absorbs light in the infrared wavelength range.

[0025] In this embodiment, the lenses of the lens module 200 may all be aspherical lenses. Aspherical lenses can provide a more natural visual effect with less visual distortion, making objects appear more realistic and improving the optical performance of the lens module 200. Aspherical lenses also have high durability and wear resistance, which can improve the reliability of the lens module 200.

[0026] In other embodiments, the lens of the lens module may be a spherical lens.

[0027] The first lens L1 can be manufactured using wafer-level glass technology (WLG), molded glass technology (GMO), or wafer-level optical element technology (WLO). WLG wafer-level glass technology processes and shapes a glass wafer in a series of steps including softening, high-precision mold alignment and heating, cutting, cleaning, and film formation. GMO molded glass technology manufactures and shapes a glass substrate in a process including heating, press molding, temperature reduction, material removal, and film formation. WLO wafer-level optical element technology involves coating a glass substrate with optical rubber, photocuring and molding, and finally cutting and shaping. Of these, WLG technology is superior in terms of feasibility for mass production, production efficiency, lens accuracy, and performance, and can improve the quality and production efficiency of the lens module 200.

[0028] Figure 3 is a schematic diagram of the structure of the first lens in the lens module provided by Embodiment 1 of the present invention. Figure 4 is a schematic diagram of a partial structure of Figure 3.

[0029] Referring to Figures 3 and 4 simultaneously, the angle between the tangent to a point other than the surface center within the optically effective diameter used for imaging on a gentle surface and the tangent to the center of the gentle surface is 0° to 20°, for example, 0°, 3°, 6°, 9°, 12°, 15°, 18°, or 20°. The angle between the tangent to a point at a different location on the gentle surface other than the surface center is actually different from the angle between the tangent to the center of the gentle surface. However, the values ​​of the angle between the tangents are all between 0° and 20°, and the angle between the tangents is within this range, which relatively reduces the spectral angular drift between the first lens center and the edge position, thereby improving the angular drift problem of the lens module 200.

[0030] To ensure clarity, Figure 4 schematically shows the smooth surface of the first lens in this embodiment, and can be similarly referenced for the smooth surfaces of other lenses.

[0031] The ultraviolet-infrared cut film 201 is an IRCUT (Infra-Red Cut) film used to cut light in the infrared wavelength range. The ultraviolet-infrared cut film 201 has a relatively high infrared cut absorption value, which causes the infrared cut absorption value of the lens module 200 to be relatively high.

[0032] Furthermore, depositing an ultraviolet-infrared cut film on the surface of a plastic lens, such as a resin lens, results in problems such as low film layer performance, large changes in surface shape, poor stability, and low reliability. Depositing an ultraviolet-infrared cut film on the surface of a white glass lens results in a reddish film color, affecting the appearance of the lens. Depositing an ultraviolet-infrared cut film on a specific wavelength absorbing glass lens eliminates the problem of red coloration, while simultaneously offering advantages such as high film layer performance, small changes in surface shape, good stability, and good reliability. Therefore, the embodiment of the present invention allows for the deposition of an ultraviolet-infrared cut film on a specific wavelength absorbing glass lens, thereby improving the imaging quality of the lens module.

[0033] Selectively, the ultraviolet-infrared cut film 201 can be deposited on the loose surface of the first lens L1 by an atomic layer deposition process, and the ultraviolet-infrared cut film 201 has relatively high uniformity and density on the loose surface of the first lens L1, improving the reliability of the cut film 201 in filtering infrared light.

[0034] Selectively, the ultraviolet-infrared cut film 201 can be further deposited (PVD, Physical Vapor Deposition) onto the smooth surface of the first lens L1 by a physical vapor deposition process. PVD can achieve a relatively high thin-film deposition rate, accelerating the deposition rate of the ultraviolet-infrared cut film 201 on the first lens L1, thereby increasing the production efficiency of the lens module 200. PVD can also be carried out at lower temperatures, reducing thermal stress and oxidation risks of the base material. As a result, the ultraviolet-infrared cut film 201 can have relatively high crystallinity, density, and flatness, thereby improving the reliability of the lens module 200. Compared to other deposition techniques, PVD does not use chemical reactions or high-temperature heat sources, thus reducing energy consumption.

[0035] Selectively, the lens module 200 also includes an anti-reflective coating 202. The anti-reflective coating 202 is located on the object side and the image side of the lens. The anti-reflective coating 202, also known as an AR (anti-reflection) coating or a light-enhancing coating, is used to reduce or eliminate reflected light from optical surfaces such as prisms and plane mirrors, thereby increasing the amount of light transmitted by the lens, allowing light rays to be presented to the user to the maximum extent, and improving the optical performance of the lens module 200.

[0036] Figure 5 is a schematic diagram of the structure of the lens module provided in Example 2 of the present invention. Referring to Figure 5, a second embodiment of the present invention provides a lens module 300. The second embodiment is basically the same as the first embodiment, and the meaning of the reference numerals is the same as in the first embodiment. The ultraviolet-infrared cut film 301 and the anti-reflective coating 302 can be found in the corresponding descriptions of the first embodiment and are omitted here.

[0037] In this embodiment, the first lens L1 is a specific wavelength absorbing glass lens, the second lens L2 is a plastic lens, the third lens L3 is a plastic lens, the fourth lens L4 is a plastic lens, the fifth lens L5 is a plastic lens, the sixth lens L6 is a plastic lens, and the seventh lens L7 is a plastic lens.

[0038] The lens module 300 also includes an absorbent coating layer, the absorbent coating layer 303 which absorbs light of a specific wavelength, the specific wavelength including at least one of the ultraviolet wavelength band, the infrared wavelength band, and the near-infrared wavelength band. When the absorbent coating layer 303 has an absorbing effect on light in the infrared wavelength band, the infrared cut absorption value of the lens module 300 can be improved, and at the same time, the transmittance difference between different incident angles can be further reduced.

[0039] In this embodiment, an absorbent coating layer 303 and an ultraviolet-infrared cut film 301 are provided on the gently sloping surface of the first lens L1, with the absorbent coating layer 303 provided between the ultraviolet-infrared cut film 301 and the gently sloping surface of the first lens L1. The absorbent coating layer 303 can be manufactured on the gently sloping surface of the first lens L1 by employing a spin coating process. The spin coating process is simple to operate, inexpensive, and advantageous in improving the manufacturing efficiency of the absorbent coating layer 303 and reducing production costs. Furthermore, because the gently sloping surface is relatively smooth, the reliability of spin coating of the absorbent coating layer 303 onto the first lens L1 can be improved.

[0040] In this embodiment, the absorbent coating layer 303 is located between the smooth surface of the first lens L1 and the ultraviolet-infrared cut film 301. When manufacturing the absorbent coating layer 303 and the ultraviolet-infrared cut film 301 on the first lens L1, compared to a solution in which the ultraviolet-infrared cut film 301 is deposited on the first lens L1 first and then the absorbent coating layer 303 is spin-coated onto the surface of the ultraviolet-infrared cut film 301, the problem of insufficient adhesion of the absorbent coating layer 303 due to spin-coating the absorbent coating layer 303 on the first lens L1 first and then depositing the ultraviolet-infrared cut film 301 on the absorbent coating layer 303 and spin-coating the absorbent coating layer 303 onto the ultraviolet-infrared cut film 301 does not occur. As a result, the absorbent coating layer 303 is located between the smooth surface of the first lens L1 and the ultraviolet-infrared cut film 301, improving the reliability of the lens module 300.

[0041] Figure 6 is a schematic diagram of the structure of the lens module provided in Embodiment 3 of the present invention. Referring to Figure 6, a second embodiment of the present invention provides a lens module 400. The third embodiment is basically the same as the first embodiment, and the meaning of the reference numerals is the same as in the first embodiment. The ultraviolet-infrared cut film 401 and the anti-reflective coating 402 can be found in the corresponding descriptions of the first embodiment and are omitted here.

[0042] In this embodiment, the first lens L1 is a specific wavelength absorbing glass lens, the second lens L2 is a plastic lens, the third lens L3 is a plastic lens, the fourth lens L4 is a plastic lens, the fifth lens L5 is a plastic lens, the sixth lens L6 is a plastic lens, and the seventh lens L7 is a plastic lens.

[0043] The lens module 400 further includes an absorbing coating layer 403 that absorbs light of a specific wavelength, the specific wavelength includes at least one of the ultraviolet wavelength band, the infrared wavelength band, and the near-infrared wavelength band, and if the absorbing coating layer 403 has an absorbing effect on light in the infrared wavelength band, the infrared cut absorption value of the lens module 400 can be increased.

[0044] The absorbent coating layer 403 is located on the gentle surface of the third lens L3. The absorbent coating layer 403 can be manufactured on the gentle surface of the third lens L3 by employing a spin coating process. The spin coating process is simple to operate, inexpensive, advantageous in improving the manufacturing efficiency of the absorbent coating layer 403 and reducing production costs, and the gentle surface is relatively smooth, which can improve the reliability of spin coating of the absorbent coating layer 403 onto the third lens L3.

[0045] While this embodiment uses an absorbent coating layer on a third lens L3 as an example, it can be understood that in other embodiments, the absorbent coating layer may be on the smooth surface of another plastic lens.

[0046] Figure 7 is a schematic diagram of the structure of the lens module provided in Embodiment 4 of the present invention. Referring to Figure 7, a fourth embodiment of the present invention provides a lens module 500 which includes: a plurality of lenses arranged sequentially from the object side to the image side, each of the plurality of lenses having an image side facing the image side and an object side facing the object side, and including at least one gentle surface between the object side and the image side. The angle between the tangent to a point other than the center of the surface within the optically effective diameter used for imaging on the gentle surface and the tangent to the center of the gentle surface is 0° to 20°, and the plurality of lenses include at least one specific wavelength absorbing glass lens and at least one second glass lens. The lens module 200 also includes an ultraviolet-infrared cut film 201. The ultraviolet-infrared cut film 201 is placed on the gentle surface of the second glass lens. The ultraviolet-infrared cut film 201 has an absorbing effect on light in the infrared wavelength band. This embodiment takes seven lenses as an example and includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0047] In this embodiment, the first lens L1 is a specific wavelength absorbing glass lens, the second lens L2 is a plastic lens, the third lens L3 is a second glass lens, the fourth lens L4 is a plastic lens, the fifth lens L5 is a plastic lens, the sixth lens L6 is a plastic lens, and the seventh lens L7 is a plastic lens.

[0048] To ensure understanding, the embodiments of the present invention use seven lenses as an example, but in other embodiments, the number of lenses in the lens module may be a different number, for example, three, four, five, six, or eight. The embodiments of the present invention include one specific wavelength absorbing glass lens and one second glass lens in the lens module, and the ultraviolet-infrared cut film may be located on the smooth surface of the second glass lens, and in other embodiments, the ultraviolet-infrared cut film may be located on the smooth surface of the specific wavelength absorbing glass lens. In the lens module of the embodiments of the present invention, the first lens L1 is exemplified as the specific wavelength absorbing glass lens, but in other embodiments, other lenses, for example, the second lens L2, the third lens L3, or the fourth lens L4, etc., may be the specific wavelength absorbing glass lens. In the lens module of the embodiments of the present invention, the third lens L3 is exemplified as the second glass lens, but in other embodiments, other lenses, for example, the first lens L1, the second lens L2, or the fourth lens L4, etc., may be the second glass lens.

[0049] The second glass lens is a lens made of glass material, and may be a white glass lens or the like.

[0050] The specific wavelength absorbing glass lens, the ultraviolet-infrared cut film 501, and the anti-reflective coating 502 in this embodiment can be described by referring to the description of the first embodiment, and are therefore omitted here.

[0051] Figure 8 is a schematic diagram of the structure of the lens module provided in Embodiment 5 of the present invention. Referring to Figure 8, the fifth embodiment of the present invention provides a lens module 600. The fifth embodiment is basically the same as the fourth embodiment, and the meaning of the reference numerals is the same as in the first embodiment. The ultraviolet-infrared cut film 601 and the anti-reflective coating 602 can be found in the corresponding description of the fourth embodiment and are omitted here.

[0052] In this embodiment, the first lens L1 is a specific wavelength absorbing glass lens, the second lens L2 is a plastic lens, the third lens L3 is a second glass lens, the fourth lens L4 is a plastic lens, the fifth lens L5 is a plastic lens, the sixth lens L6 is a plastic lens, and the seventh lens L7 is a plastic lens.

[0053] The lens module 600 further includes an absorbing coating layer 603 that absorbs light of a specific wavelength, the specific wavelength includes at least one of the ultraviolet wavelength band, the infrared wavelength band, and the near-infrared wavelength band, and if the absorbing coating layer 603 has an absorbing effect on light in the infrared wavelength band, the infrared cut absorption value of the lens module 600 can be increased.

[0054] In this embodiment, both the absorbent coating layer 603 and the ultraviolet-infrared cut film 601 are provided on the gentle surface of the third lens L3, with the absorbent coating layer 603 provided between the ultraviolet-infrared cut film 301 and the gentle surface of the third lens L3. Compared to a solution in which the ultraviolet-infrared cut film 601 is deposited on the third lens L3 first and then the absorbent coating layer 603 is spin-coated onto the surface of the ultraviolet-infrared cut film 601, this method spin-coats the absorbent coating layer 603 on the third lens L3 first and then deposits the ultraviolet-infrared cut film 601 onto the absorbent coating layer 603, thus avoiding the problem of insufficient adhesion of the absorbent coating layer 603 that occurs when spin-coating the absorbent coating layer 603 onto the ultraviolet-infrared cut film 301. As a result, the absorbent coating layer 603 is positioned between the gentle surface of the third lens L3 and the ultraviolet-infrared cut film 601, improving the reliability of the lens module 600.

[0055] Figure 9 is a schematic diagram of the structure of the lens module provided in Embodiment 6 of the present invention. Referring to Figure 9, the sixth embodiment of the present invention provides a lens module 700. The sixth embodiment is basically the same as the fourth embodiment, and the meaning of the reference numerals is the same as in the fourth embodiment. The ultraviolet-infrared cut film 701 and the anti-reflective coating 702 can be found in the corresponding descriptions of the fourth embodiment and are omitted here.

[0056] In this embodiment, the first lens L1 is a specific wavelength absorbing glass lens, the second lens L2 is a plastic lens, the third lens L3 is a second glass lens, the fourth lens L4 is a plastic lens, the fifth lens L5 is a plastic lens, the sixth lens L6 is a plastic lens, and the seventh lens L7 is a plastic lens.

[0057] The lens module 700 further includes an absorbing coating layer 703 that absorbs light of a specific wavelength, the specific wavelength includes at least one of the ultraviolet wavelength band, the infrared wavelength band, and the near-infrared wavelength band, and if the absorbing coating layer 703 has an absorbing effect on light in the infrared wavelength band, the infrared cut absorption value of the lens module 700 can be increased.

[0058] In this embodiment, the ultraviolet-infrared cut film 701 is provided on the smooth surface of the specific wavelength absorbing glass lens, and the absorbent coating layer 703 is provided on the smooth surface of the second glass lens. In other embodiments, the ultraviolet-infrared cut film 701 is provided on the smooth surface of the second glass lens, and the absorbent coating layer 703 is provided on the smooth surface of the second glass lens.

[0059] Figure 10 is a schematic diagram of the structure of the lens module provided in Embodiment 7 of the present invention. Referring to Figure 10, the seventh embodiment of the present invention provides a lens module 800. The seventh embodiment is basically the same as the fourth embodiment, and the meaning of the reference numerals is the same as in the fourth embodiment. The ultraviolet-infrared cut film 801 and the anti-reflective coating 802 can be found in the corresponding descriptions of the fourth embodiment and are omitted here.

[0060] In this embodiment, the first lens L1 is a specific wavelength absorbing glass lens, the second lens L2 is a second glass lens, the third lens L3 is a plastic lens, the fourth lens L4 is a plastic lens, the fifth lens L5 is a plastic lens, the sixth lens L6 is a plastic lens, and the seventh lens L7 is a plastic lens.

[0061] The lens module 800 further includes an absorbing coating layer 803 that absorbs light of a specific wavelength, the specific wavelength includes at least one of the ultraviolet wavelength band, the infrared wavelength band, and the near-infrared wavelength band, and if the absorbing coating layer 803 has an absorbing effect on light in the infrared wavelength band, the infrared cut absorption value of the lens module 800 can be increased.

[0062] In this embodiment, the absorbent coating layer 803 is provided on the smooth surface of the plastic lens.

[0063] Figure 11 is a schematic diagram of the configuration of the lens module provided in Comparative Example 2. Referring to Figure 11, in Comparative Example 2, the meaning of the reference numerals in the lens module 900 is the same as that of the first embodiment. The ultraviolet-infrared cut film 901 and the anti-reflective coating 902 can be found in the corresponding descriptions in the first embodiment and are omitted here.

[0064] Table 1 shows the condition of the lenses in the lens modules of Comparative Example 1, Comparative Example 2, Example 1, and Example 2. JPEG2026514606000002.jpg173164

[0065] The configurations of the corresponding lens modules for Comparative Example 1 and Comparative Example 2 in Table 1 can be seen in Figures 1 and 11, respectively, and the configurations of the corresponding lens modules for Example 1 and Example 2 can be seen in Figures 2 and 5, respectively. In Table 1, R1 and R2 correspond to the object side and image side of the lens, respectively.

[0066] The lens module provided by Comparative Example 2 also does not include a filter. Although Comparative Example 2 also uses an ultraviolet-infrared cut film to replace the filter of Comparative Example 1 and make the lens module even thinner, Comparative Example 2 still suffers from angular drift problems and relatively strong ghosting. The analysis will be developed below in conjunction with the attached drawings.

[0067] Figure 12 shows the light transmittance curves for the lens module of Comparative Example 1 at 0° and 30° incidence. Figure 13 shows the light transmittance curves for the lens module of Comparative Example 2 at 0° and 30° incidence. Figure 14 shows the light transmittance curves for the lens module of Example 1 at 0° and 30° incidence. Figure 15 shows the light transmittance curves for the lens module of Example 2 at 0° and 30° incidence. Here, the solid line represents an incidence angle of 0°, and the dashed line represents an incidence angle of 30°.

[0068] Referring simultaneously to Figures 12 to 15, the lens modules of Comparative Example 1, Comparative Example 2, and Example 1 exhibit angular drift problems at incident angles of 0° and 30°. Of these, the angular displacement of Example 1 is slightly lower than that of Comparative Example 1, and the angular displacement of Example 2 is relatively small, clearly smaller than that of Comparative Examples 1, 2, and 3. Therefore, the lens modules of the embodiments of the present invention can improve the angular displacement problems present in lens modules of related technologies.

[0069] Figure 16 is a schematic diagram of the internal transmittance curves when light is irradiated onto the blue glass lenses in Comparative Example 1, Example 1, and Example 2.

[0070] Referring to Figure 16, the blue glass lenses in Comparative Example 1, Example 1, and Example 2 have clear absorption in the 550nm to 1100nm range, with a relatively strong absorption around 830nm. It can be understood that the blue glass lens in Comparative Example 1 is the filter of Comparative Example 1, the blue glass lens in Example 1 is the first lens, and the blue glass lens in Example 2 is the first lens. The blue glass lenses of Comparative Example 1, Example 1, and Example 2 all absorb light in the infrared wavelength range, and therefore the first lenses of Example 1 and Example 2 can replace the filter of Comparative Example 1, and the lens modules of Example 1 and Example 2 can be made even lighter and thinner.

[0071] Figure 17 is a schematic diagram of the internal transmittance curve when light is irradiated onto the dyed plastic lens in Comparative Example 2. Referring to Figure 17, the dyed plastic lens in Comparative Example 2 shows clear absorption in the 380nm-480nm and 600nm-800nm ​​ranges, with a relatively strong absorption around 710nm. The dyed plastic lens in Comparative Example 2 has relatively strong absorption in the infrared wavelength band, which allows the lens module of Comparative Example 2 to have a relatively high infrared cut-off absorption value.

[0072] Figure 18 is a schematic diagram of the transmittance curve when light is irradiated onto the blue glass lens in Example 2. Referring to Figure 18, the absorbent coating layer in Example 2 shows clear absorption at 380nm-480nm and 580nm-800nm, with relatively strong absorption around 380nm and 700nm-750nm. The absorbent coating layer exhibits relatively strong absorption for light in the infrared wavelength range, which can improve the infrared cut-off absorption value of the lens module in Example 2.

[0073] Figure 19 is a schematic diagram of the ghost simulation of the lens module in Comparative Example 1. Figure 20 is an enlarged schematic diagram of area A1 in Figure 19, and its formed optical path is as follows: Light rays incident from 0° on the object side pass through all the lenses, are reflected by the object side of the filter, and then sequentially pass through the seventh lens, the sixth lens, and the fifth lens, and are reflected by the object side of the fifth lens, and then sequentially pass through the sixth lens, the seventh lens, and the filter before reaching the image plane. Figure 21 is an enlarged schematic diagram of area B1 in Figure 19, and its formed optical path is as follows: Light rays incident from 0° on the object side pass through all the lenses, are reflected by the object side of the filter, and then pass through the seventh lens, and are reflected by the image side of the sixth lens, and then sequentially pass through the seventh lens and the filter before reaching the image plane. Figure 22 is a schematic diagram of the ghost simulation of the lens module of Comparative Example 2, Figure 23 is a schematic diagram of the ghost simulation of the lens module of Example 1, and Figure 24 is a schematic diagram of the ghost simulation of the lens module of Example 1.

[0074] Referring to Figures 19 to 24 simultaneously, Comparative Example 1 and Comparative Example 2, and Example 1 and Example 2 use the same optically designed lens, and ghost simulations are performed using Lighttools software to obtain Figures 19 to 24. As can be seen from the figures, compared to the ghost phenomenon of the lens module of Comparative Example 1, the ghost phenomenon of the lens modules of Comparative Example 2, Example 1, and Example 2 is clearly reduced after the filter is removed, and the image quality of the lens modules of Comparative Example 2, Example 2, and Example 1 is superior to the image quality of the lens module of Comparative Example 1. The ghost phenomenon of the lens module of Example 2 is the weakest, and the image quality of the lens module of Example 2 is the best.

[0075] Figure 25 is a schematic diagram of the ghost simulation of the lens module of Comparative Example 1. Figure 26 is an enlarged schematic diagram of area A2 in Figure 25, and its formed optical path is as follows: Light rays incident from 5° on the object side pass through all the lenses, are reflected by the object side of the filter, pass through the seventh lens, are reflected by the object side of the seventh lens, and then pass through the seventh lens and the filter in order before reaching the image plane. Figure 27 is an enlarged schematic diagram of area B2 in Figure 25, and its formed optical path is as follows: Light rays incident from 5° on the object side pass through all the lenses, are reflected by the object side of the filter, and then pass through the seventh lens and the sixth lens in order, are reflected by the image side of the fifth lens, and then pass through the sixth lens, the seventh lens, and the filter in order before reaching the image plane. Figure 28 is a schematic diagram of the ghost simulation of the lens module of Comparative Example 2, Figure 29 is a schematic diagram of the ghost simulation of the lens module of Comparative Example 3, and Figure 30 is a schematic diagram of the ghost simulation of the lens module of Example 1.

[0076] Referring simultaneously to Figures 25 to 30, the ghosting phenomenon in the lens module of Comparative Example 1 is significantly reduced in the lens modules of Comparative Example 2, Example 1, and Example 2 after the filter is removed. The image quality of the lens modules of Comparative Example 2, Example 1, and Example 2 is superior to that of the lens module of Comparative Example 1. The ghosting phenomenon in the lens module of Example 2 is the weakest, and the image quality of the lens module of Example 2 is the best.

[0077] Figure 31 is a schematic diagram of the ghost simulation of the lens module of Comparative Example 1, and Figure 32 is a schematic diagram of the ghost simulation of the lens module of Comparative Example 2. Figure 33 is an enlarged schematic diagram of area A3 in Figure 32, and its formed optical path is as follows. Light rays incident from 35° on the object side pass through the first lens, second lens, third lens, fourth lens, and fifth lens, are reflected off the object side of the sixth lens, then pass through the fifth lens, fourth lens, third lens, and second lens, are reflected off the image side of the first lens, and then sequentially pass through the second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, and filter before reaching the image plane. Figure 34 is an enlarged schematic diagram of area B3 in Figure 32, and its formed optical path is as follows. Light rays incident from a 35° angle on the object side pass through the first, second, third, fourth, and fifth lenses, are reflected off the image side of the fifth lens, then pass through the fifth, fourth, third, and second lenses, are reflected off the image side of the first lens, and then sequentially pass through the second, third, fourth, fifth, sixth lenses and a filter before reaching the image plane. Figure 35 is a schematic diagram of the ghost simulation of a lens module with comparative proportion 3. Figure 36 is a schematic diagram of the ghost simulation of the lens module of Example 1.

[0078] Referring simultaneously to Figures 31 to 36, it can be seen that, compared to Comparative Example 1, Comparative Example 2, Example 1, and Example 2 newly increase the ghosting related to the image side of the first lens L1. The ghosting phenomenon in Example 2 is the weakest, and the image quality of the lens module in Example 2 is superior to that of the lens modules in Comparative Example 2 and Example 1.

[0079] It can be understood that when a lens module is actually used, the light rays include a variety of incident rays with different angles of incidence. While the lens module of Example 1 increases ghosting related to some of the image sides of the first lens L1 when the angle of incidence of light rays is 35°, the lens module of Example 1 exhibits relatively weak ghosting when the angle of incidence of light rays is of other values, and weaker than the ghosting of the lens modules of Comparative Examples 1 and 2. Therefore, it is considered that the lens modules of Examples 1 and 2 of the present invention can reduce ghosting and improve the image quality of the lens module.

[0080] Figure 37 is a schematic diagram of the ghost simulation of the lens module of Comparative Example 1, and Figure 38 is an enlarged schematic diagram of area A4 in Figure 37, with the formed optical path being as follows: Light rays incident from the object side at 58° pass through the first lens, then four reflections occur between the object side and the image side of the first lens, and then sequentially pass through the second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens and filter before reaching the image plane. Figure 39 is a schematic diagram of the ghost simulation of the lens module of Comparative Example 2. Figure 40 is a schematic diagram of the ghost simulation of the lens module of Comparative Example 3. Figure 41 is a schematic diagram of the ghost simulation of the lens module of Example 1.

[0081] Referring simultaneously to Figures 37 to 41, the ghosting phenomenon in the lens module of Comparative Example 1 was significantly reduced in the lens modules of Example 2 and Example 1 after the filter was removed. In Comparative Example 2, the ghosting phenomenon was enhanced compared to Comparative Example 1, and the image quality of the lens modules of Example 2 and Example 1 was relatively high.

[0082] By comparing the schematic diagrams of ghost simulations of the lens modules of Comparative Example 1, Comparative Example 2, Example 1, and Example 2 at different angles, it was found that the ghosting phenomenon in Example 1 and Example 2 of the present invention is weaker than that of Comparative Example 1, Comparative Example 2, and Example 1. Thus, Example 1 and Example 2 of the present invention can reduce the ghosting phenomenon of lens modules in related technologies, thereby improving the optical quality of lens modules. Of these, the ghosting phenomenon in Example 2 is weaker than that of Example 1, and the optical quality of the lens module in Example 2 is the best. Table 2 shows the test results of the reliability tests for Comparative Example 1, Comparative Example 2, Example 1, and Example 2.

[0083] Table 2 shows the specific test environments: high temperature and high humidity: 85°C±2°C, 85%±5%RH, 480 hours; high temperature: 85°C±2°C, 600 hours; low temperature: -40°C±2°C, 600 hours; thermal shock: 120 cycles, 1 cycle: -40°C (30 minutes), 85°C (30 minutes), 600 hours. JPEG2026514606000003.jpg34160

[0084] Referring to Table 2, in reliability tests, the appearance of the lens modules of Comparative Example 1, Comparative Example 2, Example 1, and Example 2 was good under different test environments, and there were no problems such as clouding, delamination, cracking, or blistering of the film layer. This indicates that, in the lens modules of the embodiments of the present invention, after depositing a cut film on a glass lens and spin-coating an absorbent coating layer on any of the lenses to replace the filters of related technologies, the lens modules of the embodiments of the present invention still exhibit excellent reliability under different test environments.

[0085] In the embodiment of the lens module described above, the presence of a specific wavelength absorbing glass lens and an ultraviolet-infrared cut film can replace filters in related technologies. This makes the thickness of the lens module in the embodiment of the present invention relatively small. When at least one of the lenses in the lens module is a specific wavelength absorbing glass lens, the ultraviolet-infrared cut film is placed on a gently sloping surface on the specific wavelength absorbing glass lens, and the gently sloping surface is relatively smooth, which reduces spectral drift between the center and edge positions of the lens relatively small. At the same time, the specific wavelength absorbing glass lens improves the angular drift problem with respect to the angle of incidence in the lens module in the embodiment of the present invention. The lens module in the embodiment of the present invention can also reduce ghosting and improve the image quality of the lens module. When the lens module includes at least one specific wavelength absorbing glass lens and at least one second glass lens among its multiple lenses, the ultraviolet-infrared cut film is placed on the gentle surface of the specific wavelength absorbing glass lens or on the gentle surface of the second glass lens, and the gentle surface is relatively smooth, which reduces spectral drift at the center and edge positions of the lens. The lens module of the embodiment of the present invention can improve the angular drift problem, and the lens module of the embodiment of the present invention also reduces ghosting and improves the image quality of the lens module.

[0086] Other embodiments of the present invention provide terminal devices including the lens module described in the above embodiments, where the same or corresponding parts as those in the previous embodiments can be found in the corresponding descriptions of the embodiments and are not described in detail below.

[0087] The terminal device of the present invention may be a smartphone, tablet, laptop computer, or smartwatch.

[0088] Those skilled in the art will understand that the embodiments described above are specific examples for carrying out the present invention, and that in actual use, various modifications can be made in form and detail without departing from the spirit and scope of the invention. Since various changes and modifications can be made without departing from the spirit and scope of the invention, the scope of protection of the present invention shall be limited to that set forth in the claims.

Claims

1. It is a lens module, The system includes a plurality of lenses arranged sequentially from the object side to the image side, wherein any one of the plurality of lenses has an image side facing the image side and an object side facing the object side, and includes at least one gently curved surface within the object side and the image side, and the angle between the tangent to a point on the gently curved surface other than the center of the surface within the optically effective diameter used for imaging and the tangent to the center of the gently curved surface is between 0° and 20°. At least one of the plurality of lenses is a specific wavelength absorbing glass lens, and at least one of the smooth surfaces is located on the specific wavelength absorbing glass lens. A lens module comprising an ultraviolet-infrared cut film, wherein the ultraviolet-infrared cut film is located on the gentle surface of one of the specific wavelength absorbing glass lenses, and the ultraviolet-infrared cut film has the effect of absorbing light in the ultraviolet and infrared wavelength bands.

2. The lens module according to claim 1, further comprising an absorbing coating layer that absorbs light of a specific wavelength including at least one of the ultraviolet wavelength band, the infrared wavelength band, and the near-infrared wavelength band, wherein both the absorbing coating layer and the ultraviolet-infrared cut film are provided on the gentle surface of the specific wavelength absorbing glass lens, and the absorbing coating layer is provided between the ultraviolet-infrared cut film and the gentle surface.

3. The invention further comprises an absorbent coating layer that absorbs light of a specific wavelength, including at least one of the ultraviolet wavelength band, the infrared wavelength band, and the near-infrared wavelength band. The lens module according to claim 1, further comprising one plastic lens, the other smooth surface located on the plastic lens, the ultraviolet-infrared cut film provided on the smooth surface of the specific wavelength absorbing glass lens, and the absorbing coating layer provided on the smooth surface of the plastic lens.

4. The lens module according to claim 1, characterized in that the specific wavelength absorbing glass lens is a blue glass lens or a dyed glass having an absorbing effect in the infrared wavelength band.

5. It is a lens module, The lens includes a plurality of lenses arranged sequentially from the object side to the image side, wherein any one of the plurality of lenses has an image side facing the image side and an object side facing the object side, and includes at least one gentle surface within the object side and the image side, and the angle between the tangent to a point other than the center of the surface within the optically effective diameter used for imaging on the gentle surface and the tangent to the center of the gentle surface is 0° to 20°. The plurality of lenses include at least one specific wavelength absorbing glass lens and at least one second glass lens, A lens module comprising an ultraviolet-infrared cut film, wherein the ultraviolet-infrared cut film is provided on the smooth surface of the specific wavelength absorbing glass lens or on the smooth surface of the second glass lens, and the ultraviolet-infrared cut film has an absorbing effect on light in the ultraviolet and infrared wavelength bands.

6. The lens module according to claim 5, further comprising an absorbent coating layer that absorbs light of a specific wavelength including at least one of the ultraviolet wavelength band, the infrared wavelength band, and the near-infrared wavelength band, wherein the ultraviolet-infrared cut film is provided on the same smooth surface as the absorbent coating layer, and the absorbent coating layer is provided between the ultraviolet-infrared cut film and the smooth surface.

7. The lens module according to claim 5, further comprising an absorbing coating layer that absorbs light of a specific wavelength including at least one of the ultraviolet wavelength band, the infrared wavelength band, and the near-infrared wavelength band, wherein one of the ultraviolet-infrared cut film and the absorbing coating layer is disposed on the gentle surface of the specific wavelength absorbing glass lens, and the other is disposed on the gentle surface of the second glass lens.

8. The lens module according to claim 5, further comprising an absorbing coating layer that absorbs light of a specific wavelength including at least one of the ultraviolet wavelength band, the infrared wavelength band, and the near-infrared wavelength band, and a plastic lens, wherein one of the absorbing coating layers is provided on the smooth surface of the plastic lens.

9. The lens module according to claim 5, characterized in that the specific wavelength absorbing glass lens is a blue glass lens or a dyed glass having an absorbing effect in the infrared wavelength band.

10. A terminal device characterized by including the lens module described in claims 1 to 9.

Images