Coated lens and optical imaging device

Abstract

The present application provides a coated lens and an optical imaging device. The coated lens comprises: a lens substrate; a plurality of high refractive index film layers, the refractive index of which is greater than or equal to 2.0; and a plurality of low refractive index film layers, the refractive index of which is less than or equal to 1.6, wherein the total film thickness D of the plurality of high refractive index film layers is H总 The total film thickness D of the plurality of low refractive index film layers L总 Meet 0.50 <D H总 / D L总 <1.50.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and in particular, to a coated lens and an optical imaging device. Background Art

[0002] Anti-reflection films are usually coated on the surface of optical components such as lenses and prisms to improve the transmittance of optical elements composed of multiple lenses, especially by suppressing the reflection of the visible spectrum, making the brightness of the image and the improved optical instruments easier to see. However, the reflectivity of the existing anti-reflection films in the visible light region is low, but for the near-infrared region, the reflectivity increases with the increase of wavelength. Therefore, it is very necessary to develop a coated lens that takes into account the reflection of the near-infrared region. Summary of the invention

[0003] The embodiments of the present application provide a coated lens and an optical imaging device.

[0004] One aspect of the present application provides a coated lens, the coated lens comprising: a lens substrate; a plurality of high refractive index film layers, the refractive index of which is greater than or equal to 2.0; and a plurality of low refractive index film layers, the refractive index of which is less than or equal to 1.6, wherein the total film thickness D of the plurality of high refractive index film layers is H总 The total film thickness D of the plurality of low refractive index film layers L总 Meet 0.50 <D H总 / D L总 <1.50.

[0005] According to an embodiment of the present application, starting from the lens base, the multiple high refractive index film layers and the multiple low refractive index film layers are stacked in one of the following orders: (HL)m; (HL)mH; (LH)m; and L-(HL)m, wherein H represents a high refractive index film layer, L represents a low refractive index film layer, and m represents the number of repetitions.

[0006] According to an embodiment of the present application, the high refractive index film layer includes any one of the following materials: nitride material, fluoride material, sulfide material, selenide material, silicon hydride, hydrogenated silicon germanium, SiC, Nb2O5, Ta2O5 and Ti oxide.

[0007] According to the embodiment of the present application, the low refractive index film layer includes any one of the following materials: SiO2, Al2O3, TiO2, Nb2O5, Ta2O5, MgF2, NbTiO x , ZrO2, Y2O3, HfO2, S3N4, NbTiO x , boron-based materials and phosphorus-based materials.

[0008] According to an embodiment of the present application, the high refractive index film layer is made of Ti3O5, and the low refractive index film layer is made of Al2O3 and SiO2.

[0009] According to an embodiment of the present application, the refractive index n(H) of the high refractive index film layer satisfies 2.2≤n(H)≤2.3; the refractive index n(L) of the low refractive index film layer satisfies 1.4≤n(L)≤1.6.

[0010] According to an embodiment of the present application, the lens substrate is made of at least one of EP, APEL, Zeonex and PMMA.

[0011] According to an embodiment of the present application, the refractive index n(sub) of the material of the lens substrate satisfies 1.5≤n(sub)≤1.7.

[0012] According to an embodiment of the present application, the coated lens is stacked with a first high refractive index film layer, a first low refractive index film layer, a second high refractive index film layer and a second low refractive index film layer in sequence from the lens base, wherein the thickness ratio of the first high refractive index film layer to the second low refractive index film layer is 3:3:12:10.

[0013] According to an embodiment of the present application, the thickness range of the first high refractive index film layer is 30 to 50 nm; the thickness range of the first low refractive index film layer is 30 to 40 nm; the thickness range of the second high refractive index film layer is 90 to 120 nm; and the thickness range of the second low refractive index film layer is 100 to 150 nm.

[0014] According to an embodiment of the present application, the coated lens is stacked with a first high refractive index film layer, a first low refractive index film layer, a second high refractive index film layer, a second low refractive index film layer, a third high refractive index film layer, a third low refractive index film layer, a fourth high refractive index film layer and a fourth low refractive index film layer in sequence from the lens base, wherein the thickness ratio of the first high refractive index film layer to the fourth low refractive index film layer is 1:5:3:2:7:1:3:9.

[0015] According to an embodiment of the present application, the film thickness range of the first high refractive index film layer is 10 to 15 nm; the film thickness range of the first low refractive index film layer is 40 to 50 nm; the film thickness range of the second high refractive index film layer is 30 to 40 nm; the film thickness range of the second low refractive index film layer is 10 to 20 nm; the film thickness range of the third high refractive index film layer is 70 to 90 nm; the film thickness range of the third low refractive index film layer is 10 to 20 nm; the film thickness range of the fourth high refractive index film layer is 20 to 30 nm; and the film thickness range of the fourth low refractive index film layer is 90 to 110 nm.

[0016] According to the embodiment of the present application, the maximum reflectivity R of the coated lens in the wavelength range of 830nm to 1050nm is max Satisfaction: R max ≤0.8%.

[0017] According to the embodiment of the present application, the average reflectivity R of the coated lens in the wavelength range of 920nm to 980nm is ave Satisfaction: R ave ≤0.3%.

[0018] According to the embodiment of the present application, the reflectivity peak of the coated lens falls within the wavelength range of 430nm to 570nm, and the peak reflectivity R peak Satisfaction: R peak ≤32%.

[0019] According to the embodiment of the present application, the maximum reflectivity R of the coated lens in the wavelength range of 430nm to 630nm is max and the average reflectivity R ave Satisfaction: R max ≤3% and R ave ≤1.8%; the maximum reflectivity R of the coated lens in the wavelength range of 630nm to 900nm max and the average reflectivity R ave Satisfaction: R max ≤2% and R ave ≤1.6%; and the maximum reflectivity R of the coated lens in the wavelength range of 900nm to 980nm max and the average reflectivity R ave Satisfaction: R max ≤0.7%, R ave ≤0.5%.

[0020] One aspect of the present application provides an optical imaging device, characterized in that the optical imaging device comprises at least four of the above-mentioned coated lenses. The average transmittance T of the optical imaging device in the wavelength range of 430nm to 900nm is ave ≥88% and minimum transmittance T min ≥74.5%; average transmittance T in the wavelength range of 900nm to 1050nm ave ≥97.4%.

[0021] The coated lens and optical imaging device provided in the present application have good transmission effects on visible light and near-infrared light, reducing the reflection of light. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0023] Figure 1 This is a schematic structural diagram of a coated lens according to Example 1 of the present application;

[0024] Figure 2A Schematic diagram of the relationship between the reflectivity curves of the coated lens corresponding to different incident light wavelengths in Example 1 of the present application;

[0025] Figure 2B A schematic diagram of the relationship between transmittance curves of the optical imaging device corresponding to different incident light wavelengths in Example 1 of the present application;

[0026] Figure 3 This is a schematic structural diagram of a coated lens according to Example 2 of the present application;

[0027] Figure 4A Schematic diagram of the relationship between the reflectivity curves of the coated lens corresponding to different incident light wavelengths in Example 2 of the present application;

[0028] Figure 4B Schematic diagram of the relationship between transmittance curves of the optical imaging device corresponding to different incident light wavelengths in Example 2 of the present application. DETAILED DESCRIPTION

[0029] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0030] It should be noted that, in the present specification, the expressions first, second, third, etc. are only used to distinguish one feature from another feature, but do not mean any limitation to the features.

[0031] In the drawings, the thickness, size and shape of the film layer have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0032] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0033] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] The features, principles and other aspects of the present application are described in detail below.

[0036] In order to meet the requirements of the sensor for transmission of visible light and near-infrared light, the present invention provides a coated lens. The coated lens includes a lens substrate, a plurality of high refractive index film layers, and a plurality of low refractive index film layers. The refractive index of the high refractive index film layer is greater than or equal to 2.0, and the refractive index of the low refractive index film layer is less than or equal to 1.6, and the total film thickness D of the plurality of high refractive index film layers is H总 The total film thickness D of multiple low refractive index film layers L总 Meet 0.50 <D H总 / D L总 <1.50.

[0037] Specifically, the coated lens provided in the embodiment of the present application is formed by alternately coating a plurality of high refractive index film layers and a plurality of low refractive index film layers on the basis of the lens substrate. For example, in one embodiment, a layer of high refractive index film layer may be first coated on the lens substrate, and then a layer of low refractive index film layer may be coated on the high refractive index film layer. Then, a layer of high refractive index film layer is coated again on the low refractive index film layer, and finally a layer of low refractive index film layer is coated on the outermost layer of high refractive index film layer, and so on, to obtain the desired coated lens. The refractive index of the high refractive index film layer is greater than or equal to 2.0, and the refractive index of the low refractive index film layer is less than or equal to 1.6. The total film thickness D of all high refractive index film layers H总 Total film thickness D of all low refractive index layers L总 Meet 0.50 <D H总 / D L总 <1.50, thereby obtaining a coated lens coated with the above film layer structure, so that the coated lens has a good transmission effect on visible light and near-infrared light, reducing light reflection.

[0038] According to an embodiment of the present application, a plurality of high refractive index film layers and a plurality of low refractive index film layers in a coated lens are stacked in one of the following orders from the lens base: (HL)m, (HL)mH, (LH)m and L-(HL)m, wherein H represents a high refractive index film layer, L represents a low refractive index film layer, and m represents the number of repetitions. When the coating order is (HL)m, the high refractive index film layer and the low refractive index film layer are alternately coated with each other in sequence, and the number of alternating coatings is m times. When the coating order is (HL)mH, the high refractive index film layer and the low refractive index film layer are alternately coated with each other m times, and finally a high refractive index film layer is coated. When the coating order is (LH)m, the low refractive index film layer and the high refractive index film layer are alternately coated with each other in sequence, and the number of alternating coatings is m times. When the coating sequence is L-(HL)m, a low refractive index film layer is first coated on the lens substrate, and then high refractive index film layers and low refractive index film layers are alternately coated m times.

[0039] According to the embodiment of the present application, the high refractive index film layer in the coated lens includes any one of the following materials: nitride material, fluoride material, sulfide material, selenide material, silicon hydride, hydrogenated silicon germanium, SiC, Nb2O5, Ta2O5 and Ti oxide. According to the embodiment of the present application, the low refractive index film layer in the coated lens includes any one of the following materials: SiO2, Al2O3, TiO2, Nb2O5, Ta2O5, MgF2, NbTiO x , ZrO2, Y2O3, HfO2, S3N4, NbTiO x , boron-based materials and phosphorus-based materials.

[0040] According to an embodiment of the present application, the high refractive index film layer in the coated lens is made of Ti3O5, and the low refractive index film layer is made of Al2O3 and SiO2.

[0041] According to the embodiment of the present application, the refractive index n(H) of the high refractive index film layer in the coated lens satisfies 2.2≤n(H)≤2.3; the refractive index n(L) of the low refractive index film layer satisfies 1.4≤n(L)≤1.6.

[0042] According to an embodiment of the present application, the lens substrate in the coated lens is made of at least one of EP, APEL, Zeonex and PMMA. According to an embodiment of the present application, the refractive index n(sub) of the material of the lens substrate in the coated lens satisfies 1.5≤n(sub)≤1.7.

[0043] According to the embodiment of the present application, the coated lens in the coated lens is stacked with a first high refractive index film layer, a first low refractive index film layer, a second high refractive index film layer and a second low refractive index film layer in sequence from the lens base, wherein the thickness ratio of the first high refractive index film layer to the second low refractive index film layer is 3:3:12:10. The coated lens provided in the embodiment of the present application can be obtained by coating 4 layers of film layers, and the physical thickness of each film layer has a certain proportional relationship. Reasonable setting of this proportional relationship can effectively improve the transmittance of the coated lens to visible light and near-infrared light.

[0044] According to an embodiment of the present application, the thickness of the first high refractive index film layer in the coated lens is in the range of 30 to 50 nm; the thickness of the first low refractive index film layer is in the range of 30 to 40 nm; the thickness of the second high refractive index film layer is in the range of 90 to 120 nm; and the thickness of the second low refractive index film layer is in the range of 100 to 150 nm.

[0045] According to the embodiment of the present application, the coated lens in the coated lens is stacked with a first high refractive index film layer, a first low refractive index film layer, a second high refractive index film layer, a second low refractive index film layer, a third high refractive index film layer, a third low refractive index film layer, a fourth high refractive index film layer and a fourth low refractive index film layer in sequence from the lens base, wherein the thickness ratio of the first high refractive index film layer to the fourth low refractive index film layer is 1:5:3:2:7:1:3:9. That is, the coated lens provided in the embodiment of the present application can be obtained by coating 8 layers of film layers, and the physical thickness of each film layer has a certain proportional relationship. By reasonably setting this proportional relationship, the transmittance of the coated lens to visible light and near-infrared light can be effectively improved.

[0046] According to the implementation mode of the present application, in the coated lens: the film thickness range of the first high refractive index film layer is 10-15nm; the film thickness range of the first low refractive index film layer is 40-50nm; the film thickness range of the second high refractive index film layer is 30-40nm; the film thickness range of the second low refractive index film layer is 10-20nm; the film thickness range of the third high refractive index film layer is 70-90nm; the film thickness range of the third low refractive index film layer is 10-20nm; the film thickness range of the fourth high refractive index film layer is 20-30nm and the film thickness range of the fourth low refractive index film layer is 90-110nm.

[0047] According to the embodiment of the present application, the maximum reflectivity R of the coated lens in the wavelength range of 830nm to 1050nm max Satisfy R max According to the embodiment of the present application, the average reflectivity R of the coated lens in the wavelength range of 920nm to 980nm ave Satisfy R ave ≤0.3%.

[0048] According to the embodiment of the present application, the reflectivity peak of the coated lens falls within the wavelength range of 430nm to 570nm, and the peak reflectivity R peak Satisfy R peak ≤32%.

[0049] According to the embodiment of the present application, the maximum reflectivity R of the coated lens in the wavelength range of 430nm to 630nm max and the average reflectivity R ave Satisfaction: R max ≤3% and R ave ≤1.8%; Maximum reflectivity R of coated lens in the wavelength range of 630nm to 900nm max and the average reflectivity R ave Satisfaction: R max ≤2% and R ave ≤1.6%; and the maximum reflectivity R of the coated lens in the wavelength range of 900nm to 980nm max and the average reflectivity R ave Satisfaction: R max ≤0.7%, R ave ≤0.5%.

[0050] The present application also provides an optical imaging device, which includes at least four coated lenses provided by the above embodiments. The optical imaging device provided by the present application can fully utilize the good transmittance of the coated lenses to visible light and near-infrared light to achieve high-quality optical imaging.

[0051] Optimizing the transmittance of lenses for near-infrared light regions is beneficial in many application scenarios. For example, in the field of 3D cameras, this coated lens has a good application prospect. 3D cameras use infrared rays as the emission light, which can solve the problem of ambient lighting influence on visible light. There are currently three mainstream 3D vision technologies used in the industry: structured light technology, time of flight (TOF), and binocular multi-angle stereo imaging. The TOF solution is the most promising because of its convenience and low cost. Among them, the TOF solution uses a special sensor to capture the flight time of near-infrared light from emission to reception, thereby judging the distance of the object. This sensor is generally a near-infrared sensor, which needs to receive and transmit near-infrared light. The coated lens provided in this application can well meet its application needs.

[0052] To further explain the structure of the coated lens provided in the embodiments of the present application, the following embodiments are provided for further explanation.

[0053] Example 1

[0054] Figure 1 Schematic diagram of the structure of the coated lens of Example 1 of the present application. Figure 1 As shown, the coated lens provided in the embodiment of the present application includes a lens substrate 100 and a four-layer film structure. The four-layer film structure is described in detail as follows. The first layer starting from one side of the lens substrate is a first high refractive index film layer 201, the second layer is a first low refractive index film layer 202, the third layer is a second high refractive index film layer 203, and the fourth layer is a second low refractive index film layer 204. The material of each high refractive index film layer is Ti3O5, and the material of each low refractive index film layer is a mixture of Al2O3 and SiO2. The physical thickness ratio of each film layer of the four-layer film structure here is 3:3:12:10, and its thickness unit is nm. The thickness of the first high refractive index film layer 201 is 30 to 50nm. The thickness of the first low refractive index film layer 202 is 30 to 40nm. The thickness of the second high refractive index film layer 203 is 90 to 120nm. The thickness of the second low refractive index film layer 204 is 100 to 150nm.

[0055] Figure 2A Schematic diagram of the relationship between the reflectivity curves of the coated lens corresponding to different incident light wavelengths in Example 1 of the present application. Figure 2A As shown, the coating structure makes the maximum reflectivity R of the coated lens in the near-infrared band of 830nm to 1050nm max ≤0.8%, in the visible light band 430nm ~ 570nm range, the peak reflectivity R of the coated lens peak ≤32%.

[0056] Figure 2BSchematic diagram of the relationship between transmittance curves of an optical imaging device including at least four lenses described above corresponding to different incident light wavelengths in Example 1 of the present application. Figure 2B As shown, the average transmittance T of the optical imaging device comprising at least four of the above lenses in the near-infrared band range of 830nm to 1050nm ave ≥98%, minimum transmittance T in the range of 430nm~570nm min ≥19.6%.

[0057] The coated lens and optical imaging device provided in Example 1 of the present application meet the requirements for use in the near-infrared band and ensure the color appearance requirements of the lens.

[0058] Example 2

[0059] Figure 3 Schematic diagram of the structure of the coated lens of Example 2 of the present application, Figure 3 As shown, the coated lens provided by the present application includes a lens substrate 100 and an eight-layer film structure. The eight-layer film structure is described in detail as follows. Starting from one side of the lens substrate 100, the first layer is a first high refractive index film layer 201, the second layer is a first low refractive index film layer 202, the third layer is a second high refractive index film layer 203, the fourth layer is a second low refractive index film layer 204, the fifth layer is a third high refractive index film layer 205, the sixth layer is a third low refractive index film layer 206, the seventh layer is a fourth high refractive index film layer 207, and the eighth layer is a fourth low refractive index film layer 208. The film material of each high refractive index film layer is Ti3O5, and the film material of each low refractive index film layer is a mixture of Al2O3 and SiO2. The physical thickness ratio of each film layer of the eight-layer film structure here is 1:5:3:2:7:1:3:9, and the thickness unit is nm. The thickness of the first high refractive index film layer 201 is 10 to 15nm. The thickness of the first low refractive index film layer 202 is 40-50 nm. The thickness of the second high refractive index film layer 203 is 30-40 nm, the thickness of the second low refractive index film layer 204 is 10-20 nm, the thickness of the third high refractive index film layer 205 is 70-90 nm, the thickness of the third low refractive index film layer 206 is 10-20 nm, the thickness of the fourth high refractive index film layer 207 is 20-30 nm, and the thickness of the fourth low refractive index film layer 208 is 90-110 nm.

[0060] Figure 4A Schematic diagram of the relationship between the reflectivity curves of the coated lens corresponding to different incident light wavelengths in Example 2 of the present application. Figure 4A As shown in the figure, the film structure makes the average reflectivity R of the coated lens in the near-infrared band range of 830nm to 1050nm ave ≤0.8%; average reflectivity R in the range of 920nm~980nm ave≤0.3%; Maximum reflectivity R in the visible light band of 430nm~630nm max ≤3%, average reflectivity R ave ≤1.8%; Maximum reflectivity R in the range of 630nm~900nm max ≤2%, average reflectivity R ave ≤1.6%.

[0061] Figure 4B Schematic diagram of the relationship between transmittance curves of an optical imaging device including at least four lenses corresponding to different incident light wavelengths in Example 2 of the present application, such as Figure 4B As shown, the average transmittance T of an optical imaging device comprising at least four lenses in the near-infrared band range of 900nm to 1050nm ave ≥97.4%; in the visible light band of 430nm~900nm, the average transmittance T ave ≥88% and minimum transmittance T min ≥74%.

[0062] The coated lens and optical imaging device provided in Example 2 of the present application meet the requirements for use in the near-infrared band, and the optical imaging lens meets the requirements for use in both the visible light and near-infrared bands.

[0063] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

Claims

1. A coated lens, characterized in that: Applied to a 3D camera, the 3D camera uses infrared rays as the emission light, and the coated lens comprises: lens substrate; A plurality of high refractive index film layers, the refractive index being greater than or equal to 2.0; and Multiple low refractive index film layers, the refractive index is less than or equal to 1.6, wherein: The total film thickness D of the plurality of high refractive index film layers H总 The total film thickness D of the plurality of low refractive index film layers L总 Meet 0.50 <D H总 / D L总 <1.50; Wherein, the lens substrate is made of at least one of EP, APEL, Zeonex and PMMA; The refractive index n(sub) of the material of the lens substrate satisfies 1.5≤n(sub)≤1.7; and The maximum reflectivity R of the coated lens in the wavelength range of 830nm to 1050nm max Satisfaction: R max ≤0.8%; average transmittance T in the wavelength range of 830nm to 1050nm ave Satisfaction: T ave ≥98%.

2. The coated lens according to claim 1, characterized in that: Starting from the lens substrate, the plurality of high refractive index film layers and the plurality of low refractive index film layers are stacked in one of the following orders: (HL)m; (HL)mH; (LH)m; and L-(HL)m, Wherein, H represents a high refractive index film layer, L represents a low refractive index film layer, and m represents the number of repetitions.

3. The coated lens according to claim 1, characterized in that: The high refractive index film layer includes any one of the following materials: Nitride materials, fluoride materials, sulfide materials, selenide materials, silicon hydride, hydrogenated silicon germanium, SiC, Nb2O5, Ta2O5 and Ti oxides.

4. The coated lens according to claim 1, characterized in that: The low refractive index film layer includes any one of the following materials: SiO2, Al2O3, TiO2, Nb2O5, Ta2O5, MgF2, NbTiO x , ZrO2, Y2O3, HfO2, S3N4, NbTiO x , boron-based materials and phosphorus-based materials.

5. The coated lens according to claim 1, characterized in that: The high refractive index film layer is made of Ti3O5, and the low refractive index film layer is made of Al2O3 and SiO2.

6. The coated lens according to claim 1, characterized in that: The refractive index n(H) of the high refractive index film layer satisfies 2.2≤n(H)≤2.3; the refractive index n(L) of the low refractive index film layer satisfies 1.4≤n(L)≤1.

6.

7. The coated lens according to claim 1, characterized in that: The coated lens is stacked with a first high refractive index film layer, a first low refractive index film layer, a second high refractive index film layer and a second low refractive index film layer in sequence from the lens base, wherein the thickness ratio of the first high refractive index film layer to the second low refractive index film layer is 3:3:12:

10.

8. The coated lens according to claim 7, characterized in that: The film thickness of the first high refractive index film layer ranges from 30 to 50 nm; The thickness of the first low refractive index film layer is in the range of 30 to 40 nm; The thickness of the second high refractive index film layer is in the range of 90 to 120 nm; and The thickness of the second low refractive index film layer is in the range of 100-150 nm.

9. The coated lens according to claim 1, characterized in that: The reflectivity peak of the coated lens falls within the wavelength range of 430nm to 570nm, and the peak reflectivity R peak satisfy: R peak ≤32％。 10. A coated lens, characterized in that: Applied to a 3D camera, the 3D camera uses infrared rays as the emission light, and the coated lens comprises: lens substrate; A plurality of high refractive index film layers, the refractive index being greater than or equal to 2.0; and Multiple low refractive index film layers, the refractive index is less than or equal to 1.6, wherein: The total film thickness D of the plurality of high refractive index film layers H总 The total film thickness D of the plurality of low refractive index film layers L总 Meet 0.50 <D H总 / D L总 <1.50; Wherein, the lens substrate is made of at least one of EP, APEL, Zeonex and PMMA; The refractive index n(sub) of the material of the lens substrate satisfies 1.5≤n(sub)≤1.7; and The maximum reflectivity R of the coated lens in the wavelength range of 830nm to 1050nm max Satisfaction: R max ≤2%; average transmittance T in the wavelength range of 900nm to 1050nm ave Satisfaction: T ave ≥97.4%.

11. The coated lens according to claim 10, characterized in that: Starting from the lens substrate, the plurality of high refractive index film layers and the plurality of low refractive index film layers are stacked in one of the following orders: (HL)m; (HL)mH; (LH)m; and L-(HL)m, Wherein, H represents a high refractive index film layer, L represents a low refractive index film layer, and m represents the number of repetitions.

12. The coated lens according to claim 10, characterized in that: The high refractive index film layer includes any one of the following materials: Nitride materials, fluoride materials, sulfide materials, selenide materials, silicon hydride, hydrogenated silicon germanium, SiC, Nb2O5, Ta2O5 and Ti oxides.

13. The coated lens according to claim 10, characterized in that: The low refractive index film layer includes any one of the following materials: SiO2, Al2O3, TiO2, Nb2O5, Ta2O5, MgF2, NbTiO x , ZrO2, Y2O3, HfO2, S3N4, NbTiO x , boron-based materials and phosphorus-based materials.

14. The coated lens according to claim 10, characterized in that: The high refractive index film layer is made of Ti3O5, and the low refractive index film layer is made of Al2O3 and SiO2.

15. The coated lens according to claim 10, characterized in that: The refractive index n(H) of the high refractive index film layer satisfies 2.2≤n(H)≤2.3; the refractive index n(L) of the low refractive index film layer satisfies 1.4≤n(L)≤1.

6.

16. The coated lens according to claim 10, characterized in that: The coated lens is stacked with a first high refractive index film layer, a first low refractive index film layer, a second high refractive index film layer, a second low refractive index film layer, a third high refractive index film layer, a third low refractive index film layer, a fourth high refractive index film layer and a fourth low refractive index film layer in sequence from the lens base, wherein the thickness ratio of the first high refractive index film layer to the fourth low refractive index film layer is 1:5:3:2:7:1:3:

9.

17. The coated lens according to claim 16, characterized in that: The thickness of the first high refractive index film layer is in the range of 10 to 15 nm; The thickness of the first low refractive index film layer is in the range of 40 to 50 nm; The thickness of the second high refractive index film layer is in the range of 30 to 40 nm; The thickness of the second low refractive index film layer is in the range of 10 to 20 nm; The thickness of the third high refractive index film layer ranges from 70 to 90 nm; The thickness of the third low refractive index film layer is in the range of 10 to 20 nm; The film thickness of the fourth high refractive index film layer is in the range of 20 to 30 nm; and The film thickness of the fourth low refractive index film layer is in the range of 90 to 110 nm.

18. The coated lens according to claim 10, characterized in that: The average reflectivity R of the coated lens in the wavelength range of 920nm to 980nm ave satisfy: R ave ≤0.3％。 19. The coated lens according to claim 14, characterized in that: The maximum reflectivity R of the coated lens in the wavelength range of 430nm to 630nm max and the average reflectivity R ave Satisfaction: R max ≤3% and R ave ≤1.8%; The maximum reflectivity R of the coated lens in the wavelength range of 630nm to 900nm max and the average reflectivity R ave Satisfaction: R max ≤2% and R ave ≤ 1.6%; and The maximum reflectivity R of the coated lens in the wavelength range of 900nm to 980nm max and the average reflectivity R ave Satisfaction: R max ≤0.7%, R ave ≤0.5%.

20. An optical imaging device, characterized in that: The optical imaging device comprises at least four coated lenses according to any one of claims 1-19.

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