CN210119590U - Coated lens and optical imaging device - Google Patents
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- CN210119590U CN210119590U CN201920994782.3U CN201920994782U CN210119590U CN 210119590 U CN210119590 U CN 210119590U CN 201920994782 U CN201920994782 U CN 201920994782U CN 210119590 U CN210119590 U CN 210119590U
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Abstract
The embodiment of the 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 having a refractive index of greater than or equal to 2.0; and a plurality of low refractive index film layers having a refractive index of 1.6 or less, wherein the total film layer thickness D of the plurality of high refractive index film layersH assemblyTotal film layer thickness D with the plurality of low refractive index film layersL TotalSatisfies 0.50<DH assembly/DL Total<1.50。
Description
Technical Field
The application relates to the field of optical elements, in particular to a coated lens and an optical imaging device.
Background
Antireflection films are generally coated on the surfaces of optical members such as lenses and prisms to improve the transmittance of optical elements composed of a plurality of lenses, and particularly to suppress the reflection of the visible spectrum, so that the brightness of images and the improved optical instruments become easily visible. However, in general, the conventional antireflection film has a low reflectance in the visible light region, but the reflectance in the near infrared region increases with an increase in wavelength. Therefore, it is necessary to develop a coated lens considering the reflection in the near infrared region.
Disclosure of Invention
The embodiment of the application provides a coated lens and an optical imaging device.
An aspect of the application provides a coated lens, coated lens includes: a lens substrate; a plurality of high refractive index film layers having a refractive index of greater than or equal to 2.0; and a plurality of low refractive index film layers having a refractive index of 1.6 or less, wherein the total film layer thickness D of the plurality of high refractive index film layersH assemblyTotal film layer thickness D with the plurality of low refractive index film layersL TotalSatisfies 0.50<DH assembly/DL Total<1.50。
According to an embodiment of the present application, 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 order: (H-L) m; (H-L) m-H; (L-H) m; and L- (H-L) 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.
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, silicon germanium hydride, SiC, Nb2O5、Ta2O5And oxides of Ti.
According to an embodiment of the present application, the low refractive index film layer comprises any one of the following materials: SiO 22、Al2O3、TiO2、Nb2O5、Ta2O5、MgF2、NbTiOx、ZrO2、Y2O3、HfO2、S3N4、NbTiOxBoron-based materials and phosphorus-based materials.
According to the embodiment of the application, the high refractive index film layerFrom Ti3O5Is made of Al and the low refractive index film layer2O3And SiO2And (4) preparing.
According to the embodiment, the refractive index n (H) of the high refractive index film layer satisfies 2.2. ltoreq. n (H). ltoreq.2.3; the refractive index n (L) of the low-refractive-index film layer satisfies 1.4 ≦ n (L) ≦ 1.6.
According to an embodiment of the present application, the lens substrate 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 satisfies 1.5. ltoreq. n (sub) 1.7.
According to the embodiment of the application, the coated lens is sequentially 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 from the lens substrate, 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.
According to the embodiment of the application, the thickness of the first high refractive index film layer is in a range of 30-50 nm; the film thickness range of the first low refractive index film layer is 30-40 nm; the thickness range of the second high-refractive-index film layer is 90-120 nm; and the thickness range of the film layer of the second low refractive index film layer is 100-150 nm.
According to the embodiment of the application, 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 are sequentially stacked from the lens substrate, 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.
According to the embodiment of the application, the thickness of the first high refractive index film layer is in a range of 10-15 nm; the film thickness range of the first low refractive index film layer is 40-50 nm; the thickness range of the second high-refractive-index film layer is 30-40 nm; the film thickness range of the second low refractive index film layer is 10-20 nm; the thickness range of the third high-refractive-index film layer is 70-90 nm; the film thickness range of the third low refractive index film layer is 10-20 nm; the thickness range of the fourth high-refractive-index film layer is 20-30 nm; and the thickness range of the film layer of the fourth low refractive index film layer is 90-110 nm.
According to the embodiment of the application, the maximum reflectivity R of the coated lens in the wavelength range of 830nm to 1050nmmaxSatisfies the following conditions: rmax≤0.8％。
According to the embodiment of the application, the average reflectivity R of the coated lens in the wavelength range of 920nm to 980nmaveSatisfies the following conditions: rave≤0.3％。
According to the embodiment of the application, the reflectivity peak value of the coated lens falls in the wavelength range of 430nm to 570nm, and the peak reflectivity RpeakSatisfies the following conditions: rpeak≤32％。
According to the embodiment of the application, the maximum reflectivity R of the coated lens in the wavelength range of 430nm to 630nmmaxAnd average reflectance RaveSatisfies the following conditions: rmaxNot more than 3% and RaveLess than or equal to 1.8 percent; the maximum reflectivity R of the coated lens in the wavelength range of 630nm to 900nmmaxAnd average reflectance RaveSatisfies the following conditions: rmaxNot more than 2% and RaveLess than or equal to 1.6 percent; and the maximum reflectivity R of the coated lens in the wavelength range of 900nm to 980nmmaxAnd average reflectance RaveSatisfies the following conditions: rmax≤0.7％，Rave≤0.5％。
One aspect of the present application provides an optical imaging device, wherein the optical imaging device comprises at least four pieces of the above-mentioned coated lenses. An average transmittance T of the optical imaging device in a wavelength range of 430nm to 900nmaveNot less than 88% and minimum transmittance TminMore than or equal to 74.5 percent; average transmission T in the wavelength range from 900nm to 1050nmave≥97.4％。
The coated lens and the optical imaging device have good transmission effect on visible light and near infrared light, and reflection of light is reduced.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural view of a coated lens in example 1 of the present application;
FIG. 2A is a graph showing a relationship between reflectivity curves of coated lenses corresponding to different wavelengths of incident light according to example 1 of the present application;
FIG. 2B is a graph illustrating transmittance curves of the optical imaging device corresponding to different incident light wavelengths in example 1 of the present application;
FIG. 3 is a schematic structural view of a coated lens according to example 2 of the present application;
FIG. 4A is a graph showing a relationship between reflectivity curves of coated lenses corresponding to different wavelengths of incident light according to example 2 of the present application;
fig. 4B is a graph illustrating a relationship between transmittance curves of the optical imaging device according to embodiment 2 of the present application.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features.
In the drawings, the thickness, size, and shape of the film layers have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.
It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The features, principles, and other aspects of the present application are described in detail below.
In order to meet the transmission of a sensor to visible light and near infrared light, the embodiment of the application provides a coated lens. The coated lens comprises 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, the refractive index of the low refractive index film layer is less than or equal to 1.6, and the total film layer thickness D of the high refractive index film layersH assemblyTotal film thickness D with multiple low refractive index film layersL TotalSatisfies 0.50<DH assembly/DL Total<1.50。
Specifically, the coated lens provided by the embodiment of the application is based on the lens substrateAnd alternately plating a plurality of high-refractive-index film layers and a plurality of low-refractive-index film layers. For example, in one embodiment, a high refractive index film layer may be deposited on the lens substrate, followed by a low refractive index film layer. Then, a high-refractive-index film layer is plated on the low-refractive-index film layer again, and finally, a low-refractive-index film layer is plated on the outermost high-refractive-index film layer, and so on, so as to obtain the required coated lens. The refractive indexes of the high refractive index film layers are all larger than or equal to 2.0, and the refractive indexes of the low refractive index film layers are all smaller than or equal to 1.6. Total film thickness D of all high refractive index film layersH assemblyTotal film thickness D to all low refractive index film layersL TotalSatisfies 0.50<DH assembly/DL Total<1.50, thus obtaining the coated lens coated with the film layer structure, leading the coated lens to have good transmission effect on visible light and near infrared light and reducing light reflection.
According to the embodiment of the application, the plurality of high refractive index film layers and the plurality of low refractive index film layers in the coated lens are stacked in one of the following orders from the lens substrate: (H-L) m, (H-L) m-H, (L-H) m, and L- (H-L) 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. And under the condition that the coating sequence is (H-L) m, the high refractive index film layer and the low refractive index film layer are sequentially and alternately coated for m times. Under the condition that the film coating sequence is (H-L) m-H, the high refractive index film layer and the low refractive index film layer are sequentially and alternately coated for m times, and finally, a high refractive index film layer is coated. And under the condition that the coating sequence is (L-H) m, the low-refractive-index film layer and the high-refractive-index film layer are sequentially and alternately coated for m times. Under the condition that the film coating sequence is L- (H-L) m, a low-refractive-index film layer is coated on the lens substrate, and then a high-refractive-index film layer and a low-refractive-index film layer are sequentially and alternately coated for m times.
According to the embodiment of the application, the high-refractive-index film layer in the coated lens comprises any one of the following materials: nitride material, fluoride material, sulfide material, selenide material, silicon hydrideGermanium, SiC, Nb2O5、Ta2O5And oxides of Ti. According to the embodiment of the application, the low refractive index film layer in the coated lens comprises any one of the following materials: SiO 22、Al2O3、TiO2、Nb2O5、Ta2O5、MgF2、NbTiOx、ZrO2、Y2O3、HfO2、S3N4、NbTiOxBoron-based materials and phosphorus-based materials.
According to the embodiment of the application, the high-refractive-index film layer in the coated lens is formed by Ti3O5Made of Al and the low refractive index film layer2O3And SiO2And (4) preparing.
According to the embodiment of the application, the refractive index n (H) of the high-refractive-index film layer in the coated lens meets the condition that n (H) is more than or equal to 2.2 and less than or equal to 2.3; the refractive index n (L) of the low-refractive index film layer satisfies 1.4 ≦ n (L) ≦ 1.6.
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 the embodiment of the application, the refractive index n (sub) of the material of the lens substrate in the coated lens meets 1.5 to n (sub) to 1.7.
According to the embodiment of the application, a coated lens in the coated lens is sequentially 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 from a lens substrate, 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 by the embodiment of the application can be obtained by coating 4 layers of films, and the physical thicknesses of the films have a certain proportional relation. The proportional relation is reasonably set, so that the transmissivity of the coated lens to visible light and near infrared light can be effectively improved.
According to the embodiment of the application, the thickness of the first high-refractive-index film layer in the coated lens is in a range of 30-50 nm; the film thickness range of the first low refractive index film layer is 30-40 nm; the thickness range of the second high-refractive-index film layer is 90-120 nm; and the thickness range of the film layer of the second low refractive index film layer is 100-150 nm.
According to the embodiment of the application, a coated lens in the coated lens is sequentially 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 from a lens substrate, 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. Namely, the coated lens provided by the embodiment of the application can be obtained by coating 8 film layers, and the physical thicknesses of the film layers have a certain proportional relation. By reasonably setting the proportional relation, the transmissivity of the coated lens to visible light and near infrared light can be effectively improved.
According to the embodiment of the application, in the coated lens: the thickness range of the first high-refractive-index film layer is 10-15 nm; the film thickness range of the first low refractive index film layer is 40-50 nm; the thickness range of the second high-refractive-index film layer is 30-40 nm; the film thickness range of the second low refractive index film layer is 10-20 nm; the thickness range of the third high-refractive-index film layer is 70-90 nm; the film thickness range of the third low refractive index film layer is 10-20 nm; the thickness range of the fourth high refractive index film layer is 20-30 nm, and the thickness range of the fourth low refractive index film layer is 90-110 nm.
According to the embodiment of the application, the maximum reflectivity R of the coated lens in the wavelength range of 830nm to 1050nmmaxSatisfy RmaxLess than or equal to 0.8 percent. According to the embodiment of the application, the average reflectivity R of the coated lens in the wavelength range of 920nm to 980nmaveSatisfy Rave≤0.3％。
According to the embodiment of the application, the reflectivity peak value of the coated lens falls in the wavelength range of 430nm to 570nm, and the peak reflectivity RpeakSatisfy Rpeak≤32％。
According to the embodiment of the application, the maximum reflectivity R of the coated lens in the wavelength range of 430nm to 630nmmaxAnd average reflectance RaveSatisfies the following conditions: rmaxNot more than 3% and Rave≤1.8Percent; maximum reflectivity R of coated lens in wavelength range of 630nm to 900nmmaxAnd average reflectance RaveSatisfies the following conditions: rmaxNot more than 2% and RaveLess than or equal to 1.6 percent; and the maximum reflectivity R of the coated lens in the wavelength range of 900nm to 980nmmaxAnd average reflectance RaveSatisfies the following conditions: rmax≤0.7％，Rave≤0.5％。
The application also provides an optical imaging device, which comprises at least four coated lenses provided by the above embodiments. The optical imaging device provided by the application can fully utilize the good transmissivity of the coated lens to visible light and near infrared light so as to realize high-quality optical imaging.
Optimizing the transmittance of the lens for the near infrared region is beneficial in many application scenarios. For example, in the field of 3D cameras, the coated lens has good application prospects. The 3D camera adopts the infrared ray as emission light, can solve the ambient light influence problem of visible light. Currently, there are three mainstream 3D vision technologies used in the industry: structured light technology, time of flight (TOF), and binocular polygon stereo imaging. TOF schemes are promising because of their advantages of convenience of use, low cost, etc. In the TOF scheme, the time of flight from emission to reception of near-infrared light is captured by a dedicated sensor, thereby determining the object distance. Such sensors are typically near infrared sensors, which need to receive and transmit near infrared light. The coated lens provided by the application can well meet the application requirements.
To further specifically describe the structure of the coated lens provided in the embodiments of the present application, the following embodiments are described in detail.
Example 1
Fig. 1 is a schematic structural view of a coated lens in embodiment 1 of the present application. As shown in fig. 1, the coated lens provided by 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 below. The first layer 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 secondA low refractive index film layer 204. The material of each high refractive index film layer is Ti3O5The material of each low refractive index film layer is Al2O3And SiO2A mixture of (a). The physical thickness ratio of each film layer of the four-layer film system structure is 3:3:12:10, and the thickness unit is nm. The thickness of the first high refractive index film 201 is 30 to 50 nm. The thickness of the first low refractive index film layer 202 is 30-40 nm. The thickness of the second high refractive index film layer 203 is 90-120 nm. The thickness of the second low refractive index film layer 204 is 100-150 nm.
Fig. 2A is a schematic diagram of a relationship between reflectivity curves of coated lenses corresponding to different incident light wavelengths in embodiment 1 of the present application. As shown in FIG. 2A, the maximum reflectivity R of the coated lens in the near infrared band of 830-1050 nm is obtained by using the film system structuremaxNot more than 0.8 percent, and the peak value reflectivity R of the coated lens is within the range of 430nm to 570nm of visible light wave bandpeak≤32％。
Fig. 2B is a graph illustrating a transmittance curve relationship of an optical imaging device including at least four lenses corresponding to different incident light wavelengths in embodiment 1 of the present application. As shown in FIG. 2B, the average transmittance T of the optical imaging device comprising at least four pieces of the above-mentioned lens in the near infrared band of 830nm to 1050nmaveNot less than 98%, and minimum transmittance T in the range of 430 nm-570 nmmin≥19.6％。
The coated lens and the optical imaging device provided by the embodiment 1 meet the use requirements of near-infrared bands, and the color appearance requirements of the lens are guaranteed.
Example 2
Fig. 3 is a schematic structural view of a coated lens in embodiment 2 of the present application, and as shown in fig. 3, 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 below. 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, and the seventh layer is a fourth high refractive index film layer 207,the eighth layer is a fourth low refractive index film layer 208. The film material of each high refractive index film layer is Ti3O5The film material of each low refractive index film layer is Al2O3And SiO2A mixture of (a). The physical thickness ratio of each film layer of the eight-layer film system structure is 1:5:3:2:7:1:3:9, and the thickness unit is nm. The thickness of the first high refractive index film 201 is 10-15 nm. 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.
Fig. 4A is a schematic diagram of a relationship between reflectivity curves of coated lenses corresponding to different incident light wavelengths in embodiment 2 of the present application. As shown in FIG. 4A, the film system structure makes the average transmittance R of the coated lens in the near infrared band of 830 nm-1050 nmaveLess than or equal to 0.8 percent; average transmittance R in the range of 920nm to 980nmaveLess than or equal to 0.3 percent; maximum transmittance R in the visible light wave band range of 430 nm-630 nmmaxLess than or equal to 3%, average transmission RaveLess than or equal to 1.8 percent; maximum transmittance R in the range of 630nm to 900nm max2% or less, average transmission Rave≤1.6％。
FIG. 4B is a graph showing the transmittance curve of an optical imaging device comprising at least four lenses corresponding to different wavelengths of incident light according to example 2 of the present application, as shown in FIG. 4B, the optical imaging device comprising at least four lenses has an average transmittance T in the near infrared band of 900nm to 1050nmaveMore than or equal to 97.4 percent; the average transmittance T is 430 nm-900 nm in the visible light wave bandaveNot less than 88% and minimum transmittance Tmin≥74％。
The coated lens and the optical imaging device provided by the embodiment 2 meet the use requirements of near-infrared bands, and the optical imaging lens meets the use requirements of transparency in visible light and near-infrared bands.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention herein disclosed is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (9)
1. A coated lens, characterized in that, the coated lens includes:
a lens substrate;
a plurality of high refractive index film layers having a refractive index of greater than or equal to 2.0; and
a plurality of low refractive index film layers having a refractive index of less than or equal to 1.6, wherein,
a total film thickness D of the plurality of high refractive index film layersH assemblyTotal film layer thickness D with the plurality of low refractive index film layersL TotalSatisfies 0.50<DH assembly/DL Total<1.50。
2. A coated lens as claimed in claim 1, wherein the plurality of high refractive index film layers and the plurality of low refractive index film layers are stacked in one of the following order from the lens substrate:
(H-L)m；
(H-L)m-H；
(L-H) m; and
L-(H-L)m，
wherein H denotes a high refractive index film layer, L denotes a low refractive index film layer, and m denotes the number of repetitions.
3. A coated lens as claimed in claim 1, wherein the refractive index n (h) of said 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.
4. A coated lens as claimed in claim 1, wherein the refractive index n (sub) of the material of the lens substrate satisfies 1.5 ≤ n (sub) ≤ 1.7.
5. A coated lens as claimed in claim 1, wherein 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 are sequentially stacked from the lens substrate, wherein a thickness ratio of the first high refractive index film layer to the second low refractive index film layer is 3:3:12: 10.
6. A coated lens as claimed in claim 5, wherein:
the thickness range of the first high-refractive-index film layer is 30-50 nm;
the film thickness range of the first low refractive index film layer is 30-40 nm;
the thickness range of the second high-refractive-index film layer is 90-120 nm; and
the thickness range of the second low refractive index film layer is 100-150 nm.
7. The coated lens of claim 1, wherein 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 are sequentially stacked from the lens substrate, 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.
8. A coated lens as claimed in claim 7, wherein:
the thickness range of the first high-refractive-index film layer is 10-15 nm;
the film thickness range of the first low refractive index film layer is 40-50 nm;
the thickness range of the second high-refractive-index film layer is 30-40 nm;
the film thickness range of the second low refractive index film layer is 10-20 nm;
the thickness range of the third high-refractive-index film layer is 70-90 nm;
the film thickness range of the third low refractive index film layer is 10-20 nm;
the thickness range of the fourth high-refractive-index film layer is 20-30 nm; and
the thickness range of the film layer of the fourth low refractive index film layer is 90-110 nm.
9. An optical imaging device comprising at least four coated lenses according to any of claims 1-8.
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| CN201920994782.3U CN210119590U (en) | 2019-06-28 | 2019-06-28 | Coated lens and optical imaging device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174718A (en) * | 2019-06-28 | 2019-08-27 | 浙江舜宇光学有限公司 | Plated film lens and optical imaging device |
| CN114089452A (en) * | 2021-11-16 | 2022-02-25 | 宁波舜宇奥来技术有限公司 | Microlens element |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174718A (en) * | 2019-06-28 | 2019-08-27 | 浙江舜宇光学有限公司 | Plated film lens and optical imaging device |
| CN114089452A (en) * | 2021-11-16 | 2022-02-25 | 宁波舜宇奥来技术有限公司 | Microlens element |
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