Lens module with integrated architecture

Abstract

The present application discloses a lens module with integrated architecture, comprising first and second lenses, first and second substrates, optical adhesive layer, first and second absorption layers, wherein the first absorption layer comprises copper complex formed by copper compound, phosphonic acid as formula 1 and at least one phosphorus-containing compound as formula 2-4. The lens module of the present application can reduce the size due to the use of integrated architecture, and the process is simplified without assembly. The lens module of the present application exhibits high transmittance to visible light and low transmittance to near infrared, and has excellent near infrared cutoff effect. In addition, when the incident light irradiates the lens module at different angles, the transmittance curve only has a slight shift.

Description

TECHNICAL FIELD

[0001] The present application relates to a lens module, in particular to a lens module with an integrated architecture by integrating components independently arranged in the lens module. BACKGROUND

[0002] A known lens module includes a plurality of components, such as lenses, filters, photosensitive elements, etc. The photosensitive components can be designed to detect different wavelengths of light and have different applications, such as detecting infrared light (which can be applied to 3D detection), visible light (which can be applied to general cameras or video cameras), ultraviolet light (which can be applied to automotive laser radar lenses), and X-rays (which can be applied to digital non-film X-ray machines).

[0003] In the application of general cameras or video cameras, the photosensitive element mainly detects visible light and part of the near-infrared range, however, it is desirable for the photosensitive element to detect only visible light, and the near-infrared is considered as an interference to the image. For this purpose, a separate filter is usually arranged on the light entrance side of the lens module, which has a high absorption rate for near-infrared light and a high transmission rate for other wavelengths of light, which can achieve the purpose of filtering out near-infrared light. However, the existing filter has a transmission rate shift when the incident angle of the incident light changes, and the shift amount is positively correlated with the incident angle, which may cause color deviation when the incident light is incident at a large angle, or even may cause the detection instrument to make a numerical error. Therefore, it is desirable to maintain consistent optical performance under changing incident angles.

[0004] In addition, the lens module needs to increase the volume due to the space for arranging the filter. On the other hand, the lens in the lens module is usually a lens group including a series of lenses, which adjusts the focal length by a focusing motor to focus the light on the photosensitive element. With the market pursuing complex and diverse shooting modes and increasingly high image quality, the number and thickness of the lenses in the lens group increase, leading to the size of the lens module deviating from the trend of device miniaturization. The problem of the size of the lens module has been embodied in mobile phones, and it can be observed that mobile phones generally have a situation where the lens protrudes outward, even for high-end mobile phones, increasing the risk of scratches and damage. SUMMARY

[0005] To solve the above problems, the present application provides a lens module with an integrated architecture, which includes:

[0006] A first lens and a second lens are respectively located on the outermost side of the lens module;

[0007] A first substrate and a second substrate are respectively arranged on the first lens and the second lens;

[0008] An optical bonding layer is arranged on the first substrate or the second substrate and located between the first substrate and the second substrate; and

[0009] a first absorbing layer and a second absorbing layer between the optical adhesive layer and the first substrate or the second substrate,

[0010] wherein the first absorbing layer comprises:

[0011] a copper complex formed from a copper compound to provide copper ions and a phosphonic acid as shown in Formula 1 and at least one phosphorus-containing compound as shown in Formulae 2 to 4,

[0012]

[0013] wherein R, R1, R2, R3 are each independently a substituted or unsubstituted C1 to C 12 alkyl group or a substituted or unsubstituted C6 to C 12 aryl group,

[0014] wherein the first absorbing layer has an OD value of greater than 4 for a 930 nm to 950 nm incident light wavelength,

[0015] wherein the second absorbing layer comprises a near-infrared absorbing dye and an ultraviolet absorbing dye.

[0016] In an embodiment, the substituted or unsubstituted C1 to C 12 alkyl group is selected from the group consisting of a methyl group, an ethyl group, a n-propyl group, an i-propyl group, a n-butyl group, a sec-butyl group, an i-butyl group, a t-butyl group; and the substituted or unsubstituted C6 to C 12 aryl group is selected from the group consisting of a phenyl group, a naphthyl group, a chlorophenyl group.

[0017] In an embodiment, the first absorbing layer has a haze of 0.4% or less.

[0018] In an embodiment, the first absorbing layer has at least one main peak in an X-ray photoelectron spectrum at a binding energy of 930 electron volts (eV) to 940 eV. In another embodiment, the first absorbing layer has a counts per second value of 4500 or more for the at least one main peak in the X-ray photoelectron spectrum.

[0019] In an embodiment, the first absorbing layer has a thickness of 25 μm to 150 μm.

[0020] In an embodiment, the first absorbing layer has a minimum transmittance of 80% or more for a 460 nm to 560 nm incident light wavelength range. In another embodiment, the first absorbing layer has a minimum transmittance of 85% or more for a 460 nm to 560 nm incident light wavelength range.

[0021] In an embodiment, the first absorbing layer has a maximum transmittance of 1% or less for a wavelength range of 830 nm to 1200 nm of incident light. In another embodiment, the first absorbing layer has a maximum transmittance of 0.5% or less for a wavelength range of 830 nm to 1200 nm of incident light.

[0022] In an embodiment, the first absorbing layer further comprises an optical resin. In another embodiment, the optical resin is a thermoplastic resin and / or a photo-curable resin. In another embodiment, the optical resin is selected from the group consisting of polycarbonate-based, polyester-based, polyalkene-based, polyacrylic-based, silicone-based, and polyimide-based. In another embodiment, the optical resin is methyl methacrylate.

[0023] In an embodiment, the optical adhesive layer is an optical adhesive tape or an optical adhesive.

[0024] In an embodiment, the first substrate and the second substrate are made of glass.

[0025] In an embodiment, the first lens and the second lens are made of glass, polycarbonate-based, and polyacrylate-based.

[0026] In an embodiment, the second absorbing layer comprises at least one sub-layer comprising a near-infrared absorbing dye and at least one sub-layer comprising an ultraviolet absorbing dye.

[0027] In an embodiment, the near-infrared absorbing dye is selected from at least one of the group consisting of azo-based compounds, diimmonium-based compounds, dithiol metal complexes, squaraine-based compounds, cyanine-based compounds, and phthalocyanine-based compounds.

[0028] In an embodiment, the ultraviolet absorbing dye is selected from at least one of the group consisting of azomethine-based compounds, indole-based compounds, ketone-based compounds, benzimidazole-based compounds, and triazine-based compounds.

[0029] In an embodiment, the lens module of the present application further comprises a spacer material disposed on the first substrate or the second substrate and surrounding the optical adhesive layer.

[0030] In an embodiment, the lens module of the present application has an OD value greater than 4 for a wavelength of 940 nm of incident light. In another embodiment, the lens module of the present application has an OD value greater than 4.5 for a wavelength of 940 nm of incident light.

[0031] In an embodiment, the lens module of the present application has a haze of 0.5% or less.

[0032] In one embodiment, the lens module of the present application has a maximum transmittance of 0.01% or less for a wavelength range of 930 nm to 950 nm of incident light.

[0033] In one embodiment, the lens module of the present application has a minimum transmittance of 80% or more for a wavelength range of 460 nm to 560 nm of incident light.

[0034] In one embodiment, the lens module of the present application has a passband overlapping with a wavelength range of 350 nm to 850 nm, and a center wavelength of the passband is located in the wavelength range of 350 nm to 850 nm.

[0035] In one embodiment, when the incident light irradiates the lens module of the present application at an incident angle of 0 degree and 30 degrees respectively, the center wavelength of the passband has a shift, and the shift amplitude is 1.4 nm or less. In one embodiment, when the incident light irradiates the lens module of the present application at an incident angle of 0 degree and 35 degrees respectively, the center wavelength of the passband has a shift, and the shift amplitude is 1.9 nm or less.

[0036] The lens module of the present application has an integrated architecture to reduce the size and simplify the process without assembly. The lens module of the present application exhibits high transmittance for visible light and low transmittance for near-infrared light, and more particularly has excellent absorption for near-infrared light with a wavelength of 940 nm, exhibiting excellent near-infrared light cutoff effect. In addition, when the incident light irradiates the lens module of the present application at different angles, the transmittance curve only has a slight shift.

[0037] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments, but is not limited to the present application. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 The figure is a structural schematic diagram of the lens module of the present application.

[0039] Figure 2 The figure is another structural schematic diagram of the lens module of the present application.

[0040] Figure 3 The figure is an X-ray photoelectron spectroscopy of the first absorbing layer in Preparation Example 1.

[0041] Figure 4 The figure is a transmittance curve diagram of blue glass, blue glass + second absorbing layer, and blue glass + first absorbing layer + second absorbing layer, etc. three embodiments.

[0042] Figure 5 Transmittance curve for Example 1 and Comparative Example 1.

[0043] Figure 6 Transmittance curve for Example 2 and Comparative Example 1.

[0044] Figure 7 Transmittance curve for Example 3 and Comparative Example 1.

[0045] Figure 8 Transmittance curve for Example 4 and Comparative Example 1.

[0046] Figure 9 OD value curve for Examples 1 to 4 for 930 nm to 950 nm incident light wavelength.

[0047] Figure 10 Transmittance curve for Example 1 irradiated at 0 degree, 30 degree, 35 degree incident angle respectively.

[0048] Figure 11 Transmittance curve for Example 3 irradiated at 0 degree, 30 degree, 35 degree incident angle respectively.

[0049] Wherein, the main component symbol explanation:

[0050] 11 First substrate

[0051] 12 Second substrate

[0052] 13 First absorption layer

[0053] 14 Second absorption layer

[0054] 21 First lens

[0055] 22 Second lens

[0056] 31 Optical adhesive layer

[0057] 32 Spacer material DETAILED DESCRIPTION

[0058] The scope and effect of the present application can be easily understood by those skilled in the art from the following specific embodiments.

[0059] It is to be understood that the structures, proportions, sizes, etc. shown in the drawings accompanying the present specification are merely intended to assist in the understanding of the content described in the present specification and are not intended to limit the scope of the present application, and therefore, any modification, change in proportional relationship, or adjustment in size, which does not affect the effects and purposes of the present application, should still fall within the scope of the present application. Meanwhile, the terms such as "upper", "first", "second", etc. cited in the present specification are merely intended to facilitate clear description and are not intended to limit the scope of the present application, and any change in relative relationship or adjustment, without substantial change in technical content, should be considered as the scope of the present application.

[0060] When "including", "comprising" or "having" a specific element is described herein, unless otherwise stated, other elements, component parts, structures, regions, portions, devices, systems, steps or connection relationships, etc. can be further included, rather than excluding these other elements.

[0061] Unless otherwise explicitly stated herein, the singular forms "a" and "the" as used herein include plural forms, and "or" and "and / or" as used herein are interchangeable.

[0062] The numerical ranges described herein are inclusive and combinable, and any numerical value falling within the numerical ranges described herein can be used as a maximum or minimum value to derive a sub-range; for example, the numerical range "25 to 200" should be understood as including any sub-range between the endpoints 25 and 200, such as 25 to 150, 30 to 200, 30 to 150, etc.; in addition, if a numerical value falls within each range described herein (e.g. between the maximum and minimum values), it should be considered as included in the scope of the present application.

[0063] The lens module with an integrated architecture of the present application includes first and second lenses, first and second substrates, an optical bonding layer, and first and second absorbing layers.

[0064] Firstly referring to Figure 1 which is a structural schematic diagram of an embodiment of the lens module of the present application, in the integrated architecture of the lens module: the first lens 21 and the second lens 22 are respectively located at the outermost side; the first substrate 11 and the second substrate 12 are respectively arranged on the first lens 21 and the second lens 22; the optical bonding layer 31 is bonded to the second substrate 12 and located between the first substrate 11 and the second substrate 12; the first absorbing layer 13 and the second absorbing layer 14 are located between the optical bonding layer 31 and the first substrate 11. In this embodiment, the layers from bottom to top are in order: the first lens 21, the first substrate 11, the first absorbing layer 13, the second absorbing layer 14, the optical bonding layer 31, the second substrate 12, and the second lens 22.

[0065] Further referring to Figure 2 , which is a structural schematic diagram of another embodiment of the lens module of the present application, and Figure 1 the difference between the two is that the positions of the first absorbing layer 13 and the second absorbing layer 14 are reversed. In this embodiment, the layers from bottom to top are in the following order: the first lens 21, the first substrate 11, the second absorbing layer 14, the first absorbing layer 13, the optical adhesive layer 31, the second substrate 12, and the second lens 22.

[0066] As another embodiment, the optical adhesive layer can also be adhered to the first substrate.

[0067] As another embodiment, the lens module further comprises a spacer material, which is disposed around the optical adhesive layer. As shown in Figure 1 and Figure 2 , the optical adhesive layer 31 is adhered to the second substrate 12, and the spacer material 32 is also formed on the second substrate 12 and around the optical adhesive layer 31. In the case where the optical adhesive layer can be adhered to the first substrate, the spacer material is also formed on the first substrate and around the optical adhesive layer.

[0068] In an embodiment, the first absorbing layer is a near-infrared absorbing layer, which comprises a copper complex having a near-infrared absorbing function. The copper complex can be formed by a copper compound for providing copper ions and a phosphonic acid as shown in Formula 1 and at least one phosphorus-containing compound as shown in Formula 2 to Formula 4,

[0069]

[0070] wherein R, R1, R2, R3 are each independently a substituted or unsubstituted C1 to C 12 alkyl or a substituted or unsubstituted C6 to C 12 aryl group.

[0071] The copper complex can be a chemical formula Cu 2+ X represents, wherein Cu 2+ is provided by the copper compound, and X is contributed by the phosphonic acid and / or the phosphorus-containing compound.

[0072] Alkyl groups include but are not limited to methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, pentyl, etc., and examples of substituted alkyl groups include but are not limited to haloalkyl, hydroxyalkyl, nitroalkyl, alkoxyalkyl, etc. Aryl groups include but are not limited to phenyl, naphthyl, etc., and examples of substituted aryl groups include but are not limited to haloaryl (e.g. chlorophenyl), nitroaryl, hydroxyaryl, alkoxyaryl, alkylaryl, haloalkylaryl, nitroalkylaryl, hydroxyalkylaryl.

[0073] In an embodiment, the phosphonic acid is butyl phosphonic acid.

[0074] The copper compound mainly serves as a source of copper ions. Any copper compound known to provide copper ions can be used, such as copper salts, for example, copper acetate or a hydrate of copper acetate, and also copper chloride, copper formate, copper stearate, copper benzoate, copper pyrophosphate, copper naphthenate, anhydride or hydrate of copper citrate. In one embodiment, the copper compound used to provide copper ions is copper acetate.

[0075] The phosphorus-containing compound can have a dispersing function to disperse the components in the composition, including the copper complex formed, from each other, to achieve uniform dispersion. As one of the effects of this function, the crystallite size in the phosphorus-containing compound can be 100 nm or less, further more preferably 5 nm to 80 nm, or 20 nm to 60 nm, for example, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100 nm. When the crystallite size is 5 nm or more, sufficient near-infrared absorption properties can be exhibited, and when the crystallite size is 100 nm or less, the number average particle size is small, and the haze of the product produced is low.

[0076] The copper complex of the present application can be produced from a near-infrared absorbing composition including the above-mentioned copper compound, phosphonic acid, and phosphorus-containing compound, and each component interacts and reacts with each other to form the copper complex. In the present application, the proportions of each component can be adjusted as desired. For example, in the near-infrared absorbing composition, the copper compound used to provide copper ions can be 150 parts by weight, for example, 1, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, or 150 parts by weight; the phosphonic acid can be 100 parts by weight, for example, 1, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, or 100 parts by weight; and the total amount of the phosphorus-containing compound can be 1 to 90 parts by weight, for example, 1, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, or 90 parts by weight.

[0077] In one embodiment, the near-infrared absorbing composition includes the phosphorus-containing compounds represented by Formulae 2 to 4 at the same time, and the proportions can be adjusted as desired. For example, the near-infrared absorbing composition can include the phosphorus-containing compound represented by Formula 2 in an amount of 1 to 90 parts by weight, the phosphorus-containing compound represented by Formula 3 in an amount of 1 to 90 parts by weight, and the phosphorus-containing compound represented by Formula 4 in an amount of 1 to 90 parts by weight. In another embodiment, the proportions of the phosphorus-containing compounds represented by Formulae 2 to 4 are 20:20:50.

[0078] In one embodiment, the near-infrared absorbing composition can be in the form of a dispersion liquid, i.e., in addition to the copper compound, the phosphonic acid, and the phosphorus-containing compound, a solvent is further included. In the preparation, the copper compound, the phosphonic acid, and the phosphorus-containing compound can be added to the solvent and mixed. The proportions of these components to the solvent can be 1:5 to 1:1, for example, 1:3, but are not limited thereto.

[0079] The solvent can be a publicly known solvent, and examples thereof include, but are not limited to, water, alcohols, ketones, ethers, esters, aromatic hydrocarbons, halogenated hydrocarbons, dimethylformamide, dimethylacetamide, dimethyl sulfoxide, sulfolane, and the like. Specifically, the alcohols are, for example, methanol, ethanol, propanol, and the like. The esters are, for example, alkyl formates, alkyl acetates, alkyl propionates, alkyl butyrates, alkyl lactates, alkyl alkoxyacetates, alkyl 3-alkoxypropionates, alkyl 2-alkoxypropionates, alkyl 2-alkoxy-2-methylpropionates, alkyl pyruvates, alkyl acetoacetates, alkyl 2-oxobutyrates, and the like. The ethers are, for example, diethylene glycol dimethyl ether, tetrahydrofuran, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, methyl cellosolve acetate, ethyl cellosolve acetate, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, and the like. The ketones are, for example, methyl ethyl ketone, cyclohexanone, cyclopentanone, 2-heptanone, 3-heptanone, and the like. The aromatic hydrocarbons are, for example, toluene, xylene, and the like.

[0080] The mixing is, for example, sufficient stirring at room temperature (e.g., 25°C) for 4 hours or more, 6 hours or more, 8 hours or more, but is not limited thereto.

[0081] In the present application, the near-infrared absorbing composition in the form of a dispersion liquid can be mixed with an optical resin to become a near-infrared absorbing composition in the form of a coating liquid, which is then formed into the first absorbing layer. The ratio of the dispersion liquid to the optical resin can be 5:1 to 1:1 or 3:1 to 1:1, for example, 0.65:0.35, but is not limited thereto. In the case of using the near-infrared absorbing composition in the form of a coating liquid, it is formed on a substrate, dried and cured to form the first absorbing layer.

[0082] The optical resin can be a thermoplastic resin and / or a photocurable resin. In an embodiment, the optical resin is selected from the group consisting of polycarbonate-based, polyester-based, polycycloolefin-based, polyacrylic-based, silicone-based and polyimide-based resins. In another embodiment, the optical resin is a silicone resin. In another embodiment, the optical resin is methyl methacrylate.

[0083] In an embodiment, the near-infrared absorbing composition can be added with other additives, such as a polymerization initiator, for example, a photopolymerization initiator, so that the optical resin can be subjected to a polymerization reaction by light irradiation. The polymerization initiator includes, but is not limited to, azobisisobutyronitrile. In an embodiment, an additive such as a curing agent, for example, a photocuring agent, is added to facilitate a curing process, so that the film can be cured by light irradiation. In an embodiment, a solvent can also be added to facilitate uniform mixing. The solvent used herein can use those known in the art, including but not limited to those mentioned herein.

[0084] In an embodiment, in order to maintain better light transmittance, the first absorbing layer has a haze of 0.4% or less, 0.3% or less, or 0.2% or less, for example, 0.4%, 0.35%, 0.3%, 0.25%, 0.2%, 0.19%, 0.18%, 0.17%, 0.16%, 0.15%, 0.14%, 0.13%, 0.12%, 0.11% or 0.1%.

[0085] The thickness of the first absorbing layer also affects the characteristics of near-infrared absorption. Generally speaking, the thicker the first absorbing layer, the higher the near-infrared cutoff ability, and vice versa. The first absorbing layer of the present application can achieve excellent near-infrared cutoff ability even in a very thin case. Specifically, the thickness of the first absorbing layer is between 25 μm and 150 μm, between 50 μm and 150 μm, or between 100 μm and 150 μm, for example, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 125 μm, 130 μm, 135 μm, 140 μm, 145 μm, 146 μm, 147 μm or 150 μm.

[0086] In one embodiment, the first absorbing layer of the present application has at least one main peak in X-ray photoelectron spectroscopy at a binding energy of 930 to 940 electron volts. In one embodiment, the at least one main peak has a count per second value of 4500 or more, 4600 or more, 4700 or more, 4800 or more, 4900 or more, or 5000 or more.

[0087] In one embodiment, the first absorbing layer of the present application has a maximum transmittance of 0.1% or less, less than 0.1%, 0.05% or less, less than 0.05%, 0.01% or less, less than 0.01%, 0.005% or less, or less than 0.005% for a wavelength range of 930 to 950 nm of incident light (including for 940 nm incident light), for example, 0.1%, 0.09%, 0.08%, 0.07%, 0.06%, 0.05%, 0.04%, 0.03%, 0.02%, 0.01%, 0.009%, 0.0008%, 0.007%, 0.0006%, 0.005%, 0.004%, 0.003%, 0.002%, or 0.001%; and an OD value of 3 or more, more than 3, 3.5 or more, more than 3.5, 4 or more, more than 4, 4.5 or more, or more than 4.5 for a wavelength range of 930 to 950 nm of incident light (including for 940 nm incident light), for example, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9.

[0088] In one embodiment, the first absorbing layer of the present application has a maximum transmittance of 1% or less, or 0.5% or less, for example, 1%, 0.9%, 0.8%, 0.7%, 0.6%, 0.5%, 0.4%, 0.3%, 0.2%, or 0.1%, for a wavelength range of 830 to 1200 nm of incident light; and a minimum transmittance of 80% or more, or 85% or more, for example, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, or 90%, for a wavelength range of 460 to 560 nm of incident light.

[0089] In an embodiment, the first absorption layer has a passband overlapping with a wavelength range of 300 nm to 850 nm, 300 nm to 800 nm, or 350 nm to 750 nm, and a center wavelength of the passband is within a wavelength range of 300 nm to 850 nm, 300 nm to 800 nm, 350 nm to 750 nm, 400 nm to 700 nm, 450 nm to 650 nm, 500 nm to 600 nm, or 500 nm to 550 nm. Herein, the "passband" refers to a section exhibiting a transmittance of 50% or more for incident light within a wavelength range, and the "center wavelength of the passband" refers to an average of two wavelengths of incident light corresponding to a transmittance of 50% for incident light.

[0090] The second absorption layer is used to assist the first absorption layer, so that the lens module with an integrated structure of the present application exhibits better optical performance, for example, further improves the cutoff of near-infrared and ultraviolet. In an embodiment, the second absorption layer includes a near-infrared absorbing dye and / or an ultraviolet absorbing dye. In an embodiment, the second absorption layer includes a plurality of sub-layers, at least one of which includes a near-infrared absorbing dye layer and at least one of which includes an ultraviolet absorbing dye layer. In the case of a second absorption layer including a plurality of sub-layers, the arrangement order of the near-infrared absorbing dye layer and the ultraviolet absorbing dye layer is not limited, for example, the near-infrared absorbing dye layer can be disposed close to the light entrance side and the ultraviolet absorbing dye layer can be disposed close to the light sensitive side; or the ultraviolet absorbing dye layer can be disposed close to the light entrance side and the near-infrared absorbing dye layer can be disposed close to the light sensitive side.

[0091] In an embodiment, the thickness of the second absorption layer is 0.5 μm to 10 μm, for example, 0.5 μm, 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm or 10 μm. In the case of a second absorption layer being a multi-layer structure, the thickness of each layer is 0.5 μm to 10 μm, for example, 0.5 μm, 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm or 10 μm.

[0092] In an embodiment, the second absorption layer can include a transparent resin material, including but not limited to epoxy resin, polyurethane, polyacrylate, polyolefin, polycarbonate, polycycloolefin, and polyvinyl butyral, which can be selected as the substrate of the second absorption layer. In an embodiment, the average transmittance or minimum transmittance of the transparent resin material to visible light (e.g., 460 nm to 560 nm wavelength) is 85% or more, and further 90% or more, including but not limited to 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94% or 95%.

[0093] In one embodiment, the near-infrared absorbing dye, such as azo-based compounds, diimmonium-based compounds, dithiol metal complexes, squarylium-based compounds, cyanine-based compounds, and phthalocyanine-based compounds, can have a maximum absorption wavelength adjusted to be between 650 and 1100 nm, or more specifically between 650 and 750 nm. The ultraviolet absorbing dye, such as azomethine-based compounds, indole-based compounds, ketone-based compounds, benzimidazole-based compounds, and triazine-based compounds.

[0094] The first substrate and the second substrate provide support for the first absorbing layer, the second absorbing layer, and the optical bonding layer, and can also be used to assist the first absorbing layer to exhibit better optical performance, such as further improving the cutoff of near-infrared light and ultraviolet light. In one embodiment, the first substrate and the second substrate can be glass, specifically, transparent glass (such as AF glass) or blue glass, which can exhibit a near-infrared light cutoff effect when blue glass is selected. The blue glass is, for example, phosphate glass, such as blue glass formed from materials such as metaphosphate compounds, carbonate compounds, metal oxides, and metal fluorides, wherein the metaphosphate compounds include but are not limited to aluminum metaphosphate, magnesium metaphosphate, lithium metaphosphate, zinc metaphosphate, and calcium metaphosphate, the carbonate compounds include but are not limited to calcium carbonate, barium carbonate, and strontium carbonate, the metal oxides include but are not limited to copper oxide, aluminum oxide, zinc oxide, and magnesium oxide, and the metal fluorides include but are not limited to aluminum fluoride, magnesium fluoride, calcium fluoride, strontium fluoride, barium fluoride, and zinc fluoride. The glass raw materials can be uniformly mixed and then placed in a crucible, and the crucible is then placed in an atmospheric or reducing atmosphere furnace, and the temperature is controlled to be between 700°C and 1000°C to obtain a homogenized glass.

[0095] In one embodiment, the first substrate and / or the second substrate is blue glass, wherein the molar ratio of phosphorus / (aluminum + lanthanum + niobium + yttrium) is 1.5 to 16, and the molar ratio of fluorine / (fluorine + oxygen) is 0.01 to 0.2. In one embodiment, the blue glass contains 35 to 55 mol% of phosphorus, 3.5 to 15 mol% of aluminum, 15 to 25 mol% of alkali metal elements, 10 to 35 mol% of alkaline earth metal and divalent metal elements, 10 to 21 mol% of copper, and 0 to 7 mol% of lanthanum + niobium + yttrium, and wherein the molar ratio of copper / phosphorus is 0.25 to 0.7, and the molar ratio of fluorine / (fluorine + oxygen) is 0.01 to 0.2.

[0096] In an embodiment, the first substrate and / or the second substrate has a thickness of between 200 pm and 500 pm, between 200 pm and 400 pm, or between 200 pm and 300 pm, for example 200 pm, 225 pm, 250 pm, 275 pm, 300 pm, 325 pm, 350 pm, 375 pm, 400 pm, 425 pm, 450 pm, 475 pm, or 500 pm.

[0097] The first lens and the second lens can be those materials, compositions, and shapes known in the art, and are not limited in the present disclosure, as long as they can be integrated into the lens module with an integrated structure of the present disclosure. In an embodiment, the material of the first lens and the second lens can be glass, polycarbonate, polyacrylate, or the like.

[0098] The optical bonding layer can be those materials and compositions known in the art, and are not limited in the present disclosure, as long as they can be used to bond the first or second substrate and the first or second absorbing layer thereon. In an embodiment, the optical bonding layer can be an optical tape or an optical glue. In an embodiment, the material of the optical bonding layer has a refractive index matching that of the first or second substrate bonded thereto, so as to reduce the loss and refraction of incident light at the interface.

[0099] The spacing material can be those materials and compositions known in the art, and are not limited in the present disclosure. In addition to serving as a boundary of the optical bonding layer, the spacing material can also serve as a cutting mark in the process of mass producing the lens module of the present disclosure, for example, coating, disposing, and cutting on a large-area substrate (e.g., a wafer) to simultaneously produce lens modules.

[0100] In an embodiment, the lens module of the present disclosure has a haze of 0.5% or less, 0.4% or less, or 0.3% or less, for example 0.5%, 0.45%, 0.4%, 0.35%, 0.3%, 0.25%, 0.2%, 0.19%, 0.18%, 0.17%, 0.16%, 0.15%, 0.14%, 0.13%, 0.12%, 0.11%, or 0.1%.

[0101] In an embodiment, the maximum transmittance of the lens module of the present application to the wavelength range of 930 nm to 950 nm (including 940 nm) is 0.01% or less, less than 0.01%, 0.005% or less, or less than 0.005%, for example, 0.01%, 0.009%, 0.008%, 0.007%, 0.006%, 0.005%, 0.004%, 0.003%, 0.002%, 0.001%; on the other hand, the OD value to the wavelength range of 930 nm to 950 nm (including 940 nm) is 4 or more, more than 4, 4.5 or more, more than 4.5, 4.8 or more, or more than 4.8, for example, 4, 4.01, 4.1, 4.2, 4.3, 4.4, 4.5, 4.51, 4.6, 4.7, 4.8, 4.81, 4.9.

[0102] In an embodiment, the maximum transmittance of the lens module of the present application to the wavelength range of 830 nm to 1200 nm is 1% or less or 0.5% or less, for example, 1%, 0.9%, 0.8%, 0.7%, 0.6%, 0.5%, 0.4%, 0.3%, 0.2%, or 0.1%; and the minimum transmittance to the wavelength range of 460 nm to 560 nm is 80% or more or 85% or more, for example, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, or 90%.

[0103] In an embodiment, the lens module of the present application has a passband overlapping the wavelength range of 300 nm to 850 nm, 300 nm to 800 nm, or 350 nm to 750 nm, and the center wavelength of the passband is within the wavelength range of 300 nm to 850 nm, 300 nm to 800 nm, 350 nm to 750 nm, 400 nm to 700 nm, 450 nm to 650 nm, 500 nm to 600 nm, or 500 nm to 550 nm.

[0104] In an embodiment, when the incident light irradiates the lens module of the present application at an incident angle of 0 degree and 30 degrees, respectively, the center wavelength of the passband is shifted, and the shift amplitude is 1.4 nm or less, for example, 1.4 nm, 1.3 nm, 1.2 nm, or 1.1 nm. In an embodiment, when the incident light irradiates the lens module at an incident angle of 0 degree and 35 degrees, respectively, the center wavelength of the passband is shifted, and the shift amplitude is 1.9 nm or less, for example, 1.9 nm, 1.8 nm, or 1.7 nm.

[0105] The present application will be described in further detail with reference to the following specific examples, however, these specific examples are by no means intended to limit the scope of the present application.

[0106] Example

[0107] The first substrate is a large-area blue glass, and a first absorption layer is formed on the first substrate, and then a second absorption layer is formed. Then, a spacer material is arranged on the second absorption layer to form a spacer region, and then optical glue is filled in the spacer region, and finally the large-area blue glass as the first substrate is covered. Resin layers are formed on the outer sides of the first substrate and the second substrate, and the resin layers are processed to form first and second lenses with specific shapes. Finally, a cutting step is performed to obtain a lens module with an integrated structure.

[0108] Preparation Example

[0109] First absorption layer

[0110] 150 parts by weight of copper acetate and 15000 parts by weight of ethanol were mixed to form a first mixed solution, and 20 parts by weight of a phosphorus-containing compound shown in formula 2 (plysurf A242G, purchased from Japan First Industrial Co., Ltd.), 20 parts by weight of a phosphorus-containing compound shown in formula 3 (plysurf W542C, purchased from Japan First Industrial Co., Ltd.), and 50 parts by weight of a phosphorus-containing compound shown in formula 4 (plysurf A285C, purchased from Japan First Industrial Co., Ltd.) and 1500 parts by weight of ethanol were mixed to form a second mixed solution. The first mixed solution and the second mixed solution were mixed and stirred at room temperature for 1 hour, and then 100 parts by weight of butyl phosphonic acid was added and reacted at room temperature for 3 hours. Then, it was placed in an oven at 85°C for 12 hours to obtain a powder. The powder was mixed with xylene at a weight ratio of 1:3 to form a dispersion liquid, and then the dispersion liquid was mixed with methyl methacrylate (MMA) at a weight ratio of 0.65:0.35 to form a coating liquid, which was then coated on a substrate and baked at a temperature of 70°C for 30 minutes to obtain a first absorption layer.

[0111] The first absorption layer was subjected to X-ray photoelectron (ESCA / XPS) analysis, and the X-ray photoelectron spectrum is shown in Figure 3 It can be observed that there is a characteristic peak related to copper complex (Cu(PO x ) y , CuO, Cu2O, Cu(OH)2) at a binding energy of 930eV to 940eV. In addition, the peak appearing at a binding energy of 940eV or more is a satellite peak.

[0112] Second absorption layer

[0113] 0.02 g of a squaric acid compound and anthocyanin compound, which are used as near-infrared absorbing dyes, were added to 5 g of epoxy resin, coated onto a substrate, and baked at 70°C for 30 minutes to obtain a sublayer containing near-infrared absorbing dyes. Separately, 0.02 g of a triazine compound, which is used as an ultraviolet absorbing dye, was added to 5 g of epoxy resin, coated onto the sublayer containing near-infrared absorbing dyes, and baked at 70°C for 30 minutes to obtain a sublayer containing ultraviolet absorbing dyes. This double layer serves as the second absorption layer.

[0114] Comparison of transmittance curves

[0115] First, the second absorption layer is prepared according to the method described in Preparation Example 1 above. A first mixture is coated onto blue glass to form a sublayer containing near-infrared absorbing dye, and then the second mixture is coated onto it to form a sublayer containing ultraviolet absorbing dye, thereby obtaining a bilayer structure of blue glass + second absorption layer (containing two sublayers). Alternatively, a trilayer structure of blue glass + first absorption layer + second absorption layer is prepared according to the method for preparing the bilayer structure, but the difference is that the coating liquid is first coated onto the blue glass to form the first absorption layer before preparing the second absorption layer. The transmittance curves of the blue glass, the bilayer structure, and the trilayer structure are shown below. Figure 4 As shown, incorporating the first absorption layer can significantly improve the near-infrared cutoff effect while maintaining high transmittance in the visible light range.

[0116] Example 1

[0117] Lens module configuration as follows Figure 1 As shown, it includes a first lens 21; a second lens 22; a first substrate 11 (blue glass) and a second substrate 12 (blue glass); an optical adhesive layer 31 (optical tape); a first absorption layer 13 (prepared according to the method described in Preparation Example 1, with a thickness of 145.44 μm); and a second absorption layer 14 (prepared according to the method described in Preparation Example 1, with a thickness of 5 μm).

[0118] Examples 2 to 4 and Comparative Example 1

[0119] Lens modules were prepared according to the method of Example 1, but the thickness of the first absorption layer was changed to 146.22 μm, 147.44 μm, and 146.63 μm, as Examples 2 to 4. Another lens module was prepared according to the method of Example 1, but the thickness of the first absorption layer was changed to 165.11 μm, as Comparative Example 1. The transmittance curves of Examples 1 to 4 and Comparative Example 1 are shown below. Figures 5 to 8 As shown.

[0120] According to these results, the lens module of the present application has very high cutoff for the incident light wavelength of 930 nm to 950 nm, even reaching an OD value of 4.5 or more. To further show the OD value of the lens module of the present application for the incident light wavelength of 930 nm to 950 nm, the transmittance curve and data are made into a graph of the OD value of the lens module of the present application for the incident light wavelength of 930 nm to 950 nm, as shown in FIG. 4, which is a graph of the OD value of the lens module of the present application for the incident light wavelength of 930 nm to 950 nm. Figure 9 On the other hand, the lens module of the present application has excellent transmittance for visible light, has a passband overlapping the wavelength range of 350 nm to 850 nm, and has a center wavelength of the passband in the wavelength range of 350 nm to 850 nm.

[0121] According to the transmittance curve of the lens module of the present application, the transmittance curve of the lens module of the present application is shown in FIG. 3, which is a transmittance curve of the lens module of the present application. Figure 10 The transmittance curve of the lens module of the present application is shown in FIG. 2, which is a transmittance curve of the lens module of the present application. The transmittance curve of the lens module of the present application is shown in FIG. 1, which is a transmittance curve of the lens module of the present application. Figure 11 The transmittance curve of the lens module of the present application is shown in FIG. 2, which is a transmittance curve of the lens module of the present application. The transmittance curve of the lens module of the present application is shown in FIG. 1, which is a transmittance curve of the lens module of the present application.

[0122] The above embodiments and specific examples are not intended to limit the present application, and the listed technical features or schemes can be combined with each other, and the present application can be implemented or applied by other different embodiments, and the details described herein can be changed or modified according to different viewpoints and applications without departing from the present application.

[0123] Of course, the present application can have other various embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present application without departing from the spirit and essence of the present application, but these corresponding changes and modifications should all fall within the protection scope of the claims of the present application.

Claims

1. A lens module with an integrated architecture, characterized by, The first lens and the second lens are respectively located at the outermost side of the lens module. The first substrate and the second substrate are respectively arranged on the first lens and the second lens. The optical adhesive layer is arranged on the first substrate or the second substrate and between the first substrate and the second substrate. The first absorbing layer and the second absorbing layer are located between the optical adhesive layer and the first substrate or the second substrate. The first absorbing layer comprises: A copper complex formed by a copper compound for providing copper ions and a phosphonic acid as shown in Formula 1 and at least one phosphorus-containing compound as shown in Formula 2 to Formula 4. The OD value of the first absorbing layer to the incident light wavelength of 930 nm to 950 nm is greater than 4. The second absorbing layer comprises a near-infrared absorbing dye and an ultraviolet absorbing dye. wherein R, R1, R2, R3 are each independently substituted or unsubstituted C1to C 12 alkyl or substituted or unsubstituted C6to C 12 aryl, The first absorbing layer has a haze of 0.4% or less. The X-ray photoelectron spectrum of the first absorbing layer has at least one main peak at a binding energy of 930 electron volts to 940 electron volts.

2. The lens module according to claim 1, wherein, said substituted or unsubstituted C1to C 12 alkyl is selected from the group consisting of methyl, ethyl, n-propyl, i-propyl, n-butyl, s-butyl, i-butyl, t-butyl; said substituted or unsubstituted C6to C 12 aryl is selected from the group consisting of phenyl, naphthyl, chlorophenyl.

3. The lens module according to claim 1, wherein, The count per second value of the at least one main peak is 4500 or more.

4. The lens module according to claim 1, wherein, The thickness of the first absorbing layer is 25 μm to 150 μm.

5. The lens module according to claim 4, wherein, The minimum transmittance of the first absorbing layer to the incident light wavelength range of 460 nm to 560 nm is 80% or more.

6. The lens module according to claim 1, wherein, The minimum transmittance of the first absorbing layer to the incident light wavelength range of 460 nm to 560 nm is 85% or more.

7. The lens module according to claim 1, wherein, The optical adhesive layer is an optical adhesive tape or an optical adhesive. 8.The lens module according to claim 1, wherein, The materials of the first substrate and the second substrate are glass. 9.The lens module according to claim 1, wherein, The materials of the first lens and the second lens are selected from glass, polycarbonates, and polyacrylates. 10.The lens module according to claim 1, wherein, The second absorbing layer comprises at least one sublayer comprising a near-infrared absorbing dye and at least one sublayer comprising an ultraviolet absorbing dye. 11.The lens module according to claim 1, wherein, The near-infrared absorbing dye is at least one selected from the group consisting of azo-based compounds, diimmonium-based compounds, dithiol metal complexes, squarine-based compounds, cyanine-based compounds, and phthalocyanine-based compounds. 12.The lens module according to claim 1, wherein, The ultraviolet absorbing dye is at least one selected from the group consisting of azomethine-based compounds, indole-based compounds, ketone-based compounds, benzimidazole-based compounds, and triazine-based compounds.

13. The lens module according to claim 12, wherein, It further comprises a spacer material arranged on the first substrate or the second substrate and surrounding the optical adhesive layer.

14. The lens module according to claim 12, wherein, ​ 15. The lens module according to claim 1, wherein, ​

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