阅读说明：本技术 滤光片及其制备方法和摄像头模组 (Optical filter, preparation method thereof and camera module ) 是由 叶晶 黄永恒 段盼光 于 2019-04-28 设计创作，主要内容包括：本发明涉及一种滤光片及其制备方法和摄像头模组。一种滤光片,包括玻璃基板和层叠在玻璃基板上的镀膜层,按照质量份数计,制备镀膜层的原料包括10份～12份的二氧化钛和1份～3份的超分子化合物,其中,超分子化合物为磷钼酸苯并咪唑基苯酚,超分子化合物的分子式为(C<Sub>13</Sub>H<Sub>11</Sub>N<Sub>2</Sub>O)<Sub>3</Sub>(PMo<Sub>12</Sub>O<Sub>40</Sub>)·C<Sub>13</Sub>H<Sub>10</Sub>N<Sub>2</Sub>O。上述滤光片中的镀膜层的原料包括二氧化钛和超分子化合物,二者配比合理,在滤光片表层加入超分子化合物,使得超分子化合物的有机非极性端都朝外排列,减小滤光片表面对微米级细小尘屑的吸附力,而使滤光片外表面易清洁除尘。(The invention relates to an optical filter, a preparation method thereof and a camera module. The optical filter comprises a glass substrate and a coating layer laminated on the glass substrate, wherein the coating layer is prepared from 10-12 parts of titanium dioxide and 1-3 parts of a supramolecular compound in parts by mass, wherein the supramolecular compound is benzimidazolyl phenol phosphomolybdate, and the molecular formula of the supramolecular compound is (C) 13 H 11 N 2 O) 3 (PMo 12 O 40 )·C 13 H 10 N 2 And O. The raw material of the film coating layer in the optical filter comprises titanium dioxideAnd the supermolecule compound is added on the surface layer of the optical filter, so that the organic non-polar ends of the supermolecule compound are arranged outwards, the adsorption force of the surface of the optical filter on micron-sized fine dust is reduced, and the outer surface of the optical filter is easy to clean and remove dust.)

1. The optical filter is characterized by comprising a glass substrate and a coating layer laminated on the glass substrate, wherein the coating layer is prepared from the following raw materials in parts by mass:

10-12 parts of titanium dioxide;

1-3 parts of supramolecular compound;

wherein the supramolecular compound is benzimidazolylphenol phosphomolybdate, and the molecular formula of the supramolecular compound is (C)₁₃H₁₁N₂O)₃(PMo₁₂O₄₀)·C₁₃H₁₀N₂O。

2. The optical filter according to claim 1, wherein the mass ratio of the titanium dioxide to the supramolecular compound is 10:1 to 4: 1.

3. The filter according to claim 1, wherein the titanium dioxide is nano titanium dioxide.

4. The filter according to claim 1, wherein the glass substrate is a fluorophosphate glass substrate.

5. The filter of claim 1, wherein the thickness of the coating layer is 2.2 μm to 2.8 μm.

6. The preparation method of the optical filter is characterized by comprising the following steps of:

forming a coating layer on a glass substrate to obtain the optical filter, wherein the raw materials for preparing the coating layer comprise 10-12 parts of titanium dioxide and 1-3 parts of supramolecular compound by mass, and the supramolecular compound is benzimidazolyl phenol phosphomolybdate.

7. The method for manufacturing an optical filter according to claim 6, wherein the method for forming the coating layer on the glass substrate is evaporation.

8. The method according to claim 7, wherein the evaporation temperature is 230 ℃ to 240 ℃.

9. The method of claim 7, wherein the evaporation is performed in a vacuum of 2.0 x 10^-2Pa～3.0×10^-2Pa。

10. A camera module, comprising the optical filter of any one of claims 1 to 5 or the optical filter manufactured by the method of any one of claims 6 to 9.

Technical Field

The invention relates to the technical field of optical filters, in particular to an optical filter, a preparation method thereof and a camera module.

Background

The optical filter is an important optical component in the camera module, and the situation that tiny foreign matters are adhered to the surface of the optical filter often occurs in the carrying process of the camera module, wherein the tiny foreign matters come from scraps, dust, foreign matters and the like generated by equipment in the assembling process. Therefore, in the process of carrying and assembling the optical filter by equipment, the surface of the optical filter is subjected to plasma air blowing dust removal treatment, but the adsorption force between the optical filter and micron-sized fine scraps is large, so that after the cleaning process, the fine dust on the surface of the optical filter still has more residues, and the imaging quality of the camera module is directly influenced.

Disclosure of Invention

In view of this, it is necessary to provide an optical filter having a small adsorption force to fine dusts of the order of micrometers.

In addition, a preparation method of the optical filter and a camera module are also provided.

The optical filter comprises a glass substrate and a coating layer laminated on the glass substrate, and the coating layer is prepared from the following raw materials in parts by mass:

10-12 parts of titanium dioxide;

1-3 parts of supramolecular compound;

wherein the supramolecular compound is benzimidazolylphenol phosphomolybdate, and the molecular formula of the supramolecular compound is (C)₁₃H₁₁N₂O)₃(PMo₁₂O₄₀)·C₁₃H₁₀N₂O。

The raw materials of the coating layer in the optical filter comprise titanium dioxide and a supramolecular compound, the titanium dioxide and the supramolecular compound are reasonably mixed, and the supramolecular compound is added on the surface layer of the optical filter, so that the organic nonpolar ends of the supramolecular compound are arranged outwards, the adsorption force of the surface of the optical filter on micron-sized fine dust is reduced, and the outer surface of the optical filter is easy to clean and remove dust.

In one embodiment, the mass ratio of the titanium dioxide to the supramolecular compound is 10: 1-4: 1, so that the optical effect of the coating layer is better.

In one embodiment, the titanium dioxide is nano titanium dioxide. The nanometer titanium dioxide has small particle size and high activity, and can reflect and scatter ultraviolet rays and absorb ultraviolet rays, so that the optical filter has stronger ultraviolet ray blocking capacity.

In one embodiment, the glass substrate is a fluorophosphate glass substrate, so that the optical filter has the characteristics of low refractive index and low dispersion, and has a certain absorption effect on infrared rays.

In one embodiment, the thickness of the coating layer is 2.2-2.8 μm.

A preparation method of an optical filter comprises the following steps:

forming a coating layer on a glass substrate to obtain the optical filter, wherein the raw materials for preparing the coating layer comprise 10-12 parts of titanium dioxide and 1-3 parts of supramolecular compound by mass, and the supramolecular compound is benzimidazolyl phenol phosphomolybdate. The preparation method of the optical filter is simple and feasible, and is suitable for industrial production.

In one embodiment, the method for forming the coating layer on the glass substrate is evaporation.

In one embodiment, the temperature of evaporation is 230-240 ℃.

In one embodiment, the vacuum degree of the evaporation is 2.0 × 10^-2Pa～3.0×10^-2Pa。

A camera module comprises the optical filter or the optical filter manufactured by the preparation method of the optical filter.

Detailed Description

The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The optical filter comprises a glass substrate and a coating layer laminated on the glass substrate, wherein the coating layer is prepared from the following raw materials in parts by mass:

10-12 parts of titanium dioxide;

1-3 parts of supramolecular compound.

Wherein the glass substrate has low refractive index and low dispersion characteristics. Specifically, the glass substrate is a fluorophosphate glass substrate. The fluorophosphate glass has special dispersion, has a certain absorption effect on infrared rays, and can eliminate secondary spectrum. Further, the size of the glass substrate was 4.5mm × 8mm × 0.3 mm.

Specifically, the thickness of the coating layer is 2.2-2.8 μm.

Titanium dioxide has a good ultraviolet screening effect, and the strong ultraviolet resistance of titanium dioxide is due to high refractivity and high optical activity. When the particle size is larger, the ultraviolet ray is mainly blocked by reflection and scattering, and the ultraviolet ray in the medium wave region and the long wave region is effective.

Specifically, the titanium dioxide is nano titanium dioxide. The nanometer titanium dioxide has small particle size and high activity, and can reflect and scatter ultraviolet rays and absorb ultraviolet rays, so that the optical filter has stronger ultraviolet ray blocking capacity.

The term supramolecules was proposed as early as the mid-30 of the 20 th century, and the concept and terminology of supramolecular chemistry was proposed in 1973. In 1987, nobel prize winner of chemistry, french scientist j.m. lehn, first proposed the concept of "supramolecular chemistry", who pointed out: "the field of molecular chemistry exists based on covalent bonds, and supramolecular chemistry exists based on molecular assemblies and intermolecular bonds. Supramolecular chemistry is the chemistry of molecular aggregates formed based on non-covalent intermolecular interactions, in other words the intermolecular interactions are the core of supramolecular chemistry. In supramolecular chemistry, different types of intermolecular interactions are distinguishable, and can be classified according to their different degrees of strength, orientation, and dependence on distance and angle: coordination bonds, hydrogen bonds, pi-pi stacking interactions, electrostatic interactions, hydrophobic interactions, and the like of metal ions. Their intensity distribution ranges from weak to moderate in pi-pi stacking and hydrogen bonding to strong or very strong in metal ion coordination bonds, and these forces become the fundamental method for driving the self-assembly of supramolecules. One can assemble components or building blocks with specific structures and functions into new supramolecular compounds in a certain way, using intermolecular interaction forces as tools, according to the principle of supramolecular self-assembly. These novel compounds not only exhibit unique properties not possessed by a single molecule, but also greatly increase the number and variety of compounds. If one can control the supramolecular self-assembly process very well, compounds with specific structures and functions can be obtained more simply and reliably according to the intended target.

Supramolecules generally refer to complex, organized aggregates of two or more molecules held together by intermolecular interactions and which retain some integrity to give well-defined microstructure and macroscopic properties. Specifically, the supramolecular compound is benzimidazolylphenol phosphomolybdate. More specifically, the supramolecular compound has the formula (C)₁₃H₁₁N₂O)₃(PMo₁₂O₄₀)·C₁₃H₁₀N₂O。

Further, the mass ratio of the titanium dioxide to the supramolecular compound is 10: 1-4: 1.

The optical filter at least has the following advantages:

1) the raw materials of the coating layer in the optical filter comprise titanium dioxide and a supramolecular compound, the titanium dioxide and the supramolecular compound are reasonably mixed, and the supramolecular compound is added on the surface layer of the optical filter, so that the organic nonpolar ends of the supramolecular compound are arranged outwards, the adsorption force of the surface of the optical filter on micron-sized fine dust is reduced, and the outer surface of the optical filter is easy to clean and remove dust.

2) The supermolecule compound and the titanium dioxide in the raw materials of the coating layer are both in a nanometer level, and the supermolecule compound and the titanium dioxide can achieve a synergistic effect in the aspect of molecular space arrangement, so that molecules on the surface of the coating layer can be more orderly and flatly spread, the outer surface of the optical filter is smoother, and fine scraps are not easy to adhere and accumulate.

3) The supramolecular compound in the optical filter is uniformly dispersed on the surface layer of the optical filter, and the molecular chain of the supramolecular compound contains metal oxide, so that the optical filter has certain corrosion resistance and antibacterial performance and can enhance the service durability of the optical filter; meanwhile, the supermolecule compound has an electrophilic end and a nucleophilic end, is not easy to generate electrostatic action, and is not easy to generate electrostatic attraction on micron-sized fine scraps, so that the micron-sized dust scraps are difficult to adsorb.

A method for manufacturing an optical filter according to an embodiment is one of the methods for manufacturing the optical filter described above, and the optical filter includes the following steps:

step S100: and forming a coating layer on the glass substrate to obtain the optical filter.

Wherein, the raw materials for preparing the coating layer comprise 10 to 12 parts of titanium dioxide and 1 to 3 parts of supramolecular compound by weight.

Specifically, the titanium dioxide is nano titanium dioxide.

Specifically, the supramolecular compound is benzimidazolylphenol phosphomolybdate. More specifically, the supramolecular compound has the formula (C)₁₃H₁₁N₂O)₃(PMo₁₂O₄₀)·C₁₃H₁₀N₂O。

Specifically, the thickness of the coating layer is 2.2-2.8 μm. Further, the thickness of the coating layer is monitored by a quartz crystal oscillator method so as to control the thickness of the coating layer.

Further, a method of forming a plating layer on a glass substrate is vapor deposition. Further, the temperature of evaporation is 230-240 ℃; the degree of vacuum of the vapor deposition was 2.0X 10 ^-2Pa～3.0×10^-2Pa; the atmosphere of the vapor deposition is oxygenAnd (4) a gas atmosphere.

The method of forming the plating layer on the glass substrate is not limited to the vapor deposition, and may be magnetron sputtering, coating, or the like as long as the plating layer can be formed.

The preparation method of the optical filter is simple and feasible, and is suitable for industrial production.

A camera module comprises the optical filter or the optical filter manufactured by the preparation method of the optical filter. The camera module can be used for preparing electronic products such as mobile phones, computers, automobiles and the like.

The following are specific examples: