阅读说明：本技术 一种减少镜头反射的方法及镜头组件 (Method for reducing lens reflection and lens assembly ) 是由 陈喜文 赵刚科 于 2020-11-24 设计创作，主要内容包括：本发明公开了一种减少镜头反射的方法及镜头组件,镜头组件包括：镜头架,所述镜头架上设有镜头；减反射膜,所述减反射膜设置于所述镜头架的表面,并围绕所述镜头圆周设置,用于减少所述镜头架的表面的光反射。所述减反射膜为5～12层中的任一层数,由SiO_2膜层和TiO_2膜层交替层叠组成。本发明实施例提供的减少镜头反射的方法及镜头组件,通过在镜头架的表面镀减反射膜,用于减少镜头架的表面的光反射,减少镜头架的内腔中的光反射,从而降低光反射对成像的影响,提高成像质量。(The invention discloses a method for reducing reflection of a lens and a lens assembly, wherein the lens assembly comprises: the lens frame is provided with a lens; and the antireflection film is arranged on the surface of the lens frame and surrounds the circumference of the lens and is used for reducing light reflection on the surface of the lens frame. The antireflection film comprises 5-12 layers of SiO 2 Film layer and TiO 2 The film layers are alternately laminated. The method for reducing the reflection of the lens and the lens assembly provided by the embodiment of the invention are used for reducing the light reflection on the surface of the lens frame and reducing the light reflection in the inner cavity of the lens frame by plating the antireflection film on the surface of the lens frame, thereby reducing the influence of the light reflection on imaging,and the imaging quality is improved.)

1. A lens assembly, comprising:

the lens frame is provided with a lens;

the antireflection film is plated on the surface of the lens frame and arranged around the circumference of the lens, and is used for reducing light reflection on the surface of the lens frame.

2. The lens assembly of claim 1, wherein the antireflection film comprises 5-12 layers of SiO₂Film layer and TiO₂The film layers are alternately laminated.

3. The lens assembly of claim 2, wherein the antireflection film is 12 layers, in turn made of TiO₂Film layer and SiO₂The film layers are alternately laminated, and the film thicknesses are respectively 99.9nm, 149.81nm, 85.98nm, 139.68nm, 84.13nm, 137.89nm, 84.05nm, 138.7nm, 85.23nm, 143.94nm, 84.85nm and 69.46 nm.

4. The lens assembly of claim 2, wherein the antireflection film is 9 layers, in turn made of SiO₂Film layer and TiO₂The film layers are alternately laminated, and the film thicknesses are 163.28nm, 99.9nm, 149.86nm, 87.15nm, 142.46nm, 86.88nm, 145.98nm, 85.85nm and 69.97nm respectively.

5. The lens assembly of claim 2, wherein the antireflection film is 5 layers, in turn made of SiO₂Film layer and TiO₂The film layers are alternately laminated, and the film thicknesses are 775.04nm, 102.79nm, 159.6nm, 89.3nm and 72.33nm respectively.

6. A method for reducing reflections from a lens, comprising:

and plating an antireflection film on the surface of the lens frame by using a vacuum coating machine and an ion source assisted cold plating method, wherein the antireflection film is arranged around the circumference of the lens and is used for reducing light reflection on the surface of the lens frame.

7. The method of claim 1, wherein the step of coating an anti-reflective coating on the surface of the lens holder by using a vacuum coater and using an ion source to assist cold plating, the anti-reflective coating being disposed around the circumference of the lens for reducing light reflection on the surface of the lens holder, comprises:

providing a vacuum coating machine, putting the lens frame into a coating chamber, and taking Si and Ti as target materials;

vacuumizing the coating chamber;

keeping the film coating chamber in a preset temperature range without damaging the lens frame, and rotating the lens frame;

pumping oxygen to the vacuum chamber;

and starting the ion source, the film thickness controller and the electron gun for evaporation, and forming an antireflection film on the surface of the lens frame.

8. The method of reducing lens reflections according to claim 7, further comprising:

and after the evaporation is finished, cleaning the lens frame on an ultrasonic assembly line.

9. The method of reducing lens reflections according to claim 7, further comprising:

the preset temperature range is a room temperature range.

10. The method of any one of claims 6 to 9, wherein the antireflection film comprises 5 to 12 layers of SiO₂Film layer and TiO₂The film layers are alternately laminated.

Technical Field

The invention belongs to the technical field of camera lens assemblies, and particularly relates to a method for reducing lens reflection and a lens assembly.

Background

When the camera is used for shooting, after light enters the camera lens assembly, a part of light enters the lens on the lens frame to transmit light information, the other part of light illuminates on the lens frame, complex reflection can occur in the cavity of the lens frame, and finally the light enters the lens to form secondary light information transmission, so that actual imaging can be interfered, and the formed image is distorted.

Disclosure of Invention

The present invention provides a method for reducing reflection of a lens and a lens assembly to solve the above-mentioned problems.

In order to achieve the purpose, the invention adopts the following technical scheme:

in a first aspect, the present invention provides a lens assembly comprising:

the lens frame is provided with a lens;

the antireflection film is plated on the surface of the lens frame and arranged around the circumference of the lens, and is used for reducing light reflection on the surface of the lens frame.

As an optional technical scheme of the invention, the antireflection film comprises any one of 5-12 layers and is made of SiO₂Film layer and TiO₂The film layers are alternately laminated.

As an optional technical scheme of the invention, the antireflection film is 12 layers which are sequentially formed by TiO₂Film layer and SiO₂The film layers are alternately laminated, and the film thicknesses are respectively 99.9nm, 149.81nm, 85.98nm, 139.68nm, 84.13nm, 137.89nm, 84.05nm, 138.7nm, 85.23nm, 143.94nm, 84.85nm and 69.46 nm.

As an optional technical scheme of the invention, the antireflection film is 9 layers which are sequentially made of SiO₂Film layer and TiO₂The film layers are alternately laminated, and the film thicknesses are 163.28nm, 99.9nm, 149.86nm, 87.15nm, 142.46nm, 86.88nm, 145.98nm, 85.85nm and 69.97nm respectively.

As an optional technical scheme of the invention, the antireflection film is 5 layers which are sequentially made of SiO₂Film layer and TiO₂The film layers are alternately laminated, and the film thicknesses are 775.04nm, 102.79nm, 159.6nm, 89.3nm and 72.33nm respectively.

In a second aspect, the present invention further provides a method for reducing reflection of a lens, including:

and plating an antireflection film on the surface of the lens frame by using a vacuum coating machine and an ion source assisted cold plating method, wherein the antireflection film is arranged around the circumference of the lens and is used for reducing light reflection on the surface of the lens frame.

As an optional technical solution of the present invention, the plating of the antireflection film on the surface of the lens holder by using the vacuum coating machine and the ion source assisted cold plating method, the antireflection film being disposed around the circumference of the lens and used for reducing light reflection on the surface of the lens holder, specifically includes:

providing a vacuum coating machine, putting the lens frame into a coating chamber, and taking Si and Ti as target materials;

vacuumizing the coating chamber;

keeping the film coating chamber in a preset temperature range without damaging the lens frame, and rotating the lens frame;

pumping oxygen to the vacuum chamber;

and starting the ion source, the film thickness controller and the electron gun for evaporation, and forming an antireflection film on the surface of the lens frame.

As an optional technical solution of the present invention, the method for reducing reflection of a lens further includes:

and after the evaporation is finished, cleaning the lens frame on an ultrasonic assembly line.

As an optional technical solution of the present invention, the method for reducing reflection of a lens further includes:

the preset temperature range is a room temperature range.

As an optional technical scheme of the invention, the antireflection film comprises any one of 5-12 layers and is made of SiO₂Film layer and TiO₂The film layers are alternately laminated.

Compared with the prior art, the embodiment of the invention has the following beneficial effects:

according to the method for reducing the reflection of the lens and the lens assembly, the antireflection film is plated on the surface of the lens frame to reduce the light reflection on the surface of the lens frame, so that the influence of the light reflection on imaging is reduced, and the imaging quality is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope covered by the contents disclosed in the present invention.

Fig. 1 is a flowchart of a method for reducing lens reflection according to an embodiment of the present invention.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present embodiment provides a method for reducing lens reflection, which is used to solve the technical problem in the background art.

It should be noted that the lens assembly includes a lens frame and a lens, and the lens frame is usually a cylinder or a ring with a mounting hole for mounting and fixing the lens and collecting light. When shooting, light enters the mounting hole, part of the light enters the lens to be imaged, part of the light shines on the surface of the lens frame around the lens, and the light possibly enters the lens again after being reflected. Therefore, the method provided by the embodiment aims to reduce the reflected light so as to reduce the reflection of the light in the inner cavity of the lens frame, thereby reducing the interference of the reflected light on the imaging so as to ensure the imaging quality of the lens assembly.

The method for reducing the reflection of the lens specifically comprises the following steps:

step S1, providing a vacuum coating machine, opening the coating chamber, cleaning the vacuum chamber, placing a lens seat frame, and closing the coating chamber;

the step is one of preparation works in the earlier stage of film coating;

s2, selecting an antireflection film system and introducing the antireflection film system into a vacuum coating machine;

determining the number of film layers of the antireflection film and the film thickness of each film layer; according to the number of layers and the thickness of the film, Si and Ti are set as targets;

step S3, starting a mechanical pump and a diffusion pump, opening a pre-valve, closing the pre-valve after 20 minutes, opening a low valve, and vacuumizing a film coating chamber;

the step is one of preparation works in the earlier stage of film coating;

step S4, when the air pressure of the film coating chamber is lower than 0.1Pa, closing the low valve, opening the high valve, and pumping high vacuum to the film coating chamber;

the step is one of preparation works in the earlier stage of film coating;

step S5, when the air pressure of the film coating chamber reaches 0.01Pa, the film coating chamber is not required to be opened for baking, the room temperature range is kept, and the film coating chamber is started to rotate at the rotating speed of 15 revolutions per minute;

the step is one of preparation works in the earlier stage of film coating; the purpose of keeping the room temperature is to prevent the lens frame from being damaged by high temperature, and because the lens frame is usually made of plastic, a cold plating mode is needed; then starting rotation to rotate the lens frame to prepare for film coating;

step S6, when the air pressure of the film coating chamber is below 0.001Pa, filling oxygen into the vacuum chamber, and then starting an ion source, a film thickness control instrument and an electron gun for evaporation;

the step is a film coating process, and SiO which is alternately laminated is formed on the surface of the lens frame by evaporation of an electron gun₂Film layer and TiO₂A film layer, thereby forming an antireflection film; in the coating process, the film thickness of each layer can be controlled by a film thickness controllerThickness, i.e. control of SiO₂Film layer and TiO₂The thickness of the film layer;

and step S7, after the evaporation is finished, the ultrasonic assembly line cleaning is carried out.

This step is after the coating by vaporization finishes, needs to wash the rete surface, and this embodiment can use ultrasonic cleaning.

According to the method for reducing the reflection of the lens, the reflection in the lens cavity after film coating is lower than 1%, so that interference light is effectively reduced, and the imaging quality of the lens assembly is ensured.

Further, in order to ensure the effect of the antireflection film, the number of layers of the antireflection film is any one of 5-12, and SiO is used₂Film layer and TiO₂The film layers are alternately laminated.

Specifically, the number of film layers and the corresponding film thickness are shown in the following table, where the substrate is plastic (corresponding to a lens holder), and the pass band (high transmittance band) is: 400 nm-700 nm.

Film layer	1	2	3	4	5	6	7	8	9
Material	TIO2	SIO2	TIO2	SIO2	TIO2	SIO2	TIO2	SIO2	TIO2
										Physical thickness nm	99.9	149.81	85.98	139.68	84.13	137.89	84.05	138.7	85.23
										Material	SIO2	TIO2	SIO2	TIO2	SIO2	TIO2	SIO2	TIO2	SIO2
Physical thickness nm	163.28	99.9	149.86	87.15	142.46	86.88	145.98	85.85	69.97
Material	TIO2	SIO2	TIO2	SIO2	TIO2	SIO2	TIO2
										Physical thickness nm	94.57	142.93	86.2	135.88	86.22	136.04	95.52
										Material	S1O2	TIO2	SIO2	TIO2	S1O2
Physical thickness nm	775.04	102.79	159.6	89.3	72.33
Material	TIO2	SIO2	TIO2	SIO2	TIO2	SIO2
										Physical thickness nm	107.75	174.53	127.3	12.45	132.93	87.18
										Material	SIO2	TIO2	SIO2	TIO2	SIO2	TIO2
Physical thickness nm	752.69	94.15	143.48	87.4	138.61	95.99

Further, in another embodiment of the present application, there is also provided a lens assembly including:

the lens frame is provided with a lens;

the antireflection film is arranged on the surface of the lens frame and arranged around the circumference of the lens and used for reducing light reflection on the surface of the lens frame.

Specifically, the antireflection film is coated on the lens frame by adopting the method for reducing the reflection of the lens.

In summary, according to the method for reducing reflection of a lens and the lens assembly provided by the embodiments, the antireflection film is plated on the surface of the lens frame to reduce light reflection on the surface of the lens frame, so that the influence of the light reflection on imaging is reduced, and the imaging quality is improved.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.