CN211937696U

CN211937696U - Lens coating clamp

Info

Publication number: CN211937696U
Application number: CN201921677651.9U
Authority: CN
Inventors: 李涛; 雷紫昂
Original assignee: Hangzhou Meidikai Photoelectric Technology Co ltd
Current assignee: Hangzhou Meidikai Photoelectric Technology Co ltd
Priority date: 2019-10-09
Filing date: 2019-10-09
Publication date: 2020-11-17
Anticipated expiration: 2029-10-09

Abstract

The utility model relates to a reflection prevention membrane lens processing field, and disclose a lens coating anchor clamps, the on-line screen storage device comprises a base, the base is the cylinder stock, and the inside of base is hollow, and the square groove has been seted up to the lower extreme of base, the square groove is used for being connected of base and outside motor fixed, the parallel fixed mounting in upper end have a workstation, the inside of workstation for disc and workstation is hollow form, the inside of workstation and the inside intercommunication of base, the upper end of workstation fixed mounting that makes progress perpendicularly has the pipeline of breathing in, and the pipeline of breathing in evenly distributed has sixteen groups. The utility model discloses in, to wavelength 400nm to the broadband wavelength of wavelength 800nm, can obtain the reflection prevention film that has high performance, reflection prevention performance, when inclination (CRA) incident angle changes, visual domain ripple, wavelength shift influence are less, obtain good reflection effect in broadband wavelength range, can obviously reduce the production of ghost image or flare, and this structural reflection prevention film firmness is excellent.

Description

Lens coating clamp

Technical Field

The utility model relates to a reflection prevention membrane lens processing field especially relates to a lens coating anchor clamps.

Background

Most of optical elements such as lenses and optical filters included in optical systems are manufactured using transparent substrates such as optical glass and optical plastic, and when the refractive index of the substrate is increased, the reflectance of the light incident surface and the light exit surface (light incident and exiting surface) is increased, so that the effective light amount reaching the image plane is reduced, and unnecessary reflection reflected from the light incident and exiting surface of the optical element causes ghost and flare phenomena to enter the image plane, which causes deterioration of the optical performance of the optical system.

In addition, since unnecessary ghost and flare reaching the image plane are greatly changed depending on the light beam incident angle to the optical element and the shape of the optical element by the reflection on the light incident and exiting surface, a good antireflection effect can be obtained in each incident angle (CRA) as a wide wavelength region as possible as an antireflection film to be added to the substrate; as an antireflection film to be added to the light entrance and exit surface of the substrate, a multilayer antireflection film in which a plurality of thin dielectric films are stacked together is formed on the light entrance and exit surface of the substrate by plating; in general, the antireflection film has more layers stacked, and the antireflection effect is greater, and the wavelength band for preventing reflection is also widened.

In the current market, a single coating process is adopted to coat a layer of anti-reflection film on the surface of a substrate for a lens, especially a non-planar lens, in some multi-layer films using evaporation, the reflectivity is reduced in a broadband wavelength range of 400nm to 730nm, and a large number of film layers are needed to obtain a good anti-reflection function, when the number of the film layers is increased, visible domain ripples and wavelength shift influence are large when the light is incident at a strict inclination angle (CRA), and a good reflection effect in the broadband wavelength range is difficult to obtain. To this end we propose a lens coating fixture.

SUMMERY OF THE UTILITY MODEL

In order to realize the above aim, the utility model mainly designs a lens coating anchor clamps, the on-line screen storage device comprises a base, the base is the cylinder stock, and the inside of base is hollow, and the square groove has been seted up to the lower extreme of base, the square groove is used for being connected of base and outside motor fixed, the parallel fixed mounting in upper end of base has the workstation, the inside of workstation for disc and workstation is hollow form, the inside of workstation and the inside intercommunication of base, the upper end of workstation fixed mounting that makes progress perpendicularly has the pipeline of breathing in, and the pipeline of breathing in evenly distributed has sixteen groups, the inside hole groove of breathing in of having seted up of pipeline of breathing in.

Preferably, inhale the hole groove and can carry out corresponding design according to the lens size, the platform also can carry out size adjustment according to the demand, the upper end of breathing in the pipeline adsorbs there is lens.

Preferably, the workbench, the air suction pipeline and the suction hole groove are integrally formed.

Preferably, the edge of the suction hole groove is designed into an arc shape of 30-60 degrees, and the suction hole groove firmly sucks the lens during operation.

Preferably, the base, the workbench and the hole sucking groove are all made of POM plates.

The lens coating adopts an innovative spin coating process, is manufactured by utilizing a Sol-Gel principle, and controls the thickness of the coating layer through the rotating speed, the rotating time, the solvent volatilization speed and the position of the lens so as to meet the requirement of the required optical performance, namely, the faster the rotating time is, the thinner the coating layer is, and the longer the rotating time is within a certain rotating time, the thinner the coating layer is; the higher the solvent evaporation rate, the thicker the coating layer, the farther the lens position is from the center position, the higher the centrifugal force (F ═ m ω 2r), the thinner the coating layer thickness, and in the case of a non-planar lens having a height difference, firstly, the ink is dripped on the surface of the lens to ensure that the surface of the lens is completely covered by the ink, then the coating mode is carried out, and the coating process is controlled to keep the thickness of the coating layer on the surface of the lens at high speed and uniformity, the coating process keeps high rotating speed as much as possible, ink at different positions on the surface of the lens can be thrown out in time under the high rotating speed state, the thickness uniformity of the coating layer is improved, the ink layer with high thickness can be coated for multiple times at high rotating speed to control the thickness uniformity of the coating layer, when the coating is carried out at a low rotating speed, the coating liquid is easily deposited at the groove position of the lens, so that the difference of ink volatilization speeds is increased, the film forming speed is inconsistent, and the difference of ink layer thicknesses is increased. The anti-reflection film is arranged on the surface of the lens and formed by stacking two low-reflection layers, the refractive index of the lens is more than 1.53 and less than 1.70, the refractive index of the first low-reflection layer in the two low-reflection layers is 1.30-1.50, the thickness of the optical film is 60-140 nm, the refractive index of the second low-reflection layer is 1.15-1.23, and the thickness of the optical film is 60-140 nm.

The refractive indexes of the substrate layer and the multilayer film are set to be obtained under the d line of a He light source, and the wavelength of the d line is 587.56 nm.

The maximum value and the minimum value of the reflectivity of the anti-reflection film to light rays at an incident angle of 0 degree are respectively not more than 0.2% and not more than 0.1%, and the wavelength of the light rays is in the range of 450nm to 600 nm.

The maximum value of the reflectivity of the reflection preventing film to light at an incident angle of 0 degree is not more than 0.8%, and the wavelength of the light is within the range of 380 nm-780 nm.

The first low reflection layer is composed of a monomer of SiO2 and MgF2 or a compound thereof, and the second low reflection layer is composed of hollow fine particles containing Si.

An optical member comprising the antireflection film, wherein the antireflection film is provided on one surface or both surfaces of a lens of the optical member.

The hollow fine particles are bonded by the adhesive, and since the hollow fine particles have voids (pores) therein, the refractive index can be lowered by air (refractive index 1.0) contained in the voids; meanwhile, since the hollow fine particles have voids therein, the voids prevent the hollow fine particles from adsorbing moisture and impurities, and thus stable optical characteristics with good environmental resistance and less variation in refractive index can be obtained. In order to form a film with uniform film thickness on a substrate with a curved surface like a lens, firstly, a spraying process is adopted to uniformly spray coating on the surface of the substrate, and the sprayed ink is uniformly thrown away by using a spin coating process, so that the coating film thickness on the surface of the substrate is uniform, and a compact coating layer is formed. After coating, baking in a dust-free oven by adopting a step-type heating mode, wherein the temperature is generally below 300 ℃.

Advantageous effects

The utility model provides a lens coating anchor clamps. The method has the following beneficial effects:

(1) the lens coating jig can obtain a reflection preventing film having high performance and reflection preventing performance for a wide band wavelength of 400nm to 800nm, has small influences of visible domain ripples and wavelength shift when the incidence angle of a CRA is changed, obtains a good reflection effect in a wide band wavelength range, can obviously reduce the generation of ghosts or flares, and has excellent structural reflection preventing film firmness.

(2) This lens coating anchor clamps, the simple and easy operation of being convenient for of coating anchor clamps of design simultaneously, through the unsettled absorption of adsorption mode with lens, appear the ink leakage phenomenon when avoiding the single face coating.

(3) The lens coating clamp is simple in design, low in manufacturing cost, capable of achieving an ultralow radiation effect and solving the problem of lens coating in the market, and the product coated by the process is uniform in surface ink layer, small in thickness variation and excellent in film firmness.

Drawings

FIG. 1 is a schematic structural view of a lens according to the present invention;

FIG. 2 is a schematic structural diagram of the optical path component of the present invention;

FIG. 3 is a first reflectance characteristic diagram of the antireflection film according to the present invention;

FIG. 4 is a second reflectance characteristic diagram of the antireflection film according to the present invention;

FIG. 5 is a third graph showing the reflectance characteristics of the antireflection film according to the present invention;

FIG. 6 is a schematic view of a coating jig;

FIG. 7 is a schematic view of a table of the coating fixture;

fig. 8 is a schematic view of an air suction duct of the coating jig.

Illustration of the drawings:

1 base, 2 workstations, 3 pipeline, 4 suction hole grooves, 5 lens of breathing in.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example (b): the utility model provides a lens coating anchor clamps, as shown in fig. 6-8, includes base 1, base 1 is the cylinder stock, and base 1's inside is hollow, and the square groove has been seted up to base 1's lower extreme, the square groove is used for being connected of base and outside motor fixed, the parallel fixed mounting in upper end of base has workstation 2, workstation 2 is disc and workstation 2's inside and is hollow form, workstation 2's inside and base 1's inside intercommunication, the perpendicular upwards fixed mounting in upper end of workstation 2 has inspiratory tube 3, and inspiratory tube 3 evenly distributed has sixteen groups, inspiratory tube 3 is inside to have seted up and to inhale hole groove 4, inhales hole groove 4 and can carry out corresponding design according to the lens size, and the platform also can carry out size adjustment according to the demand, the upper end of inspiratory tube 3 adsorbs there is lens 5.

The workbench 2, the air suction pipeline 3 and the suction hole groove 4 are integrally formed, and the edge ineffective area of the lens 5 is small, so that the edge of the suction hole groove 4 is designed into an arc shape of 30-60 degrees, and the suction hole groove 4 firmly adsorbs the lens 5 during operation.

The base 1, the workbench 2 and the suction hole groove 4 are all made of POM plates.

The use method and the effect of the clamp are shown in figures 1-5, the clamp is particularly used for non-planar lenses, an innovative spin coating process is adopted when the clamp is used, the Sol-Gel principle is utilized for manufacturing, the thickness of the coating layer is controlled through the rotating speed, the rotation time, the solvent volatilization speed and the position of the lens so as to meet the requirement of the required optical performance, namely, the faster the rotation time is, the thinner the coating layer is, and the longer the rotation time is, the thinner the coating layer is within a certain rotation time; the higher the solvent evaporation rate, the thicker the coating layer, the farther the lens is located from the center position, the higher the centrifugal force (F ═ m ω 2r), the thinner the coating layer thickness, and in the case of a non-planar lens having a height difference, firstly, the ink is dripped on the surface of the lens to ensure that the surface of the lens is completely covered by the ink, then the coating mode is carried out, and the coating process is controlled to keep the thickness of the coating layer on the surface of the lens at high speed and uniformity, the coating process keeps high rotating speed as much as possible, ink at different positions on the surface of the lens can be thrown out in time under the high rotating speed state, the thickness uniformity of the coating layer is improved, the ink layer with high thickness can be coated for multiple times at high rotating speed to control the thickness uniformity of the coating layer, when the coating is carried out at a low rotating speed, the coating liquid is easily deposited at the groove position of the lens, so that the difference of ink volatilization speeds is increased, the film forming speed is inconsistent, and the difference of ink layer thicknesses is increased. The anti-reflection film is arranged on the surface of the lens and formed by stacking two low-reflection layers, the refractive index of the lens is more than 1.53 and less than 1.70, the refractive index of the first low-reflection layer in the two low-reflection layers is 1.30-1.50, the thickness of the optical film is 60-140 nm, the refractive index of the second low-reflection layer is 1.15-1.23, and the thickness of the optical film is 60-140 nm.

The utility model discloses a theory of operation: this scheme base 1 is driven rotatoryly by the work motor, workstation 2 is fixed with base 1, workstation 2 and base 1 can synchronous revolution, lens 5 places on inhaling hole groove 4, it sets up according to lens 5 size to inhale hole groove 4 size, make lens 5 edge just inlay on inhaling hole groove 4 after the adjustment, workstation 2 adopts the vacuum adsorption principle, make lens 5 firmly adsorbed on inhaling hole groove 4, the altitude control of inhaling hole groove 4 is between 5mm-10mm, during the coating, printing ink drips on lens 5 surface, when external motor drives base 1 rotation, unnecessary printing ink is got rid of on the platform, lens 5 another side is inhaled hole groove 4 protection, avoid being polluted by printing ink, cause the outward appearance bad.

Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above-described embodiments, and many modifications are possible. Any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should be considered as belonging to the protection scope of the present invention.

Claims

1. A lens coating clamp comprises a base (1), and is characterized in that: the base (1) is a cylindrical long rod, the interior of the base (1) is hollow, and a square groove is formed in the lower end of the base (1);

parallel fixed mounting in upper end of base (1) has workstation (2), the upper end perpendicular upwards fixed mounting of workstation (2) has inspiratory tube (3), and inspiratory tube (3) evenly distributed has sixteen groups, inspiratory tube (3) inside has been seted up and has been inhaled hole groove (4), the upper end adsorption of inspiratory tube (3) has lens (5).

2. The lens coating jig of claim 1, wherein: the workbench (2) is disc-shaped, the inside of the workbench (2) is hollow, and the inside of the workbench (2) is communicated with the inside of the base (1).

3. The lens coating jig of claim 1, wherein: the workbench (2), the air suction pipeline (3) and the suction hole groove (4) are integrally formed.

4. The lens coating jig of claim 1, wherein: the base (1), the workbench (2) and the hole suction groove (4) are all made of POM plates.