CN1068545C - Curtain wall glass without white light pollution - Google Patents

Abstract

The present invention relates to curtain wall glass without white light pollution, which is mainly used in buildings. A film layer which can reduce the reflection of visible light and is formed by the alternative superposition of a high refractivity and a low refractivity and a film layer of which the reflectivity to infrared light is more than 70% are deposited on the surface of a glass substrate. The present invention is basically characterized in that the present invention has high reflectivity which is bigger than 70% to the infrared light, and the reflection of the visible light is reduced to a minimum limit, namely that the surface on which the films are deposited has the smaller reflectivity of the visible light than the reflectivity of substrate glass, and the reflectivity is less than 2%. Therefore, the present invention is called the curtain wall glass without the white light pollution.

Description

The cladding glass of no white light pollution

The present invention relates to a kind of cladding glass that does not have white light pollution.

No white light pollution cladding glass is meant that cladding glass is less than the reflectivity (as be less than with the crown glass be the cladding glass substrate, the reflectivity of its single face is 4.2%) of substrate of glass for the reflectivity of visible region, and infrared light region has very big reflectivity.Be mainly used in buildings.

In the prior art, coated glass product for building generally is divided into two big classes: anti-sunlight type and high-transmission rate/low-E coated glass.

Anti-sunlight type glass normally is substrate (usually being with look) with glass, be coated with a kind of band look film of low visible light transmissivity, this film has reduced to see through prevents that sunlight type glass enters the solar energy of interior of building, thereby reduced the temperature in the buildings, saved the air-conditioning expense in season at summer high temperature.These anti-sunlight type glassy products are the most effective at warm weather, and are modal by being used on the commercial establishment.

In the place of more being concerned about the heating expense especially dwelling house, need the coated glass of high-transmission rate/low-E, make visible light with in the high transmissivity inlet chamber, the while infrared radiation reflecting, thus keep the interior heat of buildings.The coated glass of high-transmission rate/low-E, on substrate of glass topped rete multilayer film normally, it is that the metallic membrane (for example, Ag, Au, or Cu film) of reflected infrared is clipped between the metal oxide rete of two anti-visible lights reflections that one deck is wherein arranged.

The rete that anti-sunlight type glass is plated generally is the unitary film such as one or more metals such as cobalt, iron, titanium, chromium, nickel, copper or metal oxide.

The metallic membrane of the anti-sunlight type glass of preparation adopts chemical process such as U.S. Pat 3846152, US4091172, US3723158 and US3457138, the metal oxide film of the anti-sunlight type glass of preparation adopts pyrolysis method such as U.S. Pat 3660061, US3658568, US3978272 and US4100330 report.

Described the sputtering technology of the multilayer film of manufacturing high-transmission rate/low-E among U.S. Pat 4462884 and the US4508789.Also having disclosed the plated film of making anti-sunlight type glass employing in U.S. Pat 4512863 and US4594137 is to use sputtering technology.

U.S. PPG Industries Inc. discloses a kind of sputtered film of metal alloy oxide at Chinese patents CN85109342A, and the oxide compound that wherein adopts Zn and Sn alloy is as anti--reflective metal oxide compound and transparent metal film bonded material of construction.This metal oxide film must have suitably high specific refractory power, its specific refractory power more preferably greater than 2.0 with reflection that reduces metal level and the light transmission of strengthening coating.But the alloyed oxide that adopts Zn and Sn is the antireflection with respect to the infra-red reflective metal film as anti--reflective metal sull, rather than the antireflection of relative substrate of glass, therefore can not eliminate substrate of glass to visible reflection of light.

U.S. PPG Industries Inc. is at Chinese patents CN88101654A, disclose and a kind ofly formed a kind of low radiating multilayer film with titanium oxynitrides and an infrared reflection film (as Ag) combined deposition, the titanium oxynitrides film can use with other metallic membrane with various thickness and structure, thus the very wide a series of reflected colour glass of formation scope.It is to utilize the not reflection of coated surface, makes this material of construction have color, and the minimum reflectivity of not plated film substrate surface described here is 5%.

U.S. PPG Industries Inc. discloses a kind of multilayer high transmission rate, low emissivity film at Chinese patents CN86108656, is a kind of with Zn ₂SnO ₄Be the antireflection metal oxide, improved its resistance to chemical corrosion with existing of titanium oxide outer coating.Its structure is that the first layer is the first transparent antireflection metal oxide film Zn ₂SnO ₄, the second layer is a transparent red external reflectance metal silverskin, the 3rd layer is transparent antireflection metal oxide film Zn ₂SnO ₄The 4th layer is sedimentary metal oxide titanium oxide after the 3rd layer of antireflection metal oxide film, because the specific refractory power of thin film of titanium oxide is greater than 2.0, it is greater than the specific refractory power of substrate of glass, so it can not make film low to the reflectivity that is less than substrate of glass at the reflectivity of visible region.The product that adopts this method to obtain is 5% from the reflectivity of plated film one sidelight of glass, and the reflectivity of plated film one side is not 6%, so it does not thoroughly eliminate visible reflection of light.

U.S. PPG Industries Inc. is at Chinese patents CN87105971A, the high/low radiation coating goods of a kind of multi-layer transparent degree are disclosed, its processing of can heating, as bending, annealing, lamination, glass welding etc., coating is used for heatable antifreeze, defrosting, demist transparency as high-temperaure coating, adopts two-layer antireflection metal oxide in this invention.Also be antireflection, do not have the antireflection of relative substrate of glass with respect to the infra-red reflective metal film.Therefore do not eliminate visible reflection of light yet.

U.S. PPG Industries Inc. is at Chinese patents CN1105712A, a kind of method and product obtained by this method are disclosed, the technology that particularly prepares competent metal oxide film with magnetron sputtering, this invention relate to a kind of under enough inert atmosphere the method for splash-proofing sputtering metal target, make sputter carry out, and sedimentary film is metallic state basically in the metal mode, yet, in gas, also add enough reactive gass, make metallic film be non-crystalline state rather than crystalline state.Amorphous sputtered metal film, than in the gas that has only the rare gas element component, the metallic film hardness height and the good endurance of sputter, amorphous sputtered metal film can more effectively carry out thermooxidizing than sedimentary metallic film in only by rare gas element, the result obtains a kind of crystalline state metal oxide film, and such metal oxide film has higher chemical stability than the sedimentary amorphous metal oxide film of splash-proofing sputtering metal in oxidizing atmosphere.Its objective is that such product can in very large range be made the very on a large scale interior desired reflection colour of different thickness to obtain to cause owing to interference effect, illustrates that it has bigger reflection in order to obtain the weather resistance product that high hardness is become reconciled.

U.S. PPG Industries Inc. is at Chinese patents CN1037550A; a kind of visually be neutral high-transmission rate, low scattered power coated products and making method are disclosed; comprise three kinds of membrane structures in this invention; wherein have a structure to be: the first layer is that specific refractory power is about 2.0 transparent antireflection metal oxide; the second layer is a specific refractory power greater than 2.0 transparent neutral metal oxide compound; the 3rd layer is the metallic membrane of anti-infrared light; the 4th layer is transparent neutral metal titanium; layer 5 is transparent antireflection metal oxide film, wherein also comprises titanium dioxide protective layer.The specific refractory power of the first layer transparent film in this structure is about 2.0, the specific refractory power of second layer film is greater than 2.0, titanium dioxide for example, this is in order to improve cohesiveness between metal and the metal oxide, improve the weather resistance of metal alloy oxide film, especially improve the weather resistance of the multilayer film of forming by metal alloy oxide and metal (as silver).But it can not make film be less than the reflectivity of substrate of glass at the reflectivity of visible region.Adopt two-layer antireflection metal oxide in this invention.Also be antireflection, do not have the antireflection of relative substrate of glass with respect to the infra-red reflective metal film.In this invention, be 5% at the visible reflectance of coating one side, the visible reflectance of coating one side is not 6%, illustrates that its reflection is not lower than the reflectivity of general substrate of glass (4.2%), does not eliminate visible reflection of light.

As mentioned above, high-transmittance, the coating of low diathermaneity usually is clipped in order to institute in the non-conductive layer of the metal oxide that reduces the visible light reflection by reflects infrared light and low radiating thin metal layer and forms.The typical production method of these multilayer films is cathode sputtering, and metal level can be gold or copper, and normally silver-colored, metal oxide layer comprises stannic oxide, titanium oxide, zinc oxide, Indium sesquioxide, bismuth oxide, aluminum oxide or zirconium white.

The film article that is obtained in the above various technology, the metal oxide of every employing minimizing visible light reflection, all be the reflection that reduces transparent metal layer, and fail to reduce the reflection of substrate of glass.Be to have the intensive dazzle in the sun in the time of on being used for buildings.This white light pollution has brought new public hazards to modern city, and gives the navigation of aircraft, and the driving of automobile has brought difficulty, and makes observatory have to move out of the city.

Purpose of the present invention is eliminated visible reflection of light as far as possible, and infrared light is had higher reflection for overcoming above-mentioned several weak point, does not have visible reflection of light when product of the present invention is used as glass curtain wall and does not have white light pollution thereby reach.

The present invention utilizes transparent metal silverskin or dielectric material titanium nitride and transparent dielectric film to mate, regulate the thickness of each layer film, make film have high-reflectivity in infrared light region, and reach extremely low limit at the visible region reflectivity, be less than cladding glass that the reflectivity of coated glass not promptly contains film to the reflectivity of visible light reflectivity, to eliminate white light pollution less than substrate glasses.

The cladding glass of no white light pollution of the present invention is the structure that adopts deposit film 2 in the substrate 1 of glass, and Fig. 1 is a structural representation of the present invention.Substrate of glass can be colourless also can be colored.

The film system design of film will be satisfied two conditions:

The one, have low reflectivity in the visible region.

The 2nd, have high reflectivity in the infrared light district.

For satisfying above-mentioned two conditions by the film structure design to film, the thickness of regulating each tunic in the film system makes the visible region have low reflectivity, and has high reflectivity in the infrared light district.

Film layer structure of the present invention is in proper order:

By substrate of glass 1 beginning, be deposited on substrate of glass 1 lip-deep the first layer film 21 and be by specific refractory power greater than 2.0 metal oxide, as TiO ₂Constitute.Second layer film 22 is to be deposited on the first layer film 21, is the silicon oxide film of specific refractory power less than the specific refractory power (1.5) of substrate of glass 1, as SiO ₂(specific refractory power is 1.46).Three-layer thin-film 23 is to be deposited on the second layer film 22, is made of the material that infrared light is had high-reflectivity, and promptly reflectivity is greater than 70%, as metal A g or TiN.Four-level membrane 24 is to be deposited on the three-layer thin-film 23, is made of greater than 2.0 metal oxide specific refractory power, as TiO ₂Layer 5 film 25 is to be deposited on the four-level membrane 24, is made of the material of specific refractory power less than the specific refractory power (1.5) of substrate of glass, as SiO ₂As shown in Figure 1.

The first layer specific refractory power is arranged greater than 2.0 material such as TiO in the film layer structure ₂The film that is constituted has the reflection of the rete of high reflectance at visible region to reduce the 3rd layer to infrared light.Second layer specific refractory power is less than the material such as the SiO of the specific refractory power 1.5 of substrate of glass ₂The film that is constituted is to reduce the reflection of substrate of glass.Trilaminar purpose is to reach by infrared light being had high-reflectivity promptly to adopt reflectivity greater than 70%, constitutes as metal A g or TiN.The 4th layer identical with the first layer.The 5th is identical with the second layer.Crux is to mate between each rete in the structure, and mutually alternately stack and make monolithic film membrane have antireflection characteristic at visible region has high reflection characteristic in the infrared light district.

Expression film structure feature significant parameter comprises thicknesses of layers d, and rete is counted m, film material, and reflectivity R and transmissivity T, they should satisfy following formula.

The specific refractory power of substrate and all retes is represented phase place thickness with plural form $\mathrm{\&delta;}=\frac{2\mathrm{\&pi;}}{\mathrm{\&lambda;}}(n-\mathrm{ik})d=\frac{2\mathrm{\&pi;}}{\mathrm{\&lambda;}}\mathrm{nd}-\mathrm{<figure-callout\; id="2"\; label="i"\; filenames="C9710625400101.png"\; state="\{\{state\}\}">i</figure-callout>}\frac{2\mathrm{\&pi;}}{\mathrm{\&lambda;}}\mathrm{kd}--------\left(1\right)$ D is the thickness of rete, and n is the specific refractory power of rete

Order $\mathrm{\&delta;}=\frac{2\mathrm{\&pi;}}{\mathrm{\&lambda;}}\mathrm{nd},{\mathrm{\&delta;}}_2=\frac{2\mathrm{\&pi;}}{\mathrm{\&lambda;}}\mathrm{kd}--------\left(2\right)$

δ ₁, δ ₂All be real number, so δ=δ ₁-i δ ₂

cosδ=cosδ ₁.chδ ₂+isinδ ₁.shδ ₂.

Make c ₁=cos δ ₁.ch δ ₂, c ₂=sin δ ₁.sh δ ₂

Thereby cos δ=c ₁+ ic ₂

Same sin δ=sin δ ₁.ch δ ₂-icos δ ₁.sh δ ₂

Make s ₁=sin δ ₁.ch δ ₂, s ₂=-cos δ ₁.sh δ ₂

So s ₁+ is ₂.

Recursion formula $Y_j=\frac{Y_{j+1}\cos {\mathrm{\&delta;}}_j+{\mathrm{i\&eta;}}_j\sin {\mathrm{\&delta;}}_j}{{\cos \mathrm{\&delta;}}_j+i^{Y_{j+1}}/\left({\mathrm{\&eta;}}_j\sin {\mathrm{\&delta;}}_j\right)}---\left(3\right)$

Corresponding being write as: $Y_j=\frac{(y_{j+1}^{\left(1\right)}{c}_1-y_{j+1}^{\left(2\right)}{\mathrm{<figure-callout\; id="2"\; label="c"\; filenames="C9710625400101.png"\; state="\{\{state\}\}">c</figure-callout>}}_2+k_i{s}_i-n_j{s}_2)+i(y_{j+1}^2{\mathrm{<figure-callout\; id="1"\; label="c"\; filenames="C9710625400101.png,C9710625400102.png"\; state="\{\{state\}\}">c</figure-callout>}}_1+y_{j+2}^{\left(1\right)}{\mathrm{<figure-callout\; id="2"\; label="c"\; filenames="C9710625400101.png"\; state="\{\{state\}\}">c</figure-callout>}}_2+{\mathrm{<figure-callout\; id="1"\; label="n\; j\; s"\; filenames="C9710625400101.png,C9710625400102.png"\; state="\{\{state\}\}">n</figure-callout>}}_j{s}_{}{}_1+k_j{s}_2)}{{{\mathrm{<figure-callout\; id="1"\; label="c"\; filenames="C9710625400101.png,C9710625400102.png"\; state="\{\{state\}\}">c</figure-callout>}}_1+{\mathrm{ic}}_2-}^{\&lsqb;y_{j+1}^{\left(2\right)}{\mathrm{<figure-callout\; id="1"\; label="s"\; filenames="C9710625400101.png,C9710625400102.png"\; state="\{\{state\}\}">s</figure-callout>}}_1+y_{j+1}^{\left(1\right)}{\mathrm{<figure-callout\; id="2"\; label="s"\; filenames="C9710625400101.png"\; state="\{\{state\}\}">s</figure-callout>}}_2+i(y_{j+1}^{\left(2\right)}{s}_2-y_{j+1}^{\left(1\right)}{s}_1)\&rsqb;}/(n_j-{\mathrm{ik}}_j)}$

Order $b_1=y_{j+1}^{\left(2\right)}{\mathrm{<figure-callout\; id="1"\; label="s"\; filenames="C9710625400101.png,C9710625400102.png"\; state="\{\{state\}\}">s</figure-callout>}}_1+y_{j+1}^{\left(1\right)}{\mathrm{<figure-callout\; id="2"\; label="s"\; filenames="C9710625400101.png"\; state="\{\{state\}\}">s</figure-callout>}}_2,b_2=y_{j+1}^{\left(2\right)}{s}_2-y_{j+1}^{\left(2\right)}{s}_1$ ${\mathrm{<figure-callout\; id="1"\; label="q"\; filenames="C9710625400101.png,C9710625400102.png"\; state="\{\{state\}\}">q</figure-callout>}}_1=\frac{n_j{b}_1-k_j{b}_2}{{\mathrm{<figure-callout\; id="2"\; label="n\; j"\; filenames="C9710625400101.png"\; state="\{\{state\}\}">n</figure-callout>}}_j^{}+k_{\mathrm{<figure-callout\; id="2"\; label="j"\; filenames="C9710625400101.png"\; state="\{\{state\}\}">j</figure-callout>}}^2},{\mathrm{<figure-callout\; id="2"\; label="q"\; filenames="C9710625400101.png"\; state="\{\{state\}\}">q</figure-callout>}}_2=\frac{k_i{b}_1+n_j{b}_2}{{\mathrm{<figure-callout\; id="2"\; label="n\; j"\; filenames="C9710625400101.png"\; state="\{\{state\}\}">n</figure-callout>}}_j^{}+{\mathrm{<figure-callout\; id="2"\; label="k\; j"\; filenames="C9710625400101.png"\; state="\{\{state\}\}">k</figure-callout>}}_j^{}}$

So $Y_j=\frac{(y_{j+1}^{\left(1\right)}{c}_1-y_{j+1}^{\left(2\right)}{\mathrm{<figure-callout\; id="2"\; label="c"\; filenames="C9710625400101.png"\; state="\{\{state\}\}">c</figure-callout>}}_2+k_j{s}_1-n_j{s}_2)+i(y_{j+1}^{\left(2\right)}{\mathrm{<figure-callout\; id="1"\; label="c"\; filenames="C9710625400101.png,C9710625400102.png"\; state="\{\{state\}\}">c</figure-callout>}}_1+y_{j+1}^{\left(1\right)}{\mathrm{<figure-callout\; id="2"\; label="c"\; filenames="C9710625400101.png"\; state="\{\{state\}\}">c</figure-callout>}}_2+{\mathrm{<figure-callout\; id="1"\; label="n\; j\; s"\; filenames="C9710625400101.png,C9710625400102.png"\; state="\{\{state\}\}">n</figure-callout>}}_j{s}_{}{}_1+k_j{s}_2)}{\left(c_{1-}{q}_1\right)+i(c_2-q_2)}----\left(4\right)$

Order $a_1=y_{j+1}^{\left(1\right)}{c}_1-y_{j+1}^{\left(2\right)}{\mathrm{<figure-callout\; id="2"\; label="c"\; filenames="C9710625400101.png"\; state="\{\{state\}\}">c</figure-callout>}}_2+k_j{s}_1-{\mathrm{<figure-callout\; id="2"\; label="n\; j\; s"\; filenames="C9710625400101.png"\; state="\{\{state\}\}">n</figure-callout>}}_j{s}_{}{}_2,a_2=y_{j+1}^{\left(2\right)}{\mathrm{<figure-callout\; id="1"\; label="c"\; filenames="C9710625400101.png,C9710625400102.png"\; state="\{\{state\}\}">c</figure-callout>}}_1+y_{j+1}^{\left(1\right)}{\mathrm{<figure-callout\; id="2"\; label="c"\; filenames="C9710625400101.png"\; state="\{\{state\}\}">c</figure-callout>}}_2+{\mathrm{<figure-callout\; id="1"\; label="n\; j\; s"\; filenames="C9710625400101.png,C9710625400102.png"\; state="\{\{state\}\}">n</figure-callout>}}_j{s}_{}{}_1+{\mathrm{<figure-callout\; id="2"\; label="k\; j\; s"\; filenames="C9710625400101.png"\; state="\{\{state\}\}">k</figure-callout>}}_j{s}_{}{}_2.$ $a_3=c_1-{\mathrm{<figure-callout\; id="1"\; label="q"\; filenames="C9710625400101.png,C9710625400102.png"\; state="\{\{state\}\}">q</figure-callout>}}_1,a_4=c_2-{\mathrm{<figure-callout\; id="2"\; label="q"\; filenames="C9710625400101.png"\; state="\{\{state\}\}">q</figure-callout>}}_2.$

$Y_j=y_j^{\left(1\right)}+{\mathrm{ij}}_j^{\left(2\right)},$

Here $y_j^{\left(1\right)}=\frac{a_1{a}_3+a_2{a}_4}{a_3^2+a_4^2},y_j^{\left(2\right)}=\frac{a_2{a}_3-a_1{a}_4}{a_3^2+a_4^2}.$

The ratio ψ of the energy-flux density on adjacent two interfaces of rete _jFor: ${\mathrm{\&Psi;}}_j{=}^{y_{j+1}^{\left(1\right)}}/\&lsqb;y_j^{\left(1\right)}{|\cos {\mathrm{\&delta;}}_j+{\mathrm{iy}}_{j+1}\sin {\mathrm{\&delta;}}_j/N_j|}^2\&rsqb;-----\left(5\right)$

Correspondingly can be write as: ${\mathrm{\&psi;}}_j=y_{j+1}^{\left(1\right)}/\&lsqb;y_j^{\left(1\right)}(a_3^2+a_4^2)\&rsqb;.$

Like this, begin recursion to top layer, obtain the combination admittance that whole film is at last from substrate: ${\mathrm{<figure-callout\; id="1"\; label="Y"\; filenames="C9710625400101.png,C9710625400102.png"\; state="\{\{state\}\}">Y</figure-callout>}}_1=y_1^{\left(1\right)}+{\mathrm{iy}}_1^{\left(2\right)}.$

Amplitude reflectance is: $r=\frac{{(N_0-y_1^{\left(1\right)})}^2-i{y}_1^{\left(2\right)}}{{({\mathrm{<figure-callout\; id="0"\; label="N"\; filenames="C9710625400102.png"\; state="\{\{state\}\}">N</figure-callout>}}_0+y_1^{\left(1\right)})}^2+{\mathrm{iy}}_1^{\left(2\right)}}.--------\left(6\right)$

Reflectivity: $R=\frac{{(N_0-y_1^{\left(1\right)})}^2+{\left(y_1^{\left(2\right)}\right)}^2}{{(N_0+y_1^{\left(1\right)})}^2+{\left(y_1^{\left(2\right)}\right)}^2}.--------\left(7\right)$

The transmissivity that whole film is is: $T=(1-R)\underset{j=1}{\overset{m}{\mathrm{\&Pi;}}}{\mathrm{\&psi;}}_j--------\left(8\right)$

(8) m is the number of plies of rete in the formula

Film will reach the design that meets film system by the control to film thickness d in preparation process.In the depositing of thin film process, select different mode of deposition according to differing materials.The structure of film 2 has multiple.

Advantage of the present invention: cladding glass of the present invention, can have high-reflectivity in infrared light region, and reach extremely low limit at the visible region reflectivity, be less than cladding glass surface that the reflectivity of coated glass not promptly deposits film to the reflectivity of visible light reflectivity less than substrate glasses, therefore can reach reflectivity less than 2%, eliminate the public hazards that white light pollution brings modern city.

Description of drawings:

Fig. 1 is a structural representation of the present invention

Fig. 2 is the reflectance curve of the cladding glass of no white light pollution of the present invention

Fig. 3 is the transmittance graph of the cladding glass of no white light pollution of the present invention

Fig. 4 is the reflectance curve of the cladding glass of no white light pollution of the present invention in the visible region

Embodiment: the reflectivity that table 1 is pairing visible light and infrared light region for several different films.

Film layer structure in the table 1 as shown in Figure 1.

With the film of table 1 is 1 to be example, and when reflectivity R 〉=85% of infrared rays wave band, the reflectivity of visible light is R≤1% o'clock.Extrapolate the film structure of film according to above-mentioned formula (1)-(8) formula, wherein rete is counted m=5, and window glass is adopted in substrate 1, and its specific refractory power is 1.52, and the material of film system: rete 21 is TiO ₂, rete 22 is SiO ₂, rete 23 is Ag, rete 24 is TiO ₂, rete 25 is SiO ₂The thickness d of each tunic layer is respectively: substrate of glass/d ₁25nm/d ₂5nm/d ₃10nm/d ₄25nm/d ₅50nm.Magnetron sputtering deposition is adopted in the preparation of film.Architectural is to adopt large-scale magnetic control sputtering system with cladding glass, and sputtering system has device for automatically controlling.

The rete 21TiO of film ₂Deposition adopts reactive sputter-deposition, and during splash-proofing sputtering metal Ti target, sputter gas is an argon gas, and reactant gases is an oxygen, and the flow of oxygen is controlled by gas flow meter.The flow of oxygen is 0.8cm ³/ sccm (25 ℃, 1 normal atmosphere), sputtering power is 400W, operating air pressure is 2Pa.

The rete 22SiO of film ₂The direct sputter SiO of deposition ₂Material does not charge into reactant gases, and sputtering power is 900W, and operating air pressure is 2Pa.

The direct splash-proofing sputtering metal silver of the deposition of the rete 23Ag of film target does not charge into reactant gases, and sputtering power is 500W, and operating air pressure is 2Pa.

The rete 24TiO of film ₂With rete 21TiO ₂Mode of deposition identical.

The rete 25SiO of film ₂With rete 22SiO ₂Mode of deposition identical.

The thickness of each layer film of the present invention should satisfy (1)-(8) formula, as long as in the lower scope of the luminance factor of visible region, the thickness of each tunic has certain variation range.The variable thickness of each tunic is calculated value surely, but each listed thicknesses of layers shows second layer thicknesses of layers d from table 1 ₂〉=0, and the thickness of other each retes all must be simultaneously greater than 0, i.e. d simultaneously ₁＞0, d ₃＞0, d ₄＞0, d ₅＞0.And the structure difference of each rete, then the thickness of each rete is also inequality, as: film is 1 the 3rd layer of 23d ₃At 5-30nm

Film is 2 the 3rd layer of 23d ₃At 40-80nm

Film is 3 the 3rd layer of 23d ₃At 5-30nm

Film is 4 the 3rd layer of 23d ₃At 40-80nm

Change in the scope, the thickness of other each layer film is changing in corresponding scope, can obtain the film article at the low reflectivity of visible region, reflectivity that infrared light region is high equally, helps the suitability for industrialized production of cladding glass like this.

Its result of the cladding glass that is obtained records reflectance curve as shown in Figure 2.

Transmittance graph as shown in Figure 3.

The visible region reflectance curve as shown in Figure 4.

The above results has proved the advantage of the no white light pollution that the present invention has.

Claims (6)

1, a kind of cladding glass that does not have white light pollution comprises substrate of glass (1) and is deposited on the lip-deep film of substrate (1) (2), it is characterized in that the structural order of concrete film (2) is:

[1], is deposited on the lip-deep the first layer film of substrate of glass (1) (21) and is specific refractory power greater than 2.0 metal oxide film by substrate of glass (1) beginning;

[2] being deposited on the lip-deep second layer film of above-mentioned the first layer film (21) (22) is the silicon oxide film of specific refractory power less than substrate of glass (1) specific refractory power;

[3] being deposited on above-mentioned second layer film (22) lip-deep three-layer thin-films (23) is greater than 70% rete to infrared reflectivity;

[4] to be deposited on above-mentioned three-layer thin-film (23) lip-deep four-level membranes (24) be specific refractory power greater than 2.0 metal oxide film;

[5] being deposited on the lip-deep layer 5 film of above-mentioned four-level membrane (24) (25) is the silicon oxide film of specific refractory power less than substrate of glass (1) specific refractory power.

2,, it is characterized in that specific refractory power is a titanium dioxide film greater than 2.0 metal oxide film according to a kind of cladding glass of claim 1.

3,, it is characterized in that specific refractory power is a silicon dioxide film less than the silicon oxide film of substrate of glass (1) specific refractory power according to a kind of cladding glass of claim 1.

4, according to a kind of cladding glass of claim 1, it is characterized in that be silver to infrared reflectivity greater than 70% film, or titanium nitride film.

5,, it is characterized in that being deposited on the thicknesses of layers (d of second layer film (22) on the first layer film (21) surface according to a kind of cladding glass of claim 1 ₂) be greater than or equal to 0.

6,, it is characterized in that being deposited on the thicknesses of layers (d of the surperficial upper film of substrate of glass (1) (21) according to a kind of cladding glass of claim 1 ₁), the thicknesses of layers (d of three-layer thin-film (23) ₃), the thicknesses of layers (d of four-level membrane (24) ₄), the thicknesses of layers (d of layer 5 film (25) ₅) all must be simultaneously greater than 0.

Images