CN1016104B - The corrosion protection double layer antireflection coating - Google Patents
The corrosion protection double layer antireflection coatingInfo
- Publication number
- CN1016104B CN1016104B CN89106212A CN89106212A CN1016104B CN 1016104 B CN1016104 B CN 1016104B CN 89106212 A CN89106212 A CN 89106212A CN 89106212 A CN89106212 A CN 89106212A CN 1016104 B CN1016104 B CN 1016104B
- Authority
- CN
- China
- Prior art keywords
- hfo
- double layer
- antireflection coating
- corrosion protection
- layer antireflection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
The invention discloses a kind of corrosion protection double layer antireflection coating, it is characterized in that adopting HfO
2Or Y
2O
3Or the HfO of 94-80% weight ratio
2Y with the 6-20% weight ratio
2O
3Double-layer reflection reducing coating as high index of refraction.Adopt the present invention to avoid and contain Pb, Ba, the optical glass generation chemical reaction of Cd composition and to corrode rete hard firmly, optical characteristics is stable, good reproducibility, preparation technology is simple, transplants HfO easily
2, Y
2O
3Inexpensive being easy to of material obtains from market.
Description
The present invention relates to the double-layer reflection reducing coating in the optics, relate in particular to the corrosion protection double layer antireflection coating.
Any optics and laser device all be unable to do without antireflecting film.Otherwise will be low because of seeing through luminous energy, background stray light can't work instrument by force.
Traditional antireflecting film all is individual layer MgF
2, its efficiency ratio is lower, and refractive index is 1.52 KK
9Glass, the single face reflectivity can only drop to about 1.8% from 4.2% at visible region.Therefore, in the last few years, required to replace monofilm, because they can make the residual reflectivity of visible region be reduced to below 0.3% with bilayer or multilayer film.
The oxidation film of antireflecting film internal layer high index of refraction commonly used is (as ZrO
2, TiO
2, Ta
2O
3Deng), but chemical reaction can take place with the optical glass (comprising most glass such as BaK, ZK, LaK, KF, QF, F, BaF, ZBaF, ZF) that contains Pb, Cd, Ba in these materials.As refractive index is that 1.9 material utilizes ZrO usually
2, often select TiO for use and refractive index is 2.3 material
2And Ta
2O
3These materials can decompose in the heating evaporation process, thereby exist metallic ion or low oxide ion in rete, and the Pb in these ions and the glass, Cd, Ba plasma exchange, and with airborne steam, CO
2Generate acid carbonate compound or alkaline hydrated oxide Deng reaction, make glass produce corrosion and devitrification.
The objective of the invention is provides a kind of anticorrosion double layer antireflection coating for overcoming above-mentioned corrosion phenomenon, has avoided the devitrification phenomenon of glass under the prerequisite that does not increase any process complexity, thereby obtains the high-quality antireflecting film of low reflection.
Feature of the present invention is: to containing Pb, Ba, the dominant inorganic optical glass employing HfO of Cd composition
2Or Y
2O
3Or the HfO of 94-80% weight ratio
2Y with the 6-20% weight ratio
2O
3Double layer antireflection coating as high index of refraction.These materials are the high temperature hot-pressed material, and purity is better than 99%.
The film system design of double layer antireflection coating is ground floor half-wavelength (λ on glass often
2/ 2) high-index material of thickness and 1/4 wavelength (λ
0/ 4) low-index material of thickness, its refractive index is respectively 1.9 and 1.38.Perhaps adopt any thickness film system, the ground floor high refractive index film on glass and the thickness of second layer low refractive index film become with glass refraction, and its refractive index is respectively 2.3 and 1.38.Blackish green for reflected colour is repeated, second layer λ
0/ 4 films adopt SiO
2And MgF
2Synthetic film, its thickness ratio is about 1: 2, makes the protruding peak, centre of W type curve be controlled at reflectivity about 0.6%.Because contain the glass of Pb, Ba, Cd composition, its refractive index is generally all than higher, so generally just can satisfy the antireflection requirement with duplicature.
The preparation process of plated film is as follows: with glass alcohol, the ether cleaning is dried, and puts into vacuum chamber and bleeds.And glass baking is heated to 180 ℃, when vacuum tightness reaches 2 * 10
-5During torr, to HfO
2Or Y
2O
3Or HfO
2With Y
2O
3Compound carries out degasification.Electron gun degasification power is: voltage 5.5KV, electric current rises to 100mA gradually from 20mA, and makes vacuum tightness be not less than 5 * 10
-5Torr.Get final product start vaporizer after the degasification, evaporation power is: voltage 5.8KW, electric current 100mA.Deposition rate is monitored with the quartz crystal frequency meter.And maintain in 3～4A/S scope.Plating the thick HfO of half-wave
2Behind the film, increase heating power,, then evaporate SiO about glass heats to 230 ℃
2, deposition rate is 4nm/S, deposition thickness is 1/3 * 1/4 λ
0, continue evaporation MgF then
2With the material fritting, after treating to fuse fully, opening the baffle controls deposition rate is 5nm/S, and supplies thickness to 1/4 λ with the molybdenum boat resistance heated
0
Facts have proved the glass kind that contains Pb, Ba, Cd: PK
2, BaK
1-9, ZK
1-20, LaK
1-3, KF
1-3, QF
1-5, F
1-13, TF
3, BaK
1-8, ZBaF
1-5, ZF
1-7, all can not use ZrO
2, TiO
2And Ta
2O
5, must adopt HfO
2Or Y
2O
3Or HfO
2Or Y
2O
3Compound as the double layer antireflection coating of high index of refraction.
The double layer antireflection coating that adopts the present invention to be coated with can be avoided sending out mist with the optical glass generation chemical reaction that contains Pb, Ba, Cd composition, and rete is hard firmly, and optical characteristics is stable, and good reproducibility is avoided ZrO
2Refractive index inhomogeneity and make the shortcoming of rete characteristic variation, preparation technology is simple, transplants HfO easily
2, Y
2O
3Inexpensive being easy to of material obtains from market.
Claims (2)
1, a kind of corrosion protection double layer antireflection coating is to be made of ground floor high-index material on glass and second layer low-index material, it is characterized in that containing Pb, Ba, the dominant optics unorganic glass employing of Cd composition HfO
2Or Y
2O
3Or HfO
2With Y
2O
3Compound as the double layer antireflection coating of high index of refraction.
2, a kind of corrosion protection double layer antireflection coating according to claim 1 is characterized in that said HfO
2With Y
2O
3Compound be the HfO of 94-80% weight ratio
2Y with the 6-20% weight ratio
2O
3Compound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89106212A CN1016104B (en) | 1989-07-25 | 1989-07-25 | The corrosion protection double layer antireflection coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89106212A CN1016104B (en) | 1989-07-25 | 1989-07-25 | The corrosion protection double layer antireflection coating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1049059A CN1049059A (en) | 1991-02-06 |
| CN1016104B true CN1016104B (en) | 1992-04-01 |
Family
ID=4856671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89106212A Expired CN1016104B (en) | 1989-07-25 | 1989-07-25 | The corrosion protection double layer antireflection coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1016104B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4926504B2 (en) * | 2006-03-08 | 2012-05-09 | 浜松ホトニクス株式会社 | Photocathode, electron tube provided with the photocathode, and method for producing photocathode |
| CN100447583C (en) * | 2007-03-30 | 2008-12-31 | 厦门大学 | Double-layer anti-reflection film for ultraviolet detector and its preparation method |
| CN110359016A (en) * | 2019-03-19 | 2019-10-22 | 长春理工大学 | A kind of high-reflecting film and preparation method thereof |
-
1989
- 1989-07-25 CN CN89106212A patent/CN1016104B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1049059A (en) | 1991-02-06 |
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Legal Events
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |