WO2012049888A1 - 光学部品 - Google Patents
光学部品 Download PDFInfo
- Publication number
- WO2012049888A1 WO2012049888A1 PCT/JP2011/064012 JP2011064012W WO2012049888A1 WO 2012049888 A1 WO2012049888 A1 WO 2012049888A1 JP 2011064012 W JP2011064012 W JP 2011064012W WO 2012049888 A1 WO2012049888 A1 WO 2012049888A1
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- WIPO (PCT)
- Prior art keywords
- optical component
- layer
- refractive index
- index layer
- substrate
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/113—Anti-reflection coatings using inorganic layer materials only
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/113—Anti-reflection coatings using inorganic layer materials only
- G02B1/115—Multilayers
Definitions
- the present invention relates to an optical component having an infrared antireflective film on the surface of a substrate.
- an infrared transmitting member such as ZnSe, ZnS, GaAs, or Ge is used as a substrate (base material), and PbF 2 or BaF is formed on this substrate.
- a structure which has an infrared reflective anti-reflective film combining a low refractive index layer consisting of fluoride such as 2 , LaF 3 , CeF 3 , ThF 4 and a high refractive index layer such as ZnSe, ZnS, GaAs, Ge etc. ing.
- ThF 4 is known as a material that satisfies such characteristics.
- ThF 4 is radioactive, it is harmful to the human body and has problems such as limitations in handling.
- Patent Document 1 proposes an optical component using BaF 2 for the low refractive index layer and ZnSe for the high refractive index layer.
- Patent Document 1 By adopting the structure as in Patent Document 1, it is possible to manufacture an optical component having a low absorptivity of laser light without using a radioactive substance such as ThF 4 .
- a radioactive substance such as ThF 4 .
- the surface roughness of the infrared antireflection film is worse than when ThF 4 is used. There is a problem that the appearance of the optical component is deteriorated.
- the present invention has been made based on such circumstances, and it is an optical component having an infrared reflective film having a low absorptivity of laser light and a good appearance quality even without using the radioactive substance ThF 4 Intended to provide.
- the optical component of the present invention is an optical component comprising a substrate and an infrared antireflective film, wherein the substrate comprises ZnSe and is formed on at least one surface of the substrate.
- the infrared antireflection film is formed of a low refractive index layer mainly composed of BaF 2 , a high refractive index layer mainly composed of ZnSe, ZnS or Ge, and an intermediate layer composed of a material having an amorphous or anisotropic property.
- an optical component has the characteristics that surface roughness Ra is 3 nm or less.
- the optical component of the present invention preferably has an absorptivity of 0.25% or less at a wavelength of 10.6 ⁇ m, and an absorptivity of 0.18% to 0.24 at a wavelength of 10.6 ⁇ m. It is further preferable that the content is less than or equal to%.
- the intermediate layer of the optical component of the present invention is a layer consisting of one or more kinds of fluorides selected from the group consisting of lanthanoid fluorides, PbF 2 and YF 3 , or one or more kinds of fluorines selected from these groups It is preferable that the layer be a solid solution containing a fluoride and BaF 2 .
- the intermediate layer is preferably formed between the high refractive index layer and the low refractive index layer, between the low refractive index layer and the substrate, or both.
- the inventor examined the problems of the optical component disclosed in Patent Document 1. As a result, it was found that asperities of crystal grains present on the surface of the polycrystalline ZnSe substrate were transferred or amplified to the BaF 2 layer and transferred. It was also found that clear crystallinity appeared in the BaF 2 layer. From these facts, the inventor considered that the unevenness generated in the BaF 2 layer affects the surface of the optical component, leading to the deterioration of the appearance quality of the optical component.
- the inventor of the present invention has found that the upper or lower surface of the low refractive index layer 2 has a layer which has infrared transparency and is amorphous or anisotropic. We have found that it should be formed. That is, the optical component of the present invention is characterized in that it comprises an intermediate layer 4 having amorphous or anisotropy separately from the low refractive index layer 2 made of BaF 2 .
- FIG. 1 schematically shows a cross-sectional view of the optical component of the present invention.
- Optical component of the present invention includes a substrate 1 made of ZnSe, mainly BaF 2 low refractive index layer 2 formed of, ZnSe, high refractive index layer 3 made of ZnS or Ge, and has an amorphous or anisotropic (crystal clear It has an infrared antireflective film 5 provided with an intermediate layer 4 (without orientation).
- mainly with consists BaF 2 layer, as described above, if the extent that when deposited on the ZnSe substrate crystallinity of ZnSe substrate from being reflected in the layer contains a different material other than BaF 2 Is meant to include.
- the layer is made of a fluoride having high infrared transmission performance (except for BaF 2 ), or a solid solution of BaF 2 and a fluoride other than BaF 2 .
- These fluorides may contain two or more different materials.
- fluorides of lanthanoids such as YbF 3 and DyF 3 , YF 3 , PbF 2 and the like are preferable as well as excluding ThF 4 .
- an amorphous layer can be formed even with an oxide such as TiO 2 , it is difficult to set the absorptivity at a wavelength of 10.6 ⁇ m to 0.25% or less.
- the intermediate layer 4 may be formed as a first intermediate layer between the low refractive index layer and the substrate.
- the thickness thereof may be such that the unevenness of the surface of the ZnSe substrate is not transferred.
- the thickness of the intermediate layer is preferably 1000 nm or less, and more preferably 100 nm or less.
- the unevenness on the surface of the ZnSe substrate is not transferred to the surface of the infrared antireflective film, so the surface of the infrared antireflective film can be smoothed.
- the surface roughness Ra of the infrared antireflective film can be 3 nm or less.
- the intermediate layer is formed of two layers, a first intermediate layer formed between the low refractive index layer and the substrate, and a second intermediate layer formed between the high refractive index layer and the low refractive index layer.
- the first intermediate layer is formed separately, it is preferable to reduce the thickness of the first intermediate layer, specifically 10 nm or more and 100 nm or less.
- a low refractive index layer 2 composed of the above and a high refractive index layer 3 composed of ZnSe were sequentially laminated from the base material side to prepare an optical component having the infrared antireflection films 5 on both sides.
- Each film was formed by electron beam (EB) evaporation under conditions of a vacuum degree of 8 ⁇ 10 ⁇ 4 Pa or less and an evaporation rate of 0.03 ⁇ m / min.
- EB electron beam
- the infrared absorptivity was measured by a laser calorimetry method using a CO 2 laser beam having a wavelength of 10.6 ⁇ m.
- the surface roughness was measured by a non-contact profilometer NewView 200 manufactured by Zygo.
- Example number 4 which only changed the low-refractive-index layer from ThF 4 to BaF 2 differs in the absorptivity of a laser beam from the thing (sample number 3) whose low-refractive-index layer is ThF 4 . Therefore, the amount of change in substrate refractive index and the amount of thermal deformation that occur as a result of substrate temperature rise due to absorption of laser light differ, causing a shift in focus position, and compatibility with conventional optical components using ThF 4 is obtained. I can not. In contrast, a structure of the present invention (Sample No.
- the intermediate layer by the presence of the intermediate layer, it is also possible to adjust the laser beam absorption rate to that of the low refractive index layer was ThF 4, the ThF 4 It is also possible to obtain compatibility with the used optical components.
- the absorptivity of the laser beam can be adjusted by changing the thickness of the intermediate layer.
- Example 2 Under the same conditions as Example 1, the film material and its thickness were changed, and the absorptivity of the laser beam and the surface roughness were evaluated. The results are shown in Tables 2 to 6.
- Sample No. 21 has the intermediate layer formed only between the high refractive index layer and the low refractive index layer (second intermediate layer), but the thickness of the intermediate layer is relatively large. , The surface roughness has been improved only a little. Therefore, it is understood that in order to improve the surface roughness, it is preferable to provide an intermediate layer between the low refractive index layer and the substrate (first intermediate layer).
- the present invention is particularly suitable for optical components used for high power lasers such as CO 2 lasers.
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Surface Treatment Of Optical Elements (AREA)
- Physical Vapour Deposition (AREA)
- Laminated Bodies (AREA)
Abstract
Description
2 低屈折率層
3 高屈折率層
4 中間層
5 赤外反射防止膜
Claims (8)
- 基材と赤外反射防止膜とからなる光学部品であって、
前記基材はZnSeであり、
前記赤外反射防止膜は、前記基板の少なくとも一面に形成されているとともに、
主としてBaF2からなる低屈折率層と、
ZnSe、ZnSもしくはGeからなる高屈折率層と、
アモルファスもしくは異方性を有する材料からなる中間層からなり、
前記赤外反射防止膜の表面粗さRaが3nm以下であることを特徴とする光学部品。 - 波長10.6μmにおける吸収率が0.25%以下である請求項1に記載の光学部品。
- 波長10.6μmにおける吸収率が0.18%以上0.24%以下である請求項1または2に記載の光学部品。
- 前記中間層はランタノイドのフッ化物、PbF2、YF3からなる群から選ばれる一種類以上のフッ化物からなる層、またはこれらの群から選ばれる一種類以上のフッ化物とBaF2とを含む固溶体からなる層である請求項1~3いずれかに記載の光学部品。
- 前記中間層は、低屈折率層と基板との間に形成された第1の中間層である請求項1~4のいずれかに記載の光学部品。
- 前記第1の中間層の厚みは、10nm以上である請求項5に記載の光学部品。
- 前記第1の中間層の厚みは、1000nm以下である請求項5に記載の光学部品。
- 前記中間層は、高屈折率層と低屈折率層との間に形成された第2の中間層をさらに含み、前記第1の中間層の厚みが10nm以上100nm以下である請求項7に記載の光学部品。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/634,228 US9188706B2 (en) | 2010-10-12 | 2011-06-20 | Optical element |
KR1020127024202A KR101470718B1 (ko) | 2010-10-12 | 2011-06-20 | 광학 부품 |
CN201180013633.0A CN102812386B (zh) | 2010-10-12 | 2011-06-20 | 光学元件 |
EP11832330.2A EP2535745B1 (en) | 2010-10-12 | 2011-06-20 | Optical component |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010229516A JP5854347B2 (ja) | 2009-12-23 | 2010-10-12 | 光学部品 |
JP2010-229516 | 2010-10-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012049888A1 true WO2012049888A1 (ja) | 2012-04-19 |
Family
ID=45939055
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/064012 WO2012049888A1 (ja) | 2010-10-12 | 2011-06-20 | 光学部品 |
Country Status (7)
Country | Link |
---|---|
US (1) | US9188706B2 (ja) |
EP (1) | EP2535745B1 (ja) |
JP (1) | JP5854347B2 (ja) |
KR (1) | KR101470718B1 (ja) |
CN (1) | CN102812386B (ja) |
TW (1) | TWI525335B (ja) |
WO (1) | WO2012049888A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104459835B (zh) * | 2014-12-24 | 2016-06-29 | 南京波长光电科技股份有限公司 | 一种红外玻璃gasir1增透膜及其制备方法 |
KR102569079B1 (ko) * | 2017-04-20 | 2023-08-22 | 신에쓰 가가꾸 고교 가부시끼가이샤 | 반사방지 부재 및 그 제조 방법 |
JP6873283B2 (ja) * | 2018-01-25 | 2021-05-19 | 三菱電機株式会社 | 光学部品及びレーザ加工機 |
CN110146943B (zh) * | 2018-12-20 | 2021-03-23 | 上海欧菲尔光电技术有限公司 | 一种硅基底中波红外增透膜及其制备方法 |
CN111090134B (zh) * | 2019-11-21 | 2022-03-29 | 天津津航技术物理研究所 | 硫系玻璃基底激光、中波红外、长波红外复合减反射薄膜 |
Citations (6)
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JPS63294501A (ja) * | 1987-05-27 | 1988-12-01 | Nikon Corp | 赤外用光学薄膜 |
JPH06313802A (ja) * | 1993-04-28 | 1994-11-08 | Topcon Corp | 赤外域多層膜 |
JP2000019305A (ja) * | 1998-07-03 | 2000-01-21 | Minolta Co Ltd | 赤外反射防止膜 |
JP2000147205A (ja) * | 1998-11-06 | 2000-05-26 | Minolta Co Ltd | 赤外反射防止膜 |
JP2002148407A (ja) | 2000-11-14 | 2002-05-22 | Sumitomo Electric Ind Ltd | 赤外線レーザ用光学部品とその製造方法 |
JP2008032804A (ja) * | 2006-07-26 | 2008-02-14 | Jasco Corp | 光学素子 |
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JP3249992B2 (ja) * | 1990-12-25 | 2002-01-28 | ミノルタ株式会社 | シリコン基板またはゲルマニウム基板用反射防止膜 |
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-
2010
- 2010-10-12 JP JP2010229516A patent/JP5854347B2/ja active Active
-
2011
- 2011-06-20 CN CN201180013633.0A patent/CN102812386B/zh active Active
- 2011-06-20 US US13/634,228 patent/US9188706B2/en active Active
- 2011-06-20 WO PCT/JP2011/064012 patent/WO2012049888A1/ja active Application Filing
- 2011-06-20 KR KR1020127024202A patent/KR101470718B1/ko active IP Right Grant
- 2011-06-20 EP EP11832330.2A patent/EP2535745B1/en active Active
- 2011-06-23 TW TW100122067A patent/TWI525335B/zh not_active IP Right Cessation
Patent Citations (6)
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JPS63294501A (ja) * | 1987-05-27 | 1988-12-01 | Nikon Corp | 赤外用光学薄膜 |
JPH06313802A (ja) * | 1993-04-28 | 1994-11-08 | Topcon Corp | 赤外域多層膜 |
JP2000019305A (ja) * | 1998-07-03 | 2000-01-21 | Minolta Co Ltd | 赤外反射防止膜 |
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JP2008032804A (ja) * | 2006-07-26 | 2008-02-14 | Jasco Corp | 光学素子 |
Also Published As
Publication number | Publication date |
---|---|
EP2535745B1 (en) | 2019-06-19 |
EP2535745A4 (en) | 2017-10-04 |
JP5854347B2 (ja) | 2016-02-09 |
JP2011150286A (ja) | 2011-08-04 |
TW201215909A (en) | 2012-04-16 |
TWI525335B (zh) | 2016-03-11 |
KR20120135255A (ko) | 2012-12-12 |
CN102812386A (zh) | 2012-12-05 |
US20130016425A1 (en) | 2013-01-17 |
US9188706B2 (en) | 2015-11-17 |
EP2535745A1 (en) | 2012-12-19 |
CN102812386B (zh) | 2014-09-24 |
KR101470718B1 (ko) | 2014-12-08 |
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