JPH02160631A - Production of lens - Google Patents
Production of lensInfo
- Publication number
- JPH02160631A JPH02160631A JP31286588A JP31286588A JPH02160631A JP H02160631 A JPH02160631 A JP H02160631A JP 31286588 A JP31286588 A JP 31286588A JP 31286588 A JP31286588 A JP 31286588A JP H02160631 A JPH02160631 A JP H02160631A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- lens
- molds
- chalcogenide glass
- manufacturing
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 239000005387 chalcogenide glass Substances 0.000 claims abstract description 16
- 239000011521 glass Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 239000011261 inert gas Substances 0.000 claims abstract description 4
- 238000005452 bending Methods 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 7
- 230000009477 glass transition Effects 0.000 abstract description 2
- 238000005498 polishing Methods 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000000075 oxide glass Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/12—Cooling, heating, or insulating the plunger, the mould, or the glass-pressing machine; cooling or heating of the glass in the mould
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/80—Non-oxide glasses or glass-type compositions
- C03B2201/86—Chalcogenide glasses, i.e. S, Se or Te glasses
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、軟化点の低いカルコゲナイドガラスのレンズ
作製方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a chalcogenide glass lens having a low softening point.
［従来の技術］
赤外線透過性ガラスであるカルコゲナイドガラスは、そ
の光の透過領域が、他の酸化物系等のガラスに比べてよ
り長波長側にあるため、赤外線を利用するエネルギー伝
送、サーマルイメージセンサ−１分光分析等の分野で赤
外線透過用レンズとして注目されている。これらの分野
に使用するカルコゲナイドガラスレンズは、反射率が高
いため、光透過性や耐候性向上のために反射防止膜コー
ティングを施すが該レンズ表面の平滑化も重要である。[Prior art] Chalcogenide glass, which is an infrared-transmissive glass, has a light transmission region on the longer wavelength side compared to other oxide-based glasses, so it is suitable for energy transmission and thermal imaging using infrared rays. Sensor 1 It is attracting attention as a lens for transmitting infrared rays in fields such as spectroscopic analysis. Chalcogenide glass lenses used in these fields have high reflectance, so they are coated with an antireflection film to improve light transmittance and weather resistance, but it is also important to smooth the lens surface.
従来、レンズの作製は、塊ガラスから切り出したガラス
を研磨加工する方法や予めキャスティング法で大間かな
形を作製し、その後研磨加工する方法で作製している。Conventionally, lenses have been manufactured by polishing glass cut from a lump of glass, or by using a casting method to create a large shape in advance and then polishing it.
［発明が解決しようとする課題］
しかしながら、切り出し法やキャスティング法で作製し
たガラスの研磨によるレンズ作製では非常に多くの加工
工程を必要とし時間も要する。また、カルコゲナイドガ
ラスは、酸化物系ガラスに比べ柔らかいガラスであるた
め、研磨加工中にガラスの割れ等が発生し易く、光学的
に平滑な表面を有するレンズを作製することは非常に困
難である。しかも、研磨剤がカルコゲナイドガラスの表
面に刺さり込み、残り易いため、反射防止膜コーティン
グの際、膜の均質化に大きな影響を与える。[Problems to be Solved by the Invention] However, manufacturing a lens by polishing glass manufactured by a cutting method or a casting method requires a large number of processing steps and is time consuming. Furthermore, since chalcogenide glass is softer than oxide glass, it is more likely to break during polishing, making it extremely difficult to produce lenses with optically smooth surfaces. . Moreover, since the abrasive tends to penetrate and remain on the surface of chalcogenide glass, it has a great effect on the homogenization of the film during anti-reflection coating.
本発明は、上記の種々欠点を除去するためになされたも
のであり、カルコゲナイドガラスで表面の平滑度が高く
、しかも簡単なレンズの作製方法を提供することを目的
とするものである。The present invention was made in order to eliminate the various drawbacks mentioned above, and it is an object of the present invention to provide a simple method for manufacturing a lens made of chalcogenide glass and having a high surface smoothness.
［課題を解決するだめの手段］
上記に述べた問題点は、カルコゲナイドガラスの屈伏点
温度から軟化点温度に加熱された、石英ガラス製の型に
、該ガラスを挟み、押圧することによって解決される。[Means for Solving the Problems] The above-mentioned problems can be solved by sandwiching and pressing chalcogenide glass between quartz glass molds heated from the bending point temperature to the softening point temperature. Ru.
この際、金属製の型またはセラミック製の型も使用可能
である。In this case, metal molds or ceramic molds can also be used.
また、高い平滑度の面を有するレンズを作製するに当た
っては、光学的に研磨した面を有する石英ガラス製等の
型を用い、ごみ等のないクリーンな不活性ガス雰囲気下
で行う必要がある。Further, when manufacturing a lens having a highly smooth surface, it is necessary to use a mold made of quartz glass or the like having an optically polished surface and to perform the process in a clean inert gas atmosphere free from dust.
［実施例］
第１図に本発明法を実施するレンズ作製装置の一例を示
す。装置は、ゴミを取り除いたクリーンな不活性雰囲気
ガス中で操作し、基本的にガラスの屈伏点温度から軟化
点温度まで、加熱可能な光学研磨された表面を有する型
から成る。[Example] FIG. 1 shows an example of a lens manufacturing apparatus for carrying out the method of the present invention. The apparatus operates in a clean, dust-free inert atmosphere gas and essentially consists of a mold with an optically polished surface that can be heated from the yield point temperature to the softening point temperature of the glass.
例として、組成比がＧｅ２ｏＡＳ３ｏＳｅ３ｏ王ｅ２゜
（下添え数字は原子パーセントを表す）のカルコゲナイ
ドガラスを用い、石英ガラス製の凸形状型または凹形状
型を用いレンズを作製した。不活性なアルゴンガス雰囲
気下に置いたレンズ作製装置には、予め合成しておいた
該組成のカルコゲナイドガラスロンドから切り出したサ
ンプル１を、ピストン８の加熱ヒータ一部分２に固定し
た石英ガラス製の型３、および受は側シリンターフ上部
のヒータ一部分に固定した同質の型４の間に挨み、装着
した。その後１０℃／分で該ガラスの屈伏点温度２８３
℃まで、外部加熱ヒーター３および石英ガラス製の型３
．４を加熱し、屈伏点温度になった後、１０分間保持、
その後、さらにガラスの軟化点温度３８５℃まで、上記
のヒーターを徐々に加熱しながら押圧を行った。この際
、石英ガラス製の型３は、同質の型４に向い、レンズの
光軸方向に沿って移動する。軟化点温度に達した時の押
圧力は２０に９／ｄである。その後、押圧力を該ガラス
の屈伏点温度まで下がる闇に徐々に減圧した。さらに該
ガラスのガラス転移点温度２３０℃に冷えた時点から、
−昼夜かけ室温まで徐冷を行い、歪を取り去った。 上
記で述べた方法により、凸形状または凹形状のカルコゲ
ナイドガラスのレンズを作成したところ、きわめて良好
で光学的にきれいな面を有するレンズを作製することが
出来た。As an example, a lens was produced using a chalcogenide glass having a composition ratio of Ge2oAS3oSe3oO2° (subscript numbers represent atomic percentages) and using a convex or concave type made of quartz glass. A lens manufacturing device placed under an inert argon gas atmosphere is equipped with a quartz glass mold in which a sample 1 cut from a chalcogenide glass rond having the composition previously synthesized is fixed to a heater portion 2 of a piston 8. 3, and the receiver was installed between molds 4 of the same material fixed to a part of the heater on the upper part of the side cylinder turf. Thereafter, at 10°C/min, the yield point temperature of the glass was 283°C.
℃, external heating heater 3 and quartz glass mold 3
．． 4, and after reaching the yield point temperature, hold for 10 minutes,
Thereafter, pressing was performed while gradually heating the glass with the above-mentioned heater until the softening point temperature of the glass was 385°C. At this time, the mold 3 made of quartz glass faces the mold 4 of the same quality and moves along the optical axis direction of the lens. The pressing force when the softening point temperature is reached is 20/9/d. Thereafter, the pressing force was gradually reduced to a temperature lower than the yielding point of the glass. Furthermore, from the time when the glass has cooled to the glass transition temperature of 230°C,
- Slow cooling was performed day and night to room temperature to remove distortion. When a convex or concave chalcogenide glass lens was produced by the method described above, it was possible to produce a lens with an extremely good and optically clean surface.
［発明の効果］
以上説明したように、本発明によれば研磨法による従来
のレンズ作製方法に比べ、加工工程が非常に少なく、簡
単に平滑表面を有する赤外線用カルコゲナイドガラスレ
ンズを作成することができる。しかも、クリーンな不活
性ガス雰囲気中で行うため、レンズ作製中のガラスの表
面酸化及び雰囲気中のゴミによって生じるレンズ表面損
傷を防止することが可能である。[Effects of the Invention] As explained above, according to the present invention, an infrared chalcogenide glass lens having a smooth surface can be easily created with very few processing steps compared to the conventional lens manufacturing method using a polishing method. can. Moreover, since the process is carried out in a clean inert gas atmosphere, it is possible to prevent damage to the lens surface caused by surface oxidation of the glass during lens production and dust in the atmosphere.
４、ｉ品ａＩ し 成装置の概略図である。4. i-item aI death FIG.
Claims (1)
加熱されたガラス製の型に挟み押圧することを特徴とす
るレンズ作製方法。 ２、型の温度をカルコゲナイドガラスの屈伏点温度から
軟化点温度の間に保持することを特徴とする請求項１記
載のレンズ作製方法。 ３、レンズ作製の際の雰囲気をクリーンな不活性ガス雰
囲気とすることを特徴とする請求項１または２記載のレ
ンズ作製方法。[Claims] 1. A method for manufacturing a lens, which comprises sandwiching and pressing chalcogenide glass between heated glass molds having an optically polished surface. 2. The method for manufacturing a lens according to claim 1, wherein the temperature of the mold is maintained between the bending point temperature and the softening point temperature of the chalcogenide glass. 3. The lens manufacturing method according to claim 1 or 2, wherein the atmosphere during lens manufacturing is a clean inert gas atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63312865A JPH0777964B2 (en) | 1988-12-13 | 1988-12-13 | Lens making method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63312865A JPH0777964B2 (en) | 1988-12-13 | 1988-12-13 | Lens making method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02160631A true JPH02160631A (en) | 1990-06-20 |
| JPH0777964B2 JPH0777964B2 (en) | 1995-08-23 |
Family
ID=18034369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63312865A Expired - Lifetime JPH0777964B2 (en) | 1988-12-13 | 1988-12-13 | Lens making method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0777964B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5346523A (en) * | 1992-03-31 | 1994-09-13 | Matsushita Electric Industrial Co., Ltd. | Method of molding chalcogenide glass lenses |
| JP2003063835A (en) * | 2001-08-28 | 2003-03-05 | Fuji Photo Optical Co Ltd | Mold for forming optical element and method for manufacturing the same |
| WO2004039736A1 (en) * | 2002-10-29 | 2004-05-13 | Corning Incorporated | Low-temperature fabrication of glass optical components |
| JP2012201523A (en) * | 2011-03-24 | 2012-10-22 | Fujifilm Corp | Method for manufacturing infrared lens |
| CN103145319A (en) * | 2013-03-28 | 2013-06-12 | 湖北新华光信息材料有限公司 | Moulding press for chalcogenide glass components |
| WO2019235443A1 (en) * | 2018-06-04 | 2019-12-12 | Hoya株式会社 | Mold for molding glass lens |
| US11155487B2 (en) * | 2016-07-20 | 2021-10-26 | Nippon Electric Glass Co., Ltd. | Method for manufacturing infrared-transmissible lens, infrared-transmissible lens, and infrared camera |
| JP2022093460A (en) * | 2018-06-04 | 2022-06-23 | Hoya株式会社 | Glass lens molding die |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59116136A (en) * | 1982-12-20 | 1984-07-04 | Canon Inc | Manufacture of optical element |
| JPS61251529A (en) * | 1985-04-30 | 1986-11-08 | Olympus Optical Co Ltd | Method of high precision molding for glass optical part |
-
1988
- 1988-12-13 JP JP63312865A patent/JPH0777964B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59116136A (en) * | 1982-12-20 | 1984-07-04 | Canon Inc | Manufacture of optical element |
| JPS61251529A (en) * | 1985-04-30 | 1986-11-08 | Olympus Optical Co Ltd | Method of high precision molding for glass optical part |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5346523A (en) * | 1992-03-31 | 1994-09-13 | Matsushita Electric Industrial Co., Ltd. | Method of molding chalcogenide glass lenses |
| JP2003063835A (en) * | 2001-08-28 | 2003-03-05 | Fuji Photo Optical Co Ltd | Mold for forming optical element and method for manufacturing the same |
| JP4825421B2 (en) * | 2002-10-29 | 2011-11-30 | コーニング インコーポレイテッド | Low temperature production of glass optical components |
| JP2006504609A (en) * | 2002-10-29 | 2006-02-09 | コーニング・インコーポレーテッド | Low temperature production of glass optical components |
| US7143609B2 (en) | 2002-10-29 | 2006-12-05 | Corning Incorporated | Low-temperature fabrication of glass optical components |
| JP2011093801A (en) * | 2002-10-29 | 2011-05-12 | Corning Inc | Low-temperature fabrication of glass optical component |
| WO2004039736A1 (en) * | 2002-10-29 | 2004-05-13 | Corning Incorporated | Low-temperature fabrication of glass optical components |
| JP2012201523A (en) * | 2011-03-24 | 2012-10-22 | Fujifilm Corp | Method for manufacturing infrared lens |
| CN103145319A (en) * | 2013-03-28 | 2013-06-12 | 湖北新华光信息材料有限公司 | Moulding press for chalcogenide glass components |
| US11155487B2 (en) * | 2016-07-20 | 2021-10-26 | Nippon Electric Glass Co., Ltd. | Method for manufacturing infrared-transmissible lens, infrared-transmissible lens, and infrared camera |
| WO2019235443A1 (en) * | 2018-06-04 | 2019-12-12 | Hoya株式会社 | Mold for molding glass lens |
| JP2019210176A (en) * | 2018-06-04 | 2019-12-12 | Hoya株式会社 | Glass lens molding tool |
| CN112218832A (en) * | 2018-06-04 | 2021-01-12 | Hoya株式会社 | Glass lens forming die |
| JP2022093460A (en) * | 2018-06-04 | 2022-06-23 | Hoya株式会社 | Glass lens molding die |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0777964B2 (en) | 1995-08-23 |
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