JPS63252931A - Production of nonspherical surface lens - Google Patents
Production of nonspherical surface lensInfo
- Publication number
- JPS63252931A JPS63252931A JP8584287A JP8584287A JPS63252931A JP S63252931 A JPS63252931 A JP S63252931A JP 8584287 A JP8584287 A JP 8584287A JP 8584287 A JP8584287 A JP 8584287A JP S63252931 A JPS63252931 A JP S63252931A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- lead
- molten
- nonspherical
- molten lead
- 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 description 7
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 28
- 210000004127 vitreous body Anatomy 0.000 claims description 7
- 230000005484 gravity Effects 0.000 abstract description 11
- 239000011521 glass Substances 0.000 abstract description 9
- 239000006060 molten glass Substances 0.000 abstract description 7
- 230000001133 acceleration Effects 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 229910001120 nichrome Inorganic materials 0.000 abstract description 3
- 239000000155 melt Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 16
- 239000003795 chemical substances by application Substances 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B18/00—Shaping glass in contact with the surface of a liquid
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/04—Other methods of shaping glass by centrifuging
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Glass Compositions (AREA)
Abstract
Description
【発明の詳細な説明】 イ)産業上の利用分野 本発明は、非球面レンズの製法に関する一提案である。[Detailed description of the invention] b) Industrial application field The present invention is a proposal regarding a method for manufacturing an aspherical lens.
より詳細には、溶融鉛液を炉と共に所要角速度により回
転することにより鉛液面に非球面状の回転面を成形せし
め、該回転面を一定に保ちつつ炉を継続回転せしめ、こ
の回転面に溶融硝子液を流し込み、鉛液の非球面と同一
の非球面状硝子体を求めようとするものである。More specifically, by rotating the molten lead liquid together with the furnace at a required angular velocity, an aspherical rotating surface is formed on the surface of the lead liquid, and the furnace is continuously rotated while keeping the rotating surface constant. The aim is to pour molten glass liquid into the glass to obtain an aspherical vitreous body that is identical to the aspherical surface of the lead liquid.
口)従来の技術
従来、非球面レンズを求める方法としては、(1)プレ
ス方法、(2)切削方法、(3)成形型方法がある。(1) Prior Art Conventionally, methods for obtaining an aspherical lens include (1) a pressing method, (2) a cutting method, and (3) a molding method.
プレス方法とは、例えば、探照灯の如き非球面状の金属
板表面に肉薄の硝子をプレスする方法であり、切削方法
とは、ダイヤモンドにより硝子体を非球面状に切削する
方法であり、成形型方法とは、非球面状の成形型に硝子
液を流し込み、冷却固化する方法である。The pressing method is a method in which thin glass is pressed onto the surface of an aspherical metal plate such as a searchlight, and the cutting method is a method in which the vitreous body is cut into an aspherical shape using a diamond. The method is to pour glass liquid into an aspherical mold and cool it to solidify it.
ハ)発明が解決しようとする問題点
上記の如き従来技術の非球面レンズの製法は何れも非球
面それ自体の加工が一般の球面レンズに比較して極めて
至難であった。C) Problems to be Solved by the Invention In all of the prior art methods for manufacturing aspherical lenses as described above, processing of the aspherical surface itself is extremely difficult compared to that of general spherical lenses.
本発明の非球面レンズの製法は、従来の非球面の求め方
とは発想を全く異にして、簡易に非球面レンズを求める
ことに成功したものである。The method for manufacturing an aspherical lens of the present invention is completely different from the conventional method of determining an aspherical surface, and has succeeded in easily determining an aspherical lens.
本発明方法は上記従来技術のそれと比較した場合、強い
て位置付ければ、成形型方法に類するものと云うことが
できる。When the method of the present invention is compared with that of the above-mentioned prior art, it can be said that it is similar to the mold method.
二)問題点を解決するための手段
本発明は、炉により溶融された鉛液を炉と共に所要角速
度により回転することにより鉛液面に生ずる非球面状の
回転面を一定に保ちつつ炉の回転を継続し、非球面状の
回転面に溶融硝子液を流し込み、炉を冷却することによ
り鉛面と同一の非球面状の硝子体を求めることを特徴と
する非球面レンズの製法。2) Means for Solving the Problems The present invention rotates the lead liquid melted in the furnace at a required angular velocity together with the furnace, thereby causing the furnace to rotate while keeping the aspherical rotating surface formed on the surface of the lead liquid constant. A method for producing an aspheric lens, which is characterized by continuing the process, pouring molten glass liquid onto an aspheric rotating surface, and cooling the furnace to obtain an aspheric vitreous body that is the same as a lead surface.
としたものである。That is.
ホ)作用
本発明は、上記の如く構成されるものであるから、非球
面は炉に溶融された鉛液を炉と共に所要角速度により回
転することにより鉛液面に生ずる球面状の回転面により
成形されるものである。E) Function Since the present invention is constructed as described above, the aspherical surface is formed by a spherical rotating surface generated on the lead liquid surface by rotating the lead liquid melted in the furnace at the required angular velocity together with the furnace. It is something that will be done.
該回転面の形状を一定に保ちつつ炉を回転し続け、該非
球面の回転面に溶融硝子液を流し込み、硝子液を非球面
状回転面の回転により、該形状と同一非球面状の硝子体
を成形する。The furnace continues to rotate while keeping the shape of the rotating surface constant, and molten vitreous liquid is poured onto the aspherical rotating surface, and the vitreous liquid is transformed into an aspherical vitreous body having the same shape as the aspherical rotating surface. to form.
すなわち、鉛の比重は11.23で、硝子(光学用)の
比重は2.37であるから、両者は比重差により鉛液上
に硝子液が位置しても混合することなく夫々同一非球面
を呈し、炉を徐々に冷却することにより鉛の成形型によ
り非球面状の硝子体が収得できるものである。In other words, the specific gravity of lead is 11.23, and the specific gravity of glass (for optical use) is 2.37, so even if the vitreous solution is placed on top of the lead solution, they will not mix due to the difference in specific gravity, and each will have the same aspherical surface. By gradually cooling the furnace, an aspherical vitreous body can be obtained using a lead mold.
へ)実施例
本発明に使用される炉(1)は有底円筒形で、周囲に炉
体を加熱するニクロム線(2)が巻きつけられてなる電
気炉であり、炉の中央には軸(3)が取付けられ、該軸
(3)は所要回転機構(4)により回転自在に装着され
である。f) Example The furnace (1) used in the present invention is an electric furnace having a cylindrical shape with a bottom and a nichrome wire (2) for heating the furnace body wrapped around it, and a shaft in the center of the furnace. (3) is attached, and the shaft (3) is rotatably mounted by a required rotation mechanism (4).
尚、図示しないが、回転機構(4)にはNC制御回路が
組み込まれてあり、炉体(1)を水平線(x)に対し軸
(3)を縦軸(y)として角速度(ω)が加わった場合
、バランス良く正確に回転可能なように構成されるもの
である。Although not shown, an NC control circuit is incorporated in the rotation mechanism (4), and the angular velocity (ω) of the furnace body (1) is set relative to the horizontal line (x) and the axis (3) is the vertical axis (y). The structure is such that it can be rotated accurately and in a well-balanced manner.
すなわち、第3図に示す如く、y=Kx”Kは角速度(
ω) (rad/s)と溶融金属の比重(r)の関数と
なる。That is, as shown in Figure 3, y=Kx''K is the angular velocity (
ω) (rad/s) and the specific gravity (r) of the molten metal.
上記炉体(1)には鉛(AG)が収容され、ニクロム線
に通電し、炉体を加熱することにより炉体内において鉛
(八G)を溶融し、該鉛液を炉体と共に回転機構(4)
により軸(3)を介して角速度(ω)により回転するも
のである。Lead (AG) is housed in the furnace body (1), the lead (AG) is melted in the furnace body by applying electricity to the nichrome wire and heating the furnace body, and the lead liquid is transferred together with the furnace body through a rotating mechanism. (4)
It rotates at an angular velocity (ω) via the shaft (3).
この回転により鉛液表面には(ω)の数値により所要非
球面状の回転面が形成されるものである。Due to this rotation, a required aspheric surface of rotation is formed on the surface of the lead solution according to the value of (ω).
該非球面状の回転面の形状を一定に保ちつつ炉体は回転
を継続するものであり、この回転は極めて静粛に行われ
、液面に波立ち等を生ずることのないようにNC回路に
よりコントロールされるものである。The furnace body continues to rotate while keeping the shape of the aspherical rotating surface constant, and this rotation is performed extremely quietly and is controlled by an NC circuit to prevent ripples on the liquid surface. It is something that
上記非球面状の回転面は一種の成形型として使用するも
のであり、該回転面には電気炉(6)よりの溶融硝子液
(S)を導管(5)により流し込み、該硝子液(S)と
鉛液(AG)とは夫々比重差が相違し、鉛の比重が大で
あるから、硝子液は鉛液の回転面により硝子法全体が鉛
液の回転面と同形の非球面状態を成形し、炉体を回転し
ながら徐々に冷却すると、鉛液は非球面状の回転面のま
ま固化し、叉、硝子液も同様に固化し、この固化により
鉛の型面より非球面状硝子体を収得し、これをそのまま
非球面レンズとして使用するか、又は硝子体の裏側にA
Cメッキを施して反射鏡として使用するものである。The aspherical rotating surface is used as a type of mold, and the molten glass liquid (S) from the electric furnace (6) is poured into the rotating surface through the conduit (5). ) and lead solution (AG) have different specific gravity, and since the specific gravity of lead is large, the glass solution has an aspherical state in which the entire glass method has the same shape as the rotation surface of the lead solution due to the rotation surface of the lead solution. When molded and gradually cooled while rotating the furnace body, the lead liquid solidifies with the aspheric rotating surface, and the glass liquid also solidifies in the same way. Either you can use it as is as an aspherical lens, or you can put an A on the back side of the vitreous.
It is coated with C plating and used as a reflecting mirror.
上記実施に際し最も重要な点は、炉体を所要角速度によ
り回転し、所要形状の非球面状回転面を鉛液面に成形し
、これが形状を一定に保ちつつ回転を継続することと、
鉛液の非球面状回転面に流し込まれた硝子液と同時に液
より固体に冷却する工程である。The most important point in implementing the above is to rotate the furnace body at the required angular velocity, form an aspherical rotating surface of the desired shape on the lead liquid surface, and continue rotating while keeping the shape constant.
This is a process in which the lead liquid is cooled from a liquid to a solid at the same time as the glass liquid is poured onto the aspherical rotating surface.
上記実施の態様を更に具体的数値を示して説明する。The above embodiment will be further explained by showing specific numerical values.
第4図に示す如く、直径dの炉に、鉛液を深さHoだけ
入れておく。As shown in FIG. 4, a lead solution is poured to a depth Ho into a furnace having a diameter d.
第5図に示す如く、炉を角速度ω(radian/秒)
で回転すると、できる曲面の任意縦軸断面上の曲線式は
次のように表せる。As shown in Figure 5, the furnace is moved at an angular velocity ω (radian/second)
When rotated by , the curve equation on any vertical axis section of the resulting curved surface can be expressed as follows.
g ここで g:重力の加速度。g Here, g: acceleration of gravity.
従って曲線は放物線(非球面)となる。Therefore, the curve becomes a parabola (aspherical surface).
これは理論的に正確なもので、液の比重や、粘性や、表
面張力の影響はない。This is theoretically accurate and is not affected by the specific gravity, viscosity, or surface tension of the liquid.
但し、一定の回転数が保持され、流れは定常状態を保持
しなければならない。However, a constant rotational speed must be maintained and the flow must be maintained in a steady state.
波立ちや加速、減速や振動が存在してはならない。There should be no ripples, accelerations, decelerations or vibrations.
第5図に示す近傍は、液体と炉壁間に表面張力が働くた
め、放物線から狂う、それ故、この近傍まで溶融硝子液
を満たすと非球面レンズとして誤差を生ずるので、中央
付近のみを使用する。The area shown in Figure 5 deviates from the parabola due to the surface tension acting between the liquid and the furnace wall.Therefore, if the molten glass liquid is filled to this area, it will create an error as an aspherical lens, so only the area near the center is used. do.
毎分回転数 n=95 とすると、 ω=9.9484(rad/s) 4 X 980 Hoは定数で放物面形状には無関係。If the number of revolutions per minute is n = 95, ω=9.9484 (rad/s) 4 X 980 Ho is a constant and is unrelated to the parabolic shape.
この式で計算した非球面レンズと球面レンズ(半径10
0蘭と1501111) との比較を第6図に示す。Aspherical lenses and spherical lenses (radius 10
A comparison between 0ran and 1501111) is shown in Figure 6.
勿論、炉の回転数を任意に調整、変化すれば、任意の放
物線状回転面よりなる非球面レンズ、又は反射鏡を作る
ことができる。Of course, by arbitrarily adjusting or changing the rotational speed of the furnace, an aspheric lens or reflecting mirror made of any parabolic rotating surface can be made.
ト)発明の効果
本発明は上記の如く構成されるものであるから従来、最
も至難とされである非球面を炉を回転する角速度の数値
により炉体内に溶融された鉛版面上に所望非球面状の回
転面を成形することが可能であるから、該回転面を一定
に保持しながら炉体をコントロールしつつ回転すること
により錆液より比重の軽い光学硝子溶液を流し込むこと
により錆液の非球面状回転面が一種の成形型となり、所
要非球面の硝子体を容易に求めることが可能であるから
、従来の非球面レンズの製法に一新機軸をもたらした有
益な発明である。g) Effects of the Invention Since the present invention is constructed as described above, it is possible to create a desired aspherical surface on the lead plate surface melted in the furnace body by adjusting the numerical value of the angular velocity of rotating the furnace, which is considered to be the most difficult task in the past. Since it is possible to mold a rotating surface of the shape, by controlling and rotating the furnace body while holding the rotating surface constant, an optical glass solution having a specific gravity lower than that of the rust solution is poured in, thereby removing the rust solution. Since the spherical rotating surface serves as a type of mold and it is possible to easily obtain the required aspherical vitreous body, this is a useful invention that has revolutionized the conventional manufacturing method of aspherical lenses.
添付図面は本発明方法の実施例を示す説明図にして、第
1図は装置全体の側面図、第2図は非球面状回転面の成
形型により成形される硝子液を示す側面図、第3図は炉
体に角速度(ω)を加える方向の説明図、第4図は炉体
に鉛を流した状態の側面図、第5図は炉体内の錆液に非
球面状回転面を成形した状態を示す側面図、第6図は一
般球面レンズと本発明非球面レンズの球面の比較を示す
グラフ図である。
尚、図中符号The attached drawings are explanatory diagrams showing an embodiment of the method of the present invention, and FIG. 1 is a side view of the entire apparatus, FIG. Figure 3 is an explanatory diagram of the direction in which angular velocity (ω) is applied to the furnace body, Figure 4 is a side view of the state in which lead is poured into the furnace body, and Figure 5 is an aspherical rotating surface formed in the rust liquid inside the furnace body. FIG. 6 is a graph showing a comparison of the spherical surfaces of a general spherical lens and an aspherical lens of the present invention. In addition, the symbol in the figure
Claims (1)
回転することにより鉛液面に生ずる非球面状の回転面を
一定に保ちつつ炉の回転を継続し、非球面状の回転面に
溶融硝子液を流し込み、炉を冷却することにより鉛面と
同一の非球面状の硝子体を求めることを特徴とする非球
面レンズの製法。The molten lead liquid is rotated together with the furnace at the required angular velocity, and the furnace continues to rotate while keeping the aspherical surface of rotation generated on the surface of the lead liquid constant. A manufacturing method for aspherical lenses characterized by pouring a liquid and cooling a furnace to obtain an aspherical vitreous body that is the same as a lead surface.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8584287A JPS63252931A (en) | 1987-04-09 | 1987-04-09 | Production of nonspherical surface lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8584287A JPS63252931A (en) | 1987-04-09 | 1987-04-09 | Production of nonspherical surface lens |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63252931A true JPS63252931A (en) | 1988-10-20 |
JPH0380738B2 JPH0380738B2 (en) | 1991-12-25 |
Family
ID=13870117
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8584287A Granted JPS63252931A (en) | 1987-04-09 | 1987-04-09 | Production of nonspherical surface lens |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63252931A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004040842A1 (en) * | 2004-08-23 | 2006-03-02 | Schott Ag | Method for floating glasses on bismuth-containing media |
-
1987
- 1987-04-09 JP JP8584287A patent/JPS63252931A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004040842A1 (en) * | 2004-08-23 | 2006-03-02 | Schott Ag | Method for floating glasses on bismuth-containing media |
DE102004040842B4 (en) * | 2004-08-23 | 2009-12-24 | Schott Ag | Method for floating reduction-sensitive phosphate glasses and use of bismuth |
Also Published As
Publication number | Publication date |
---|---|
JPH0380738B2 (en) | 1991-12-25 |
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