JPH0656437A - Forming of glass raw material for aspherical lens - Google Patents
Forming of glass raw material for aspherical lensInfo
- Publication number
- JPH0656437A JPH0656437A JP20584592A JP20584592A JPH0656437A JP H0656437 A JPH0656437 A JP H0656437A JP 20584592 A JP20584592 A JP 20584592A JP 20584592 A JP20584592 A JP 20584592A JP H0656437 A JPH0656437 A JP H0656437A
- Authority
- JP
- Japan
- Prior art keywords
- glass material
- press
- glass
- lens
- raw material
- 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.)
- Pending
Links
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
- C03B11/06—Construction of plunger or mould
- C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は光学機器に使用される非
球面レンズを精密ガラス成形法により成形する非球面レ
ンズのガラス素材の成形方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for molding a glass material for an aspherical lens, which comprises molding an aspherical lens used in an optical instrument by a precision glass molding method.
【0002】[0002]
【従来の技術】近年光学レンズを形成するために成形工
法が多く試みられ実用段階にある。このような成形工法
では得ようとしているレンズに対応した成形型と前記成
形型内に充填するガラス素材を製作して成形に用いれば
よい。2. Description of the Related Art In recent years, many molding methods have been tried to form optical lenses and are in a practical stage. In such a molding method, a mold corresponding to the lens to be obtained and a glass material to be filled in the mold may be manufactured and used for molding.
【0003】一般的に成形型内に充填されるガラス素材
の製作は溶融ガラスからプレス成型等(1次加工のガラ
ス素材)の手段によって生成されて、最終的(所望)に
必要とするガラス素材の形状とほぼ相似の形状にされる
が、外径(直径)と厚さの削り代だけ大きくなっていて
表面はまざらで不透明である。従って、球面レンズを製
造するように厚み代を研摩にて研削し、外径(直径)の
削り代は心取り機により作業が行なわれていて軸対称に
なるように研削されて最終的(所望)に必要とするガラ
ス素材が製作されている。Generally, a glass material to be filled in a molding die is produced from molten glass by means of press molding or the like (glass material for primary processing), and is finally (desirably) required. The shape is almost similar to the shape of, but the outer diameter (diameter) and the cutting allowance of the thickness are large, and the surface is rough and opaque. Therefore, the thickness allowance is ground by polishing so that a spherical lens is manufactured, and the removal allowance of the outer diameter (diameter) is worked by a centering machine and is ground so as to be axially symmetric. The glass material required for) is manufactured.
【0004】しかしながら非球面成形レンズに使用する
ガラス素材の加工方法についてはあまり知られていな
い。However, little is known about a method of processing a glass material used for an aspherical molded lens.
【0005】以下に従来の非球面成形レンズのガラス素
材の成形方法について説明する。図2(a)は従来の溶
融ガラスからプレス成型品E(1次加工のガラス素材)
によって生成されて最終的(所望)に必要とするガラス
素材3′とほぼ相似の形状を示し、表面2はまざらで不
透明な活性面でおおわれている状態を示し、Aはガラス
素材の厚み、Bはガラス素材3の外径(直径)、EとF
は所望ガラス素材3′を得るための削り代部で形成され
ている。A conventional method for molding a glass material for an aspherical molded lens will be described below. FIG. 2 (a) shows a press-molded product E (glass material for primary processing) from a conventional molten glass.
The glass material 3 ', which has a shape similar to that of the glass material 3'which is finally (desirably) required, is formed, the surface 2 is covered with a rough and opaque active surface, and A is the thickness of the glass material. B is the outer diameter (diameter) of the glass material 3, E and F
Is formed with a cutting margin for obtaining the desired glass material 3 '.
【0006】以上のように形成されたガラス素材の表面
全体がまざらで不透明な活性面であるため、厚みCをA
の状態まで研摩にて表面2を削り、表面1及び表面1′
の面形状とする。外径はBの状態まで心取り機を使用し
て表面2を削り、球面レンズを製造する方法で所望のガ
ラス素材3′の加工は完了される。Since the entire surface of the glass material formed as described above is a rough and opaque active surface, the thickness C is A
Surface 2 is ground by polishing until
And the surface shape. The surface 2 is ground to a state where the outer diameter is B using a centering machine, and the processing of the desired glass material 3'is completed by the method of manufacturing a spherical lens.
【0007】以上のような状態のガラス素材3′を図2
(b)に示すように非球面レンズ成形型の上型4、下型
5、胴型6によって構成されている成形型内にガラス素
材3を充填し押圧成形されたことにより所望の性能の非
球面レンズ3′を安定して得ることができる。The glass material 3'in the above state is shown in FIG.
As shown in (b), the glass material 3 is filled in the molding die constituted by the upper die 4, the lower die 5, and the body die 6 of the aspherical lens molding die, and the desired performance is obtained. The spherical lens 3'can be obtained stably.
【0008】[0008]
【発明が解決しようとする課題】しかしながら図2にお
いて、所望するガラス素材3′の形状は前述したよう
に、溶融ガラスからプレス成型品3(1次加工のガラス
素材)によって最終的に必要とするガラス素材3′に対
して厚みEの部分と外径(直径)Fの部分の削り代だけ
大きくなっているため以下のような問題があった。 (1)所望するガラス素材3′の形状を得るには、球面
レンズを製造するように研摩工程と心取り工程を必要と
するため、高価なガラス素材3′となっていた。 (2)所望のガラス素材3′を入手するまでのリードタ
イム(製作工程)が、溶融ガラスからプレス成型品E→
研摩工程→洗浄→心取り工程→洗浄→所望ガラス完成→
非球面成形レンズの成形作業というように工程が長いた
めガラス素材3′の在庫を多く必要としていた。 (3)ガラス素材3′は完成レンズのように反射防止膜
が施されていないため、在庫期間が長くなるとガラス素
材表面は化学的変質をおこしやすいためヤケ等の発生が
必配されたため保管が難しい。However, in FIG. 2, the desired shape of the glass material 3'is finally required from the molten glass by the press-molded product 3 (glass material for primary processing) as described above. The thickness E and the outer diameter (diameter) F are larger than the glass material 3'by the cutting allowance, so that the following problems occur. (1) In order to obtain the desired shape of the glass material 3 ', a polishing step and a centering step are required to manufacture a spherical lens, which results in an expensive glass material 3'. (2) The lead time (manufacturing process) until the desired glass material 3 ′ is obtained is from molten glass to press-molded product E →
Polishing process → Washing → Centering process → Washing → Finishing desired glass →
Due to the long process such as the molding work of the aspherical molded lens, a large amount of the glass material 3'is required to be in stock. (3) Since the glass material 3'has no anti-reflective film like the finished lens, it is difficult to store it because the surface of the glass material is prone to chemical deterioration when the stock period is long and it is necessary to cause burns and the like. .
【0009】本発明は上記従来の問題点に鑑みて、安価
にかつ確実に所望のガラス素材を得ると共にリードタイ
ムを短くして作業の効率を高めることを目的とする。In view of the above-mentioned conventional problems, it is an object of the present invention to obtain a desired glass material inexpensively and surely and shorten the lead time to improve the work efficiency.
【0010】[0010]
【課題を解決するための手段】上記課題を解決するため
に本発明は、ガラス素材を、溶融ガラスの状態から、そ
の直径寸法が第1の寸法に設定された成形型を用いてプ
レス成形によって、その直径寸法が第1の寸法に設定さ
れ、かつ、その後に加工を要さない直径寸法になるよう
に成形し、ガラス素材全体を所望の寸法に加工し、ガラ
ス素材の表面及び裏面が透明になるように加工するもの
である。In order to solve the above problems, the present invention is to press a glass material from a molten glass state by press molding using a molding die whose diameter dimension is set to a first dimension. , The diameter of the glass material is set to the first dimension, and the glass material is molded to have a diameter dimension that does not require subsequent processing, and the entire glass material is processed to the desired dimension, and the front and back surfaces of the glass material are transparent. It is processed to become.
【0011】[0011]
【作用】このような特徴を有する本発明によれば、溶融
ガラスからプレス成型品(1次加工のガラス素材)によ
り最終的なガラス素材の形状とほぼ相似の形状にされた
表面はまざらで不透明な形状のガラス素材に於いて、前
記プレス成型品(1次加工のガラス素材)の段階で最終
的に必要とするガラス素材の外径をあらかじめ設定する
ことにより、これらガラス素材の加工は両方の面のみと
なり心取り作業は不要にすることができる。According to the present invention having such characteristics, the surface of the molten glass, which is formed into a shape substantially similar to the shape of the final glass material by the press-molded product (the glass material of the primary processing), is rough. In the case of opaque glass materials, both of these glass materials can be processed by setting the outer diameter of the glass material that is finally required at the stage of the press-molded product (the glass material of the primary processing). It becomes only the side of, and the centering work can be unnecessary.
【0012】このガラス素材を成形型内に充填し押圧成
形すると、成形されるレンズに所望の光学有効径とレン
ズ外径を得るようにしている。When this glass material is filled in a molding die and pressure-molded, the lens to be molded has a desired optical effective diameter and lens outer diameter.
【0013】[0013]
【実施例】以下本発明の一実施例について、図面を用い
て説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
【0014】図1は本発明の一実施例によるガラス素材
とレンズを製造するために用いられる成形型の構成を示
す断面図である。FIG. 1 is a sectional view showing the construction of a molding die used for manufacturing a glass material and a lens according to an embodiment of the present invention.
【0015】本実施例においても、溶融ガラスからプレ
ス成型品F(1次加工のガラス素材)によって、最終的
に必要とするガラス素材13′とほぼ相似の形状を示
し、表面11はまざらで不透明な活性面でおおわれてい
る状態を示していることは前述した従来例と同様であ
る。Also in this embodiment, the press-molded product F (glass material for primary processing) from molten glass shows a shape substantially similar to the glass material 13 'that is finally required, and the surface 11 is rough. The fact that it is covered with an opaque active surface is the same as in the conventional example described above.
【0016】さて本実施例において、プレス成型品(1
次加工のガラス素材)13の厚みA、ガラス素材13′
の外径(直径)Bと削り代Eとの関係について以下に詳
細に説明する。In the present embodiment, the press-formed product (1
Subsequent processing glass material 13 thickness A, glass material 13 '
The relationship between the outer diameter (diameter) B and the cutting allowance E will be described in detail below.
【0017】図1(a)においては所望のガラス素材1
3′を得るために厚みAまで加工された面形状を11と
11′で示し、Bは溶融ガラスからプレス成型品13
(1次加工のガラス素材)での段階で最終的に必要とす
るガラス素材の外径B(直径)をあらかじめプレス成型
品13の時点で設定しているため、所望のガラス素材1
3′の外径(直径)を示している。Eは所望ガラス素材
13′の両方の面形状11と11′を得るための削り代
部の範囲を示している。In FIG. 1A, the desired glass material 1
The surface shapes machined to a thickness A to obtain 3'are indicated by 11 and 11 ', and B is a molten glass press-formed product 13
Since the outer diameter B (diameter) of the glass material finally required at the stage of (primary processing glass material) is set in advance at the time of the press-molded product 13, the desired glass material 1
The outer diameter (diameter) of 3'is shown. E indicates the range of the cutting margin for obtaining both surface shapes 11 and 11 'of the desired glass material 13'.
【0018】以上のような状態のガラス素材13′を図
1(b)に示すように成形型の上型14、下型15、胴
型16によって構成されている上型13、下型14内に
充填し押圧成形することにより所望の性能の非球面レン
ズ17が安定して得られるようにしている。As shown in FIG. 1 (b), the glass material 13 'in the above-described state is formed in the upper mold 14, the lower mold 15, and the body mold 16 in the upper mold 13 and the lower mold 14. And then press-molded so that the aspherical lens 17 having desired performance can be stably obtained.
【0019】本発明では溶融ガラスからプレス成型品1
3(1次加工のガラス素材)での段階で最終的に必要と
するガラス素材13′の外径(直径)Bをあらかじめプ
レス成型品13の時点で設定することにより、Eの研削
作業後の心取り作業を不必要としている。即ち両方の面
11,11′を得ることにより所望のガラス素材13′
が完成することができる。In the present invention, a press-molded article 1 made of molten glass is used.
By setting the outer diameter (diameter) B of the glass material 13 'finally required at the stage of 3 (glass material for primary processing) in advance at the time of press-molded product 13, after the grinding work of E, It doesn't require the work of taking care. That is, by obtaining both surfaces 11, 11 ', the desired glass material 13'
Can be completed.
【0020】次に本実施例によるガラス素材とそのガラ
ス素材から生成される非球面成形レンズの関係について
説明する。Next, the relationship between the glass material according to the present embodiment and the aspherical molded lens produced from the glass material will be described.
【0021】ここで所望レンズの体積269.06mm3
でレンズ中心厚みをt2.8mm、レンズ光学有効径をφ
11.78mm、レンズ外径をφ13.0mmの非球面レン
ズを得ようとした場合、充填するガラス素材13′は所
望のレンズより大きく見積もる必要があるため、例えば
中心厚みAをt3.50mm、外径Bをφ12.8mm、1
1と11′の曲率をそれぞれR=14.559mmとR=
29.411mmにするとガラス素材13′の体積は31
1.557mm3となり所望レンズ形状が得られるように
所望ガラス素材13′を設定する。こうして形状を設定
したのち、所望のガラス素材13′を得るには溶融ガラ
スからプレス成型品13(1次加工のガラス素材)の形
状をガラス素材13′より大きくする必要があるため、
仮に中心厚みAを片肉0.5mmずつ大きくしてt4.5
mmとして、外径と曲率は所望ガラス素材13′と同寸法
にすると、所望ガラス13′を得るには削り代Eを11
と11′の位置まで研摩にて加工すると透明な所望のガ
ラス素材13′は完成する。Here, the desired lens volume is 269.06 mm 3
And the lens center thickness is t2.8 mm, and the lens optical effective diameter is φ.
When trying to obtain an aspherical lens having an lens outer diameter of 11.78 mm and a lens outer diameter of φ13.0 mm, the glass material 13 ′ to be filled needs to be estimated larger than the desired lens. For example, the center thickness A is t3.50 mm and the outer diameter is Diameter B is φ12.8 mm, 1
The curvatures of 1 and 11 'are R = 14.559 mm and R =
If the size is 29.411 mm, the volume of the glass material 13 'is 31.
The desired glass material 13 'is set so that the desired lens shape is obtained with 1.557 mm 3 . After setting the shape in this way, in order to obtain the desired glass material 13 ', it is necessary to make the shape of the press-formed product 13 (the glass material for the primary processing) from the molten glass larger than that of the glass material 13'.
Temporarily increase the center thickness A by 0.5 mm for each piece and t4.5
Assuming that the outer diameter and the curvature are the same as those of the desired glass material 13 ', the cutting allowance E is 11 to obtain the desired glass 13'.
By polishing to positions 11 and 11 ', the desired transparent glass material 13' is completed.
【0022】このようなガラス素材13′を上型14、
下型15、胴型16から構成される成形型内に充填して
押圧成形した両凸の非球面レンズ17において、所望の
性能を得ると共に安定して製造することができた。The above glass material 13 'is applied to the upper mold 14,
The biconvex aspherical lens 17 filled in the molding die composed of the lower die 15 and the body die 16 and press-molded was able to obtain desired performance and be stably manufactured.
【0023】[0023]
【発明の効果】以上詳細に説明したように本発明によれ
ば、上述した溶融ガラスからプレス成型品(1次加工の
ガラス素材)の段階で所望するガラス素材の外径(直
径)寸法をあらかじめプレス成型品(1次加工のガラス
素材)の時点で設定したことにより、外径(直径)の加
工作業がいらなくなったと同時に心取り機の設備投資も
不要となり、所望するガラス素材の加工工数も減り安価
なガラス素材を得ると共にリードタイムも短くして作業
の効率を高めることができる。As described in detail above, according to the present invention, the desired outer diameter (diameter) dimension of the glass material is preset in the stage of the above-mentioned molten glass into a press-molded product (glass material for primary processing). By setting it at the time of press-molded products (glass material for primary processing), there is no need to process the outer diameter (diameter), and at the same time the capital investment of the centering machine becomes unnecessary and the number of processing steps for the desired glass material It is possible to obtain a less expensive glass material and shorten the lead time to improve work efficiency.
【図1】(a)本発明の一実施例による非球面成形レン
ズのガラス素材の成形方法の構成を示す断面図 (b)同実施例における成形型の構成を示す断面図FIG. 1 (a) is a sectional view showing a constitution of a method for molding a glass material of an aspherical molded lens according to an embodiment of the present invention (b) a sectional view showing a constitution of a molding die in the same embodiment.
【図2】(a)従来例による非球面成形レンズのガラス
素材の成形方法の構成を示す断面図 (b)同例における成形型の構成を示す断面図FIG. 2A is a cross-sectional view showing a configuration of a method for molding a glass material of an aspherical molded lens according to a conventional example. FIG. 2B is a cross-sectional view showing a configuration of a molding die in the same example.
11 面形状 11′ 面形状 13 プレス成形品 13′ 所望のガラス素材 11 surface shape 11 'surface shape 13 press-formed product 13' desired glass material
───────────────────────────────────────────────────── フロントページの続き (72)発明者 板垣 正幸 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Masayuki Itagaki 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.
Claims (1)
の直径寸法が第1の寸法に設定された成形型を用いてプ
レス成形によって、その直径寸法が前記第1の寸法に設
定され、かつ、その後に加工を要さない直径寸法になる
ように成形し、前記ガラス素材全体を所望の寸法に加工
し、前記ガラス素材の表面及び裏面が透明になるように
加工したことを特徴とする非球面成形レンズのガラス素
材の成形方法。1. A glass material is press-molded from a molten glass state using a molding die whose diameter dimension is set to the first dimension, and the diameter dimension is set to the first dimension, and , Characterized in that the glass material is formed into a diameter dimension that does not require subsequent processing, the entire glass material is processed into desired dimensions, and the front and back surfaces of the glass material are processed to be transparent. Molding method for glass material of spherical molded lens.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20584592A JPH0656437A (en) | 1992-08-03 | 1992-08-03 | Forming of glass raw material for aspherical lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20584592A JPH0656437A (en) | 1992-08-03 | 1992-08-03 | Forming of glass raw material for aspherical lens |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0656437A true JPH0656437A (en) | 1994-03-01 |
Family
ID=16513668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20584592A Pending JPH0656437A (en) | 1992-08-03 | 1992-08-03 | Forming of glass raw material for aspherical lens |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0656437A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1298286C (en) * | 2001-10-31 | 2007-02-07 | 株式会社东芝 | Computer X-ray laminagraphy equipment |
-
1992
- 1992-08-03 JP JP20584592A patent/JPH0656437A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1298286C (en) * | 2001-10-31 | 2007-02-07 | 株式会社东芝 | Computer X-ray laminagraphy equipment |
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