JPH0343214Y2 - - Google Patents
Info
- Publication number
- JPH0343214Y2 JPH0343214Y2 JP18530386U JP18530386U JPH0343214Y2 JP H0343214 Y2 JPH0343214 Y2 JP H0343214Y2 JP 18530386 U JP18530386 U JP 18530386U JP 18530386 U JP18530386 U JP 18530386U JP H0343214 Y2 JPH0343214 Y2 JP H0343214Y2
- Authority
- JP
- Japan
- Prior art keywords
- molding
- mold
- surface roughness
- rmax
- molding surface
- 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
- 238000000465 moulding Methods 0.000 claims description 72
- 230000003746 surface roughness Effects 0.000 claims description 31
- 230000003287 optical effect Effects 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 14
- 229910003460 diamond Inorganic materials 0.000 claims description 2
- 239000010432 diamond Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 description 20
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000005219 brazing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Landscapes
- Ceramic Products (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Description
【考案の詳細な説明】 ［産業上の利用分野］ 本考案は、光学素子成形用型に関する。[Detailed explanation of the idea] [Industrial application field] The present invention relates to a mold for molding an optical element.
［従来の技術］
近年、レンズ，プリズム，フイルタ等の光学素
子の製造方法として一対の成形用型間に光学素子
のガラス素材を挿入配置し、これを加圧するだけ
で光学素子を得る押圧成形が行われている。[Prior Art] In recent years, press molding has become popular as a method of manufacturing optical elements such as lenses, prisms, filters, etc., in which the glass material of the optical element is inserted between a pair of molds, and the glass material of the optical element is placed under pressure. It is being done.
従来、この押圧成形で用いる成形用型の成形面
は、例えば特開昭59−116137号公報に記載されて
いるように、光学加工による鏡面仕上げがなさ
れ、高い面精度に形成されている。そして、かか
る成形用型により、表面粗さがRmax0.1μm以下
とかこれに近い表面粗さのガラス素材を加熱して
フアイアーポリツシユ状にした表面を有するガラ
ス素材あるいは最終製品形状に近似の形状にした
後に再加熱して成形可能な温度に保たれた半製品
の成形ガラスを、押圧成形していた。 Conventionally, the molding surface of the mold used in this press molding has been mirror-finished by optical processing, as described in, for example, Japanese Patent Laid-Open No. 116137/1983, and has been formed with high surface precision. Then, by using such a mold, a glass material having a surface roughness of Rmax0.1 μm or less or close to this is heated and made into a fire polish-like surface, or a shape similar to the final product shape. The semi-finished molded glass was then reheated and kept at a moldable temperature and then press-molded.
［考案が解決しようとする問題点］
しかしながら、上述の如き光学加工した成形面
を有する成形用型で押圧成形すると、押圧成形中
に、成形用型とガラス素材とがオプテイカルコン
タクトを起こし、成形用型の成形面にガラスが焼
き付いてしまうことが多かつた。[Problems to be solved by the invention] However, when press molding is performed using a mold having an optically processed molding surface as described above, optical contact occurs between the mold and the glass material during the press molding, and the molding Glass was often baked onto the molding surface of the mold.
本考案は、このような従来の問題点に鑑みてな
されたもので、オプテイカルコンタクトを生ずる
ことがなく、しかも成形により得た光学素子の表
面粗さが光学性能を損なわない成形用型を提供す
ることを目的とする。 The present invention was devised in view of these conventional problems, and provides a molding mold that does not cause optical contact and does not impair optical performance due to the surface roughness of the optical element obtained by molding. The purpose is to
［問題点を解決するための手段］
上記従来の問題点を解決するために、本考案
は、光学素子成形用型における成形面の表面粗さ
をRmax＝0.07〜1.00μmとしたものである。ここ
に、前記成形面の表面粗さがRmax＝0.07μmよ
り小さいと、オプテイカルコンタクトを生じてガ
ラス成形面に焼き付いてしまう。また、成形面の
表面粗さがRmax＝1.00μmより大きいと、成形
により得た光学素子の表面粗さが大きくなつて光
学性能を満足することができない。[Means for Solving the Problems] In order to solve the above conventional problems, the present invention sets the surface roughness of the molding surface of the mold for molding an optical element to Rmax=0.07 to 1.00 μm. Here, if the surface roughness of the molding surface is smaller than Rmax = 0.07 μm, optical contact will occur and will be burned onto the glass molding surface. Furthermore, if the surface roughness of the molding surface is greater than Rmax = 1.00 μm, the surface roughness of the optical element obtained by molding becomes so large that optical performance cannot be satisfied.
一方、本考案において少なくとも成形面を
SiC，α型サイアロン，CBNまたはダイヤモンド
を主成分とした材料で構成すると、所望の表面粗
さを容易にしてかつ均一に得ることができ、金属
で構成したものに比べて高硬度．高耐食性であ
り、成形用型の延命化を図ることができる。 On the other hand, in the present invention, at least the molding surface is
When composed of materials mainly composed of SiC, α-sialon, CBN, or diamond, the desired surface roughness can be easily and uniformly obtained, and the hardness is higher than that of materials composed of metal. It has high corrosion resistance and can extend the life of molds.
［作用］
かかる構成の光学素子成形用型によれば、押圧
成形中に、成形用型とガラス素材とがオプテイカ
ルコンタクトを生ずることがない。また、成形に
より得られた光学素子は、充分に光学性能を満足
している。[Function] According to the mold for molding an optical element having such a configuration, optical contact does not occur between the mold and the glass material during press molding. Moreover, the optical element obtained by molding sufficiently satisfies the optical performance.
［実施例］ 以下、本考案を実施例に基づきに説明する。[Example] Hereinafter, the present invention will be explained based on examples.
（第１実施例）
第１図に示すように、SiCを焼結して成形用型
概略形状とした成形用型ブランクを研削により成
形し、その成形用型１の成形面１ａをアルミナ等
の研摩剤により研摩して、表面粗さをRmax＝
0.449μmとした。(First Example) As shown in Fig. 1, a mold blank made by sintering SiC into the general shape of a mold is formed by grinding, and the molding surface 1a of the mold 1 is made of alumina or the like. Polish with an abrasive to reduce the surface roughness to Rmax=
It was set to 0.449 μm.
本実施例においては、成形面１ａの表面粗さが
Rmax≒0.4μmであるので、成形面１ａとガラス
素材との離型性が良好となり、成形面１ａへのガ
ラスの焼き付きがなくなる。実際、連続10000シ
ヨツト成形において、成形面１ａへのガラスの焼
き付きは生じなかつた。また、10000シヨツト成
形以降に成形したレンズを光ピツクアツプ用レン
ズとして実装したが、研摩レンズと比して何ら劣
ることはなかつた。 In this example, the surface roughness of the molding surface 1a is
Since Rmax≈0.4 μm, the mold releasability between the molding surface 1a and the glass material is good, and the glass is prevented from sticking to the molding surface 1a. In fact, in continuous molding of 10,000 shots, no burning of the glass onto the molding surface 1a occurred. In addition, lenses molded after 10,000 shots were mounted as lenses for optical pickup, and they were not inferior in any way compared to polished lenses.
なお、本実施例において表面粗さ。をRmax≒
0.4μmとしたのは、SiCの加工性およびガラスの
焼き付き性を考慮した場合にRmax＝0.4μm程度
が最適だからであり、SiCを用いたのは、SiCが
耐高温性，耐酸化性に優れ、また高硬度だからで
ある。 Note that in this example, surface roughness. Rmax≒
The reason for choosing 0.4 μm is that Rmax = approximately 0.4 μm is optimal when considering the workability of SiC and the seizure resistance of glass.The reason for using SiC is that SiC has excellent high temperature resistance and oxidation resistance. , and also because of its high hardness.
第２図は、本実施例の成形用型１の成形面１ａ
における表面粗さ（Rmax＝0.449μm）を示した
ものである。また、第３図は、本実施例の成形用
型１により押圧成形して得た10000シヨツト目の
レンズの表面粗さ（Rmax＝0.021μm）を示した
ものである。 FIG. 2 shows the molding surface 1a of the mold 1 of this embodiment.
The figure shows the surface roughness (Rmax=0.449μm) at Furthermore, FIG. 3 shows the surface roughness (Rmax=0.021 μm) of the 10,000th shot lens obtained by pressure molding using the mold 1 of this example.
（第２実施例）
CBNを焼結して成形用型概略形状とした成形
用型ブランクを研削により成形し、その成形用型
１の成形面１ａをアルミナ等の研摩剤により研摩
して、表面粗さをRmax＝0.695μmとした。(Second Example) A mold blank made by sintering CBN into the general shape of a mold is molded by grinding, and the molding surface 1a of the mold 1 is polished with an abrasive such as alumina. The roughness was set to Rmax = 0.695 μm.
本実施例においては、成形面１ａの表面粗さが
Rmax≒0.7μmであるので、成形面１ａとガラス
素材との離型性が良好となり、成形面１ａへのガ
ラスの焼き付きがなくなる。実際、連続10000シ
ヨツト成形において、成形面１ａへのガラスの焼
き付きは生じなかつた。また、10000シヨツト成
形以降に成形したレンズを光ピツクアツプ用レン
ズとして実装したが、研摩レンズと比して何ら劣
ることはなかつた。つまり、CBN焼結体は高硬
度なので、金属性の成形用型のように成形面が荒
れることがなく、初期性能を有していた。 In this example, the surface roughness of the molding surface 1a is
Since Rmax≈0.7 μm, the mold releasability between the molding surface 1a and the glass material is good, and the glass is prevented from sticking to the molding surface 1a. In fact, in continuous molding of 10,000 shots, no burning of the glass onto the molding surface 1a occurred. In addition, lenses molded after 10,000 shots were mounted as lenses for optical pickup, and they were not inferior in any way compared to polished lenses. In other words, since the CBN sintered body has high hardness, the molding surface did not become rough unlike a metal mold, and it had good initial performance.
なお、本実施例において表面粗さをRmax≒
0.7μmとしたのは、CBNにより成形用型１を形
成した場合には、Rmax＝0.7μm程度が焼き付き
の点で最適だからである。 In addition, in this example, the surface roughness is Rmax≒
The reason why it is set to 0.7 μm is that when the molding die 1 is formed of CBN, Rmax=0.7 μm is optimal in terms of seizure.
第４図は、本実施例の成形用型１の成形面１ａ
における表面粗さ（Rmax＝0.695μm）を示した
ものである。また、第５図は、本実施例の成形用
型１により押圧成形して得た10000シヨツト目の
レンズの表面粗さ（Rmax＝0.032μm）を示した
ものである。 FIG. 4 shows the molding surface 1a of the mold 1 of this embodiment.
The figure shows the surface roughness (Rmax=0.695μm) at Furthermore, FIG. 5 shows the surface roughness (Rmax=0.032 μm) of the 10,000th shot lens obtained by pressure molding using the mold 1 of this example.
（第３実施例）
第６図に示すように、WC等の超硬材からなる
なる母材２にα型サイアロン焼結体からなる成形
部３をろう付けした成形用型ブランクを研摩によ
り成形し、その成形用型４の成形面４ａをアルミ
ナ等の研摩材より研摩して表面粗さをRmax＝
0.97μmとした。(Third Example) As shown in Fig. 6, a mold blank is formed by brazing a molding part 3 made of an α-type sialon sintered body to a base material 2 made of a superhard material such as WC. Then, the molding surface 4a of the molding die 4 is polished with an abrasive material such as alumina to obtain a surface roughness of Rmax=
It was set to 0.97μm.
本実施例においては、成形面４ａの表面粗さが
Rmax≒1.0μmであるので、成形面４ａとガラス
素材との離型性が良好となり、成形面４ａへのガ
ラスの焼き付きがなくなる。実際、連続2000シヨ
ツト成形において、成形面４ａへのガラスの焼き
付きは生じなかつた。また、2000シヨツト成形以
降に成形したレンズの外観や諸性能は、同形状の
平滑な成形面を有する従来の成形用型により成形
したレンズと比べて何ら変わりなかつた。 In this example, the surface roughness of the molding surface 4a is
Since Rmax≈1.0 μm, the molding surface 4a and the glass material have good mold releasability, and the glass is prevented from sticking to the molding surface 4a. In fact, during continuous 2000 shot molding, no glass sticking to the molding surface 4a occurred. Furthermore, the appearance and various performances of lenses molded after the 2000 shot molding were no different from lenses molded using conventional molds having the same shape and smooth molding surface.
なお、本実施例において、α型サイアロンを用
いたのは、α型サイアロンが耐熱衝撃性等に優れ
ているからである。また、成形用型４全体をα型
サイアロンで形成しないのは、コスト高となるの
を制御するためで、ろう付けによる不具合は生じ
なかつた。 In this example, α-type sialon was used because α-type sialon has excellent thermal shock resistance and the like. Furthermore, the reason why the entire molding die 4 is not made of α-type sialon is to control the increase in cost, and no problems were caused by brazing.
第７図は、本実施例の成形用型４の成形面４ａ
における表面粗さ（Rmax＝0.97μm）を示した
ものである。また、第８図は、本実施例の成形用
型４により押圧成形して得たレンズの表面粗さ
（Rmax＝0.034μm）を示したものである。 FIG. 7 shows the molding surface 4a of the mold 4 of this embodiment.
The figure shows the surface roughness (Rmax=0.97μm) at Moreover, FIG. 8 shows the surface roughness (Rmax=0.034 μm) of the lens obtained by pressure molding using the mold 4 of this example.
なお、本考案は、前記第１〜３実施例に限ら
ず、成形面の表面粗さがRmax＝0.07〜1.00μmの
範囲、例えば表面粗さRmax＝0.1μm程度であつ
ても、所定の効果を得ることができる。 Note that the present invention is not limited to the first to third embodiments described above, and even if the surface roughness of the molding surface is in the range of Rmax = 0.07 to 1.00 μm, for example, the surface roughness Rmax = about 0.1 μm, the predetermined effect can be achieved. can be obtained.
［考案の効果］
以上のように、本考案の光学素子成形用型によ
れば、成形面の表面粗さをRmax＝0.07μm〜
1.00μmとしているので、押圧成形中に成形用型
とガラス素材とがオプテイカルコンタクトを生ず
ることはなく、成形面にガラスが焼き付くことが
ない。また、この成形用型により成形して得られ
た光学素子の光学的性能は、平滑な成形面を有す
る従来の成形用により成形して得られた光学素子
と比べて何ら劣ることはない。[Effects of the invention] As described above, according to the mold for molding optical elements of the invention, the surface roughness of the molding surface can be adjusted to Rmax = 0.07 μm ~
Since the diameter is 1.00 μm, there will be no optical contact between the mold and the glass material during press molding, and the glass will not be baked onto the molding surface. Further, the optical performance of the optical element obtained by molding with this molding die is not inferior in any way to that of an optical element obtained by molding with a conventional molding method having a smooth molding surface.
第１図は本考案の第１および第２実施例の成形
用型を示す正面図、第２図は第１実施例の成形用
型の成形面における表面粗さを示すグラフ、第３
図は第１実施例の成形用型で成形したレンズの表
面粗さを示すグラフ、第４図は第２実施例の成形
用型の成形面における表面粗さを示すグラフ、第
５図は第２実施例の成形用型で成形したレンズの
表面粗さを示すグラフ、第６図は本考案の第３実
施例の成形用型を示す正面図、第７図は第３実施
例の成形用型の成形面における表面粗さを示すグ
ラフ、第８図は第３実施例の成形用型で成形した
レンズの表面粗さを示すグラフである。
１，４……成形用型、１ａ，４ａ……成形面。
FIG. 1 is a front view showing the molds of the first and second embodiments of the present invention, FIG. 2 is a graph showing the surface roughness of the molding surface of the mold of the first embodiment, and FIG.
The figure is a graph showing the surface roughness of a lens molded with the mold of the first example, FIG. 4 is a graph showing the surface roughness of the molding surface of the mold of the second example, and FIG. A graph showing the surface roughness of the lens molded with the mold of the second embodiment, Fig. 6 is a front view showing the mold of the third embodiment of the present invention, and Fig. 7 is a graph showing the surface roughness of the lens molded with the mold of the third embodiment. FIG. 8 is a graph showing the surface roughness of the molding surface of the mold. FIG. 8 is a graph showing the surface roughness of the lens molded with the molding mold of the third embodiment. 1, 4... Molding mold, 1a, 4a... Molding surface.
Claims (1)
あることを特徴とする光学素子成形用型。 (2) 成形用型の少なくとも成形面がSiC，α型サ
イアロン，CBNまたはダイヤモンドを主成分
とした材料からなることを特徴とする実用新案
登録請求の範囲第１項記載の光学素子成形用
型。[Claims for Utility Model Registration] (1) A mold for molding an optical element, characterized in that the surface roughness of the molding surface is Rmax = 0.07 to 1.00 μm. (2) The mold for molding an optical element according to claim 1, wherein at least the molding surface of the mold is made of a material mainly composed of SiC, α-sialon, CBN, or diamond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18530386U JPH0343214Y2 (en) | 1986-12-01 | 1986-12-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18530386U JPH0343214Y2 (en) | 1986-12-01 | 1986-12-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6389935U JPS6389935U (en) | 1988-06-10 |
| JPH0343214Y2 true JPH0343214Y2 (en) | 1991-09-10 |
Family
ID=31133803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18530386U Expired JPH0343214Y2 (en) | 1986-12-01 | 1986-12-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0343214Y2 (en) |
-
1986
- 1986-12-01 JP JP18530386U patent/JPH0343214Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6389935U (en) | 1988-06-10 |
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