JPS62260103A - Lens and its preparation - Google Patents
Lens and its preparationInfo
- Publication number
- JPS62260103A JPS62260103A JP10311886A JP10311886A JPS62260103A JP S62260103 A JPS62260103 A JP S62260103A JP 10311886 A JP10311886 A JP 10311886A JP 10311886 A JP10311886 A JP 10311886A JP S62260103 A JPS62260103 A JP S62260103A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- glass
- manufacturing
- surface layer
- produced
- 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
- 239000011521 glass Substances 0.000 claims abstract description 21
- 239000002344 surface layer Substances 0.000 claims abstract description 12
- 230000003287 optical effect Effects 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 4
- 230000001678 irradiating effect Effects 0.000 claims description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims 2
- 229910002092 carbon dioxide Inorganic materials 0.000 claims 1
- 239000001569 carbon dioxide Substances 0.000 claims 1
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003667 anti-reflective effect Effects 0.000 description 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N argon Substances [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Lenses (AREA)
Abstract
Description
【発明の詳細な説明】
[発明の目的]
(産業上の利用分野)
本発明は、ガラス製の非球面あるいはフレネル型のレン
ズ及びその製作方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an aspherical or Fresnel type lens made of glass and a method for manufacturing the same.
(従来の技術)
従来において、非球面あるい(lフレネルへ1!のレン
ズ製作は、主として、のPMMA (?クリル樹脂)射
出成形による方法、■ガラスのプレス加工による方法、
0球面ガラスレンズにアクリル樹脂被膜をフォトポリマ
ー法でコー1〜し、IJI−Lfi而レ面ズとする方法
、の三つの方法により行われている。(Prior art) In the past, aspherical or Fresnel lenses were mainly produced by injection molding of PMMA (?cryl resin), ■pressing of glass,
This is accomplished using three methods: coating a 0-spherical glass lens with an acrylic resin coating using a photopolymer method to form an IJI-Lfi lens.
しかしながら、上記■の方法は、ガラスに比べ屈折率が
小さいため、プラスチックレンズは、曲率半径を小さく
せざるを得ず、ての結束、肉厚ら大ぎくなる欠点をもっ
ている。また、プラスナックレンズは、屈折率変化の温
度及び湿度に対重ろ依存性が大きく、かつ、変形しや寸
いので、使用環境に制約を受ける。さらに、上’5L■
の方法tま、レンズをプレスした後の冷却に時間がかか
り、加工工数が多くなって価格が高くなる欠点をもって
いる。さらにまた、上記■方法は、表層がアクリル系の
樹脂であるため、キズが付きやす(、かつ、吸湿により
特性変化を起しやすい欠点をもっている。また、表面防
護用のゴミ、湿気からレンズ表面を保護する保護膜、レ
ンズに入射した光を反射さけずにレンズ内に入るように
する△R(Anti−reflective)膜を被着
さVることが困難である。However, in the method (2) above, since the refractive index of the plastic lens is smaller than that of glass, the radius of curvature of the plastic lens must be made small, which has the drawback of increasing the bonding and wall thickness. Furthermore, since the change in refractive index of plastic lenses is highly dependent on temperature and humidity, and they are easily deformed, they are subject to restrictions in the environment in which they can be used. Furthermore, upper '5L■
However, this method has the drawback that it takes time to cool down the lens after it is pressed, which increases the number of processing steps and increases the price. Furthermore, method (2) above has the disadvantage that the surface layer is made of acrylic resin, so it is easily scratched (and its characteristics change easily due to moisture absorption). It is difficult to apply a ΔR (anti-reflective) film that allows light incident on the lens to enter the lens without being reflected.
(発明が解決しようとする問題点)
上述したように、従来技術であるの〜■の方法は、特有
の欠点をもっている。そこで、本発明は、上記事情を勘
案してなされたもので、非球面あるいはフレネル型のレ
ンズを高精度かつ安価に製作することのできるレンズ及
びその製作方法を提供することを目的とする。(Problems to be Solved by the Invention) As described above, the prior art methods (2) to (2) have specific drawbacks. SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide a lens and a manufacturing method thereof that can manufacture an aspherical or Fresnel type lens with high precision and at low cost.
[発明の構成1
(問題点を解決するための手段と作用)レーザ光をガラ
スに照射してガラス表層を軟化させる第1工程と、この
第1工程後にガラスをプレス加工により所要のレンズ形
状に変形させたのら冷却する第2工程とからなり、高精
度かつ高能率で高性能のレンズの製作を可能どするよう
にしだらのである。[Structure 1 of the invention (Means and effects for solving the problems) A first step of irradiating glass with laser light to soften the surface layer of the glass, and after this first step, pressing the glass into the desired lens shape. It consists of a second step of deforming and then cooling, making it possible to manufacture high-performance lenses with high precision and efficiency.
(実施例)
以下、本発明の一実施例を図面(第1図及び第2図)を
参照して詳述する。(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings (FIGS. 1 and 2).
この実施例は、ガラスにより球面状のガラスレンズ1を
製作する第1工程と、このレンズ1の一方の表面2にC
Ozシレーア光3を照射し表層部4を軟化させる第2工
程と、(第2図参照)、レンズ1の他方の表面5を下型
6で保持さけ」−型7を矢印R方向に下降させることに
より軟化した表層部4を非球面にプレス加エリ−る第3
工程と(第2図参照)、このプレス加工したのらレンズ
1を冷IJ1する第4工程と、この冷却後に下型6から
上!ill 7をM間させレンズ1を取り出す第5工程
とからなっている。しかして、第1工程のレンズ1の製
作は、製作したい非球面レンズに近い球面レンズになる
ように実施する。また、第2工程にa3いてCOtレー
ザ光3を用いるのは、レンズ1の素材であるガラスは、
C0LLノーザ光3を90%以上の効率で吸収し、その
大半がガラス軟化に用いられるからである。また、プレ
ス加工のために軟化を要する表層部4の厚さは、非球面
8の球面9からのズレに対応して数10um以内である
。したがって、COzレーザ装置(図示せず。)からC
Ozレーザ光3を、例えばミラー10を介して支持台1
1に保ljlされているレンズ1に照射する。そうして
、深さ10μm程度まで軟化させ、軟化した表層部4を
形成する。さらに、第3工程における下型7は、レンズ
1の球面5に対応した凹部12を有している。また、上
型7には、非球面8をプレス成型するための凹部13が
設けられている。In this embodiment, the first step is to manufacture a spherical glass lens 1 from glass, and one surface 2 of this lens 1 is
A second step of softening the surface layer 4 by irradiating the Oz-Silea light 3 (see Fig. 2), and holding the other surface 5 of the lens 1 with a lower mold 6, lowering the mold 7 in the direction of arrow R. The third step is to press the softened surface layer 4 into an aspherical surface.
(see Fig. 2), a fourth step of cold IJ1 of this pressed lens 1, and after this cooling, from the lower mold 6 upward! It consists of a fifth step of moving ill 7 to M and taking out lens 1. Therefore, the manufacturing of the lens 1 in the first step is carried out so that it becomes a spherical lens similar to the aspherical lens to be manufactured. In addition, the reason why the COt laser beam 3 is used in the second step is because the glass that is the material of the lens 1 is
This is because it absorbs COLL nose light 3 with an efficiency of 90% or more, and most of it is used for glass softening. Further, the thickness of the surface layer portion 4 that needs to be softened for press working is within several tens of um, corresponding to the deviation of the aspherical surface 8 from the spherical surface 9. Therefore, C from a COz laser device (not shown)
The Oz laser beam 3 is transmitted to the support base 1 via a mirror 10, for example.
The lens 1, which is maintained at ljl, is irradiated. Then, it is softened to a depth of about 10 μm to form a softened surface layer portion 4. Further, the lower mold 7 in the third step has a recess 12 corresponding to the spherical surface 5 of the lens 1. Further, the upper die 7 is provided with a recess 13 for press-molding the aspherical surface 8.
以上のように、この実施例のレンズ及びその製作方法は
、ガラス一体のレンズのため、プラスチックレンズにく
らべ環境安定性に勝れている。よって、高温、高湿、低
温の雰囲気下において使用しても光学的性能の低下がほ
とんどない。また、深さ10t、1mの表層部4のみ軟
化させればよいので、第4工程である冷却に要する時間
が短かくてすむ。したがって、工数が低減し、生産能率
が向上かる。しかも、ガラス一体レンズであるため、1
!1巾防止用の保護膜をコートできる利点を有し、光学
部品としての特性向上につながる。As described above, the lens of this embodiment and its manufacturing method are superior in environmental stability compared to plastic lenses because they are integrated with glass. Therefore, there is almost no deterioration in optical performance even when used in high temperature, high humidity, and low temperature environments. Further, since it is only necessary to soften the surface layer 4 having a depth of 10t and 1m, the time required for the fourth step of cooling can be shortened. Therefore, the number of man-hours is reduced and production efficiency is improved. Moreover, since it is an integrated glass lens, 1
! It has the advantage of being able to be coated with a protective film for one-width protection, leading to improved characteristics as an optical component.
なお、上記実施例においては、非球面レンズ及びその装
作法を例示しているが、第3図に示ずような主として集
光用コンデン+ルンズとして用いられるフレネルレンズ
14の製作にも適用できろ。In the above embodiment, an aspherical lens and its mounting method are illustrated, but it can also be applied to the production of a Fresnel lens 14 mainly used as a condenser + lens for condensing light, as shown in FIG. reactor.
この、場合のガラスレンズ素材は、平板状ガラスでよい
。このフレネルレンズ14は、屈折面が連続した球面で
なく、屈折角が異なった階段・状の同心円からなってい
る。したがって、プレス成形用の上型の凹部にも、この
階段上の同心円を反転した溝が形成されている。さらに
、上記実施例においては、レンズ1の一方の表面2のみ
に非球面8をプレス成形するようにしているが、両側の
表面2.5に非球面8を形成するようにしてもよい。こ
の場合は、表面2への非球面のプレス成形後に、表面5
への非球面を行ってらよいし、両表面2.5に同時にC
otレーザレーザ光3を照射し、同特に非球面のプレス
成形を行うJ:うにしてもよい。さらに、使用するレー
ザ光は、COxレーザ光に限ることなく、l−1e −
N eレーザ光、アルゴンイオンレーザ光等、他のレー
ザ光を用いてもよい。さらに、上記実施例においては、
表層部は、軟化させるのみであるが、一部を溶融させて
もよい。The glass lens material in this case may be flat glass. This Fresnel lens 14 has a refracting surface that is not a continuous spherical surface but is made up of step-shaped concentric circles with different refractive angles. Therefore, the concave portion of the upper mold for press molding is also formed with grooves that are the inversion of the concentric circles on the steps. Further, in the above embodiment, the aspherical surface 8 is press-molded only on one surface 2 of the lens 1, but the aspherical surface 8 may be formed on both surfaces 2.5. In this case, after press forming the aspherical surface on surface 2, surface 5
It would be better to perform an aspherical surface on both surfaces 2.5 at the same time.
It is also possible to irradiate the ot laser with laser light 3 and perform press molding, especially an aspherical surface. Furthermore, the laser beam to be used is not limited to COx laser beam, but also l-1e −
Other laser beams such as Ne laser beam, argon ion laser beam, etc. may also be used. Furthermore, in the above embodiment,
Although the surface layer portion is only softened, a portion thereof may be melted.
[発明の効果]
本発明のレンズ及びその製作方法は、非球面レンズ、フ
レネルレンズ等の、従来、ガラスにて装作することが困
ff1llなレンズを、ガラス一体にて、高精度かつ高
能率で製作することができる。その結果、安定した光学
的性能、かつ耐久性を右する特殊な光学レンズの製作が
可能となる。[Effects of the Invention] The lens of the present invention and the method for manufacturing the same can be used to manufacture lenses, such as aspherical lenses and Fresnel lenses, which have conventionally been difficult to mount with glass, with high precision and high efficiency. It can be manufactured with. As a result, it becomes possible to manufacture a special optical lens that has stable optical performance and durability.
第1図及び第2図はこの発明の一実施例のレンズ及びそ
の製作方法の説明図、第3図はこの発明の他の実施例の
レンズ製作方法により製作されたフレネルレンズの断面
図である。
1ニガラスレンズ(レンズ素材)、3:COzOxレー
ザ光:表h4部、8:非球面、14:フレネルレンズ。
代1ILI入 ブr埋士 則近 憲1イi同
竹花喜久男1 and 2 are explanatory diagrams of a lens according to one embodiment of the present invention and its manufacturing method, and FIG. 3 is a sectional view of a Fresnel lens manufactured by a lens manufacturing method according to another embodiment of the present invention. . 1 glass lens (lens material), 3: COzOx laser light: surface h4 section, 8: aspherical surface, 14: Fresnel lens. 1st ILI entry burushi Norichika Ken 1st
Kikuo Takehana
Claims (5)
れプレス成形面をなす光学屈折面とを具備することを特
徴とするレンズ。(1) A lens comprising a main body made of glass and an optical refractive surface formed on the outside of the main body and serving as a press-molded surface.
部を軟化させる工程と、上記レンズ素材の軟化した表層
部をプレス成形により光学屈折面に成形する工程とから
なることを特徴とするレンズ製作方法。(2) It is characterized by comprising a step of irradiating a glass lens material with laser light to soften the surface layer, and a step of forming the softened surface layer of the lens material into an optical refractive surface by press molding. Lens manufacturing method.
請求の範囲第1項記載のレンズ製作方法。(3) The method for manufacturing a lens according to claim 1, wherein the optical refractive surface is an aspherical surface.
とする特許請求の範囲第1項記載のレンズ製作方法。(4) The method for manufacturing a lens according to claim 1, wherein the optical refractive surface is a Fresnel lens surface.
する特許請求の範囲第1項記載のレンズ製作方法。(5) The method for manufacturing a lens according to claim 1, wherein the laser beam is a carbon dioxide laser beam.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10311886A JPS62260103A (en) | 1986-05-07 | 1986-05-07 | Lens and its preparation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10311886A JPS62260103A (en) | 1986-05-07 | 1986-05-07 | Lens and its preparation |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS62260103A true JPS62260103A (en) | 1987-11-12 |
Family
ID=14345669
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10311886A Pending JPS62260103A (en) | 1986-05-07 | 1986-05-07 | Lens and its preparation |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS62260103A (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56144927A (en) * | 1980-04-14 | 1981-11-11 | Matsushita Electric Ind Co Ltd | Manufacture of fresnel lens |
JPS5749526A (en) * | 1980-09-08 | 1982-03-23 | Olympus Optical Co Ltd | Molding and correction of plastic lens |
JPS60118644A (en) * | 1983-11-29 | 1985-06-26 | Hoya Corp | Molding of press lenses |
JPS60205402A (en) * | 1984-03-29 | 1985-10-17 | Audio Technica Corp | Hybrid lens |
JPS60247212A (en) * | 1984-05-14 | 1985-12-06 | Alps Electric Co Ltd | Objective lens for optical pickup |
-
1986
- 1986-05-07 JP JP10311886A patent/JPS62260103A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56144927A (en) * | 1980-04-14 | 1981-11-11 | Matsushita Electric Ind Co Ltd | Manufacture of fresnel lens |
JPS5749526A (en) * | 1980-09-08 | 1982-03-23 | Olympus Optical Co Ltd | Molding and correction of plastic lens |
JPS60118644A (en) * | 1983-11-29 | 1985-06-26 | Hoya Corp | Molding of press lenses |
JPS60205402A (en) * | 1984-03-29 | 1985-10-17 | Audio Technica Corp | Hybrid lens |
JPS60247212A (en) * | 1984-05-14 | 1985-12-06 | Alps Electric Co Ltd | Objective lens for optical pickup |
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