JPH09194222A - Molding method for glass optical element and its molding method - Google Patents
Molding method for glass optical element and its molding methodInfo
- Publication number
- JPH09194222A JPH09194222A JP766596A JP766596A JPH09194222A JP H09194222 A JPH09194222 A JP H09194222A JP 766596 A JP766596 A JP 766596A JP 766596 A JP766596 A JP 766596A JP H09194222 A JPH09194222 A JP H09194222A
- Authority
- JP
- Japan
- Prior art keywords
- molding
- preform
- glass
- frame body
- frame
- 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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/79—Uniting product and product holder during pressing, e.g. lens and lens holder
Abstract
Description
【０００１】[0001]
【技術分野】本発明は、ガラス光学素子のモールド方法
及びその成形素子に関する。TECHNICAL FIELD The present invention relates to a method of molding a glass optical element and a molded element thereof.
【０００２】[0002]
【従来技術及びその問題点】ガラスモールド法は、基本
的にプリフォームを加熱軟化させた状態で上下の金型で
挟着し、該金型の形状をプリフォームに転写する成形法
である。円形のレンズの成形では、必要外径より若干大
径に成形し、成形後、芯取りにより周縁一部を除去（切
除）している。この従来の成形法は、成形後に精密な芯
出し加工を不可欠とするため、作業性が悪く、コストが
高い。特に微小レンズは、高精度の芯出し加工が要求さ
れるので、その加工が困難であり、一層のコストアップ
を招いていた。2. Description of the Related Art The glass molding method is basically a molding method in which a preform is heated and softened and sandwiched between upper and lower molds, and the shape of the mold is transferred to the preform. In molding a circular lens, the diameter is slightly larger than the required outer diameter, and after molding, a part of the peripheral edge is removed (cut) by centering. This conventional molding method requires precise centering after molding, resulting in poor workability and high cost. In particular, since minute lenses require high-precision centering processing, the processing is difficult, resulting in further cost increase.
【０００３】特開平３−１６７５１４号公報は、成形後
の芯出し作業を実質的に不要とするモールド方法を提案
している。この成形方法は、上下の金型の突き合わせ面
の周囲に、円環状の金属製ホルダを置き、金型で成形さ
れるガラス材料の周縁をこの金属製ホルダに密着結合す
る方法である。このモールド方法は、円環状の金属製ホ
ルダに一体にされたガラス素子をそのまま用いることが
できるため、芯出し作業が不要となる。ところが、この
モールド方法は、円環状の金属製ホルダの金属材料とし
て適当なものがなく、実質的に実用化が困難である。す
なわち、上記公報中には、金属ホルダの材質は、ガラス
材との高温融着性、金属キャリアとの溶接特性、及び熱
膨張係数の面から選択されると記載され、具体的には、
Ｆｅ−Ｎｉ合金が例示されている。しかし、ガラスモー
ルド法は成形温度が高いため、さらに成形温度に対する
耐酸化性が要求されるのに対し、Ｆｅ−Ｎｉ合金は、表
面酸化しやすいという問題がある。これらの要求をバラ
ンスよく備えた金属材料は、実質的にＷＣやＭｏ合金に
限定されるが、これらは高価であるばかりか、比重が大
きいため、レンズ鏡枠には不向きである。Japanese Unexamined Patent Publication No. 3-167514 proposes a molding method that substantially eliminates the need for centering work after molding. This molding method is a method in which an annular metal holder is placed around the abutting surfaces of the upper and lower molds, and the peripheral edge of the glass material molded by the mold is closely bonded to the metal holder. In this molding method, since the glass element integrated with the annular metal holder can be used as it is, the centering work is unnecessary. However, this molding method is practically difficult because there is no suitable metal material for the annular metal holder. That is, in the above publication, the material of the metal holder is described as being selected from the viewpoints of high-temperature fusion property with a glass material, welding characteristics with a metal carrier, and a coefficient of thermal expansion, and specifically,
An Fe-Ni alloy is exemplified. However, since the glass molding method has a high molding temperature, oxidation resistance to the molding temperature is further required, whereas the Fe-Ni alloy has a problem that the surface is easily oxidized. Metallic materials that meet these requirements in good balance are practically limited to WC and Mo alloys, but they are not suitable for lens barrels because they are expensive and have a large specific gravity.
【０００４】[0004]
【発明の目的】本発明は、成形後の芯出し作業を実質的
に不要とすることができるガラス光学素子の成形方法で
あって、さらに材料の自由度が高い成形方法を得ること
を目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a molding method for a glass optical element which can substantially eliminate the need for centering work after molding, and which has a high degree of freedom in materials. To do.
【０００５】[0005]
【発明の概要】本発明は、特開平３−１６７５１４号公
報で提案された、成形後の芯出し作業を実質的に不要と
するモールド方法において、その金属ホルダに代わる材
質として、特定のガラス材またはセラミック材が好まし
いことを見出して完成されたものである。本発明は、ガ
ラスモールド用の上型と下型の突き合わせ面の周囲に、
環状の枠体を配置し、上型と下型の間においたプリフォ
ームを加熱軟化させ、該上型と下型により成形してその
周縁を上記枠体の内面に密着結合させるガラス光学素子
のモールド方法であって、枠体を、プリフォームの成形
温度以上の転移点を有するガラス材料、または同成形温
度以上の使用温度を持つセラミック材料から構成したこ
とを特徴としている。この構成によると、枠体が、プリ
フォームの成形温度以上の転移点を有するガラス材料、
または同成形温度以上の使用温度を持つセラミック材料
からなるため、プリフォームのモールド時に、枠体の軟
化変形や表面酸化がなく、プリフォームを成形して枠体
に密着結合することができる。プリフォームの成形温度
以上の転移点を有するガラス材料、または同成形温度以
上の使用温度を持つセラミック材料は、多数存在するか
ら、材料選択の自由度が高い。SUMMARY OF THE INVENTION The present invention is a molding method proposed in Japanese Patent Application Laid-Open No. 3-167514, which substantially eliminates the need for centering work after molding, and a specific glass material as a material replacing the metal holder. Alternatively, it has been completed by finding that a ceramic material is preferable. The present invention, around the abutting surface of the upper mold and the lower mold for the glass mold,
A glass optical element in which an annular frame is arranged, the preform placed between the upper mold and the lower mold is softened by heating, and the peripheral edge thereof is closely bonded to the inner surface of the frame by molding with the upper mold and the lower mold. The molding method is characterized in that the frame body is made of a glass material having a transition point equal to or higher than the molding temperature of the preform, or a ceramic material having a working temperature equal to or higher than the molding temperature. According to this configuration, the frame body is a glass material having a transition point equal to or higher than the molding temperature of the preform,
Alternatively, since it is made of a ceramic material having a working temperature equal to or higher than the molding temperature, the preform can be molded and tightly bonded to the frame without softening deformation or surface oxidation of the frame during molding of the preform. Since there are many glass materials having a transition temperature equal to or higher than the molding temperature of the preform or ceramic materials having a use temperature equal to or higher than the molding temperature, the degree of freedom in material selection is high.
【０００６】本発明方法では、一般的には、成形時に成
形温度によって膨張する枠体が冷却後に中心ガラス要素
とより強く密着するように、枠体が、プリフォームと同
等かこれより大きい熱膨張係数を有することが好まし
い。しかし、枠体の内周面に、中心ガラス要素との結合
性を高める環状溝または粗面を設ける場合には、逆に、
枠体が、プリフォームと同等かこれより小さい熱膨張係
数を有する場合にも適用できる。In the method of the present invention, the frame body generally has a thermal expansion equal to or larger than that of the preform so that the frame body, which expands due to the molding temperature during molding, comes into closer contact with the central glass element after cooling. It is preferable to have a coefficient. However, in the case where the inner peripheral surface of the frame body is provided with an annular groove or a rough surface for enhancing the bondability with the central glass element, conversely,
It can also be applied when the frame body has a thermal expansion coefficient equal to or smaller than that of the preform.
【０００７】枠体は、モールド時に中心のガラス要素と
一体に成形されるから、この枠体を金型からの取り出し
や、搬送の際のキャリアとして使用し、さらにレンズ鏡
筒への組込時には、そのままレンズ鏡枠として使用する
ことができる。Since the frame body is formed integrally with the central glass element during molding, the frame body is used as a carrier for taking out from the mold and for carrying, and when it is assembled in the lens barrel. , Can be used as it is as a lens frame.
【０００８】従って本発明によるガラス光学素子は、環
状の枠体と、この枠体内にガラスモールドされて該枠体
に一体化された中心ガラス要素とからなるガラス成形素
子であって、枠体は、中心ガラス要素の成形温度以上の
転移点を有するガラス材料、またはセラミック材料から
なることを特徴としている。枠体の形状は、円環状が最
も一般的であるが、本発明は、円環状以外の形状の枠体
にも原理的に適用可能である。Therefore, the glass optical element according to the present invention is a glass molding element comprising an annular frame body and a central glass element glass-molded in the frame body and integrated with the frame body. It is characterized by being made of a glass material or a ceramic material having a transition point higher than the molding temperature of the central glass element. The most general shape of the frame is an annular shape, but the present invention can also be applied in principle to a frame having a shape other than the annular shape.
【０００９】[0009]
【発明の実施の形態】図１ないし図５は、本発明方法の
第一の実施例を示している。円環状枠体２０は、プリフ
ォーム１０の成形温度以上の転移点を有するガラス材
料、または同成形温度以上の使用温度を持つセラミック
材料からなっており、予め高精度の円環状に加工されて
いる。この円環状枠体２０は、その内周面に、粗面２１
を有している。粗面２１の面粗さＲmax は、１〜１０μ
ｍ程度が好ましい。この円環状枠体２０は、下型１３の
成形面１３ａの周囲に形成した環状載置台１３ｂ上に、
該下型１３と上型１４との突き合わせ面周囲に位置させ
てセットされる。1 to 5 show a first embodiment of the method of the present invention. The annular frame body 20 is made of a glass material having a transition point equal to or higher than the molding temperature of the preform 10 or a ceramic material having an operating temperature equal to or higher than the molding temperature, and is preliminarily processed into a highly accurate annular shape. . The annular frame 20 has a rough surface 21 on its inner peripheral surface.
have. The surface roughness R max of the rough surface 21 is 1 to 10 μm.
About m is preferable. This annular frame 20 is mounted on an annular mounting table 13b formed around the molding surface 13a of the lower mold 13,
The lower die 13 and the upper die 14 are set so as to be located around the abutting surface of the upper die 14.
【００１０】下型１３、上型１４は、ＷＣ（タングステ
ンカーバイド）、ＳｉＣ（炭化珪素）、Ｓｉ3 Ｎ4 （窒
化珪素）などの耐熱性に優れた材料から構成され、プリ
フォーム１０と接触する接触面には、離型性を確保する
ために、白金系、ＤＬＣ（ダイヤモンドライクカーボ
ン）、Ｃｒ2 Ｏ3 （酸化クロム）などの保護膜が形成さ
れている。The lower mold 13 and the upper mold 14 are made of a material having excellent heat resistance such as WC (tungsten carbide), SiC (silicon carbide), and Si 3 N 4 (silicon nitride), and come into contact with the preform 10. A protective film made of platinum, DLC (diamond-like carbon), Cr 2 O 3 (chromium oxide) or the like is formed on the contact surface in order to ensure releasability.
【００１１】下型１３上に置かれたプリフォーム１０
は、軟化温度迄加熱され、その軟化状態で、常法に従っ
て上型１４が下型１３に対して接近し、成形面１４ａと
成形面１３ａとの間で、プリフォーム１０が成形され
る。上型１４には、下型１３の環状載置台１３ｂと対向
する、円環状枠体２０の逃げ凹部１４ｂが形成されてい
る。Preform 10 placed on lower mold 13
Is heated to the softening temperature, and in the softened state, the upper mold 14 approaches the lower mold 13 according to a conventional method, and the preform 10 is molded between the molding surface 14a and the molding surface 13a. The upper mold 14 is formed with an escape recess 14b of the annular frame 20 that faces the annular mounting table 13b of the lower mold 13.
【００１２】このガラスモールドに際しては、プリフォ
ーム１０は、押し潰されて成形面１４ａと成形面１３ａ
の突き合わせ面から外方に突出し、円環状枠体２０の粗
面２１と密着する。軟化状態にあるプリフォーム１０
は、粗面２１の粗面の凹凸内に入り込み、ガラス自体の
持つ接着性により円環状枠体２０と接合される。プリフ
ォーム１０が成形された中心ガラス要素１０’は、やが
て冷却されると、図５に模式的に示すように、収縮して
成形面１３ａ、１４ａから離型する。円環状枠体２０の
熱膨張係数がプリフォーム１０の熱膨張係数より大きけ
れば、この冷却（収縮）の際、円環状枠体２０が中心ガ
ラス要素１０’を締め付ける傾向となり、両者が強固に
結合される。At the time of this glass molding, the preform 10 is crushed to be molded into a molding surface 14a and a molding surface 13a.
From the abutting surface of the above, and comes into close contact with the rough surface 21 of the annular frame body 20. Preform 10 in a softened state
Enters into the irregularities of the rough surface of the rough surface 21 and is bonded to the annular frame body 20 by the adhesiveness of the glass itself. When the central glass element 10 'on which the preform 10 is molded is cooled down, it contracts and is released from the molding surfaces 13a and 14a as schematically shown in FIG. If the coefficient of thermal expansion of the annular frame body 20 is larger than that of the preform 10, the annular frame body 20 tends to tighten the central glass element 10 'during this cooling (contraction), and the two are firmly bonded. To be done.
【００１３】図６ないし図１０は、本発明方法の第二の
実施例を示している。円環状枠体円環状枠体２０は、そ
の内周面に、環状溝２２を有している。この環状溝２２
の深さは、成形時にプリフォーム１０が進入して円環状
枠体２０に結合される深さであればよい。また環状溝２
２の内面は、粗面とすることもできる。6 to 10 show a second embodiment of the method of the present invention. The annular frame body 20 has an annular groove 22 on its inner peripheral surface. This annular groove 22
The depth may be the depth at which the preform 10 enters and is joined to the annular frame body 20 during molding. Also the annular groove 2
The inner surface of 2 may be roughened.
【００１４】この実施例においては、第一の実施例と同
様に、プリフォーム１０を軟化温度迄加熱して成形する
と、押し潰されて成形面１４ａと成形面１３ａの突き合
わせ面から外方に突出するプリフォーム１０が、円環状
枠体２０の環状溝２２内に入り込み、ガラス自体の持つ
接着性により該環状溝２２（円環状枠体２０）と接合さ
れる。プリフォーム１０が成形された中心ガラス要素１
０’は、やがて冷却されると、図１０に模式的に示すよ
うに、収縮して成形面１３ａ、１４ａから離型する。こ
の実施例においても、円環状枠体２０の熱膨張係数がプ
リフォーム１０の熱膨張係数より大きければ、この冷却
（収縮）の際、円環状枠体２０が中心ガラス要素１０’
を締め付ける傾向となり、両者が強固に結合される。し
かし、この実施例においては、逆に、円環状枠体２０の
熱膨張係数がプリフォーム１０の熱膨張係数より若干小
さいとしても、環状溝２２に中心ガラス要素１０’が入
り込むため、一定の保持作用を得ることができる。In this embodiment, as in the first embodiment, when the preform 10 is heated to the softening temperature and molded, it is crushed and protrudes outward from the abutting surface between the molding surface 14a and the molding surface 13a. The preform 10 enters into the annular groove 22 of the annular frame 20 and is bonded to the annular groove 22 (annular frame 20) by the adhesiveness of the glass itself. Central glass element 1 with preform 10 molded
When 0'is eventually cooled, it contracts and releases from the molding surfaces 13a and 14a, as schematically shown in FIG. Also in this embodiment, if the thermal expansion coefficient of the annular frame body 20 is larger than the thermal expansion coefficient of the preform 10, the annular frame body 20 will be the central glass element 10 ′ during this cooling (contraction).
Will tend to be tightened, and both will be firmly joined. However, in this embodiment, conversely, even if the coefficient of thermal expansion of the annular frame body 20 is slightly smaller than that of the preform 10, the central glass element 10 ′ enters the annular groove 22, so that a constant holding is achieved. The action can be obtained.
【００１５】[0015]
【実施例】次に具体的な実施例を３例説明する。 ［実施例１］ プリフォーム１０の材質；Ｆ２（Ｔｇ（転移点）＝４３
５℃、Ａｔ（屈伏点）＝４８０℃、成形温度＝５０５
℃、α（熱膨張係数；１００−３００℃）＝１０１×１
０-7／Ｋ）。 円環状枠体２０の材質；Ｌ６（Ｔｇ（転移点）＝５９５
℃、Ａｔ（屈伏点）＝６３５℃、α（熱膨張係数；１０
０−３００℃）＝１０８×１０-7／Ｋ、内径１５ｍｍ
φ、外径１６ｍｍφ、内周面に面粗さＲmax ５μｍの粗
面２１を形成） 正確に計量されたプリフォーム１０と円環状枠体２０を
図２のようにセットし、加熱（５０５℃）押圧成形する
ことにより、図３、図４のようなガラス光学素子を得
た。その後、冷却すると、プリフォーム１０と円環状枠
体２０の熱膨張係数の差により、円環状枠体２０が成形
された中心ガラス要素１０’を締め付ける傾向となり、
強固な結合が得られた。円環状枠体２０の形状は、成形
の前後で変化せず、芯取りを必要としなかった。また、
成形後の取り出し、搬送の際には、中心ガラス要素１
０’に触れることなく、円環状枠体２０を掴むことがで
き、中心ガラス要素１０’に触れることによる光学的な
不良は発生しなかった。EXAMPLES Next, three specific examples will be described. [Example 1] Material of preform 10; F2 (Tg (transition point) = 43)
5 ° C, At (yield point) = 480 ° C, molding temperature = 505
℃, α (coefficient of thermal expansion; 100-300 ℃) = 101 × 1
0-7 / K). Material of the annular frame 20; L6 (Tg (transition point) = 595
℃, At (yield point) = 635 ℃, α (coefficient of thermal expansion; 10
0-300 ° C) = 108 × 10 −7 / K, inner diameter 15 mm
φ, outer diameter 16 mmφ, rough surface 21 with surface roughness R max of 5 μm is formed on the inner peripheral surface) Preform 10 and annular frame 20 which are accurately weighed are set as shown in FIG. 2 and heated (505 ° C.) ) By press molding, a glass optical element as shown in FIGS. 3 and 4 was obtained. After that, when cooled, the difference in thermal expansion coefficient between the preform 10 and the annular frame body 20 tends to tighten the central glass element 10 ′ on which the annular frame body 20 is molded,
A strong bond was obtained. The shape of the annular frame 20 did not change before and after molding, and did not require centering. Also,
The central glass element 1 is used for taking out and conveying after molding.
The annular frame body 20 could be grasped without touching 0 ', and no optical defect due to touching the central glass element 10' occurred.
【００１６】［実施例２］ プリフォーム１０の材質；ＰＢＫ４０（Ｔｇ（転移点）
＝５０１℃、Ａｔ（屈伏点）＝５４９℃、成形温度＝５
７５℃、α（熱膨張係数；１００−３００℃）＝７３×
１０-7／Ｋ） 円環状枠体２０の材質；ＺｎＯ2 （最高使用温度＝１０
００℃、α（熱膨張係数；１００−３００℃）＝８３×
１０-7／Ｋ、内径２０ｍｍφ、外径２２ｍｍφ、内周面
に幅１．５ｍｍ、深さ０．５ｍｍの環状溝２２を形成） 以上のプリフォーム１０と円環状枠体２０を図７のよう
にセットし、加熱（５７５℃）押圧成形することによ
り、図８、図９のようなガラス光学素子を得た。その
後、冷却すると、プリフォーム１０と円環状枠体２０の
熱膨張係数の差により、円環状枠体２０が成形された中
心ガラス要素１０’を締め付ける傾向となり、強固な結
合が得られた。この実施例で特徴的なことは、セラミッ
ク製の円環状枠体２０は、高い耐熱性を持つため、耐熱
性に注意を払う必要がないという点である。Example 2 Material of preform 10; PBK40 (Tg (transition point)
= 501 ° C, At (yield point) = 549 ° C, molding temperature = 5
75 ° C., α (coefficient of thermal expansion; 100-300 ° C.) = 73 ×
10 −7 / K) Material of the annular frame 20; ZnO 2 (maximum operating temperature = 10
00 ° C., α (coefficient of thermal expansion; 100-300 ° C.) = 83 ×
An annular groove 22 having a diameter of 10 −7 / K, an inner diameter of 20 mmφ, an outer diameter of 22 mmφ and a width of 1.5 mm and a depth of 0.5 mm is formed on the inner peripheral surface.) The preform 10 and the annular frame body 20 as shown in FIG. Then, the glass optical element as shown in FIGS. 8 and 9 was obtained by heating and pressing at 575 ° C. After that, when cooled, the difference in thermal expansion coefficient between the preform 10 and the annular frame body 20 tended to tighten the central glass element 10 'on which the annular frame body 20 was formed, and a strong bond was obtained. A feature of this embodiment is that the ceramic annular frame body 20 has high heat resistance, and therefore it is not necessary to pay attention to heat resistance.
【００１７】［実施例３］ プリフォーム１０の材質；ＬａＳＦ０８（Ｔｇ（転移
点）＝７３０℃、Ａｔ（屈伏点）＝７６１℃、成形温度
＝７８５℃、α（熱膨張係数；１００−３００℃）＝７
９×１０-7／Ｋ） 円環状枠体２０の材質；Ａｌ2 Ｏ3 （最高使用温度＝１
６００℃、α（熱膨張係数；１００−３００℃）＝７０
×１０-7／Ｋ、内径２８ｍｍ、外径３１ｍｍ、内周面に
幅２ｍｍ、深さ０．８ｍｍの環状溝２２を形成） 以上のプリフォーム１０と円環状枠体２０を図７のよう
にセットし、加熱（７８５℃）押圧成形することによ
り、図８、図９のようなガラス光学素子を得た。この実
施例で特徴的なことは、プリフォーム１０より円環状枠
体２０の方がαが小さいにも拘らず、中心ガラス要素１
０’を円環状枠体２０に強固に接合できた点である。こ
れは、円環状枠体２０の内面に環状溝２２を形成したこ
とによる効果であると考えられる。また７８５℃という
高温成形でも、Ａｌ2 Ｏ3 からなる円環状枠体２０は、
全く変形しなかった。Example 3 Material of preform 10; LaSF08 (Tg (transition point) = 730 ° C., At (yield point) = 761 ° C., molding temperature = 785 ° C., α (coefficient of thermal expansion; 100-300 ° C.) ) = 7
9 × 10 −7 / K) Material of the annular frame 20; Al 2 O 3 (maximum operating temperature = 1
600 ° C, α (coefficient of thermal expansion; 100-300 ° C) = 70
An annular groove 22 having a diameter of 10 −7 / K, an inner diameter of 28 mm, an outer diameter of 31 mm and a width of 2 mm and a depth of 0.8 mm is formed on the inner peripheral surface.) The preform 10 and the annular frame body 20 as shown in FIG. The glass optical element as shown in FIGS. 8 and 9 was obtained by setting and heating (785 ° C.) press molding. A characteristic of this embodiment is that although the annular frame 20 has a smaller α than the preform 10, the central glass element 1 has
This is that 0'can be firmly joined to the annular frame 20. This is considered to be the effect of forming the annular groove 22 on the inner surface of the annular frame 20. Even at a high temperature of 785 ° C., the annular frame 20 made of Al 2 O 3 is
It did not deform at all.
【００１８】[0018]
【発明の効果】以上のように本発明によれば、成形後の
芯出し作業が実質的に不要なガラス光学素子及びその成
形方法が得られるだけでなく、ガラス材料及び枠体の材
料として選択の自由度が広がる。よって、設計の可能性
が拡大し、種々の用途に本発明の光学素子を適用するこ
とができる。As described above, according to the present invention, it is possible to obtain not only a glass optical element and a method for molding the same that substantially eliminate the need for centering work after molding, but also select as a glass material and a material for the frame. The degree of freedom of Therefore, the possibility of design is expanded, and the optical element of the present invention can be applied to various uses.
【図１】本発明の光学素子の成形方法に用いる枠体の第
一の例を示す斜視図である。FIG. 1 is a perspective view showing a first example of a frame body used in a method for molding an optical element of the present invention.
【図２】図１の枠体を用いて光学素子を成形する際のプ
リフォーム成形前の縦断面図である。FIG. 2 is a vertical cross-sectional view before preform molding when molding an optical element using the frame body of FIG.
【図３】同成形後の縦断面図である。FIG. 3 is a vertical cross-sectional view after the molding.
【図４】図３のIV部拡大図である。FIG. 4 is an enlarged view of a part IV in FIG. 3;
【図５】成形中と成形（冷却）後の状態の変化を模式的
に示す拡大断面図である。FIG. 5 is an enlarged cross-sectional view schematically showing changes in a state during molding and after molding (cooling).
【図６】本発明の光学素子の成形方法に用いる枠体の第
二の例を示す斜視図である。FIG. 6 is a perspective view showing a second example of a frame body used in the optical element molding method of the present invention.
【図７】図６の枠体を用いて光学素子を成形する際のプ
リフォーム成形前の縦断面図である。7 is a vertical cross-sectional view before forming a preform when an optical element is formed using the frame body of FIG.
【図８】同成形後の縦断面図である。FIG. 8 is a vertical cross-sectional view after the molding.
【図９】図８のIX部拡大図である。FIG. 9 is an enlarged view of a portion IX of FIG. 8;
【図１０】成形中と成形（冷却）後の状態の変化を模式
的に示す拡大断面図である。FIG. 10 is an enlarged cross-sectional view schematically showing changes in a state during molding and after molding (cooling).
１０ プリフォーム １０’ 中心ガラス要素 １３ 下型 １４ 上型 ２０ 円環状枠体 ２１ 粗面 ２２ 環状溝 10 preform 10 'central glass element 13 lower mold 14 upper mold 20 annular frame 21 rough surface 22 annular groove
Claims (6)
わせ面の周囲に、枠体を配置し、 上記上型と下型の間においたプリフォームを加熱軟化さ
せ、該上型と下型により成形してその周縁を上記枠体の
内面に密着結合させるガラス光学素子のモールド方法で
あって、 上記枠体を、プリフォームの成形温度以上の転移点を有
するガラス材料、または同成形温度以上の使用温度を持
つセラミック材料から構成したことを特徴とするガラス
光学素子のモールド方法。1. A frame body is arranged around the abutting surfaces of the upper mold and the lower mold for glass molding, and the preform placed between the upper mold and the lower mold is softened by heating, and the upper mold and the lower mold. A method of molding a glass optical element, wherein the peripheral edge is closely bonded to the inner surface of the frame body by molding with a glass material having a transition point equal to or higher than the molding temperature of the preform, or equal to or higher than the molding temperature. A method for molding a glass optical element, which is characterized in that it is made of a ceramic material having an operating temperature of.
ムと同等かこれより大きい熱膨張係数を有するモールド
方法。2. The molding method according to claim 1, wherein the frame has a coefficient of thermal expansion equal to or higher than that of the preform.
プリフォームの密着部位に、環状溝が形成されているモ
ールド方法。3. The inner peripheral surface of the frame body according to claim 1,
A molding method in which an annular groove is formed in the close contact part of the preform.
なくともプリフォームの密着部位が粗面であるモールド
方法。4. The molding method according to claim 1, wherein at least an inner peripheral surface of the frame body has a rough surface at a contact portion of the preform.
リフォームと同等かこれより小さい熱膨張係数を有する
モールド方法。5. The molding method according to claim 3, wherein the frame has a coefficient of thermal expansion equal to or smaller than that of the preform.
ルドされて該枠体に一体化された中心ガラス要素とから
なるガラス成形素子であって、上記枠体は、中心ガラス
要素の成形温度以上の転移点を有するガラス材料、また
はセラミック材料からなることを特徴とするガラス光学
素子。6. A glass molding element comprising an annular frame body and a central glass element glass-molded in the frame body and integrated with the frame body, wherein the frame body is a molding of the central glass element. A glass optical element comprising a glass material or a ceramic material having a transition point equal to or higher than a temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP766596A JPH09194222A (en) | 1996-01-19 | 1996-01-19 | Molding method for glass optical element and its molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP766596A JPH09194222A (en) | 1996-01-19 | 1996-01-19 | Molding method for glass optical element and its molding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09194222A true JPH09194222A (en) | 1997-07-29 |
Family
ID=11672112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP766596A Pending JPH09194222A (en) | 1996-01-19 | 1996-01-19 | Molding method for glass optical element and its molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09194222A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000241720A (en) * | 1999-02-18 | 2000-09-08 | Asahi Optical Co Ltd | Micro-lens system for endoscope |
| JP2003104738A (en) * | 2001-09-27 | 2003-04-09 | Fuji Photo Optical Co Ltd | Mold for forming optical element with lens barrel |
| JP2008256938A (en) * | 2007-04-04 | 2008-10-23 | Olympus Corp | Optical component and method for manufacturing optical component |
| JP2009080500A (en) * | 2008-12-05 | 2009-04-16 | Canon Inc | Molded lens with aperture diaphragm |
| JP2009280454A (en) * | 2008-05-23 | 2009-12-03 | Olympus Corp | Producing method of optical device and its manufacturing apparatus |
| JP5634615B2 (en) * | 2011-09-30 | 2014-12-03 | 富士フイルム株式会社 | Lens and lens molding method |
-
1996
- 1996-01-19 JP JP766596A patent/JPH09194222A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000241720A (en) * | 1999-02-18 | 2000-09-08 | Asahi Optical Co Ltd | Micro-lens system for endoscope |
| JP2003104738A (en) * | 2001-09-27 | 2003-04-09 | Fuji Photo Optical Co Ltd | Mold for forming optical element with lens barrel |
| JP4573485B2 (en) * | 2001-09-27 | 2010-11-04 | 富士フイルム株式会社 | Mold for optical element with lens barrel |
| JP2008256938A (en) * | 2007-04-04 | 2008-10-23 | Olympus Corp | Optical component and method for manufacturing optical component |
| JP2009280454A (en) * | 2008-05-23 | 2009-12-03 | Olympus Corp | Producing method of optical device and its manufacturing apparatus |
| JP2009080500A (en) * | 2008-12-05 | 2009-04-16 | Canon Inc | Molded lens with aperture diaphragm |
| JP5634615B2 (en) * | 2011-09-30 | 2014-12-03 | 富士フイルム株式会社 | Lens and lens molding method |
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