JP3353958B2 - Optical element manufacturing method - Google Patents
Optical element manufacturing methodInfo
- Publication number
- JP3353958B2 JP3353958B2 JP20889693A JP20889693A JP3353958B2 JP 3353958 B2 JP3353958 B2 JP 3353958B2 JP 20889693 A JP20889693 A JP 20889693A JP 20889693 A JP20889693 A JP 20889693A JP 3353958 B2 JP3353958 B2 JP 3353958B2
- Authority
- JP
- Japan
- Prior art keywords
- glass material
- frame member
- glass
- sandwiched
- optical element
- 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 - Fee Related
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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Lens Barrels (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、加熱軟化したガラス素
材を一対の成形型で挟持して光学素子を成形する際、枠
部材を光学素子と一体的に成形する光学素子の製造方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an optical element in which a frame member is integrally formed with an optical element when a heat-softened glass material is sandwiched between a pair of molds to form an optical element.
【０００２】[0002]
【従来の技術】近年、ガラス素材を加熱炉内で加熱軟化
した後、一対の成形型で挟持成形する光学素子の製造方
法において、ガラス素材を保持して加熱炉内から一対の
成形型間に搬送する枠部材とガラス素材とを挟持成形時
に一体的に結合させることにより、光学機器の組立て時
に上記枠部材をレンズの組立て用の枠（鏡枠）として利
用できるようにした光学素子の製造方法が用いられてい
る。2. Description of the Related Art In recent years, a method of manufacturing an optical element in which a glass material is heated and softened in a heating furnace and then sandwiched and molded by a pair of molding dies. A method for manufacturing an optical element in which a frame member to be conveyed and a glass material are integrally joined at the time of pinching and molding, so that the frame member can be used as a frame (lens frame) for assembling a lens when assembling optical equipment. Is used.
【０００３】例えば、特開昭６２−２９１６０９号公報
には、ガラス素材を保持する枠部材の内周面に凹凸部を
形成し、ガラス素材を加熱軟化した後、一対の成形型に
より上下から挟持成形してガラス素材を外周方向に流動
させて上記凹凸部にガラス成形品を密着結合して一体的
に製造し、ガラス成形品の経時変化による枠部材との結
合が低下してもガラス成形品が枠部材から抜け落ちない
ようにした光学素子が提案されている。For example, Japanese Unexamined Patent Publication No. Sho 62-291609 discloses a method of forming an uneven portion on an inner peripheral surface of a frame member for holding a glass material, heating and softening the glass material, and holding the glass material from above and below by a pair of molding dies. The glass material is molded and flowed in the outer peripheral direction, and the glass molded product is tightly bonded to the above-mentioned uneven portion to be integrally manufactured. Even if the coupling with the frame member is reduced due to the aging of the glass molded product, the glass molded product is reduced. There has been proposed an optical element in which the optical element does not fall off the frame member.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記従
来の光学素子を製造する方法にあっては、枠部材の内面
に凹凸部を成すスペースが必要でありかつ外周方向にガ
ラス素材の大きな流動量が要求されるものであった。そ
して、挟持成形中に加熱軟化されたガラス素材が枠部材
の内面で冷却されて硬くなるため成形押し込み量が不足
して形状転写性が得にくいという問題点があった。However, in the above-mentioned conventional method for manufacturing an optical element, a space for forming an uneven portion on the inner surface of the frame member is required, and a large flow rate of the glass material in the outer peripheral direction is required. Was what was required. Then, the glass material heated and softened during the sandwich molding is cooled and hardened on the inner surface of the frame member, so that there is a problem that the molding press-in amount is insufficient and the shape transferability is difficult to obtain.
【０００５】また、枠部材の内周面に凹凸面を形成する
ために、鏡枠となる枠部材の寸法がどうしても大きなも
のとなるため、現実の光学機器組立て時に組立て用の枠
として使用することは困難であった。そのため、後加工
で削って枠部材を小さくする必要があった。In addition, since an uneven surface is formed on the inner peripheral surface of the frame member, the size of the frame member to be a mirror frame is inevitably increased. Was difficult. Therefore, it was necessary to reduce the size of the frame member by shaving in a post-process.
【０００６】さらに、両凸レンズのようにフチ肉が薄い
ガラス成形品の場合、枠部材の内周面に接する面積が小
さくなり、枠部際内面の凹部への流動が少なくなってガ
ラス成形品と枠部材との結合が不充分になるという問題
点があった。Furthermore, in the case of a glass molded product having thin borders, such as a biconvex lens, the area in contact with the inner peripheral surface of the frame member is reduced, and the flow to the concave portion on the inner surface near the frame is reduced, so that the glass molded product is reduced. There was a problem that the connection with the frame member was insufficient.
【０００７】本発明は、上記従来技術の問題点に鑑みて
なされたものであって、成形中における枠部材との接触
によるガラス素材の冷却を軽減して転写性を向上させる
ことができ、また、枠部材の寸法を小型化して後加工を
必要とせずに組立て用の枠として使用でき、かつ凸レン
ズのようにフチ肉の薄いガラス成形品であっても充分な
結合が得られる光学素子の製造方法を提供することを目
的とする。The present invention has been made in view of the above-mentioned problems of the prior art, and can reduce the cooling of a glass material due to contact with a frame member during molding to improve transferability. Production of an optical element that can be used as an assembly frame without the need for post-processing by reducing the dimensions of the frame member and that can achieve sufficient bonding even with a thin-walled glass molded product such as a convex lens The aim is to provide a method.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、本発明の光学素子の製造方法は、加熱軟化したガラ
ス素材を上下の成形型の成形面により挟持成形してなる
光学素子の製造方法において、枠部材の載置部上面にガ
ラス素材を載置して加熱軟化し、その表面張力により中
心側にガラス素材を集中させてこのガラス素材に枠部材
の載置部より下方に突出させた垂れ部を生じさせ、この
垂れ部を下型の成形面で持ち上げることにより前記載置
部の下方にガラス素材を回り込ませ、その後、上型と下
型の成形面によりガラス素材を挟持成形してガラス素材
の外周部で載置部の上下面を挟持させ、ガラス成形品と
枠部材とを一体的に結合することとした。また、本発明
の光学素子の製造方法は、加熱軟化したガラス素材を上
下の成形型の成形面により挟持成形してなる光学素子の
製造方法において、枠部材の載置部上面にガラス素材を
載置して加熱軟化し、その表面張力により中心側にガラ
ス素材を集中させてこのガラス素材に枠部材の載置部よ
り下方に突出させた垂れ部を生じさせ、この垂れ部を下
型の成形面で持ち上げることにより前記載置部の下方に
ガラス素材を回り込ませて載置部の上面側と下面側とを
ガラス素材で挟み込み、その後、上型と下型の成形面に
よりガラス素材を挟持成形してガラス素材の外周部で載
置部の上下面を挟持させ、ガラス成形品と枠部材とを一
体的に結合することとした。本発明の光学素子の製造方
法の例示としては、図１の概念図で例示して示すように
構成できる。まず、図１（ａ）に示すようにガラス素材
１を枠部材２の載置用突起部３上面に載置する。つぎ
に、図１（ｂ）に示すようにガラス素材１を加熱軟化し
てその表面張力により中心に集中させて表面を球状化さ
せることによって、ガラス素材１に載置用突起部３より
下方へ突出させた垂れ部４を生じさせる方法を取る。そ
の後、下型５を上昇させ、図１（ｃ）に示すように下型
５の成形面５ａで垂れ部４を抱え込むように持ち上げて
ガラス素材１のフチ部分７を外周方向に流動させ、載置
用突起部３の下方にガラス素材１を回り込ませる。ま
た、図１（ｄ）に示すように、上型６の成形面６ａとガ
ラス素材１の上面とを接触してガラス素材１を下型５と
上型６とにより挟持成形し、ガラス成形品８のフチ部分
７で上下共載置用突起部３を挟み込むようにしてガラス
成形品８と枠部材２とを一体的に結合する。In order to achieve the above-mentioned object, a method of manufacturing an optical element according to the present invention is directed to a method of manufacturing an optical element obtained by clamping a heat-softened glass material between upper and lower molding dies. In the method, the glass material is placed on the upper surface of the mounting portion of the frame member to be heated and softened, and the glass material is concentrated on the center side by the surface tension so that the glass material projects downward from the mounting portion of the frame member. A sagging portion is formed, and the sagging portion is lifted up by the lower mold forming surface to cause the glass material to go under the placing portion described above. Thereafter, the glass material is sandwiched and formed by the upper mold and the lower mold forming surfaces. Then, the upper and lower surfaces of the mounting portion are sandwiched between the outer peripheral portions of the glass material, and the glass molded product and the frame member are integrally connected. Further, in the method for manufacturing an optical element of the present invention, in the method for manufacturing an optical element in which a heat-softened glass material is sandwiched between upper and lower molding dies, the glass material is placed on the upper surface of the mounting portion of the frame member. The glass material is concentrated on the center side by the surface tension due to the surface tension, and a drooping portion that protrudes downward from the mounting portion of the frame member is generated in this glass material, and this drooping portion is formed into a lower mold The glass material is wrapped under the mounting part by lifting up the surface, and the upper and lower sides of the mounting part are sandwiched between the glass materials, and then the glass material is clamped and formed by the upper and lower mold surfaces. Then, the upper and lower surfaces of the mounting portion are sandwiched between the outer peripheral portions of the glass material, and the glass molded product and the frame member are integrally connected. As an example of the method for manufacturing the optical element of the present invention, the optical element can be configured as illustrated in the conceptual diagram of FIG. First, as shown in FIG. 1A, the glass material 1 is placed on the upper surface of the placing projection 3 of the frame member 2. Next, as shown in FIG. 1 (b), the glass material 1 is heated and softened and concentrated on the center by the surface tension to make the surface spherical, so that the glass material 1 is lowered from the mounting projection 3 on the glass material 1. A method of generating a protruding hanging portion 4 is adopted. Thereafter, the lower die 5 is raised, and the lower surface 5a of the lower die 5 is lifted so as to hold the hanging portion 4 as shown in FIG. The glass material 1 is wrapped under the mounting projection 3. Further, as shown in FIG. 1D, the molding surface 6a of the upper mold 6 and the upper surface of the glass material 1 are brought into contact with each other, and the glass material 1 is sandwiched between the lower mold 5 and the upper mold 6 to form a glass molded product. The glass molded article 8 and the frame member 2 are integrally connected so that the upper and lower co-mounting projections 3 are sandwiched between the edge portions 7 of 8.
【０００９】[0009]
【作用】上記製造方法によれば、図１（ｂ）に示すよう
に、ガラス素材１を加熱軟化してその表面張力により中
心に集中させて球状化し、垂れ部４を載置用突起部３よ
りも下方に突出させた後にガラス成形品に成形する方法
なので、枠部材２に設けた載置用突起部３の上下にガラ
ス素材１のフチ部分７が回り込んで載置部の上下面を喰
え込む形で形成されてガラス成形品が枠部材２に結合さ
れ、成形後に枠部材２を鏡枠として使用するに充分な結
合強度が得られる。また、ガラス成形品８と枠部材２と
は載置用突起部３における結合のため、ガラス素材１に
大きな流動を要せずに強固に結合されるとともに、ガラ
ス素材１と鏡枠部材２との接触面積が小さいので、枠部
材２からガラス素材１への熱的影響が小さくなり形状転
写性が損なわれない。According to the above-mentioned manufacturing method, as shown in FIG. 1B, the glass material 1 is softened by heating and concentrated at the center by the surface tension to form a sphere. Since it is a method of forming a glass molded product after projecting downward, the edge portion 7 of the glass material 1 goes around above and below the mounting projections 3 provided on the frame member 2 so that the upper and lower surfaces of the mounting portion are The glass molded product formed in the shape of bite is bonded to the frame member 2, and a bonding strength sufficient to use the frame member 2 as a lens frame after molding is obtained. Further, the glass molded article 8 and the frame member 2 are firmly connected without requiring a large flow to the glass material 1 because of the connection at the mounting projection 3, and the glass material 1 and the lens frame member 2 are joined together. Is small, the thermal effect from the frame member 2 to the glass material 1 is reduced, and the shape transferability is not impaired.
【００１０】[0010]
【実施例１】図２は、本発明の実施例１を示す工程図
で、図２（ａ）はガラス素材１の加熱軟化前を示す断面
図、図２（ｂ）はガラス素材１の加熱軟化状態を示す断
面図、図２（ｃ）はガラス素材１に対する上型６及び下
型５の接近途上状態を示す断面図、図２（ｄ）は上型６
と下型５によるガラス素材１の挟持成形状態を示す断面
図である。Embodiment 1 FIGS. 2A and 2B are process diagrams showing Embodiment 1 of the present invention, wherein FIG. 2A is a sectional view showing the glass material 1 before being softened by heating, and FIG. FIG. 2C is a cross-sectional view showing a softened state, FIG. 2C is a cross-sectional view showing a state in which the upper mold 6 and the lower mold 5 are approaching the glass material 1, and FIG.
FIG. 3 is a cross-sectional view showing a state in which a glass material 1 is sandwiched and formed by a lower mold 5.
【００１１】まず、図２（ａ）に示すように、ＳＫ１１
のガラス素材１（外径１０ｍｍ、厚さ２．５ｍｍ）をガ
ラス素材搬送用の枠部材２の内周面に形成した載置用突
起部３に載置する。この枠部材２は、材質にＷ−Ｃｒ−
Ｎｉ−Ｍｏの結合体あるいはステンレス系の合金を使用
し、その表面を気相でＴｉ−Ｎコートしたものが好適で
ある。また、載置用突起部３は、その載置幅が０．５〜
１ｍｍで内径がφ８〜９ｍｍ程度のものが良い。First, as shown in FIG.
The glass material 1 (outer diameter 10 mm, thickness 2.5 mm) is placed on the placing protrusion 3 formed on the inner peripheral surface of the glass material transporting frame member 2. The frame member 2 is made of W-Cr-
It is preferable to use a Ni-Mo combined body or a stainless steel alloy and coat the surface thereof with Ti-N in a gas phase. The mounting projection 3 has a mounting width of 0.5 to 0.5 mm.
It is preferable that the diameter is 1 mm and the inner diameter is about 8 to 9 mm.
【００１２】つぎに、ガラス素材１を８２０〜８８０℃
に加熱して軟化させ、ガラス素材１の表面張力によりガ
ラス素材１を球形状とし、図２（ｂ）に示すように、ガ
ラス素材１を中心に集中させて載置用突起部３にぶら下
がった状態で、ガラス素材１にその下部を載置用突起部
３より下方に大きく突出させた垂れ部４を形成する。Next, the glass material 1 is heated at 820-880 ° C.
Then, the glass material 1 was made into a spherical shape by the surface tension of the glass material 1, and as shown in FIG. 2B, the glass material 1 was concentrated on the center and hung on the mounting projection 3. In this state, a hanging portion 4 is formed on the glass material 1 so that the lower portion thereof protrudes greatly below the mounting projection 3.
【００１３】その後、下型５および上型６をガラス素材
１に接近させ、図２（ｃ）に示すように、下型５の成形
面５ａにより垂れ部４を下方から抱え込むように持ち上
げ、ガラス素材１のフチ部分７を外周方向に流動させて
載置用突起部３の下側にガラス素材１を回り込ませる。
この時の型温は５２０〜５４０℃が好適である。上記下
型５及び上型６は、型材にＷＣ系焼結体を用い、成形面
５ａ，６ａを鏡面に研磨してその表面を気相でＣｒ−Ｎ
コートしたものを使用している。After that, the lower mold 5 and the upper mold 6 are brought close to the glass material 1, and as shown in FIG. The edge portion 7 of the material 1 is caused to flow in the outer peripheral direction, and the glass material 1 is wrapped under the mounting projection 3.
The mold temperature at this time is preferably 520 to 540 ° C. The lower mold 5 and the upper mold 6 use a WC-based sintered body as a mold material, grind the molding surfaces 5a and 6a to mirror surfaces, and form Cr-N
Uses a coated one.
【００１４】さらに、下型５及び上型６により所定の押
圧力でガラス素材１を挟持し、図２（ｄ）に示すよう
に、ガラス素材１のフチ部分７が上下とも載置用突起部
３を挟み込むように成形する。そして、この状態で保持
しつつガラス温度が５００〜５３０℃になるまで冷却
し、適宜枠部材２の外周からＮ２等の不活性ガスを１ｋ
ｇｆ／ｃｍ２，６リットル／分，２０〜２４℃の状態で
吹き付けた後、ガラス成形品８から上下両型６，５を離
型開放する。Further, the glass material 1 is sandwiched between the lower mold 5 and the upper mold 6 with a predetermined pressing force, and as shown in FIG. 3 is sandwiched. While maintaining this state, the glass is cooled until the glass temperature becomes 500 to 530 ° C., and an inert gas such as N 2
After spraying in a state of gf / cm 2 , 6 liters / minute and 20 to 24 ° C., the upper and lower molds 6 and 5 are released from the glass molded product 8.
【００１５】本実施例によれば、枠部材２の載置用突起
部３のみをガラス素材１で喰え込んで枠部材３とガラス
成形品８を一体的に結合できるため、ガラス素材１の載
置用突起部３がそのままガラス成形品８と枠部材３との
接合部となり、ガラス素材１と枠部材２との接触面積を
小さくすることができる。このため、ガラス素材１に対
する枠部材２からの熱的影響が小さくなり、挟持成形時
における形状転写性がよくなる。また、ガラス素材１が
載置用突起部３を喰え込むのに大きな流動を必要とせず
に結合できるので、成形に用いるガラス素材１の量が成
形部分（レンズ部分）以外に１０〜２０％増した程度で
充分となる。さらに、ガラス素材１と枠部材２を結合す
る部分を小さくできるので枠部材２を必要以上に大きく
したり、あるいは内周面に結合用の凹凸部分を設ける必
要がなくなり、小型化が可能でコストも安価に製造する
ことができる。According to this embodiment, since only the mounting projections 3 of the frame member 2 are bitten by the glass material 1 and the frame member 3 and the glass molded product 8 can be integrally connected, the mounting of the glass material 1 is performed. The mounting projection 3 serves as a joint between the glass molded product 8 and the frame member 3 as it is, and the contact area between the glass material 1 and the frame member 2 can be reduced. For this reason, the thermal influence from the frame member 2 on the glass material 1 is reduced, and the shape transferability during the sandwich molding is improved. Further, since the glass material 1 can be bonded without requiring a large flow to bite the mounting projection 3, the amount of the glass material 1 used for molding is increased by 10 to 20% in addition to the molding portion (lens portion). This is enough. Further, since the portion for joining the glass material 1 and the frame member 2 can be made smaller, it is not necessary to make the frame member 2 larger than necessary or to provide a concave / convex portion for coupling on the inner peripheral surface. Can also be manufactured at low cost.
【００１６】[0016]
【実施例２】以下、図３に基づき本発明の実施例２を説
明する。図３はガラス素材１を加熱軟化した後、一対の
下型５と上型６により挟持成形した状態を示す断面図で
ある。本実施例では、搬送皿９の内周面に形成した段部
１０に枠部材１１を着脱自在に載置し、この枠部材１１
上に加熱前のガラス素材１を載置する。Second Embodiment A second embodiment of the present invention will be described below with reference to FIG. FIG. 3 is a cross-sectional view showing a state in which the glass material 1 has been softened by heating and then sandwiched and formed by a pair of a lower mold 5 and an upper mold 6. In the present embodiment, a frame member 11 is removably mounted on a step 10 formed on the inner peripheral surface of the transfer tray 9.
The glass material 1 before heating is placed thereon.
【００１７】つぎに、上記実施例１の同様に、ガラス素
材１を加熱軟化し、ガラス素材１の表面張力によりガラ
ス素材１を球形状として中心に集中させ、ガラス素材１
の下部に垂れ部を形成して枠部材１１の載置部（上記ガ
ラス素材を載置した枠部材１１の部位）の下方に垂れさ
せ、その後下型５と上型６とによりガラス素材１を挟持
成形して枠部材１１の載置部の上下に喰え込ませて、ガ
ラス成形品と枠部材１１とを一体的に結合する。そし
て、枠部材１１を搬送皿９から分離し、ガラス成形品を
枠部材１１とともに搬送皿９から取り出す。なお、その
他の製造方法、成形条件、その作用及びガラス素材１の
材料、枠部材１１の材料は上記実施例１と同様である。
また、搬送皿９は、材料にＷ−Ｃｒ−Ｎｉ−Ｍｏの焼結
体あるいはステンレス系の合金を用いてＴｉ−Ｎコート
を気相で施して形成してある。Next, as in the first embodiment, the glass material 1 is heated and softened, and the glass material 1 is concentrated into a spherical shape by the surface tension of the glass material 1.
Is formed at the lower part of the frame member 11 to hang below the mounting portion of the frame member 11 (the portion of the frame member 11 on which the glass material is mounted), and then the glass material 1 is moved by the lower mold 5 and the upper mold 6. The glass molded product and the frame member 11 are integrally joined by being sandwiched and formed so as to bite above and below the mounting portion of the frame member 11. Then, the frame member 11 is separated from the transfer plate 9, and the glass molded product is taken out from the transfer plate 9 together with the frame member 11. Other manufacturing methods, molding conditions, actions, materials of the glass material 1, and materials of the frame member 11 are the same as those in the first embodiment.
In addition, the transfer plate 9 is formed by applying a Ti-N coat in a gas phase using a sintered body of W-Cr-Ni-Mo or a stainless steel alloy as a material.
【００１８】本実施例によれば、搬送皿９と枠部材１１
とを別体としたので、搬送皿９からの光学素子の取り出
しが容易になり、また、枠部材１１の小型化を図ること
ができる。さらに、枠部材１１が別体であるため搬送皿
９とガラス素材１との接触面積を小さくできるので、搬
送皿９からの熱的影響を極小にできるため、ガラス成形
品の形状転写性が良好になる。According to the present embodiment, the transfer tray 9 and the frame member 11
Are separated from each other, so that the optical element can be easily taken out of the transport tray 9 and the size of the frame member 11 can be reduced. Further, since the frame member 11 is a separate body, the contact area between the transfer plate 9 and the glass material 1 can be reduced, so that the thermal influence from the transfer plate 9 can be minimized, so that the shape transferability of the glass molded product is good. become.
【００１９】[0019]
【実施例３】以下、図４に基づき本発明の実施例３を説
明する。図４はガラス素材１を加熱軟化した後、一対の
下型５と上型６により挟持成形した状態を示す断面図で
ある。本実施例は、上記実施例２と同様に、搬送皿９に
枠部材１２の分離自在に載置し、この枠部材１２にガラ
ス素材１を載置する構成としてある。Third Embodiment Hereinafter, a third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a cross-sectional view showing a state in which the glass material 1 has been softened by heating and then sandwiched and formed by a pair of a lower mold 5 and an upper mold 6. In the present embodiment, similarly to the second embodiment, the frame member 12 is placed on the transfer tray 9 so as to be detachable, and the glass material 1 is placed on the frame member 12.
【００２０】搬送皿９は、実施例２と同等形状に形成さ
れ、搬送用の形状（成形機の搬送装置に対応した外周及
び内周等の形状）及び枠部材１２を載置する段部１０
は、多品目に利用可能とすべく標準的な形状に形成され
ている。また、枠部材１２は、その内周面にガラス素材
１を載置しかつ結合するための突起部１３が設けられて
いる。また、枠部材１２の外周面には、鏡枠組立て時に
都合のよい組立用段部１４が形成され、ガラス成形品を
成形して搬送皿９から取り出し後、直ちに枠部材１２に
加工を施すことなく鏡枠に組立て得るようになってい
る。The transfer tray 9 is formed in the same shape as that of the second embodiment, and has a transfer shape (a shape such as an outer circumference and an inner circumference corresponding to a transfer device of a molding machine) and a step portion 10 on which the frame member 12 is placed.
Is formed in a standard shape so that it can be used for multiple items. In addition, the frame member 12 is provided with a projection 13 on the inner peripheral surface for mounting and joining the glass material 1. An assembling step 14 convenient for assembling the lens frame is formed on the outer peripheral surface of the frame member 12. Instead, they can be assembled into a lens frame.
【００２１】以下に、本実施例の製造方法を説明する
と、まず、搬送皿９の段部１０に枠部材１２を載置し、
枠部材１２の突起部１３上にガラス素材１を載置する。
あるいは、枠部材１２の突起部１３上にガラス素材１を
載置してこの枠部材１２を搬送皿９の段部１０に載置す
る。In the following, the manufacturing method of this embodiment will be described. First, the frame member 12 is placed on the step portion 10 of the transfer tray 9,
The glass material 1 is placed on the projection 13 of the frame member 12.
Alternatively, the glass material 1 is placed on the protrusion 13 of the frame member 12, and the frame member 12 is placed on the step 10 of the transport tray 9.
【００２２】つぎに、ガラス素材１を加熱軟化して、上
記各実施例と同様にガラス素材１の下部に垂れ部を形成
し、この垂れ部を枠部材１２の突起部１３より下方に突
出させる。その後、下型５と上型６とによりガラス素材
１を挟持成形してガラス素材１のフチ部分７を突起部１
３に喰え込ませ、実施例１と同様にガラス成形品と枠部
材１２とを一体的に結合する。そして、ガラス成形品を
枠部材１２とともに搬送皿９から取り出す。なお、その
他の製造方法、成形条件、その作用及びガラス素材１の
材料、枠部材１２の材料は上記実施例１と同様である。
また、搬送皿９は、その材料にＷ−Ｃｒ−Ｎｉ−Ｍｏの
焼結体あるいはステンレス系の合金を用いてＴｉ−Ｎコ
ートを気相で施して形成したものを使用するとよい。Next, the glass material 1 is heated and softened to form a hanging portion at the lower portion of the glass material 1 in the same manner as in each of the above embodiments, and this hanging portion is projected downward from the projection 13 of the frame member 12. . After that, the glass material 1 is sandwiched and formed by the lower mold 5 and the upper mold 6 so that the edge portion 7 of the glass material 1 is
3 and the glass molded article and the frame member 12 are integrally joined as in the first embodiment. Then, the glass molded product is taken out of the transfer tray 9 together with the frame member 12. Other manufacturing methods, molding conditions, actions, materials of the glass material 1, and materials of the frame member 12 are the same as those in the first embodiment.
Further, the transfer plate 9 is preferably formed by applying a Ti-N coat in the gas phase using a sintered body of W-Cr-Ni-Mo or a stainless steel alloy for the material.
【００２３】本実施例によれば、搬送皿９の繰り返し使
用が可能となり、また、外形寸法を同等にしその内径寸
法が異なる枠部材１２に変更することによって多品目の
多様なガラス成形品に対応できるため、製造上のコスト
が安価となる。さらに、枠部材１２の外周面に鏡枠組立
て時に都合のよい組立用段部１４を形成してあるので、
枠部材１２の外周加工工程が省略できる。そのため、成
形後直ちに組立て工程に入ることができ、組上がりまで
の経過日数を短縮することができる。その他の効果は上
記実施例１，２と同様である。According to the present embodiment, the transfer tray 9 can be used repeatedly. In addition, by changing the outer dimensions to be equal to the frame member 12 having different inner diameters, it is possible to cope with a wide variety of glass molded products. As a result, manufacturing costs are reduced. Further, since a convenient assembly step 14 is formed on the outer peripheral surface of the frame member 12 when assembling the lens frame,
The step of processing the outer periphery of the frame member 12 can be omitted. Therefore, the assembling process can be started immediately after molding, and the number of days elapsed until assembly can be reduced. Other effects are similar to those of the first and second embodiments.
【００２４】[0024]
【発明の効果】以上のように、本発明の光学素子の製造
方法によれば、ガラス素材が加熱軟化しその表面張力に
より中心側にガラス素材が集中して枠部材の載置部より
下方へ突出した垂れ部を生じさせ、そしてこの垂れ部を
下型の成形面で持ち上げて載置部の下方にガラス素材を
回り込ませているので、その後の上下型による成形時に
ガラス素材に大きな流動を必要としないから、ガラス素
材の量が少なくて良いものである。そしてガラス素材の
垂れ部を下型の成形面により持ち上げてガラス素材を載
置部の下方に回り込ませるので、上下型による成形前に
ガラス素材の外周部側と枠部材の内周面との接触が少な
くなっているから、枠部材との接触によるガラス素材の
熱的影響（冷却）が軽減され、よってガラス素材の形状
転写性を良好とすることができる。また、上下型による
成形によって載置部の上下面をガラス素材の外周部で挟
持して結合できるので結合部位が小さくて済み、枠部材
自体の小型化を図ることができるため、枠部材の熱的影
響を更に小さくができる。さらに、枠部材の小型化によ
り成形後における枠部材外形の研削加工工程を削減ある
いは廃止することができるため、製造工程省略により安
価に製造できる。また本発明の光学素子の製造方法によ
れば、上記枠部材の載置部より下方へ突出した垂れ部を
生じさせ、そしてこの垂れ部を下型の成形面で持ち上げ
て載置部の下方にガラス素材を回り込ませて載置部の上
面側と下面側とをガラス素材で挟み込んでいるので、上
記の製造方法の効果に加え、確実かつ十分な結合が、ガ
ラス成形品と枠部材との間で得られる。As described above, according to the optical element manufacturing method of the present invention, the glass material is heated and softened, and the glass material concentrates on the center side due to the surface tension thereof, so that the glass material moves downward from the mounting portion of the frame member. A protruding sag is created, and the sag is lifted by the lower mold surface and the glass material is wrapped under the mounting part. Therefore, the amount of the glass material may be small. Then, since the hanging part of the glass material is lifted by the molding surface of the lower mold and the glass material is wrapped under the mounting part, contact between the outer peripheral side of the glass material and the inner peripheral surface of the frame member before molding by the upper and lower molds. Is reduced, the thermal effect (cooling) of the glass material due to contact with the frame member is reduced, so that the shape transferability of the glass material can be improved. Further, since the upper and lower surfaces of the mounting portion can be sandwiched and joined by the outer peripheral portion of the glass material by molding with the upper and lower molds, the joining portion can be small, and the size of the frame member itself can be reduced. Influence can be further reduced. Furthermore, since the grinding process of the outer shape of the frame member after molding can be reduced or eliminated by downsizing the frame member, the manufacturing process can be omitted and the manufacturing cost can be reduced. Further, according to the method for manufacturing an optical element of the present invention, a hanging portion protruding downward from the mounting portion of the frame member is generated, and the hanging portion is lifted by the molding surface of the lower mold to be below the mounting portion. Since the glass material is wrapped around and the upper surface side and lower surface side of the mounting portion are sandwiched by the glass material, in addition to the effects of the above-described manufacturing method, a reliable and sufficient connection is made between the glass molded product and the frame member. Is obtained.
【図１】 本発明の製造工程を例示して示す概念図であ
る。FIG. 1 is a conceptual diagram illustrating a manufacturing process of the present invention.
【図２】本発明の実施例１の製造工程を概略的に示す断
面図である。FIG. 2 is a cross-sectional view schematically showing a manufacturing process according to the first embodiment of the present invention.
【図３】本発明の実施例２におけるガラス素材を上下両
型で挟持成形している工程を概略的に示す断面図であ
る。FIG. 3 is a cross-sectional view schematically showing a process of holding and molding a glass material in both upper and lower molds according to Embodiment 2 of the present invention.
【図４】本発明の実施例３におけるガラス素材を上下両
型で挟持成形している工程を概略的に示す断面図であ
る。FIG. 4 is a cross-sectional view schematically showing a step of holding and molding a glass material in both upper and lower molds according to Embodiment 3 of the present invention.
１ ガラス素材 ２ 枠部材 ３ 載置用突起部 ４ 垂れ部 ５ 下型 ６ 上型 ７ フチ部分 DESCRIPTION OF SYMBOLS 1 Glass material 2 Frame member 3 Mounting projection 4 Hanging part 5 Lower mold 6 Upper mold 7 Border part
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−265529（ＪＰ，Ａ) 特開 平３−167514（ＪＰ，Ａ) 特開 昭60−63743（ＪＰ，Ａ) 特開 昭63−40733（ＪＰ，Ａ) 特開 昭62−291609（ＪＰ，Ａ) 特開 平５−215949（ＪＰ，Ａ) 特開 平１−145338（ＪＰ，Ａ) 特開 平３−93632（ＪＰ，Ａ) 特開 平５−279056（ＪＰ，Ａ) 特開 平２−277006（ＪＰ，Ａ) 特開 昭63−38278（ＪＰ，Ａ) 特開 昭61−40828（ＪＰ，Ａ) 米国特許3582300（ＵＳ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G02B 7/02 G02B 3/00 C03B 11/00 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-265529 (JP, A) JP-A-3-167514 (JP, A) JP-A-60-63743 (JP, A) JP-A-63-63 40733 (JP, A) JP-A-62-291609 (JP, A) JP-A-5-215949 (JP, A) JP-A-1-145338 (JP, A) JP-A-3-93632 (JP, A) JP-A-5-279056 (JP, A) JP-A-2-277006 (JP, A) JP-A-63-38278 (JP, A) JP-A-61-40828 (JP, A) US Patent 3,882,300 (US, A) (58) Field surveyed (Int. Cl. 7 , DB name) G02B 7/02 G02B 3/00 C03B 11/00
Claims (2)
の成形面により挟持成形してなる光学素子の製造方法に
おいて、枠部材の載置部上面にガラス素材を載置して加
熱軟化し、その表面張力により中心側にガラス素材を集
中させてこのガラス素材に枠部材の載置部より下方に突
出させた垂れ部を生じさせ、この垂れ部を下型の成形面
で持ち上げることにより前記載置部の下方にガラス素材
を回り込ませ、その後、上型と下型の成形面によりガラ
ス素材を挟持成形してガラス素材の外周部で載置部の上
下面を挟持させ、ガラス成形品と枠部材とを一体的に結
合することを特徴とする光学素子の製造方法。In a method of manufacturing an optical element, wherein a glass material which has been heated and softened is sandwiched and formed between upper and lower molding dies, the glass material is placed on an upper surface of a mounting portion of a frame member to be softened by heating. The surface tension causes the glass material to concentrate on the center side to cause a drooping portion that protrudes downward from the mounting portion of the frame member on the glass material, and the drooping portion is lifted up by the lower mold forming surface. The glass material is wrapped under the placing part, and then the glass material is sandwiched and molded by the molding surfaces of the upper mold and the lower mold, and the upper and lower surfaces of the placing part are clamped by the outer periphery of the glass material, and the glass molded product and the frame are formed. A method for manufacturing an optical element, comprising integrally bonding a member.
の成形面により挟持成形してなる光学素子の製造方法に
おいて、枠部材の載置部上面にガラス素材を載置して加
熱軟化し、その表面張力により中心側にガラス素材を集
中させてこのガラス素材に枠部材の載置部より下方に突
出させた垂れ部を生じさせ、この垂れ部を下型の成形面
で持ち上げることにより前記載置部の下方にガラス素材
を回り込ませて載置部の上面側と下面側とをガラス素材
で挟み込み、その後、上型と下型の成形面によりガラス
素材を挟持成形してガラス素材の外周部で載置部の上下
面を挟持させ、ガラス成形品と枠部材とを一体的に結合
することを特徴とする光学素子の製造方法。2. A method for manufacturing an optical element, comprising heating and softening a glass material by sandwiching the glass material between upper and lower molding dies, placing the glass material on an upper surface of a mounting portion of a frame member, and heating and softening the glass material. The surface tension causes the glass material to concentrate on the center side to cause a drooping portion that protrudes downward from the mounting portion of the frame member on the glass material, and the drooping portion is lifted up by the lower mold forming surface. The upper and lower sides of the mounting part are sandwiched between the glass materials by wrapping the glass material under the mounting part, and then the glass material is sandwiched and molded by the molding surfaces of the upper mold and the lower mold to form an outer peripheral portion of the glass material. Wherein the upper and lower surfaces of the mounting portion are sandwiched between the glass member and the frame member and the frame member are integrally joined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20889693A JP3353958B2 (en) | 1993-07-30 | 1993-07-30 | Optical element manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20889693A JP3353958B2 (en) | 1993-07-30 | 1993-07-30 | Optical element manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0743575A JPH0743575A (en) | 1995-02-14 |
| JP3353958B2 true JP3353958B2 (en) | 2002-12-09 |
Family
ID=16563930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20889693A Expired - Fee Related JP3353958B2 (en) | 1993-07-30 | 1993-07-30 | Optical element manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3353958B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001350075A (en) * | 2000-06-07 | 2001-12-21 | Enplas Corp | Image pickup lens |
| JP2004271782A (en) * | 2003-03-07 | 2004-09-30 | Alps Electric Co Ltd | Optical device with holder |
| JP4231315B2 (en) * | 2003-03-25 | 2009-02-25 | アルプス電気株式会社 | Method for manufacturing optical element with holder |
| JP2007133197A (en) * | 2005-11-11 | 2007-05-31 | Olympus Corp | Optical component and its manufacture method |
-
1993
- 1993-07-30 JP JP20889693A patent/JP3353958B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0743575A (en) | 1995-02-14 |
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