JPS6349615B2 - - Google Patents
Info
- Publication number
- JPS6349615B2 JPS6349615B2 JP56076881A JP7688181A JPS6349615B2 JP S6349615 B2 JPS6349615 B2 JP S6349615B2 JP 56076881 A JP56076881 A JP 56076881A JP 7688181 A JP7688181 A JP 7688181A JP S6349615 B2 JPS6349615 B2 JP S6349615B2
- Authority
- JP
- Japan
- Prior art keywords
- lens
- lens barrel
- peripheral edge
- recess
- barrel
- 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
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 239000004925 Acrylic resin Substances 0.000 claims description 6
- 229920000178 Acrylic resin Polymers 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 229920003002 synthetic resin Polymers 0.000 claims description 4
- 239000000057 synthetic resin Substances 0.000 claims description 4
- 229920001169 thermoplastic Polymers 0.000 claims 1
- 239000004416 thermosoftening plastic Substances 0.000 claims 1
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000000465 moulding Methods 0.000 description 3
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
Description
【発明の詳細な説明】
本発明は、TVカメラ等における対物レンズの
製造法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an objective lens for a TV camera or the like.
近来、VTRの発達に伴い小型TVカメラも多
大な発展を遂げているが、現在なお、種々の観点
から研究開発が進められている。 In recent years, along with the development of VTRs, compact TV cameras have also made great progress, and research and development is still progressing from various perspectives.
本発明の目的は、そうしたことの一環として、
対物レンズの軽量化、簡素化、小型化、組立ての
容易化及び迅速化、コストダウンを図り、もつて
小型TVカメラの携帯を容易ならしめると共に、
価格を低廉ならしめようとすることにある。 As part of the purpose of the present invention,
We aim to make the objective lens lighter, simpler, smaller, easier and faster to assemble, and reduce costs, making it easier to carry a small TV camera.
The aim is to keep prices low.
従来の小型TVカメラの対物レンズは、一般の
カメラと同様に、レンズが、鏡筒内に嵌め込まれ
て、鏡筒に螺合されたリングにより締付け固定さ
れているのが普通である。 The objective lens of a conventional compact TV camera is usually fitted into a lens barrel and fixed by a ring screwed onto the lens barrel, as in a general camera.
上述の目的に徴すれば、斯様に面倒なことをせ
ずに、単に、レンズを鏡筒に接着できれば好都合
である。 In view of the above-mentioned purpose, it would be advantageous if the lens could simply be glued to the lens barrel without such trouble.
しかし、接着剤を用いて接着したのでは、接着
剤がはみだすことや接着の不手際等から、接着剤
がレンズの作用面に付着することがあり、また、
レンズの位置ずれや接着ミスを生じ易い。更に、
鏡筒内の接着面を、各種の曲率を有する種々のレ
ンズの縁部に合致させることは容易なことでな
い。 However, if adhesive is used for bonding, the adhesive may stick to the working surface of the lens due to the adhesive extruding or due to poor adhesion.
Lens misalignment and adhesion errors are likely to occur. Furthermore,
It is not easy to match the adhesive surface within the lens barrel to the edges of various lenses having various curvatures.
この点、鏡筒を合成樹脂成形し、その際、レン
ズを鏡筒にインサートすれば、そのような不都合
を回避できるが、そうすると、レンズに疵が入つ
たり、金型が高価になつた、手数がかかつたり、
かえつて問題が多い。 In this regard, such inconveniences can be avoided by molding the lens barrel with synthetic resin and inserting the lens into the lens barrel, but this may result in scratches on the lens or an expensive mold. It takes a lot of work,
On the contrary, there are many problems.
本発明は、これらのことを考慮しながら研究開
発を進め、最良の接着手段を開発し、所期の目的
を達成したものである。 The present invention has been developed by conducting research and development while taking these matters into consideration, developing the best adhesive means, and achieving the intended purpose.
以下、図示の実施例について説明する。 The illustrated embodiment will be described below.
第１図は、小型TVカメラの対物レンズの一例
を示す斜視図であり、１は、レンズ、２は、該レ
ンズを内装し接着した鏡筒である。 FIG. 1 is a perspective view showing an example of an objective lens of a small TV camera, where 1 is a lens, and 2 is a lens barrel to which the lens is mounted and bonded.
第２図のＡ乃至Ｄは、その第１図の対物レンズ
の製造行程を示している。 A to D in FIG. 2 show the manufacturing process of the objective lens in FIG. 1.
而して、まず、Ａに示すように、レンズ１と鏡
筒２とを合成樹脂により個別に造る。レンズ１
は、透明アクリル樹脂により射出成形し、鏡筒２
は、黒色ABS樹脂により射出成形する。また、
レンズ１は、成形後に特に加工することなくその
まま使用できよう所定の曲率半径を有する完成品
の姿に成形し、鏡筒２は、外観的には完成品の姿
にするが、内周のレンズ取付け部分において、レ
ンズの周縁部が入る凹所２１を形成すると共に、
該凹所内に段状膨出部２２を周設する。なお、鏡
筒材料は、熱可塑性樹脂であればよく、ABS樹
脂以外のものでもよい。 First, as shown in A, the lens 1 and the lens barrel 2 are made separately from synthetic resin. lens 1
is injection molded from transparent acrylic resin, and the lens barrel 2 is made of transparent acrylic resin.
is injection molded from black ABS resin. Also,
The lens 1 is molded into a finished product with a predetermined radius of curvature so that it can be used as is without any special processing after molding, and the lens barrel 2 has the appearance of a finished product, but the inner lens At the attachment part, a recess 21 is formed into which the peripheral edge of the lens fits, and
A stepped bulge 22 is provided around the recess. Note that the lens barrel material may be any thermoplastic resin, and may be other than ABS resin.
次に、Ｂ、Ｃに示すように、レンズ１を、上面
に緩衝材４１を有する超音波接着装置のアンビル
４上に載せ、該アンビルの周りに配した鏡筒用の
治具５に鏡筒２を載せると共に、鏡筒２の凹所２
１をレンズ１の周縁部に合わせ、該鏡筒２を同装
置のホーン３で押圧しつつ超音波振動を与える。
この超音波振動は、例えば、周波数19.3KHz、時
間0.6秒とする。 Next, as shown in B and C, the lens 1 is placed on an anvil 4 of an ultrasonic bonding device having a cushioning material 41 on the upper surface, and the lens barrel is attached to a lens barrel jig 5 arranged around the anvil. 2, as well as recess 2 of lens barrel 2.
1 to the peripheral edge of the lens 1, and apply ultrasonic vibration to the lens barrel 2 while pressing it with the horn 3 of the same device.
This ultrasonic vibration has a frequency of 19.3 KHz and a time of 0.6 seconds, for example.
こうすると、その超音波振動によつてレンズの
周縁部と鏡筒の段状膨出部２２との間で発熱を生
じ、段状膨出部２２が溶解変形してレンズの周縁
部に倣い、また、レンズの周縁部も表面において
溶解し、従つて、Ｄに示すように、レンズの周縁
部と鏡筒の凹所２１とで緊密な超音波接着が得ら
れる。 In this case, the ultrasonic vibration generates heat between the peripheral edge of the lens and the stepped bulging part 22 of the lens barrel, and the stepped bulging part 22 melts and deforms to follow the peripheral edge of the lens. Further, the peripheral edge of the lens is also melted on the surface, and therefore, as shown in D, a tight ultrasonic bond is obtained between the peripheral edge of the lens and the recess 21 of the lens barrel.
ところで、透明なアクリル樹脂は、光透過率、
屈折率等において、硝子に劣らない光学的性質を
有し、また、割れ難く、軽量であり、従つて、ア
クリル樹脂の射出成形によるレンズは、成形によ
る利点も加わつて種々の面でかなり優れたものと
なる。 By the way, transparent acrylic resin has light transmittance,
It has optical properties comparable to glass in terms of refractive index, etc., and is also difficult to break and lightweight. Therefore, lenses made by injection molding of acrylic resin are considerably superior in various aspects due to the advantages of molding. Become something.
また、そのアクリル樹脂製レンズの表面に、シ
リコン樹脂、シリコン・アクリル共重合樹脂の透
明塗料を塗布し、焼付け硬化処理すると、表面硬
度が助長され、表面に疵が付き難くなつて、硝子
のものよりもむしろ優秀なものとなる。 In addition, by applying a transparent paint made of silicone resin or silicone-acrylic copolymer resin to the surface of the acrylic resin lens and baking it to harden it, the surface hardness is promoted and the surface becomes less prone to scratches. It will be better than that.
本発明によれば、全体を合成樹脂製とすること
ができ、光学的にも、構造的にも、従来のものよ
りも優れたものにすることができ、軽量化、簡素
化、小型化、組立ての容易化及び迅速化、コスト
ダウンが得られ、小型TVカメラの携帯を容易な
らしめることができると共に、価格を低廉ならし
めることができる。 According to the present invention, the entire body can be made of synthetic resin, and it can be made optically and structurally superior to conventional ones, and it can be made lighter, simpler, smaller, and Assembling can be facilitated and speeded up, and costs can be reduced, making it easier to carry a small TV camera and lowering the price.
図面は、本発明の実施例で、第１図は、小型
TVカメラの一例の斜視図、第２図は、製造行程
の説明図である。
１…レンズ、２…鏡筒、３…ホーン、４…アン
ビル。
The drawings show an embodiment of the present invention, and FIG. 1 shows a small-sized
FIG. 2, a perspective view of an example of a TV camera, is an explanatory diagram of the manufacturing process. 1...lens, 2...lens barrel, 3...horn, 4...anvil.
Claims (1)
を熱可塑性の適宜な黒色合成樹脂でそれぞれ射出
成形し、鏡筒には内周にレンズの周縁部が入る凹
所を形成すると共に、該凹所内に段状膨出部を周
設し、レンズの周縁部を鏡筒の凹所へ挿入して段
状膨出部へ向け加圧すると同時に鏡筒へ超音波振
動を与え、該超音波振動により段状膨出部をレン
ズの周縁部に倣わせるよう溶解変形させつつその
レンズの周縁部と溶着させることを特徴とする
TVカメラ等における対物レンズの製造法。1. The lens is made of transparent acrylic resin, and the lens barrel is made of an appropriate black thermoplastic synthetic resin.The lens barrel is formed with a recess on the inner periphery into which the peripheral edge of the lens is inserted, and the recess is formed in the recess. A stepped bulge is provided around the lens barrel, the peripheral edge of the lens is inserted into the recess of the lens barrel, pressure is applied toward the stepped bulge, and at the same time ultrasonic vibrations are applied to the lens barrel. The step-shaped bulge is melted and deformed so as to follow the peripheral edge of the lens while being welded to the peripheral edge of the lens.
A manufacturing method for objective lenses for TV cameras, etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7688181A JPS57191023A (en) | 1981-05-20 | 1981-05-20 | Manufacture of object lens tv camera, etc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7688181A JPS57191023A (en) | 1981-05-20 | 1981-05-20 | Manufacture of object lens tv camera, etc |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57191023A JPS57191023A (en) | 1982-11-24 |
| JPS6349615B2 true JPS6349615B2 (en) | 1988-10-05 |
Family
ID=13617971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7688181A Granted JPS57191023A (en) | 1981-05-20 | 1981-05-20 | Manufacture of object lens tv camera, etc |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57191023A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61284723A (en) * | 1985-06-11 | 1986-12-15 | Fuji Koki Seisakusho:Kk | Magnifying glass and its manufacture |
| JP3207530B2 (en) * | 1992-06-30 | 2001-09-10 | 阿波エンジニアリング株式会社 | Optical disc manufacturing method |
| CN105014853B (en) * | 2015-08-03 | 2017-03-29 | 江苏瑞尔光学有限公司 | A kind of resin lens casting mold die opening mechanism |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3399477A (en) * | 1964-12-30 | 1968-09-03 | Elastic Stop Nut Corp | Reflectorized indicia |
| JPS493848A (en) * | 1972-05-04 | 1974-01-14 | ||
| JPS5313449A (en) * | 1976-07-23 | 1978-02-07 | Hitachi Ltd | Interface circuit |
| JPS5781217A (en) * | 1980-11-08 | 1982-05-21 | Konishiroku Photo Ind Co Ltd | Method for fitting lens to resin lens frame |
| JPS57146629A (en) * | 1981-03-09 | 1982-09-10 | Hitachi Ltd | Correction of plastic lens |
-
1981
- 1981-05-20 JP JP7688181A patent/JPS57191023A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3399477A (en) * | 1964-12-30 | 1968-09-03 | Elastic Stop Nut Corp | Reflectorized indicia |
| JPS493848A (en) * | 1972-05-04 | 1974-01-14 | ||
| JPS5313449A (en) * | 1976-07-23 | 1978-02-07 | Hitachi Ltd | Interface circuit |
| JPS5781217A (en) * | 1980-11-08 | 1982-05-21 | Konishiroku Photo Ind Co Ltd | Method for fitting lens to resin lens frame |
| JPS57146629A (en) * | 1981-03-09 | 1982-09-10 | Hitachi Ltd | Correction of plastic lens |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57191023A (en) | 1982-11-24 |
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