JPH01319001A - Lens plate - Google Patents
Lens plateInfo
- Publication number
- JPH01319001A JPH01319001A JP15024988A JP15024988A JPH01319001A JP H01319001 A JPH01319001 A JP H01319001A JP 15024988 A JP15024988 A JP 15024988A JP 15024988 A JP15024988 A JP 15024988A JP H01319001 A JPH01319001 A JP H01319001A
- Authority
- JP
- Japan
- Prior art keywords
- lenses
- fiber plate
- lens
- plate rod
- heat resistance
- 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
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000835 fiber Substances 0.000 abstract description 11
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- 239000010453 quartz Substances 0.000 abstract description 5
- 238000005286 illumination Methods 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 3
- 230000004907 flux Effects 0.000 abstract description 3
- 230000003287 optical effect Effects 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 2
- 238000003466 welding Methods 0.000 abstract description 2
- 239000011295 pitch Substances 0.000 abstract 1
- 239000011521 glass Substances 0.000 description 5
- 230000005855 radiation Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000005337 ground glass Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
Landscapes
- Optical Couplings Of Light Guides (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は均一な照明を得るための光拡散光学系やコピー
機械の結像レンズ等として用いられるレンズプレートに
関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a lens plate used as a light diffusion optical system for obtaining uniform illumination, an imaging lens for copying machines, and the like.
（従来の技術）
従来この種のレンズプレートは、屈折率分布型レンズや
球面レンズを平面内に整列し、隣接するレンズ同志を接
着剤により固定したものや、プラスチック平板にイオン
拡散技術を用いて屈折率分布型レンズ群を形成したもの
であった。(Prior technology) Conventionally, this type of lens plate has been made by arranging gradient index lenses or spherical lenses in a plane and fixing adjacent lenses with adhesive, or by using ion diffusion technology on a plastic flat plate. It formed a group of refractive index gradient lenses.
（発明が解決しようとする課題）
前者のレンズプレートは材質が全ガラスではなく、プラ
スチックが存在するために、耐熱性や耐放射線性がプラ
スチックの特性に制限され、レンズに用いるガラスのｆ
ｆ１１ｍ特性まで活かすことができなかった。(Problem to be solved by the invention) The former lens plate is not made entirely of glass but contains plastic, so its heat resistance and radiation resistance are limited by the properties of plastic, and the f of the glass used for the lens is limited.
I couldn't take advantage of the f11m characteristics.
又、材料時１ｆ：、や気密性に関しても、例えばガラ支
と接着剤との線膨張係数が異なるために、ヒートサイク
ルによりレンズが割れたり、接着面に空隙が生じ、高い
気密信軌性も得られなかった。In addition, regarding material 1f: and airtightness, for example, because the linear expansion coefficients of the glass support and the adhesive are different, the lens may crack due to heat cycles or voids may form on the adhesive surface, resulting in high airtightness. I couldn't get it.
、後者のプラスチックレンズプレートにおいても、耐熱
性や長期的なレンズの光学特性の安定性は信鯨性の高い
ものではなかった。Even with the latter plastic lens plate, the heat resistance and long-term stability of the optical properties of the lens were not highly reliable.
（課題を解決するための手段）
本発明は上記の課題を解決しようとするもので、その概
略は以下に記載するとおりである。(Means for Solving the Problems) The present invention aims to solve the above problems, and the outline thereof is as described below.
石英系ガラスからなる屈折率分布型レンズであって、レ
ンズのピッチ数をｎとするときに０．１≦ｎ≦５を満足
するようなレンズの複数個を、−平面内に整列し、隣接
する各レンズが互に溶着しているレンズプレートである
。A plurality of lenses, which are gradient index lenses made of silica glass and satisfy 0.1≦n≦5, where n is the pitch number of the lenses, are arranged in a − plane and adjacent to each other. This is a lens plate in which each lens is welded together.
いま、これを図面を参照しつつ説明する。This will now be explained with reference to the drawings.
屈折率分布型石英系ガラス母Ｕ１ａの多数本を石英管２
内に挿入し、その周囲にトラバース可能なチャック３を
とりつけ、加熱炉４の中を進行させる。５は引取機で、
加熱炉４より引き出されたファイバプレートロッド６は
隣接するロッド同志が融着しながら全体に小径となりフ
ァイバプレートロッドが製造される。その後ファイバプ
レートロッドを所定の長さに切断し、両端を研磨して第
２図に示す如きファイバプレートロッドを得る。A large number of graded refractive index quartz-based glass matrices U1a are placed in a quartz tube 2.
A traversable chuck 3 is attached around it, and the heating furnace 4 is advanced. 5 is a collection machine,
The fiber plate rod 6 pulled out from the heating furnace 4 becomes smaller in diameter as a whole while adjoining rods are fused together to produce a fiber plate rod. Thereafter, the fiber plate rod is cut to a predetermined length and both ends are polished to obtain a fiber plate rod as shown in FIG.
すなわち屈折率分布型レンズ（コア）ｌｂの多数本はク
ラッド溶着フしている。２は石英管である。That is, many of the gradient index lenses (cores) lb are welded to the cladding. 2 is a quartz tube.
（作 用）
上記の本発明による屈折率分布型レンズの屈折率分布を
示せば第３図のとおりである。(Function) The refractive index distribution of the above-mentioned gradient index lens according to the present invention is shown in FIG. 3.
ここに屈折率ｎ （Ｔ）は次式で表わされる。Here, the refractive index n (T) is expressed by the following formula.
ただしｎｏ ：軸上屈折率。However, no: On-axis refractive index.
Δ：比屈折率差。Δ: relative refractive index difference.
ａ：コア半径 を表わす。a: Represents core radius.
又（１）式のベキ数αはレンズの特性を考えるとαζ２
が適当である。Also, the power number α in equation (1) is αζ2 considering the characteristics of the lens.
is appropriate.
次にレンズのピッチ数ｎは次式え与えられる。Next, the pitch number n of the lens is given by the following formula.
ｎ冨ｆｆ、／７’Ｘ／２πａ ・・・・・・・・・・・
・・・・ （２）ただしｌはｔ／ンズ長（即ぢレンズプ
レート厚）ここでレンズ特性を考えるとピッチ数ｎは０
．１≦ｎ≦５ ・・・・・・・・・・・・・・・・・
・・・・・・・ （３）が適当である。nTomiff, /7'X/2πa ・・・・・・・・・・・・
(2) However, l is t/lens length (in other words, lens plate thickness). Considering the lens characteristics, the pitch number n is 0.
．． 1≦n≦5 ・・・・・・・・・・・・・・・・・・
......(3) is appropriate.
（実施例）
本発明のレンズプレートを用いた照射例は第４図に示す
とおりで、ランプ１１はＴ４ａ１２に接続され、その背
面側には集光ミラー１３が設けられている。(Example) An example of irradiation using the lens plate of the present invention is as shown in FIG. 4, in which the lamp 11 is connected to T4a12, and a condensing mirror 13 is provided on the back side thereof.
ランプ１１の前方には集光レンズ１４が設けられ、その
前方の最少錯乱円の位置にはレンズプレート１５が配置
され、その前方には被写体照射面１６が配置されている
。A condensing lens 14 is provided in front of the lamp 11, a lens plate 15 is disposed in front of the condensing lens 14 at the position of the circle of least confusion, and a subject irradiation surface 16 is disposed in front of the condensing lens 14.
は集光ミラー１３で反射され、ランプ１１の前方の集光
レンズ１４に至り集光されたレンズプレート１５に例は
第５図（Ａ）のとおりであって、第５図（Ｂ）に示すよ
うに照射面１６には゛プラグの電極やフィラメントの像
が投影され、均一な照明が得られない。is reflected by the condensing mirror 13, reaches the condensing lens 14 in front of the lamp 11, and is focused on the lens plate 15, as shown in FIG. 5(A) and as shown in FIG. 5(B). As a result, images of the electrodes and filaments of the plug are projected onto the irradiation surface 16, making it impossible to obtain uniform illumination.
なお第４図の最小錯乱円の位置にスリガラス等の拡散板
を入れると、均一性は入れない時よりも改善されるが光
が散乱してしまい照射面での光量が低下する。スリガラ
スにおけるスリの程度を細かくすれば光量上がるが、均
一性が悪くなる。If a diffuser plate made of ground glass or the like is inserted at the position of the circle of least confusion in FIG. 4, the uniformity will be improved compared to when the diffuser plate is not inserted, but the light will be scattered and the amount of light on the irradiated surface will be reduced. If the degree of scratching on the ground glass is made finer, the amount of light will increase, but the uniformity will deteriorate.
（発明の効果）
本発明によれば、レンズプレートが全石英系ガラスのた
めに、耐熱性に優れ、光束の最小錯乱円の位置に冷却の
必要なく容易に置くことができる。(Effects of the Invention) According to the present invention, since the lens plate is made entirely of silica glass, it has excellent heat resistance and can be easily placed at the position of the circle of least confusion of the luminous flux without the need for cooling.
このため、効率の良い均−照明系を形成することができ
る。Therefore, an efficient uniform illumination system can be formed.
従来のレンズプレートでは大出力ランプになると冷却の
必要を生じたり、最小錯乱円の位置からズラしてエネル
ギ密度の低い位置にレンズプレートを置く等の対処がな
されていたため照明の効率が悪かったがこのような難点
はない。Conventional lens plates required cooling for high-output lamps, or the lens plate was moved from the position of the circle of least confusion to a position with low energy density, resulting in poor lighting efficiency. There are no such difficulties.
又、本発明では石英系ガラスを主材としているので耐放
射線性に非常に優れていた材料構成も可能なため、原子
カプラントや放射線装置、宇宙空間等放射線雰囲気でも
使用できる利点がある。In addition, since the present invention uses quartz glass as the main material, it is possible to construct a material with extremely high radiation resistance, which has the advantage of being usable in radiation atmospheres such as atomic couplants, radiation equipment, and outer space.
第１図は本発明のファイバプレートの製造方法の一部切
断簡略説明図、第２図は本発明のファイバプレートの一
部省略断面図、第３図は屈折率分布型レンズの屈折率分
布を示すグラフ、第４図は本発明のレンズプレートを使
用した状態の光線図、第５図（Ａ）はレンズプレートを
使用しない場合の光線図、同図（Ｂ）は（Ａ）図のＡＡ
’矢視図である。
主な符号の説明
ｌａ・・・ガラス母材、１ｂ・・・屈折率分布型レンズ
（コア）、２・・・石英管、３・・・チャック、４・・
・加熱炉、５・・・引取機、６・・・ファイバプレート
ロッド、７・・・クラッド溶着、１１・・・ランプ、１
２・・・電源、１３・・・集光ミラー、１４・・・集光
レンズ、１５・・・レンズプレート、工６・・・被写耐
照射面、１７・・・光束代理人 弁理士 竹 内
守
第１図
第２図Fig. 1 is a partially cutaway simplified explanatory diagram of the method for manufacturing a fiber plate of the present invention, Fig. 2 is a partially omitted cross-sectional view of the fiber plate of the present invention, and Fig. 3 shows the refractive index distribution of a gradient index lens. 4 is a ray diagram when the lens plate of the present invention is used, FIG. 5 (A) is a ray diagram when the lens plate is not used, and FIG. 5 (B) is the AA of FIG.
'This is an arrow view. Explanation of main symbols la...Glass base material, 1b...Gradient index lens (core), 2...Quartz tube, 3...Chuck, 4...
・Heating furnace, 5... Taking machine, 6... Fiber plate rod, 7... Clad welding, 11... Lamp, 1
2... Power supply, 13... Condensing mirror, 14... Condensing lens, 15... Lens plate, Work 6... Subject irradiation-resistant surface, 17... Luminous flux agent Patent attorney Bamboo Inside
Mamoru 1st figure 2nd figure
Claims (1)
する石英系ガラスからなる屈折率分布型レンズの複数個
が、一平面内に整列し、隣接する各レンズが互に溶着し
ていることを特徴とするレンズプレート。A plurality of graded refractive index lenses made of silica glass satisfying 0.1≦n≦5, where n is the pitch number of lenses, are aligned in one plane, and adjacent lenses are welded to each other. A lens plate characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15024988A JPH01319001A (en) | 1988-06-20 | 1988-06-20 | Lens plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15024988A JPH01319001A (en) | 1988-06-20 | 1988-06-20 | Lens plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01319001A true JPH01319001A (en) | 1989-12-25 |
Family
ID=15492819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15024988A Pending JPH01319001A (en) | 1988-06-20 | 1988-06-20 | Lens plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01319001A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002001289A1 (en) * | 2000-06-28 | 2002-01-03 | Seiko Epson Corporation | Projector |
-
1988
- 1988-06-20 JP JP15024988A patent/JPH01319001A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002001289A1 (en) * | 2000-06-28 | 2002-01-03 | Seiko Epson Corporation | Projector |
| US6805444B2 (en) | 2000-06-28 | 2004-10-19 | Seiko Epson Corporation | Projector comprising an optical component having a rock crystal member |
| US6811262B2 (en) | 2000-06-28 | 2004-11-02 | Seiko Epson Corporation | Projector comprising an optical component having a rock crystal member |
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