JPH0194327A - Light converging thin film waveguide for automatic focusing - Google Patents
Light converging thin film waveguide for automatic focusingInfo
- Publication number
- JPH0194327A JPH0194327A JP25300587A JP25300587A JPH0194327A JP H0194327 A JPH0194327 A JP H0194327A JP 25300587 A JP25300587 A JP 25300587A JP 25300587 A JP25300587 A JP 25300587A JP H0194327 A JPH0194327 A JP H0194327A
- Authority
- JP
- Japan
- Prior art keywords
- thin film
- film waveguide
- light converging
- light
- waveguide
- 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
- 239000010409 thin film Substances 0.000 title claims abstract description 28
- 230000005684 electric field Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 2
- 238000004544 sputter deposition Methods 0.000 abstract description 2
- 238000007740 vapor deposition Methods 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
Landscapes
- Optical Integrated Circuits (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、光集束性薄膜導波路の自動焦点可変の構造に
関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an automatic focusing structure of a light-focusing thin film waveguide.
本発明は、光集束性薄膜導波路の、表面に電極を設け、
光集束性薄膜導波路の焦点距離を電気光学効果を用いて
電気的に可変させることを実現したものである。The present invention provides an electrode on the surface of a light-focusing thin film waveguide,
This realizes electrically varying the focal length of a light-focusing thin film waveguide using the electro-optic effect.
従来の焦点距離の可変は、レンズ間の距離を変化させる
ことで実現されていた。Conventionally, variable focal length was achieved by changing the distance between lenses.
しかし、前述の従来技術では、機械的にレンズ間隔を変
え【いるために、小型軽量化は、レンズの大きさにより
決まり、また機械駆動のため故障しやすい等の問題を有
する。However, in the above-mentioned conventional technology, since the distance between the lenses is changed mechanically, the reduction in size and weight is determined by the size of the lenses, and since it is mechanically driven, there are problems such as easy failure.
そこで本発明は、このような問題点を解決するもので、
その目的とするところは、小型軽量で、電圧制御の光学
素子を提供するところにある。Therefore, the present invention aims to solve these problems.
The objective is to provide a voltage-controlled optical element that is small and lightweight.
本発明の自動焦点用光集束性薄膜導波路は、光集束性を
有する光伝送用薄膜導波路と、前記光伝送用ｉｖ膜導波
路の表面に電極を設げたことを特徴とする特
〔作用〕
本発明は以上の構造を有するもので、電極の働きにより
光集束性薄膜導波路の屈折率の分布に変化を与え、焦点
距離が変化することになる。The light-focusing thin film waveguide for autofocusing of the present invention has the following features: a thin film waveguide for light transmission having a light focusing property; and an electrode provided on the surface of the IV film waveguide for light transmission. ] The present invention has the above-described structure, and the function of the electrodes changes the refractive index distribution of the light-focusing thin film waveguide, thereby changing the focal length.
第１図は本発明の実施例の光集束性薄膜導波路の断面図
である。１は誘電体薄膜、２は光集束性導波路、３α、
ｓｂは電極、４は電源である。第２図は本発明の実施例
の立体図である。FIG. 1 is a cross-sectional view of a light-focusing thin film waveguide according to an embodiment of the present invention. 1 is a dielectric thin film, 2 is a light focusing waveguide, 3α,
sb is an electrode, and 4 is a power source. FIG. 2 is a three-dimensional view of an embodiment of the invention.
ここで光集束性薄膜導波路とは、薄膜導波路の断面にお
いて、屈折率が二乗分布に従って変化する導波路を指す
。Here, the optical focusing thin film waveguide refers to a waveguide whose refractive index changes according to a square distribution in a cross section of the thin film waveguide.
第１図、第２図に示すように光集束性薄膜導波路の表面
に電極を、蒸着法または、スパッタ法等、の方法により
設ける。As shown in FIGS. 1 and 2, electrodes are provided on the surface of the light-focusing thin film waveguide by a method such as vapor deposition or sputtering.
４の電源により３α、３ｂの電極に電圧を加えると、３
α、５ｂの間に電界が発生する０発生した電界により２
の光集束性導波路の屈折率分布に変化を与える。屈折率
分布の変化により光集束性薄膜導波路の焦点距離を変え
ることができる。２の光集束性薄膜導波路の屈折率は、
４の１！源の電圧によって制御することができる。よっ
て４の電源の電圧により、２の光集束性薄膜導波路の焦
点距離を変えることができる。When voltage is applied to the electrodes 3α and 3b by the power source 4, 3
An electric field is generated between α and 5b. 0 Due to the generated electric field, 2
changes the refractive index distribution of the optical focusing waveguide. The focal length of the light-focusing thin film waveguide can be changed by changing the refractive index distribution. The refractive index of the light-focusing thin film waveguide of No. 2 is:
1 of 4! It can be controlled by the voltage of the source. Therefore, the focal length of the light-focusing thin film waveguide 2 can be changed by the voltage of the power supply 4.
また第２図の光集束性薄膜導波路をレンズとして用いる
と、レンズ自体の焦点距離を電源電圧によって変化させ
ることができる。さらに、第２図の光集束性薄膜導波路
のレンズを組み合わせることにより、機械的に駆動する
部分のない、−圧制御による焦点距離可変素子を構成す
ることができる。電圧制御のため小型計量化が計れる。Furthermore, when the light-focusing thin film waveguide shown in FIG. 2 is used as a lens, the focal length of the lens itself can be changed by changing the power supply voltage. Furthermore, by combining the lenses of the light-focusing thin film waveguide shown in FIG. 2, it is possible to configure a variable focal length element that has no mechanically driven parts and is controlled by −pressure. Voltage control allows for smaller size and weight.
以上述べたように本発明によれば、光集束性薄膜−波路
の表面に電極を設けることにより、電圧制御の焦点距離
可変素子を構成することができるという効果を有する。As described above, according to the present invention, by providing an electrode on the surface of the light-focusing thin film-wave path, it is possible to configure a voltage-controlled variable focal length element.
第１図は本発明の光集束性薄膜導波路の実施例を示す主
要断面図。
第２図は本発明の光集束性薄膜導波路の実施例を示す主
要立体図。
１ ・・・・・・・・・誘電体
２ ・・・・・・・・・光集束性薄膜導波路３α
、５ｂ・・・・・・・・・電 極
４ ・・・・・・・・・１１ｍ
以上
出願人 セイコーエプソン株式会社FIG. 1 is a main cross-sectional view showing an embodiment of the light-focusing thin film waveguide of the present invention. FIG. 2 is a main three-dimensional diagram showing an embodiment of the light-focusing thin film waveguide of the present invention. 1 ...... Dielectric 2 ...... Light-focusing thin film waveguide 3α
, 5b... Electrode 4...... 11m or more Applicant Seiko Epson Corporation
Claims (1)
薄膜導波路の表面に電極を設けたことを特徴とする自動
焦点用光集束性薄膜導波路。1. A light-focusing thin-film waveguide for automatic focusing, comprising: a light-transmission thin-film waveguide having light-focusing properties; and an electrode provided on the surface of the light-transmission thin-film waveguide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25300587A JPH0194327A (en) | 1987-10-07 | 1987-10-07 | Light converging thin film waveguide for automatic focusing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25300587A JPH0194327A (en) | 1987-10-07 | 1987-10-07 | Light converging thin film waveguide for automatic focusing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0194327A true JPH0194327A (en) | 1989-04-13 |
Family
ID=17245164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25300587A Pending JPH0194327A (en) | 1987-10-07 | 1987-10-07 | Light converging thin film waveguide for automatic focusing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0194327A (en) |
-
1987
- 1987-10-07 JP JP25300587A patent/JPH0194327A/en active Pending
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