JPH01251842A - Optical telephone set - Google Patents
Optical telephone setInfo
- Publication number
- JPH01251842A JPH01251842A JP63079472A JP7947288A JPH01251842A JP H01251842 A JPH01251842 A JP H01251842A JP 63079472 A JP63079472 A JP 63079472A JP 7947288 A JP7947288 A JP 7947288A JP H01251842 A JPH01251842 A JP H01251842A
- Authority
- JP
- Japan
- Prior art keywords
- light
- diaphragm
- optical
- transmitting
- receiving
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 20
- 239000013307 optical fiber Substances 0.000 claims abstract description 11
- 230000005611 electricity Effects 0.000 claims abstract 3
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000008054 signal transmission Effects 0.000 claims description 2
- 230000005236 sound signal Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は光電話機に関し、特に入出力伝送路に光ファイ
バーを用いる光電話機に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical telephone, and more particularly to an optical telephone that uses optical fibers for input and output transmission paths.
従来、この種の光電話機は、送話器側で音声が電気信号
に一旦変調され、この変調された信号が光信号に変換さ
れて光ファイバに伝送される構成になっている。Conventionally, this type of optical telephone has a configuration in which voice is once modulated into an electrical signal on the transmitter side, and this modulated signal is converted into an optical signal and transmitted to an optical fiber.
上述した従来の光電話機は、送話器側で音声が電気信号
に一担変調され、この変調された信号が光信号に変換さ
れる構成になっているので、送話器側に光信号に変換す
る回路が必要となり、構成が複雑になるという欠点があ
る。The conventional optical telephone described above is configured so that the voice is modulated into an electrical signal on the transmitter side, and this modulated signal is converted into an optical signal. This has the disadvantage that a conversion circuit is required and the configuration becomes complicated.
本発明の電話機は、信号の伝送路に光ファイバーを用い
る光電話機において、送話系に音声によって振動し光を
反射する振動板を有する送話部と、前記振動板に光を第
１のレンズを介して照射する光源部と、前記振動板から
の前記光の反射光を第２のレンズを介して集光し送話用
光ファイバーへ伝送する伝送部とを備え、受話系に受話
用光ケープルからの光を受光して電気信号に変換する受
光部と、前記電気信号を復調して音声信号に変換する受
話部とを備えている。The telephone of the present invention is an optical telephone that uses an optical fiber for a signal transmission path, and includes a transmitting section having a diaphragm that vibrates with sound and reflects light in a transmitting system, and a first lens that transmits light to the diaphragm. a light source section that emits light from the diaphragm through the diaphragm, and a transmission section that collects the reflected light from the diaphragm through a second lens and transmits it to the transmitting optical fiber; The receiver includes a light receiving section that receives light and converts it into an electrical signal, and a receiving section that demodulates the electrical signal and converts it into an audio signal.
次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図（ａ）、（ｂ）はそれぞれ本発明の一実施例を示
す送話系と受話系のブロック図である。FIGS. 1(a) and 1(b) are block diagrams of a transmitting system and a receiving system, respectively, showing an embodiment of the present invention.
第１図（ａ）、（ｂ）において、本実施例の光電話機の
送話系は音声によって振動し光を反射する振動板１１を
有する送話部１０と、振動板１１に光をレンズ２１を介
して照射する光源部２０と、振動板１１からの反射光を
レンズ３１を介して集光し送話用光ファイバー７０へ伝
送する伝送部３０とを備え、受話系は受話用光ケーブル
８０からの光を受光して電気信号に変換する光／電気変
換器６０と、電気信号を復調する復調回路５０と、復調
された信号で振動板４１を振動させて音声に変換する受
話部４０とを備えて構成している。In FIGS. 1(a) and 1(b), the transmitting system of the optical telephone of this embodiment includes a transmitting unit 10 having a diaphragm 11 that vibrates with sound and reflects light, and a lens 21 that transmits light to the diaphragm 11. and a transmission section 30 that collects the reflected light from the diaphragm 11 through a lens 31 and transmits it to the transmitting optical fiber 70. It includes an optical/electrical converter 60 that receives light and converts it into an electrical signal, a demodulation circuit 50 that demodulates the electrical signal, and a receiving unit 40 that vibrates a diaphragm 41 with the demodulated signal and converts it into sound. It is composed of
次に、本実施例の動作について説明する。Next, the operation of this embodiment will be explained.
第１図（ａ）において、振動板１１の反射光は無音時に
最大値が伝送部３０で集光されるようにレンズ２１．レ
ンズ３１が調整されているものとする。In FIG. 1(a), the reflected light from the diaphragm 11 is focused by the lens 21 so that the maximum value is collected by the transmission section 30 during silent periods. It is assumed that the lens 31 has been adjusted.
送話部１０に音声が入力すると音声圧力によって振動板
１１が振動し、光源部２０からの光は振動板１１の振動
変位によって変調され、変調された反射光がレンズ３１
で集光されて送話用光ケーブル７０へ伝送される。When a voice is input to the transmitter 10, the diaphragm 11 vibrates due to the sound pressure, the light from the light source 20 is modulated by the vibration displacement of the diaphragm 11, and the modulated reflected light is reflected by the lens 31.
The light is collected and transmitted to the transmitting optical cable 70.
変調された反射光は振動板１１の変位の大きさと変位の
周波数を持った信号となっている。The modulated reflected light becomes a signal having the magnitude of the displacement of the diaphragm 11 and the frequency of the displacement.
第１図（ｂ）において、送話側からの変調された反射光
は受話用光ケーブル８０に伝送され、光／電気変換器６
０で受光されて電気信号に変換される。この電気信号は
復調回路５０で復調され、復調された電気信号によって
振動板４１が振動し音声が復元される。In FIG. 1(b), the modulated reflected light from the transmitting side is transmitted to the receiving optical cable 80, and the optical/electrical converter 6
The light is received at 0 and converted into an electrical signal. This electrical signal is demodulated by the demodulation circuit 50, and the demodulated electrical signal causes the diaphragm 41 to vibrate, thereby restoring the sound.
以上説明した様に本発明は、音声によって振動する振動
板からの反射光を光ファイバーで受光して伝送する事に
より、音声の送話系に従来用いられていた電気−光変換
器を必要としないので、従来に比べて回路構成を簡単に
することができる効果がある。As explained above, the present invention eliminates the need for the electric-to-optical converter conventionally used in voice transmission systems by receiving and transmitting the reflected light from the diaphragm vibrated by sound using an optical fiber. Therefore, there is an effect that the circuit configuration can be simplified compared to the conventional one.
第１図（ａ）、（ｂ）はそれぞれ本発明の一実施例を示
す送話系と受話系のブロック図である。
１０・・・送話部、１１・・・振動板、２０・・・光源
部、２１・・・レンズ、３０・・・伝送部、３１・・・
レンズ、４０・・・受話部、４１・・・振動板、５０・
・・復調回路、６０・・・光／電気変換器、７０・・・
送話用光ファイバー、８０・・・受話用光ファイバー。FIGS. 1(a) and 1(b) are block diagrams of a transmitting system and a receiving system, respectively, showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 10... Transmission part, 11... Vibration plate, 20... Light source part, 21... Lens, 30... Transmission part, 31...
Lens, 40... Receiving unit, 41... Vibration plate, 50.
... Demodulation circuit, 60... Optical/electrical converter, 70...
Optical fiber for sending calls, 80... Optical fiber for receiving calls.
Claims (1)
、送話系に音声によって振動し光を反射する振動板を有
する送話部と、前記振動板に光を第１のレンズを介して
照射する光源部と、前記振動板からの前記光の反射光を
第２のレンズを介して集光し送話用光ファイバーへ伝送
する伝送部とを備え、受話系に受話用光ケーブルからの
光を受光して電気信号に変換する受光部と、前記電気信
号を復調して音声信号に変換する受話部とを備えて成る
ことを特徴とする光電話機。In an optical telephone that uses an optical fiber as a signal transmission path, the transmitting unit includes a transmitting unit having a diaphragm that vibrates with sound and reflects light in the transmitting system, and a light source unit that irradiates light to the diaphragm through a first lens. and a transmission unit that collects the reflected light from the diaphragm through a second lens and transmits it to the transmitting optical fiber, and the receiving system receives the light from the receiving optical cable and generates electricity. 1. An optical telephone comprising: a light receiving section that converts the electrical signal into a signal; and a receiving section that demodulates the electrical signal and converts it into an audio signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63079472A JPH01251842A (en) | 1988-03-30 | 1988-03-30 | Optical telephone set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63079472A JPH01251842A (en) | 1988-03-30 | 1988-03-30 | Optical telephone set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01251842A true JPH01251842A (en) | 1989-10-06 |
Family
ID=13690830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63079472A Pending JPH01251842A (en) | 1988-03-30 | 1988-03-30 | Optical telephone set |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01251842A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993007686A1 (en) * | 1991-10-09 | 1993-04-15 | Buchholz Jeffrey C | Optical microphone with vibrating optical element |
| EP0599375A1 (en) * | 1992-11-20 | 1994-06-01 | Ascom Tech Ag | Light modulator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5824118A (en) * | 1981-07-10 | 1983-02-14 | シ−メンス・アクチエンゲゼルシヤフト | Electro-optic modulator |
| JPS6114549B2 (en) * | 1982-06-17 | 1986-04-19 | Fujitsu Ltd |
-
1988
- 1988-03-30 JP JP63079472A patent/JPH01251842A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5824118A (en) * | 1981-07-10 | 1983-02-14 | シ−メンス・アクチエンゲゼルシヤフト | Electro-optic modulator |
| JPS6114549B2 (en) * | 1982-06-17 | 1986-04-19 | Fujitsu Ltd |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993007686A1 (en) * | 1991-10-09 | 1993-04-15 | Buchholz Jeffrey C | Optical microphone with vibrating optical element |
| US5262884A (en) * | 1991-10-09 | 1993-11-16 | Micro-Optics Technologies, Inc. | Optical microphone with vibrating optical element |
| EP0599375A1 (en) * | 1992-11-20 | 1994-06-01 | Ascom Tech Ag | Light modulator |
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