JP2008118542A - Infrared optical signal transmitter, infrared optical signal receiver and infrared optical signal communication equipment - Google Patents

Infrared optical signal transmitter, infrared optical signal receiver and infrared optical signal communication equipment Download PDF

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JP2008118542A
JP2008118542A JP2006301798A JP2006301798A JP2008118542A JP 2008118542 A JP2008118542 A JP 2008118542A JP 2006301798 A JP2006301798 A JP 2006301798A JP 2006301798 A JP2006301798 A JP 2006301798A JP 2008118542 A JP2008118542 A JP 2008118542A
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optical signal
infrared
polarization direction
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polarizing plate
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Masahiro Kawamura
政宏 河村
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Sharp Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an infrared optical signal transmitter, an infrared optical signal receiver capable of preventing generation of noise by interference of optical signals between a first optical signal and a second optical signal and infrared optical signal communication equipment combining them. <P>SOLUTION: The infrared optical signal transmitter 2 is provided with a first optical signal transmitting part 21 (polarizing plate 21c for first transmission that a first infrared emitting diode 21b polarizes emitted infrared light to the first polarizing direction DP1) which transmits the first optical signal LS1 polarized to the first polarizing direction DP1 and a second optical signal transmitting part 22 (a polarizing plate 22c for second transmission that a second infrared emitting diode 22b polarizes emitted infrared light to the second polarizing direction DP2) which transmits the second optical signal LS2 polarized to the second polarizing direction DP2 crossing the first polarizing direction DP1. The infrared optical signal receiver 3 is provided with a first optical signal receiving part 31 which receives the first optical signal LS1 and a second optical signal receiving part 32 which receives the second optical signal LS2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、赤外線で構成された光信号を送信する赤外線光信号送信装置、赤外線で構成された光信号を受信する赤外線光信号受信装置、および赤外線光信号送信装置と赤外線光信号受信装置を備える赤外線光信号通信装置に関する。   The present invention includes an infrared optical signal transmitter for transmitting an optical signal composed of infrared rays, an infrared optical signal receiver for receiving an optical signal composed of infrared rays, and an infrared optical signal transmitter and an infrared optical signal receiver. The present invention relates to an infrared optical signal communication device.

赤外線光信号を送信する赤外線光信号送信装置、赤外線光信号を受信する赤外線光信号受信装置、赤外線光信号送信装置と赤外線光信号受信装置の組合せとして構成される赤外線光信号通信装置が知られている。   Infrared optical signal transmitter for transmitting infrared optical signal, infrared optical signal receiver for receiving infrared optical signal, infrared optical signal communication device configured as a combination of infrared optical signal transmitter and infrared optical signal receiver are known Yes.

図７に基づいて従来の赤外線光信号送信装置、赤外線光信号受信装置、赤外線光信号通信装置を説明する。   A conventional infrared light signal transmitting device, infrared light signal receiving device, and infrared light signal communication device will be described with reference to FIG.

図７は、従来の赤外線光信号送信装置、赤外線光信号受信装置、および赤外線光信号通信装置の概略を構成ブロックで示すブロック図である。   FIG. 7 is a block diagram showing an outline of a conventional infrared optical signal transmitting device, infrared optical signal receiving device, and infrared optical signal communication device in a configuration block.

従来の赤外線光信号通信装置１０１は、送信側として機能する赤外線光信号送信装置１０２と受信側として機能する赤外線光信号受信装置１０３で構成してある。   A conventional infrared optical signal communication device 101 is composed of an infrared optical signal transmission device 102 that functions as a transmission side and an infrared optical signal reception device 103 that functions as a reception side.

赤外線光信号送信装置１０２は、入力信号Ｓｉｎに基づいて発光ダイオード１２１から光信号ＬＳを発光することにより光信号を受信側へ送信する。また、赤外線光信号送信装置１０２は、発光ダイオード１２１を駆動するＬＥＤ駆動回路１２２、ＬＥＤ駆動回路１２２へ信号を入力する周波数変調回路１２３、周波数変調回路１２３を機能させるための搬送波を発生する搬送波発振回路１２４を備える。   The infrared optical signal transmitter 102 transmits the optical signal to the receiving side by emitting the optical signal LS from the light emitting diode 121 based on the input signal Sin. The infrared optical signal transmission device 102 also includes an LED drive circuit 122 that drives the light emitting diode 121, a frequency modulation circuit 123 that inputs a signal to the LED drive circuit 122, and a carrier wave oscillation that generates a carrier wave for causing the frequency modulation circuit 123 to function. A circuit 124 is provided.

音声信号などを伝送対象とする入力信号Ｓｉｎを周波数変調回路１２３で周波数変調し、周波数変調した入力信号ＳｉｎをＬＥＤ駆動回路１２２へ入力して、ＬＥＤ駆動回路１２２により入力信号Ｓｉｎに応じて発光ダイオード１２１を駆動することにより入力信号Ｓｉｎに応じた光信号ＬＳを送信する構成としてある。   An input signal Sin for transmitting an audio signal or the like is frequency-modulated by the frequency modulation circuit 123, and the frequency-modulated input signal Sin is input to the LED driving circuit 122, and the LED driving circuit 122 responds to the input signal Sin with a light emitting diode. By driving 121, an optical signal LS corresponding to the input signal Sin is transmitted.

なお、発光ダイオード１２１による光信号ＬＳは、位相、方向がばらばらであり、いわゆるランダム偏光の状態となっていることから、ランダム方向ＤＰｒを有する状態で空間を伝わっていく。したがって、波長、偏光方向を用いた光信号の識別分離は不可能である。   Note that the optical signal LS from the light emitting diode 121 has a different phase and direction and is in a so-called random polarization state, and therefore travels through the space with a random direction DPr. Therefore, it is impossible to identify and separate optical signals using the wavelength and polarization direction.

例えば、入力信号Ｓｉｎがステレオ信号などのように右信号に対する右チャンネル、左信号に対する左チャンネルの２チャンネル構成である場合、右チャンネル、左チャンネル（右信号、左信号）の識別分離は、例えば周波数多重方式により行なっている。具体的には、搬送波周波数を、左チャンネルを２．３ＭＨｚ、右チャンネルを２．８ＭＨｚとして送信する。このような周波数多重方式の技術を開示したものとして、例えば特許文献１がある。   For example, when the input signal Sin has a two-channel configuration of a right channel for the right signal and a left channel for the left signal such as a stereo signal, the identification separation of the right channel and the left channel (right signal and left signal) is performed by, for example, frequency This is done by the multiplexing method. Specifically, the carrier frequency is transmitted with the left channel set to 2.3 MHz and the right channel set to 2.8 MHz. For example, Patent Literature 1 discloses such a frequency multiplexing technique.

赤外線光信号受信装置１０３は、光信号ＬＳをフォトダイオード１３１で受光し、光電変換して光電変換により光信号ＬＳに対応する電気信号を増幅回路１３２へ出力する。増幅回路１３２で増幅した電気信号を周波数復調回路１３３で周波数復調することにより入力信号Ｓｉｎに対応する出力信号Ｓｏｕｔを得る。   The infrared optical signal receiving device 103 receives the optical signal LS with the photodiode 131, performs photoelectric conversion, and outputs an electrical signal corresponding to the optical signal LS to the amplification circuit 132 by photoelectric conversion. The frequency demodulating circuit 133 demodulates the electric signal amplified by the amplifying circuit 132 to obtain an output signal Sout corresponding to the input signal Sin.

したがって、従来例（赤外線光信号送信装置１０２および赤外線光信号受信装置１０３を用いた赤外線光信号通信装置１０１）によっても赤外光を適用した光信号の通信を行なうことは可能である。
特開平８−１３０５０６号公報 Therefore, it is possible to perform communication of an optical signal to which infrared light is applied even by the conventional example (infrared optical signal communication apparatus 101 using infrared optical signal transmission apparatus 102 and infrared optical signal reception apparatus 103).
JP-A-8-130506

しかし、従来の赤外線光信号通信装置で適用する周波数多重方式では、周波数変調回路、搬送波発振回路、周波数復調回路などの高周波回路が必要となることから、回路構成が高度かつ複雑であった。また、複数のチャンネル信号（例えば、左チヤンネル信号と右チャンネル信号）を送信する場合は、信号を分離して送信することが困難であることから、信号が相互に干渉し、ノイズを発生するという問題があった。   However, in the frequency multiplexing method applied to the conventional infrared optical signal communication device, a high frequency circuit such as a frequency modulation circuit, a carrier wave oscillation circuit, a frequency demodulation circuit, etc. is required, so that the circuit configuration is sophisticated and complicated. Also, when transmitting a plurality of channel signals (for example, a left channel signal and a right channel signal), it is difficult to separate and transmit the signals, so that the signals interfere with each other and generate noise. There was a problem.

本発明はこのような状況に鑑みてなされたものであり、第１偏光方向に偏光した第１光信号を送信する第１光信号送信部と、第１偏光方向と交差する第２偏光方向に偏光した第２光信号を送信する第２光信号送信部とを備えることにより、第１光信号と第２光信号との間での光信号の干渉によるノイズの発生を防止することが可能で、光信号の正確な送信を簡単な構成で容易に行なうことが可能な赤外線光信号送信装置を提供することを目的とする。   The present invention has been made in view of such a situation, and a first optical signal transmitter that transmits a first optical signal polarized in a first polarization direction, and a second polarization direction that intersects the first polarization direction. By providing the second optical signal transmission unit that transmits the polarized second optical signal, it is possible to prevent the occurrence of noise due to the interference of the optical signal between the first optical signal and the second optical signal. An object of the present invention is to provide an infrared optical signal transmitter capable of easily performing accurate transmission of an optical signal with a simple configuration.

また、本発明は、第１偏光方向に偏光された第１光信号を受信する第１光信号受信部と、第１偏光方向と交差する第２偏光方向に偏光された第２光信号を受信する第２光信号受信部とを備えることにより、第１光信号と第２光信号との間での光信号の干渉によるノイズの発生を防止することが可能で、光信号の正確な受信を簡単な構成で容易に行なうことが可能な赤外線光信号受信装置を提供することを他の目的とする。   The present invention also receives a first optical signal receiver that receives a first optical signal polarized in a first polarization direction, and a second optical signal that is polarized in a second polarization direction that intersects the first polarization direction. The second optical signal receiving unit that prevents the generation of noise due to the interference of the optical signal between the first optical signal and the second optical signal, and enables accurate reception of the optical signal. Another object of the present invention is to provide an infrared optical signal receiving apparatus that can be easily performed with a simple configuration.

また、本発明は、本発明に係る赤外線光信号送信装置および赤外線光信号受信装置を備えることにより、簡単な構成で第１光信号と第２光信号との間での光信号の干渉によるノイズの発生を防止することが可能で、光信号の正確な送信および受信が可能となり、正確で信頼性の高い赤外線光信号による通信を実現することができる赤外線光信号通信装置を提供することを他の目的とする。   In addition, the present invention includes the infrared optical signal transmitter and the infrared optical signal receiver according to the present invention, so that noise due to interference of the optical signal between the first optical signal and the second optical signal can be achieved with a simple configuration. The present invention provides an infrared optical signal communication device that can prevent the occurrence of optical signals, enables accurate transmission and reception of optical signals, and realizes accurate and reliable communication using infrared optical signals. The purpose.

本発明に係る赤外線光信号送信装置は、赤外線で構成された第１光信号および赤外線で構成された第２光信号を送信する赤外線光信号送信装置であって、第１偏光方向に偏光した前記第１光信号を送信する第１光信号送信部と、前記第１偏光方向と交差する第２偏光方向に偏光した前記第２光信号を送信する第２光信号送信部とを備えることを特徴とする。   An infrared optical signal transmission device according to the present invention is an infrared optical signal transmission device that transmits a first optical signal composed of infrared rays and a second optical signal composed of infrared rays, and is polarized in a first polarization direction. A first optical signal transmission unit that transmits a first optical signal, and a second optical signal transmission unit that transmits the second optical signal polarized in a second polarization direction that intersects the first polarization direction. And

この構成により、相互に交差する方向に偏光された第１光信号と第２光信号を分離して送信することができるので、第１光信号と第２光信号との間での光信号の干渉によるノイズの発生を防止することが可能となり、光信号の正確な送信を簡単な構成で容易に行なうことができる。   With this configuration, since the first optical signal and the second optical signal polarized in directions intersecting each other can be separated and transmitted, the optical signal between the first optical signal and the second optical signal can be transmitted. Generation of noise due to interference can be prevented, and accurate transmission of an optical signal can be easily performed with a simple configuration.

また、本発明に係る赤外線光信号送信装置では、前記第１光信号送信部は、赤外線を発光する第１赤外発光ダイオードと、該第１赤外発光ダイオードが発光した赤外線を前記第１偏光方向に偏光して前記第１光信号を発生する第１送信用偏光板とを備え、前記第２光信号送信部は、赤外線を発光する第２赤外発光ダイオードと、該第２赤外発光ダイオードが発光した赤外線を前記第２偏光方向に偏光して前記第２光信号を発生する第２送信用偏光板とを備えることを特徴とする。   In the infrared optical signal transmitter according to the present invention, the first optical signal transmitter includes a first infrared light-emitting diode that emits infrared light, and infrared light emitted from the first infrared light-emitting diode is converted into the first polarized light. A first transmission polarizing plate that is polarized in the direction to generate the first optical signal, and the second optical signal transmission unit includes a second infrared light emitting diode that emits infrared light, and the second infrared light emission. And a second transmitting polarizing plate for generating the second optical signal by polarizing infrared light emitted from the diode in the second polarization direction.

この構成により、簡単な構成で、相互に交差する方向に偏光された第１光信号と第２光信号を確実に分離して送信することが可能となる。   With this configuration, the first optical signal and the second optical signal polarized in directions intersecting each other can be reliably separated and transmitted with a simple configuration.

また、本発明に係る赤外線光信号送信装置では、前記第１光信号送信部は、前記第１偏光方向に偏光した前記第１光信号を発光する第１レーザダイオードを備え、前記第２光信号送信部は、前記第２偏光方向に偏光した前記第２光信号を発光する第２レーザダイオードを備えることを特徴とする。   In the infrared optical signal transmission device according to the present invention, the first optical signal transmission unit includes a first laser diode that emits the first optical signal polarized in the first polarization direction, and the second optical signal. The transmitting unit includes a second laser diode that emits the second optical signal polarized in the second polarization direction.

この構成により、送信用偏光板を省略して部品点数を低減した簡単な構成で、相互に交差する方向に偏光された第１光信号と第２光信号を送信することが可能となる。   With this configuration, it is possible to transmit the first optical signal and the second optical signal polarized in directions intersecting each other with a simple configuration in which the transmission polarizing plate is omitted and the number of components is reduced.

また、本発明に係る赤外線光信号送信装置では、前記第１レーザダイオードおよび前記第２レーザダイオードは、アイセーフ型であることを特徴とする。   In the infrared optical signal transmission device according to the present invention, the first laser diode and the second laser diode are eye-safe types.

この構成により、安全性を向上させることができるので、民生用に利用できる赤外線光信号送信装置とすることが可能となる。   With this configuration, safety can be improved, so that an infrared optical signal transmission device that can be used for consumer use can be obtained.

また、本発明に係る赤外線光信号送信装置では、前記第１偏光方向は垂直方向であり、前記第２偏光方向は水平方向であることを特徴とする。   In the infrared optical signal transmitter according to the present invention, the first polarization direction is a vertical direction, and the second polarization direction is a horizontal direction.

この構成により、正確かつ容易に光信号の偏光方向を画定することが可能となり、信頼性、利便性の高い赤外線光信号送信装置とすることができる。   With this configuration, the polarization direction of the optical signal can be defined accurately and easily, and an infrared optical signal transmission device with high reliability and convenience can be obtained.

また、本発明に係る赤外線光信号受信装置は、赤外線で構成され第１偏光方向に偏光された第１光信号および赤外線で構成され前記第１偏光方向と交差する第２偏光方向に偏光された第２光信号を受信する赤外線光信号受信装置であって、前記第１光信号を受信する第１光信号受信部と、前記第２光信号を受信する第２光信号受信部とを備えることを特徴とする。   The infrared optical signal receiver according to the present invention includes a first optical signal composed of infrared rays and polarized in a first polarization direction and a second polarization direction composed of infrared rays and intersecting the first polarization direction. An infrared optical signal receiving device that receives a second optical signal, comprising: a first optical signal receiving unit that receives the first optical signal; and a second optical signal receiving unit that receives the second optical signal. It is characterized by.

この構成により、簡単な構成で相互に交差する方向に偏光された第１光信号と第２光信号を分離して受信することができるので、第１光信号と第２光信号との間での光信号の干渉によるノイズの発生を防止することが可能となり、光信号の正確な受信を簡単な構成で容易に行なうことができる。   With this configuration, it is possible to separate and receive the first optical signal and the second optical signal polarized in directions crossing each other with a simple configuration, so that the first optical signal and the second optical signal can be received. The generation of noise due to the interference of the optical signal can be prevented, and the accurate reception of the optical signal can be easily performed with a simple configuration.

また、本発明に係る赤外線光信号受信装置では、前記第１光信号受信部は、前記第１光信号を通過させる第１受信用偏光板と、該第１受信用偏光板が通過させた前記第１光信号を受光する第１受光素子とを備え、前記第２光信号受信部は、前記第２光信号を通過させる第２受信用偏光板と、該第２受信用偏光板が通過させた前記第２光信号を受光する第２受光素子とを備えることを特徴とする。   In the infrared optical signal receiving device according to the present invention, the first optical signal receiving unit includes a first receiving polarizing plate that allows the first optical signal to pass therethrough and the first receiving polarizing plate that allows the first optical signal to pass. A first light receiving element that receives the first optical signal, wherein the second optical signal receiving unit is configured to allow the second receiving polarizing plate to pass the second optical signal and the second receiving polarizing plate to pass therethrough. And a second light receiving element for receiving the second optical signal.

この構成により、簡単な構成で、相互に交差する方向に偏光された第１光信号と第２光信号を確実に分離して受信することが可能となる。   With this configuration, the first optical signal and the second optical signal polarized in directions intersecting each other can be reliably separated and received with a simple configuration.

また、本発明に係る赤外線光信号受信装置では、前記第１光信号受信部は、前記第１光信号を通過させる方向に回動し、前記第２光信号受信部は、前記第２光信号を通過させる方向に回動する構成としてあることを特徴とする。   In the infrared optical signal receiving device according to the present invention, the first optical signal receiver rotates in a direction to pass the first optical signal, and the second optical signal receiver is the second optical signal. It is characterized by being configured to rotate in the direction of passing the.

この構成により、赤外線光信号受信装置の位置が偏光方向に対して変動した場合でも、偏光板の方向を変更させることができるので、偏光板の位置を偏光方向に追随させて第１光信号および第２光信号を確実に受信することが可能となる。   With this configuration, the direction of the polarizing plate can be changed even when the position of the infrared optical signal receiving device fluctuates with respect to the polarization direction. Therefore, the first optical signal and the position of the polarizing plate are made to follow the polarization direction. It becomes possible to reliably receive the second optical signal.

また、本発明に係る赤外線光信号受信装置では、前記第１偏光方向は垂直方向であり、前記第２偏光方向は水平方向であることを特徴とする。   In the infrared optical signal receiving device according to the present invention, the first polarization direction is a vertical direction, and the second polarization direction is a horizontal direction.

この構成により、正確かつ容易に光信号の偏光方向を画定することが可能となり、構成が簡単で信頼性、利便性の高い赤外線光信号受信装置とすることができる。   With this configuration, the polarization direction of the optical signal can be defined accurately and easily, and the infrared optical signal receiving device having a simple configuration and high reliability and convenience can be obtained.

また、本発明に係る赤外線光信号受信装置では、前記光信号受信装置は、携帯移動式音声発生装置であることを特徴とする。   In the infrared optical signal receiver according to the present invention, the optical signal receiver is a portable mobile sound generator.

この構成により、例えば、ワイヤレスヘッドホン、ワイヤレスイヤホンとして適用することが可能となり、簡単な構成でノイズが少なく音質の良い移動式音声発生装置とすることができる。   With this configuration, it can be applied as, for example, a wireless headphone or a wireless earphone, and a mobile sound generator having a simple configuration with less noise and good sound quality can be obtained.

また、本発明に係る赤外線光信号通信装置は、赤外線光信号送信装置と赤外線光信号受信装置とを備える赤外線光信号通信装置であって、前記赤外線光信号送信装置は、本発明に係る赤外線光信号送信装置であり、前記赤外線光信号受信装置は、本発明に係る赤外線光信号受信装置であることを特徴とする。   An infrared optical signal communication device according to the present invention is an infrared optical signal communication device including an infrared optical signal transmission device and an infrared optical signal reception device, and the infrared optical signal transmission device is an infrared light according to the present invention. A signal transmission device, wherein the infrared light signal reception device is an infrared light signal reception device according to the present invention.

この構成により、簡単な構成で第１光信号と第２光信号との間での光信号の干渉によるノイズの発生を防止することが可能となり、光信号の正確な送信および受信が可能となるので、正確で信頼性の高い赤外線光信号による通信を実現することができる。   With this configuration, it is possible to prevent the occurrence of noise due to the interference of the optical signal between the first optical signal and the second optical signal with a simple configuration, and it is possible to accurately transmit and receive the optical signal. Therefore, it is possible to realize communication using an infrared light signal that is accurate and reliable.

本発明に係る赤外線光信号送信装置によれば、第１偏光方向に偏光した第１光信号を送信する第１光信号送信部と、第１偏光方向と交差する第２偏光方向に偏光した第２光信号を送信する第２光信号送信部とを備えることから、第１光信号と第２光信号との間での光信号の干渉によるノイズの発生を防止することが可能で、光信号の正確な送信を簡単な構成で容易に行なうことができるという効果を奏する。   According to the infrared optical signal transmission device of the present invention, the first optical signal transmission unit that transmits the first optical signal polarized in the first polarization direction, and the second polarization direction that is polarized in the second polarization direction that intersects the first polarization direction. Since the second optical signal transmission unit that transmits the two optical signals is provided, it is possible to prevent the occurrence of noise due to the interference of the optical signal between the first optical signal and the second optical signal. Thus, there is an effect that accurate transmission can be easily performed with a simple configuration.

また、本発明に係る赤外線光信号受信装置によれば、第１偏光方向に偏光された第１光信号を受信する第１光信号受信部と、第１偏光方向と交差する第２偏光方向に偏光された第２光信号を受信する第２光信号受信部とを備えることから、第１光信号と第２光信号との間での光信号の干渉によるノイズの発生を防止することが可能で、光信号の正確な受信を簡単な構成で容易に行なうことができるという効果を奏する。   According to the infrared optical signal receiving device of the present invention, the first optical signal receiving unit that receives the first optical signal polarized in the first polarization direction, and the second polarization direction that intersects the first polarization direction. Since the second optical signal receiving unit that receives the polarized second optical signal is provided, it is possible to prevent the occurrence of noise due to the interference of the optical signal between the first optical signal and the second optical signal. Thus, there is an effect that accurate reception of an optical signal can be easily performed with a simple configuration.

また、本発明に係る赤外線光信号通信装置によれば、本発明に係る赤外線光信号送信装置および赤外線光信号受信装置を備えることから、簡単な構成で第１光信号と第２光信号との間での光信号の干渉によるノイズの発生を防止することが可能で、光信号の正確な送信および受信が可能となり、正確で信頼性の高い赤外線光信号による通信を実現することができるという効果を奏する。   Further, according to the infrared optical signal communication device according to the present invention, since the infrared optical signal transmission device and the infrared optical signal reception device according to the present invention are provided, the first optical signal and the second optical signal can be easily configured. Of noise caused by interference of optical signals between them, enabling the accurate transmission and reception of optical signals, and the realization of accurate and reliable infrared optical signal communication Play.

以下、本発明の実施の形態を図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

＜実施の形態１＞
図１は、本発明の実施の形態１に係る赤外線光信号送信装置、赤外線光信号受信装置、および赤外線光信号通信装置の概略を構成ブロックで示すブロック図である。 <Embodiment 1>
FIG. 1 is a block diagram schematically showing the infrared optical signal transmission device, the infrared optical signal reception device, and the infrared optical signal communication device according to Embodiment 1 of the present invention in configuration blocks.

本実施の形態に係る赤外線光信号通信装置１は、送信側として機能する赤外線光信号送信装置２と受信側として機能する赤外線光信号受信装置３で構成してある。   The infrared optical signal communication device 1 according to the present embodiment includes an infrared optical signal transmission device 2 that functions as a transmission side and an infrared optical signal reception device 3 that functions as a reception side.

本実施の形態に係る赤外線光信号送信装置２は、赤外線で構成された第１光信号ＬＳ１および赤外線で構成された第２光信号ＬＳ２を送信する構成としてある。また、赤外線光信号送信装置２は、第１偏光方向ＤＰ１に偏光した第１光信号ＬＳ１を送信する第１光信号送信部２１と、第１偏光方向ＤＰ１と交差する第２偏光方向ＤＰ２に偏光した第２光信号ＬＳ２を送信する第２光信号送信部２２とを備える。   The infrared optical signal transmitter 2 according to the present embodiment is configured to transmit a first optical signal LS1 composed of infrared rays and a second optical signal LS2 composed of infrared rays. Further, the infrared optical signal transmission device 2 is polarized in the first optical signal transmission unit 21 that transmits the first optical signal LS1 polarized in the first polarization direction DP1, and in the second polarization direction DP2 that intersects the first polarization direction DP1. And a second optical signal transmitter 22 for transmitting the second optical signal LS2.

第１偏光方向ＤＰ１と第２偏光方向ＤＰ２との交差は、例えば、第１偏光方向ＤＰ１を垂直方向とし、第２偏光方向ＤＰ２を水平方向として相互に直交させることが好ましい。垂直方向と水平方向として相互に直交させることにより、相互の識別が容易となる第１光信号ＬＳ１および第２光信号ＬＳ２を簡単な構造で容易に発生させることが可能となる。また、第１偏光方向ＤＰ１を垂直方向とし、第２偏光方向ＤＰ２を水平方向とすることにより、正確かつ容易に光信号の偏光方向を画定することが可能となり、信頼性、利便性の高い赤外線光信号送信装置２とすることができる。   For example, the intersection of the first polarization direction DP1 and the second polarization direction DP2 is preferably orthogonal to each other with the first polarization direction DP1 as the vertical direction and the second polarization direction DP2 as the horizontal direction. By making the vertical direction and the horizontal direction orthogonal to each other, the first optical signal LS1 and the second optical signal LS2 that can be easily distinguished from each other can be easily generated with a simple structure. Also, by setting the first polarization direction DP1 as the vertical direction and the second polarization direction DP2 as the horizontal direction, it becomes possible to accurately and easily demarcate the polarization direction of the optical signal, and the highly reliable and convenient infrared ray. The optical signal transmission device 2 can be obtained.

赤外線光信号送信装置２の構成により、相互に交差する方向に偏光された第１光信号ＬＳ１と第２光信号ＬＳ２を分離して送信することができるので、第１光信号ＬＳ１と第２光信号ＬＳ２との間での光信号の干渉によるノイズの発生を防止することが可能となり、光信号の正確な送信を容易に行なうことができる。   The first optical signal LS1 and the second light can be transmitted by separating the first optical signal LS1 and the second optical signal LS2 polarized in mutually intersecting directions by the configuration of the infrared optical signal transmission device 2. Generation of noise due to interference of the optical signal with the signal LS2 can be prevented, and accurate transmission of the optical signal can be easily performed.

第１光信号送信部２１は、赤外線を発光する第１赤外発光ダイオード２１ｂと、第１赤外発光ダイオード２１ｂが発光した赤外線を第１偏光方向ＤＰ１に偏光して第１光信号ＬＳ１を発生する第１送信用偏光板２１ｃとを備える。つまり、第１赤外発光ダイオード２１ｂが発光した赤外線の内から第１偏光方向ＤＰ１のみの赤外線が第１送信用偏光板２１ｃを通過して第１光信号ＬＳ１を構成する。   The first optical signal transmitter 21 generates the first optical signal LS1 by polarizing the infrared light emitted from the first infrared light emitting diode 21b and the first infrared light emitting diode 21b in the first polarization direction DP1. First transmission polarizing plate 21c. That is, of the infrared rays emitted from the first infrared light emitting diode 21b, the infrared rays having only the first polarization direction DP1 pass through the first transmission polarizing plate 21c to constitute the first optical signal LS1.

また、第２光信号送信部２２は、赤外線を発光する第２赤外発光ダイオード２２ｂと、第２赤外発光ダイオード２２ｂが発光した赤外線を第２偏光方向ＤＰ２に偏光して第２光信号ＬＳ２を発生する第２送信用偏光板２２ｃとを備える。つまり、第２赤外発光ダイオード２２ｂが発光した赤外線の内から第２偏光方向ＤＰ２のみの赤外線が第２送信用偏光板２２ｃを通過して第２光信号ＬＳ１を構成する。   In addition, the second optical signal transmission unit 22 polarizes the second infrared light emitting diode 22b that emits infrared light, and the infrared light emitted from the second infrared light emitting diode 22b in the second polarization direction DP2, and the second optical signal LS2. And a second transmission polarizing plate 22c. That is, of the infrared light emitted from the second infrared light emitting diode 22b, the infrared light having only the second polarization direction DP2 passes through the second transmission polarizing plate 22c to form the second optical signal LS1.

この構成により、簡単な構成で、相互に交差する方向に偏光された第１光信号ＬＳ１と第２光信号ＬＳ２を確実に分離して送信することが可能となる。つまり、第１光信号ＬＳ１および第２光信号ＬＳ２は赤外線光信号送信装置２から赤外線光信号受信装置３までの空間で混在して送信されるが、光信号として相互に干渉することはない。したがって、上述したとおり、第１光信号ＬＳ１と第２光信号ＬＳ２との間での光信号の干渉によるノイズの発生を防止して、光信号の正確な送信を容易に行なうことができる。   With this configuration, it is possible to reliably separate and transmit the first optical signal LS1 and the second optical signal LS2 polarized in directions intersecting each other with a simple configuration. That is, the first optical signal LS1 and the second optical signal LS2 are transmitted mixedly in the space from the infrared optical signal transmission device 2 to the infrared optical signal reception device 3, but do not interfere with each other as optical signals. Therefore, as described above, it is possible to prevent the generation of noise due to the interference of the optical signal between the first optical signal LS1 and the second optical signal LS2, and to easily perform the accurate transmission of the optical signal.

なお、第１赤外発光ダイオード２１ｂおよび第２赤外発光ダイオード２２ｂが発生する赤外線は、例えば波長を０．７５μｍから０．９５μｍ程度までの範囲とすることができる。   The infrared rays generated by the first infrared light emitting diode 21b and the second infrared light emitting diode 22b can have a wavelength in the range of, for example, about 0.75 μm to 0.95 μm.

第１光信号送信部２１は、パルス変調回路２３ｍおよびＬＥＤ駆動回路２３ｂを備える第１発光制御回路部２３により制御される。パルス変調回路２３ｍは、第１入力信号Ｓｉｎ１をパルス変調して第１赤外発光ダイオード２１ｂを駆動する変調パルスを生成し、第１赤外発光ダイオード２１ｂを駆動するＬＥＤ駆動回路２３ｂへ変調パルスを出力する。ＬＥＤ駆動回路２３ｂは、入力された変調パルスに従って第１赤外発光ダイオード２１ｂを駆動して赤外線で構成される第１光信号ＬＳ１を発生させる。   The first optical signal transmission unit 21 is controlled by a first light emission control circuit unit 23 including a pulse modulation circuit 23m and an LED drive circuit 23b. The pulse modulation circuit 23m modulates the first input signal Sin1 to generate a modulation pulse for driving the first infrared light emitting diode 21b, and sends the modulation pulse to the LED driving circuit 23b for driving the first infrared light emitting diode 21b. Output. The LED drive circuit 23b drives the first infrared light emitting diode 21b according to the input modulation pulse to generate a first optical signal LS1 composed of infrared rays.

また、第２光信号送信部２２は、パルス変調回路２４ｍおよびＬＥＤ駆動回路２４ｂを備える第２発光制御回路部２４により制御される。パルス変調回路２４ｍは、第２入力信号Ｓｉｎ２をパルス変調して第２赤外発光ダイオード２２ｂを駆動する変調パルスを生成し、第２赤外発光ダイオード２２ｂを駆動するＬＥＤ駆動回路２４ｂへ変調パルスを出力する。ＬＥＤ駆動回路２４ｂは、入力された変調パルスに従って第２赤外発光ダイオード２２ｂを駆動して赤外線で構成される第２光信号ＬＳ２を発生させる。   The second optical signal transmission unit 22 is controlled by a second light emission control circuit unit 24 including a pulse modulation circuit 24m and an LED drive circuit 24b. The pulse modulation circuit 24m modulates the second input signal Sin2 to generate a modulation pulse for driving the second infrared light emitting diode 22b, and sends the modulation pulse to the LED driving circuit 24b for driving the second infrared light emitting diode 22b. Output. The LED drive circuit 24b drives the second infrared light emitting diode 22b according to the input modulation pulse to generate a second optical signal LS2 composed of infrared rays.

本実施の形態に係る赤外線光信号受信装置３は、赤外線で構成され第１偏光方向ＤＰ１に偏光された第１光信号ＬＳ１および赤外線で構成され第１偏光方向ＤＰ１と交差する第２偏光方向ＤＰ２に偏光された第２光信号ＬＳ２を受信する構成としてある。また、赤外線光信号受信装置３は、第１光信号ＬＳ１を受信する第１光信号受信部３１と、第２光信号ＬＳ２を受信する第２光信号受信部３２とを備える。   The infrared optical signal receiving device 3 according to the present embodiment includes a first optical signal LS1 composed of infrared rays and polarized in the first polarization direction DP1, and a second polarization direction DP2 composed of infrared rays and intersecting the first polarization direction DP1. The second optical signal LS2 polarized in the direction is received. The infrared optical signal receiving device 3 includes a first optical signal receiving unit 31 that receives the first optical signal LS1 and a second optical signal receiving unit 32 that receives the second optical signal LS2.

したがって、簡単な構成で相互に交差する方向に偏光された第１光信号ＬＳ１と第２光信号ＬＳ２を分離して受信することができるので、第１光信号ＬＳ１と第２光信号ＬＳ２との間での光信号の干渉によるノイズの発生を防止することが可能となり、光信号の正確な受信を容易に行なうことができる。   Therefore, since the first optical signal LS1 and the second optical signal LS2 polarized in directions crossing each other with a simple configuration can be separated and received, the first optical signal LS1 and the second optical signal LS2 can be received. It is possible to prevent the generation of noise due to interference of optical signals between them, and it is possible to easily receive the optical signals accurately.

第１光信号受信部３１は、第１光信号ＬＳ１を通過させる第１受信用偏光板３１ｃと、第１受信用偏光板３１ｃが通過させた第１光信号ＬＳ１を受光する第１受光素子３１ｒとを備える。つまり、混在した状態で赤外線光信号送信装置２から送信されてきた第１光信号ＬＳ１および第２光信号ＬＳ２を第１受信用偏光板３１ｃにより分離し、第１光信号ＬＳ１のみを通過させて第１受光素子３１ｒで第１光信号ＬＳ１を受信する。   The first optical signal receiver 31 includes a first receiving polarizing plate 31c that transmits the first optical signal LS1, and a first light receiving element 31r that receives the first optical signal LS1 that is transmitted by the first receiving polarizing plate 31c. With. That is, the first optical signal LS1 and the second optical signal LS2 transmitted from the infrared optical signal transmission device 2 in a mixed state are separated by the first reception polarizing plate 31c, and only the first optical signal LS1 is allowed to pass through. The first light signal LS1 is received by the first light receiving element 31r.

また、第２光信号受信部３２は、第２光信号ＬＳ２を通過させる第２受信用偏光板３２ｃと、第２受信用偏光板３２ｃが通過させた第２光信号ＬＳ２を受光する第２受光素子３２ｒとを備える。つまり、混在した状態で赤外線光信号送信装置２から送信されてきた第１光信号ＬＳ１および第２光信号ＬＳ２を第２受信用偏光板３２ｃにより分離し、第２光信号ＬＳ２のみを通過させて第２受光素子３２ｒで第２光信号ＬＳ２を受信する。   The second optical signal receiver 32 receives the second optical signal LS2 transmitted by the second optical polarizer LS2 and the second optical polarizer 32c that transmits the second optical signal LS2. And an element 32r. That is, the first optical signal LS1 and the second optical signal LS2 transmitted from the infrared optical signal transmission device 2 in a mixed state are separated by the second reception polarizing plate 32c, and only the second optical signal LS2 is allowed to pass. The second light signal LS2 is received by the second light receiving element 32r.

したがって、赤外線光信号受信装置３は、簡単な構成で、相互に交差する方向に偏光された第１光信号ＬＳ１と第２光信号ＬＳ２を分離して受信することが可能となる。なお、第１受光素子３１ｒおよび第２受光素子３２ｒは、赤外線に対して受光感度を有する、例えばフォトダイオードまたはフォトトランジスタで構成することができる。   Therefore, the infrared optical signal receiving device 3 can receive the first optical signal LS1 and the second optical signal LS2 separated in directions intersecting with each other with a simple configuration. In addition, the 1st light receiving element 31r and the 2nd light receiving element 32r can be comprised by the photodiode or phototransistor which has a light reception sensitivity with respect to infrared rays, for example.

第１光信号受信部３１が検出した第１光信号ＬＳ１は、光電変換されて第１受光検出回路部３３へ電気信号として入力され適宜の信号処理がなされる。第１受光検出回路部３３は、増幅回路３３ｂおよびパルス復調回路３３ｃを備える。増幅回路３３ｂは第１光信号ＬＳ１を光電変換した電気信号を増幅してパルス復調回路３３ｃへ入力する。パルス復調回路３３ｃは、入力された電気信号をパルス復調し、パルス変調回路２３ｍでパルス変調された第１入力信号Ｓｉｎ１に対応する第１出力信号Ｓｏｕｔ１を出力する。   The first optical signal LS1 detected by the first optical signal receiving unit 31 is photoelectrically converted and input as an electrical signal to the first light receiving detection circuit unit 33, and appropriate signal processing is performed. The first light reception detection circuit unit 33 includes an amplification circuit 33b and a pulse demodulation circuit 33c. The amplifier circuit 33b amplifies an electrical signal obtained by photoelectrically converting the first optical signal LS1, and inputs the amplified signal to the pulse demodulation circuit 33c. The pulse demodulating circuit 33c performs pulse demodulation on the input electrical signal, and outputs a first output signal Sout1 corresponding to the first input signal Sin1 pulse-modulated by the pulse modulation circuit 23m.

また、第２光信号受信部３２が検出した第１光信号ＬＳ２は、光電変換されて第２受光検出回路部３４へ電気信号として入力され適宜の信号処理がなされる。第２受光検出回路部３４は、増幅回路３４ｂおよびパルス復調回路３４ｃを備える。増幅回路３４ｂは第２光信号ＬＳ２を光電変換した電気信号を増幅してパルス復調回路３４ｃへ入力する。パルス復調回路３４ｃは、入力された電気信号をパルス復調し、パルス変調回路２４ｍでパルス変調された第２入力信号Ｓｉｎ２に対応する第２出力信号Ｓｏｕｔ２を出力する。   The first optical signal LS2 detected by the second optical signal receiving unit 32 is photoelectrically converted and input as an electrical signal to the second light receiving detection circuit unit 34, and appropriate signal processing is performed. The second light reception detection circuit unit 34 includes an amplification circuit 34b and a pulse demodulation circuit 34c. The amplifier circuit 34b amplifies the electric signal obtained by photoelectrically converting the second optical signal LS2, and inputs the amplified signal to the pulse demodulation circuit 34c. The pulse demodulating circuit 34c demodulates the input electric signal and outputs a second output signal Sout2 corresponding to the second input signal Sin2 pulse-modulated by the pulse modulation circuit 24m.

つまり、第１入力信号Ｓｉｎ１および第２入力信号Ｓｉｎ２にそれぞれ対応する第１出力信号Ｓｏｕｔ１および第２出力信号Ｓｏｕｔ２を区別して赤外線光信号通信（赤外線光信号送信および赤外線光信号受信）することが可能である。   In other words, infrared light signal communication (infrared light signal transmission and infrared light signal reception) can be performed by distinguishing the first output signal Sout1 and the second output signal Sout2 corresponding to the first input signal Sin1 and the second input signal Sin2, respectively. It is.

また、周波数変調によらず、簡単に構成できるパルス変調（例えばＲＺ信号方式）により通信制御することから、周波数変調回路／周波数復調回路が不要となり、回路構成を簡略化することが可能となる。   Further, since communication control is performed by pulse modulation (for example, RZ signal system) that can be easily configured regardless of frequency modulation, a frequency modulation circuit / frequency demodulation circuit is not required, and the circuit configuration can be simplified.

本実施の形態に係る赤外線光信号送信装置２および赤外線光信号受信装置３で構成される赤外線光信号通信装置１によれば、簡単な構成で第１光信号ＬＳ１と第２光信号ＬＳ２との間での光信号の干渉によるノイズの発生を防止することが可能となり、光信号の正確な送信および受信が可能となるので、正確で信頼性の高い赤外線光信号による通信を実現することができる。   According to the infrared optical signal communication apparatus 1 configured by the infrared optical signal transmission apparatus 2 and the infrared optical signal reception apparatus 3 according to the present embodiment, the first optical signal LS1 and the second optical signal LS2 can be easily configured. It is possible to prevent the generation of noise due to interference of optical signals between them, and it is possible to accurately transmit and receive optical signals, so that it is possible to realize communication with accurate and reliable infrared optical signals .

第１発光制御回路部２３、第１光信号送信部２１、第１光信号受信部３１および第１受光検出回路部３３は、例えばステレオ音響装置でのステレオ信号の右チャンネルの信号（右信号ｃｈＲ）に対応させて動作させる形態とすることができる。つまり、第１入力信号Ｓｉｎ１に対応する右信号ｃｈＲを第１光信号ＬＳ１として送信し、第１出力信号Ｓｏｕｔ１として出力することが可能となる。   The first light emission control circuit unit 23, the first optical signal transmission unit 21, the first optical signal reception unit 31, and the first light reception detection circuit unit 33 are, for example, a right channel signal (right signal chR) of a stereo signal in a stereo sound device. ) Can be made to operate in accordance with. That is, the right signal chR corresponding to the first input signal Sin1 can be transmitted as the first optical signal LS1 and output as the first output signal Sout1.

また、第２発光制御回路部２４、第２光信号送信部２２、第２光信号受信部３２および第２受光検出回路部３４は、例えばステレオ音響装置でのステレオ信号の左チャンネルの信号（右信号ｃｈＬ）に対応させて動作させる形態とすることができる。つまり、第２入力信号Ｓｉｎ２に対応する左信号ｃｈＬを第２光信号ＬＳ２として送信し、第２出力信号Ｓｏｕｔ２として出力することが可能となる。   In addition, the second light emission control circuit unit 24, the second optical signal transmission unit 22, the second optical signal reception unit 32, and the second light reception detection circuit unit 34 are, for example, a left channel signal (right side) of a stereo signal in a stereo sound device. It can be configured to operate corresponding to the signal chL). That is, the left signal chL corresponding to the second input signal Sin2 can be transmitted as the second optical signal LS2 and output as the second output signal Sout2.

したがって、本実施の形態に係る赤外線光信号通信装置１（赤外線光信号送信装置２、赤外線光信号受信装置３）をステレオ音響装置に適用した場合には、ステレオ信号の左右両チャンネル間の干渉によるノイズの発生を完全に抑止することができる。   Therefore, when the infrared optical signal communication apparatus 1 (infrared optical signal transmission apparatus 2 and infrared optical signal reception apparatus 3) according to the present embodiment is applied to a stereo acoustic apparatus, it is caused by interference between the left and right channels of the stereo signal. Generation of noise can be completely suppressed.

上述したとおり、本実施の形態に係る赤外線光信号通信装置１では、垂直方向（第１偏光方向ＤＰ１）で偏光された第１光信号ＬＳ１および水平方向（第２偏光方向ＤＰ２）で偏光された第２光信号ＬＳ２は、混在した状態で赤外線光信号送信装置２から赤外線光信号受信装置３までの空間を伝送される。しかし、第１光信号ＬＳ１および第２光信号ＬＳ２は、相互に偏光方向を異ならせていることから、光信号として相互に干渉することはなく、ノイズの発生を防止して光信号の正確な送信を行なうことが可能となる。   As described above, in the infrared optical signal communication device 1 according to the present embodiment, the first optical signal LS1 polarized in the vertical direction (first polarization direction DP1) and polarized in the horizontal direction (second polarization direction DP2). The second optical signal LS2 is transmitted through the space from the infrared optical signal transmitter 2 to the infrared optical signal receiver 3 in a mixed state. However, since the first optical signal LS1 and the second optical signal LS2 have different polarization directions from each other, they do not interfere with each other as an optical signal, and the occurrence of noise is prevented and the optical signal is accurately detected. Transmission can be performed.

＜実施の形態２＞
図２は、本発明の実施の形態２に係る赤外線光信号送信装置の概略を構成ブロックで示すブロック図である。 <Embodiment 2>
FIG. 2 is a block diagram showing an outline of the infrared optical signal transmission apparatus according to the second embodiment of the present invention in a configuration block.

本実施の形態に係る赤外線光信号送信装置２は、実施の形態１で用いた赤外発光ダイオード（第１赤外発光ダイオード２１ｂ、第２赤外発光ダイオード２２ｂ）および送信用偏光板（第１送信用偏光板２１ｃ、第２送信用偏光板２２ｃ）の代わりにレーザダイオードを適用する。その他の構成は、基本的に実施の形態１と同様であるので、主に異なる点について説明する。   The infrared optical signal transmission device 2 according to the present embodiment includes the infrared light emitting diodes (first infrared light emitting diode 21b and second infrared light emitting diode 22b) used in the first embodiment and a transmission polarizing plate (first A laser diode is applied instead of the transmission polarizing plate 21c and the second transmission polarizing plate 22c). Since the other configuration is basically the same as that of the first embodiment, different points will be mainly described.

つまり、本実施の形態では、第１光信号送信部２１は、第１偏光方向ＤＰ１に偏光した第１光信号ＬＳ１を発光する第１レーザダイオード２１ｄを備える。また、第２光信号送信部２２は、第２偏光方向ＤＰ２に偏光した第２光信号ＬＳ２を発光する第２レーザダイオード２２ｄを備える。   That is, in the present embodiment, the first optical signal transmitter 21 includes the first laser diode 21d that emits the first optical signal LS1 polarized in the first polarization direction DP1. The second optical signal transmitter 22 includes a second laser diode 22d that emits the second optical signal LS2 polarized in the second polarization direction DP2.

レーザダイオードは、発光ダイオードのようにランダム偏光ではなく、直線偏光された光を出射することから、偏光板なしで直線偏光された光信号を送信することができる。したがって、第１レーザダイオード２１ｄを偏光の軸が例えば垂直方向となる方向に配置し、第２レーザダイオード２２ｄを偏光の軸が例えば水平方向となる方向に配置する。   Since the laser diode emits linearly polarized light instead of random polarized light like the light emitting diode, it can transmit a linearly polarized optical signal without a polarizing plate. Therefore, the first laser diode 21d is arranged in a direction in which the polarization axis is in the vertical direction, for example, and the second laser diode 22d is arranged in a direction in which the polarization axis is in the horizontal direction, for example.

レーザダイオード（第１レーザダイオード２１ｄおよび第２レーザダイオード２２ｄ）を相互に例えば９０度ずらした状態で配置することにより、送信用偏光板（第１送信用偏光板２１ｃおよび第２送信用偏光板２２ｃ）を省略して部品点数を低減した簡単な構成で、相互に交差する方向に偏光された第１光信号ＬＳ１と第２光信号ＬＳ２を送信することが可能となる。送信用偏光板を用いる必要がないことから、赤外線光信号送信装置２を小型化することが可能となり、また、送信用偏光板の取付工程を省略して製造工程を簡略化することができる。   By arranging the laser diodes (first laser diode 21d and second laser diode 22d) so as to be shifted from each other by 90 degrees, for example, a transmission polarizing plate (first transmission polarizing plate 21c and second transmission polarizing plate 22c). It is possible to transmit the first optical signal LS1 and the second optical signal LS2 polarized in directions intersecting each other with a simple configuration in which the number of components is reduced. Since it is not necessary to use a transmission polarizing plate, it is possible to reduce the size of the infrared light signal transmission device 2, and it is possible to simplify the manufacturing process by omitting the step of attaching the transmission polarizing plate.

また、第１レーザダイオード２１ｄおよび第２レーザダイオード２２ｄは、アイセーフ型とすることが好ましい。この構成により、安全性を向上させることができるので、民生用に利用できる赤外線光信号送信装置２とすることが可能となる。アイセーフ型は、適宜のレンズを用いてスポットサイズを拡大すること、あるいはレーザダイオードの発振波長を約１．４μｍから約２．６μｍまでの間とすることなどで実現することが可能である。   The first laser diode 21d and the second laser diode 22d are preferably eye-safe types. With this configuration, safety can be improved, so that the infrared optical signal transmission device 2 that can be used for consumer use can be obtained. The eye-safe type can be realized by enlarging the spot size using an appropriate lens, or by setting the oscillation wavelength of the laser diode between about 1.4 μm and about 2.6 μm.

レーザダイオードを駆動するために、ＬＥＤ駆動回路２３ｂおよびＬＥＤ駆動回路２４ｂの代わりにＬＤ駆動回路２３ｃおよびＬＤ駆動回路２４ｃを適用する。つまり、ＬＤ駆動回路２３ｃにより第１レーザダイオード２１ｄを駆動し、ＬＤ駆動回路２４ｃにより第２レーザダイオード２２ｄを駆動する。   In order to drive the laser diode, the LD drive circuit 23c and the LD drive circuit 24c are applied instead of the LED drive circuit 23b and the LED drive circuit 24b. That is, the first laser diode 21d is driven by the LD drive circuit 23c, and the second laser diode 22d is driven by the LD drive circuit 24c.

なお、実施の形態１と同様に、赤外線光信号受信装置３を適用して赤外線光信号通信装置１を構成することが可能である。   As in the first embodiment, the infrared optical signal communication apparatus 1 can be configured by applying the infrared optical signal receiving apparatus 3.

＜実施の形態３＞
図３は、本発明の実施の形態３に係る赤外線光信号受信装置の概略を示す構成概念図であり、（Ａ）は起立状態での使用例を示す使用概念図、（Ｂ）は起立状態で使用した場合の各構成要素の配置状態を概念的に示す正面図である。図４は、図３（Ｂ）の矢符Ｘ方向から見た各構成要素の配置状態を拡大して概念的に示す拡大側面図である。 <Embodiment 3>
FIG. 3 is a configuration conceptual diagram showing an outline of an infrared optical signal receiving device according to Embodiment 3 of the present invention, (A) is a usage conceptual diagram showing an example of use in a standing state, and (B) is a standing state. It is a front view which shows notionally the arrangement | positioning state of each component at the time of using by. FIG. 4 is an enlarged side view conceptually showing an enlarged arrangement state of each component viewed from the arrow X direction in FIG.

本実施の形態に係る赤外線光信号受信装置４は、ワイヤレスイヤホン（携帯移動式音声発生装置）として構成してある。つまり、イヤホンであるから、右耳用イヤホン４Ｒ（赤外線光信号受信装置３の右信号ｃｈＲを出力する側に対応）および左耳用イヤホン４Ｌ（赤外線光信号受信装置３の左信号ｃｈＬを出力する側に対応）としてそれぞれ分離して利用できるように構成してある。以下、右耳用イヤホン４Ｒおよび左耳用イヤホン４Ｌを区別する必要がない場合は、単に赤外線光信号受信装置４と記載することがある。   The infrared optical signal receiver 4 according to the present embodiment is configured as a wireless earphone (portable mobile sound generator). That is, since it is an earphone, the right earphone 4R (corresponding to the side that outputs the right signal chR of the infrared light signal receiving device 3) and the left earphone 4L (the left signal chL of the infrared light signal receiving device 3) are output. It corresponds to each side) and can be used separately. Hereinafter, when there is no need to distinguish the right-ear earphone 4R and the left-ear earphone 4L, they may be simply referred to as the infrared light signal receiving device 4.

その他の構成は、基本的に実施の形態１の赤外線光信号受信装置３（の左右いずれかの信号を出力する側）と同様であるので、実施の形態１の説明を適宜援用して、主に異なる点について説明する。なお、ワイヤレスイヤホンの実施例に限らずワイヤレスヘッドホンなどとして構成することも可能である。   Since the other configuration is basically the same as that of the infrared optical signal receiving device 3 according to the first embodiment (the one that outputs either the left or right signal), the description of the first embodiment is appropriately incorporated, Different points will be described. Note that the present invention is not limited to the embodiment of the wireless earphone, and may be configured as a wireless headphone or the like.

右耳用イヤホン４Ｒおよび左耳用イヤホン４Ｌは、機構的、構造的には対称的な配置とすれば良い。また、受信用偏光板は、右耳用イヤホン４Ｒ（右信号ｃｈＲ、例えば、第１偏光方向ＤＰ１に偏光された第１光信号ＬＳ１を受信する。実施の形態１参照。）では、例えば垂直方向（第１偏光方向ＤＰ１）の偏光を通過させる偏光板とし、左用イヤホン４Ｌ（左信号ｃｈＬ、例えば、第２偏光方向ＤＰ２に偏光された第２光信号ＬＳ２を受信する。実施の形態１参照。）では、例えば水平方向（第２偏光方向ＤＰ２）の偏光を通過させる偏光板とすることにより、第１光信号ＬＳ１および第２光信号ＬＳ２をそれぞれで分離して検出することができる。   The right-ear earphone 4R and the left-ear earphone 4L may be symmetrically arranged mechanically and structurally. Further, the receiving polarizing plate receives the right earphone 4R (right signal chR, for example, the first optical signal LS1 polarized in the first polarization direction DP1, see Embodiment 1.), for example, in the vertical direction. The left earphone 4L (left signal chL, for example, the second optical signal LS2 polarized in the second polarization direction DP2 is received as a polarizing plate that transmits polarized light in the first polarization direction DP1. See Embodiment 1. ), For example, by using a polarizing plate that transmits polarized light in the horizontal direction (second polarization direction DP2), the first optical signal LS1 and the second optical signal LS2 can be separately detected.

つまり、右耳用イヤホン４Ｒには第１偏光方向ＤＰ１に軸をもつ偏光板が配置され、第１偏光方向ＤＰ１の偏光（右信号ｃｈＲ＝第１光信号ＬＳ１）だけを受信する。また、左耳用イヤホン４Ｌには第２偏光方向ＤＰ２に軸をもつ偏光板が配置され、第２偏光方向ＤＰ２の偏光（左信号ｃｈＬ＝第２光信号ＬＳ２）だけを受信する。   That is, the right-ear earphone 4R is provided with a polarizing plate having an axis in the first polarization direction DP1, and receives only polarized light in the first polarization direction DP1 (right signal chR = first optical signal LS1). The left earphone 4L is provided with a polarizing plate having an axis in the second polarization direction DP2, and receives only the polarized light in the second polarization direction DP2 (left signal chL = second optical signal LS2).

したがって、偏光板を除いて左右共通の構成とできることから、主に一方（右耳用イヤホン４Ｒ）について説明する。   Therefore, since the left and right configurations can be the same except for the polarizing plate, one (right earphone 4R) will be mainly described.

右耳用イヤホン４Ｒ（赤外線光信号受信装置４）は、イヤホンの外形を保持するための筐体４１、実施の形態１の赤外線光信号受信装置３（の右信号ｃｈＲを出力する側）に対応するイヤホン受信部４２およびイヤホン受信部４２が受信した光信号を音声に変換して出力するスピーカ部４３を備える。   The right-ear earphone 4R (infrared light signal receiving device 4) corresponds to the casing 41 for holding the outer shape of the earphone, the infrared light signal receiving device 3 in the first embodiment (the side that outputs the right signal chR). And a speaker unit 43 that converts the optical signal received by the earphone receiving unit 42 into sound and outputs the sound.

イヤホン受信部４２は、各構成要素（受光用レンズ４２ｂ、イヤホン受信用偏光板４２ｃ、イヤホン受光素子４２ｄ、増幅回路４２ｅ、パルス復調回路４２ｆ）を筐体４１に形成された収納部４１ｓに収納している。また、筐体４１には、イヤホン受信部４２、スピーカ部４３の電源として機能する電池４４が収納してある。   The earphone receiving unit 42 stores each component (light receiving lens 42b, earphone receiving polarizing plate 42c, earphone light receiving element 42d, amplification circuit 42e, pulse demodulation circuit 42f) in a storage unit 41s formed in the casing 41. ing. In addition, the housing 41 houses a battery 44 that functions as a power source for the earphone receiver 42 and the speaker 43.

イヤホン受信部４２は、赤外線光信号送信装置２から送信された光信号（例えば第１光信号ＬＳ１および第２光信号ＬＳ２）を集光する受光用レンズ４２ｂ、受光用レンズ４２ｂが集光した光信号の内、特定方向に偏光された光信号（例えば、第１偏光方向ＤＰ１に偏光された第１光信号ＬＳ１）のみを通過させるイヤホン受信用偏光板４２ｃ、受信用偏光板４２ｃが通過させた第１光信号ＬＳ１を光電変換して電気信号を出力するイヤホン受光素子４２ｄ、イヤホン受光素子４２ｄが出力した電気信号を増幅してパルス復調回路４２ｆへ入力する増幅回路４２ｅ、入力された電気信号をパルス復調するパルス復調回路４２ｆを収納している。   The earphone receiver 42 collects the optical signals transmitted from the infrared optical signal transmitter 2 (for example, the first optical signal LS1 and the second optical signal LS2), and the light collected by the light receiving lens 42b. Of the signals, the earphone receiving polarizing plate 42c and the receiving polarizing plate 42c pass only the optical signal polarized in a specific direction (for example, the first optical signal LS1 polarized in the first polarization direction DP1). An earphone light receiving element 42d that photoelectrically converts the first optical signal LS1 and outputs an electric signal, an amplification circuit 42e that amplifies the electric signal output from the earphone light receiving element 42d and inputs the amplified electric signal to the pulse demodulation circuit 42f, and the input electric signal A pulse demodulation circuit 42f for performing pulse demodulation is housed.

イヤホン受信部４２は、受光用レンズ４２ｂ、イヤホン受信用偏光板４２ｃ、イヤホン受光素子４２ｄ、増幅回路４２ｅ、パルス復調回路４２ｆを実装して筐体４１の内側に形成された円筒状空間である収納部４１ｓに回動可能に配置してある。つまり、イヤホン受信部４２（イヤホン受信用偏光板４２ｃ、イヤホン受光素子４２ｄ）は、重り４２ｗを備え、イヤホン受信用偏光板４２ｃが第１偏光方向ＤＰ１に対応する第１光信号ＬＳ１を常に通過させる方向に矢符Ｒｏｔ方向で回動する構成としてある。   The earphone receiver 42 is a cylindrical space formed inside the housing 41 by mounting a light receiving lens 42b, an earphone receiving polarizing plate 42c, an earphone light receiving element 42d, an amplifier circuit 42e, and a pulse demodulation circuit 42f. The part 41s is rotatably arranged. That is, the earphone receiving unit 42 (earphone receiving polarizing plate 42c, earphone light receiving element 42d) includes a weight 42w, and the earphone receiving polarizing plate 42c always passes the first optical signal LS1 corresponding to the first polarization direction DP1. It is set as the structure rotated by the arrow Rot direction to a direction.

したがって、イヤホン受信部４２が重り４２ｗを備えることから、実施の形態１の第１光信号受信部３１に対応するイヤホン受信用偏光板４２ｃとイヤホン受光素子４２ｄは、第１偏光方向ＤＰ１に対応する第１光信号ＬＳ１を常に通過させて受信（受光）することが可能となる。   Therefore, since the earphone receiving unit 42 includes the weight 42w, the earphone receiving polarizing plate 42c and the earphone light receiving element 42d corresponding to the first optical signal receiving unit 31 of the first embodiment correspond to the first polarization direction DP1. The first optical signal LS1 can always be received and received (received).

また、左耳用イヤホン４Ｌも同様に重り（４２ｗ）を備え、イヤホン受信用偏光板（４２ｃ）を回動させることから、実施の形態１の第２光信号受信部３２に対応するイヤホン受信用偏光板（４２ｃ）とイヤホン受光素子（４２ｄ）は、第２偏光方向ＤＰ２に対応する第２光信号ＬＳ２を常に通過させて受信（受光）することが可能となる。   Similarly, the left-ear earphone 4L includes a weight (42w) and rotates the earphone-receiving polarizing plate (42c). Therefore, the left-ear earphone 4L corresponds to the second optical signal receiving unit 32 of the first embodiment. The polarizing plate (42c) and the earphone light receiving element (42d) can always receive and receive (receive light) the second optical signal LS2 corresponding to the second polarization direction DP2.

したがって、赤外線光信号受信装置４の位置が偏光方向（第１偏光方向ＤＰ１、第２偏光方向ＤＰ２）に対して変動した場合でも、イヤホン受信用偏光板４２ｃの方向を変更（回動）させるので、イヤホン受信用偏光板４２ｃの位置を偏光方向に追随させて第１光信号ＬＳ１および第２光信号ＬＳ２を確実に受信することが可能となる。   Therefore, even when the position of the infrared optical signal receiving device 4 fluctuates with respect to the polarization direction (first polarization direction DP1, second polarization direction DP2), the direction of the earphone reception polarizing plate 42c is changed (rotated). The first optical signal LS1 and the second optical signal LS2 can be reliably received by following the position of the polarizing plate 42c for receiving earphones in the polarization direction.

本実施の形態では、重り４２ｗを備えることから、垂直方向（第１偏光方向ＤＰ１）、水平方向（第２偏光方向ＤＰ２）に対応する第１光信号ＬＳ１および第２光信号ＬＳ２を容易かつ正確に検出することが可能となるが、垂直方向および水平方向に対して一定の角度を有する偏光方向に対しても重り４２ｗとイヤホン受信用偏光板４２ｃとの関係を一定の角度に対応させることにより検出することが可能である。また、回動機構としては、少なくともイヤホン受光用偏光板４２ｃおよびイヤホン受光素子４２ｄ（実施の形態１での第１光信号受信部３１、第２光信号受信部３２に対応する構成要素）を対象とすれば良い。   In the present embodiment, since the weight 42w is provided, the first optical signal LS1 and the second optical signal LS2 corresponding to the vertical direction (first polarization direction DP1) and the horizontal direction (second polarization direction DP2) can be easily and accurately. However, the relationship between the weight 42w and the earphone receiving polarizing plate 42c is made to correspond to a certain angle even in the polarization direction having a certain angle with respect to the vertical direction and the horizontal direction. It is possible to detect. Further, as the rotation mechanism, at least the earphone light receiving polarizing plate 42c and the earphone light receiving element 42d (components corresponding to the first optical signal receiving unit 31 and the second optical signal receiving unit 32 in the first embodiment) are targeted. What should I do?

スピーカ部４３は、通常のイヤホンと同様、磁石４３ｍ、コイル４３ｃ、振動子４３ｖなどを備える。イヤホン受信部４２の出力信号によりコイル４３ｃを駆動して振動子４３ｖを振動させることにより、イヤホンとして機能する。   The speaker unit 43 includes a magnet 43m, a coil 43c, a vibrator 43v, and the like, like a normal earphone. The coil 43c is driven by the output signal of the earphone receiver 42 to vibrate the vibrator 43v, thereby functioning as an earphone.

上述したとおり、赤外線光信号受信装置４は、両チャンネルの信号間での干渉がなく、ノイズの発生がないことから、音質の劣化が無く、また、傾きに影響されないイヤホンとすることが可能となる。   As described above, the infrared light signal receiving device 4 has no interference between the signals of both channels and no noise is generated, so that it is possible to make an earphone that is not deteriorated in sound quality and is not affected by the inclination. Become.

図３、図４では、起立状態で使用される場合での赤外線光信号受信装置４の構成を説明したが、上述したとおり、赤外線光信号受信装置４は、傾けられた状態でもワイヤレスイヤホンとしての機能を継続することが可能である。傾けられた状態での赤外線光信号受信装置４について、図５、図６により説明する。   3 and 4, the configuration of the infrared optical signal receiving device 4 when used in the standing state has been described. However, as described above, the infrared optical signal receiving device 4 can be used as a wireless earphone even in a tilted state. It is possible to continue the function. The infrared optical signal receiving device 4 in the tilted state will be described with reference to FIGS.

図５は、図３に示した赤外線光信号受信装置が傾けられた場合の状態を説明する説明図であり、（Ａ）は起立状態から右側に４５度傾いた場合の使用例を示す使用概念図、（Ｂ）は（Ａ）での各構成要素の配置状態を概念的に示す正面図である。   FIG. 5 is an explanatory diagram for explaining a state when the infrared optical signal receiving device shown in FIG. 3 is tilted. FIG. 5A is a usage concept showing an example of use when tilted 45 degrees to the right from the standing state. FIG. 4B is a front view conceptually showing an arrangement state of each component in FIG.

例えば、赤外線光信号受信装置４が起立状態から右側に４５度傾けられた場合、イヤホン受信用偏光板４２ｃ（イヤホン受信部４２）は、重り４２ｗの作用によって起立状態の位置から４５度回動して垂直状態（第１偏光方向ＤＰ１）を維持する。つまり、イヤホン受信用偏光板４２ｃ（イヤホン受信部４２）は、例えば右方向へ４５度傾けられた状態でも第１偏光方向ＤＰ１に対応する第１光信号ＬＳ１を通過させるように回動する構成としてある。   For example, when the infrared light signal receiving device 4 is tilted 45 degrees to the right from the standing state, the earphone receiving polarizing plate 42c (earphone receiving unit 42) rotates 45 degrees from the standing position by the action of the weight 42w. Thus, the vertical state (first polarization direction DP1) is maintained. That is, the earphone receiving polarizing plate 42c (earphone receiving section 42) is configured to rotate so as to pass the first optical signal LS1 corresponding to the first polarization direction DP1 even when tilted 45 degrees to the right, for example. is there.

図６は、図３に示した赤外線光信号受信装置が傾けられた場合の状態を説明する説明図であり、（Ａ）は起立状態から水平方向に傾いた場合の使用例を示す使用概念図、（Ｂ）は（Ａ）での各構成要素の配置状態を概念的に示す正面図である。   FIG. 6 is an explanatory diagram for explaining a state when the infrared optical signal receiving device shown in FIG. 3 is tilted, and (A) is a conceptual diagram showing a usage example when tilting in a horizontal direction from a standing state. (B) is a front view which shows notionally the arrangement state of each component in (A).

例えば、赤外線光信号受信装置４が起立状態から右側に９０度傾けられた場合（起立状態から水平方向に傾けられた場合）、イヤホン受信用偏光板４２ｃ（イヤホン受信部４２）は、重り４２ｗの作用によって起立状態の位置から９０度回動して垂直状態（第１偏光方向ＤＰ１）を維持する。つまり、イヤホン受信用偏光板４２ｃ（イヤホン受信部４２）は、例えば右方向へ９０度傾けられた状態でも第１偏光方向ＤＰ１に対応する第１光信号ＬＳ１を通過させるように回動する構成としてある。   For example, when the infrared light signal receiving device 4 is tilted 90 degrees to the right from the standing state (when tilted in the horizontal direction from the standing state), the earphone receiving polarizing plate 42c (earphone receiving unit 42) has a weight 42w. The vertical rotation (first polarization direction DP1) is maintained by rotating 90 degrees from the standing position by the action. That is, the earphone receiving polarizing plate 42c (earphone receiving section 42) is configured to rotate so as to pass the first optical signal LS1 corresponding to the first polarization direction DP1 even when tilted 90 degrees to the right, for example. is there.

上述したとおり、赤外線光信号受信装置４は、ワイヤレスイヤホンの傾き状態によらず赤外線光信号送信装置２からの光信号（第１光信号ＬＳ１および第２光信号ＬＳ２）を分離して受信することが可能であり、実用性の高い赤外線光信号受信装置４（右耳用イヤホン４Ｒ、左耳用イヤホン４Ｌ）となる。   As described above, the infrared optical signal receiving device 4 separates and receives the optical signals (the first optical signal LS1 and the second optical signal LS2) from the infrared optical signal transmitting device 2 regardless of the tilt state of the wireless earphone. Therefore, the infrared light signal receiving device 4 (the right earphone 4R and the left earphone 4L) is highly practical.

本発明の実施の形態１に係る赤外線光信号送信装置、赤外線光信号受信装置、および赤外線光信号通信装置の概略を構成ブロックで示すブロック図である。It is a block diagram which shows the outline of the infrared-light signal transmitter which concerns on Embodiment 1 of this invention, an infrared-light signal receiver, and an infrared-light signal communication apparatus with a configuration block. 本発明の実施の形態２に係る赤外線光信号送信装置の概略を構成ブロックで示すブロック図である。It is a block diagram which shows the outline of the infrared optical signal transmission apparatus which concerns on Embodiment 2 of this invention with a structural block. 本発明の実施の形態３に係る赤外線光信号受信装置の概略を示す構成概念図であり、（Ａ）は起立状態での使用例を示す使用概念図、（Ｂ）は起立状態で使用した場合の各構成要素の配置状態を概念的に示す正面図である。It is a structure conceptual diagram which shows the outline of the infrared optical signal receiver which concerns on Embodiment 3 of this invention, (A) is a usage conceptual diagram which shows the usage example in a standing state, (B) is the case where it uses in a standing state It is a front view which shows notionally the arrangement | positioning state of each component of these. 図３（Ｂ）の矢符Ｘ方向から見た各構成要素の配置状態を拡大して概念的に示す拡大側面図である。FIG. 4 is an enlarged side view conceptually showing an enlarged arrangement state of each component viewed from the arrow X direction in FIG. 図３に示した赤外線光信号受信装置が傾けられた場合の状態を説明する説明図であり、（Ａ）は起立状態から右側に４５度傾いた場合の使用例を示す使用概念図、（Ｂ）は（Ａ）での各構成要素の配置状態を概念的に示す正面図である。It is explanatory drawing explaining the state when the infrared-light signal receiver shown in FIG. 3 is tilted, (A) is a usage conceptual diagram which shows the usage example when it inclines 45 degrees to the right side from a standing state, (B ) Is a front view conceptually showing an arrangement state of each component in (A). 図３に示した赤外線光信号受信装置が傾けられた場合の状態を説明する説明図であり、（Ａ）は起立状態から水平方向に傾いた場合の使用例を示す使用概念図、（Ｂ）は（Ａ）での各構成要素の配置状態を概念的に示す正面図である。It is explanatory drawing explaining the state at the time of the infrared optical signal receiver shown in FIG. 3 being inclined, (A) is a usage conceptual diagram which shows the usage example when it inclines in a horizontal direction from a standing state, (B). FIG. 3A is a front view conceptually showing an arrangement state of each component in (A). 従来の赤外線光信号送信装置、赤外線光信号受信装置、および赤外線光信号通信装置の概略を構成ブロックで示すブロック図である。It is a block diagram which shows the outline of the conventional infrared optical signal transmitter, an infrared optical signal receiver, and an infrared optical signal communication apparatus with a configuration block.

符号の説明Explanation of symbols

１ 赤外線光信号通信装置
２ 赤外線光信号送信装置
３ 赤外線光信号受信装置
４ 赤外線光信号受信装置
４Ｒ 右耳用イヤホン
４Ｌ 左耳用イヤホン
２１ 第１光信号送信部
２１ｂ 第１赤外発光ダイオード
２１ｃ 第１送信用偏光板
２１ｄ 第１レーザダイオード
２２ 第２光信号送信部
２２ｂ 第２赤外発光ダイオード
２２ｃ 第２送信用偏光板
２２ｄ 第２レーザダイオード
２３ 第１発光制御回路部
２４ 第２発光制御回路部
３１ 第１光信号受信部
３１ｃ 第１受信用偏光板
３１ｒ 第１受光素子
３２ 第２光信号受信部
３２ｃ 第２受信用偏光板
３２ｒ 第２受光素子
３３ 第１受光制御回路部
３４ 第２受光制御回路部
４１ 筐体
４１ｓ 収納部
４２ イヤホン受信部
４２ｂ 受光用レンズ
４２ｃ イヤホン受信用偏光板
４２ｄ イヤホン受光素子
４２ｗ 重り
４３ スピーカ部
ＤＰ１ 第１偏光方向
ＤＰ２ 第２偏光方向
ＬＳ１ 第１光信号
ＬＳ２ 第２光信号
Ｓｉｎ１ 第１入力信号
Ｓｉｎ２ 第２入力信号
Ｓｏｕｔ１ 第１出力信号
Ｓｏｕｔ２ 第２出力信号 DESCRIPTION OF SYMBOLS 1 Infrared optical signal communication apparatus 2 Infrared optical signal transmission apparatus 3 Infrared optical signal reception apparatus 4 Infrared optical signal reception apparatus 4R Earphone for right ear 4L Earphone for left ear 21 1st optical signal transmission part 21b 1st infrared light emitting diode 21c 1st 1 transmission polarizing plate 21d first laser diode 22 second optical signal transmission unit 22b second infrared light emitting diode 22c second transmission polarizing plate 22d second laser diode 23 first light emission control circuit unit 24 second light emission control circuit unit 31 1st light signal receiving part 31c 1st light-receiving polarizing plate 31r 1st light receiving element 32 2nd light signal receiving part 32c 2nd light-receiving polarizing plate 32r 2nd light receiving element 33 1st light receiving control circuit part 34 2nd light receiving control Circuit unit 41 Housing 41s Storage unit 42 Earphone receiving unit 42b Light receiving lens 42c Earphone receiving polarizing plate 42d Earphone light receiving element 42w weight 43 speaker unit DP1 first polarization direction DP2 second polarization direction LS1 first optical signal LS2 second optical signal Sin1 first input signal Sin2 second input signal Sout1 first output signal Sout2 second output signal

Claims (11)

赤外線で構成された第１光信号および赤外線で構成された第２光信号を送信する赤外線光信号送信装置であって、
第１偏光方向に偏光した前記第１光信号を送信する第１光信号送信部と、
前記第１偏光方向と交差する第２偏光方向に偏光した前記第２光信号を送信する第２光信号送信部とを備える
ことを特徴とする赤外線光信号送信装置。 An infrared optical signal transmission device for transmitting a first optical signal composed of infrared rays and a second optical signal composed of infrared rays,
A first optical signal transmitter for transmitting the first optical signal polarized in a first polarization direction;
An infrared optical signal transmission device comprising: a second optical signal transmission unit configured to transmit the second optical signal polarized in a second polarization direction that intersects the first polarization direction. 前記第１光信号送信部は、赤外線を発光する第１赤外発光ダイオードと、該第１赤外発光ダイオードが発光した赤外線を前記第１偏光方向に偏光して前記第１光信号を発生する第１送信用偏光板とを備え、
前記第２光信号送信部は、赤外線を発光する第２赤外発光ダイオードと、該第２赤外発光ダイオードが発光した赤外線を前記第２偏光方向に偏光して前記第２光信号を発生する第２送信用偏光板とを備える
ことを特徴とする請求項１に記載の赤外線光信号送信装置。 The first optical signal transmission unit generates a first optical signal by polarizing a first infrared light emitting diode that emits infrared light, and infrared light emitted from the first infrared light emitting diode in the first polarization direction. A first polarizing plate for transmission,
The second optical signal transmitter generates a second optical signal by polarizing a second infrared light emitting diode that emits infrared light and the infrared light emitted from the second infrared light emitting diode in the second polarization direction. The infrared light signal transmission device according to claim 1, further comprising a second transmission polarizing plate. 前記第１光信号送信部は、前記第１偏光方向に偏光した前記第１光信号を発光する第１レーザダイオードを備え、
前記第２光信号送信部は、前記第２偏光方向に偏光した前記第２光信号を発光する第２レーザダイオードを備える
ことを特徴とする請求項１に記載の赤外線光信号送信装置。 The first optical signal transmitter includes a first laser diode that emits the first optical signal polarized in the first polarization direction,
2. The infrared optical signal transmission device according to claim 1, wherein the second optical signal transmission unit includes a second laser diode that emits the second optical signal polarized in the second polarization direction. 3. 前記第１レーザダイオードおよび前記第２レーザダイオードは、アイセーフ型であることを特徴とする請求項３に記載の赤外線光信号送信装置。   4. The infrared optical signal transmission device according to claim 3, wherein the first laser diode and the second laser diode are eye-safe type. 前記第１偏光方向は垂直方向であり、前記第２偏光方向は水平方向であることを特徴とする請求項１ないし請求項４のいずれか一つに記載の赤外線光信号送信装置。   5. The infrared optical signal transmission device according to claim 1, wherein the first polarization direction is a vertical direction and the second polarization direction is a horizontal direction. 6. 赤外線で構成され第１偏光方向に偏光された第１光信号および赤外線で構成され前記第１偏光方向と交差する第２偏光方向に偏光された第２光信号を受信する赤外線光信号受信装置であって、
前記第１光信号を受信する第１光信号受信部と、前記第２光信号を受信する第２光信号受信部とを備える
ことを特徴とする赤外線光信号受信装置。 An infrared optical signal receiver configured to receive a first optical signal composed of infrared rays and polarized in a first polarization direction and a second optical signal composed of infrared rays and polarized in a second polarization direction intersecting the first polarization direction. There,
An infrared optical signal receiving apparatus comprising: a first optical signal receiving unit that receives the first optical signal; and a second optical signal receiving unit that receives the second optical signal. 前記第１光信号受信部は、前記第１光信号を通過させる第１受信用偏光板と、該第１受信用偏光板が通過させた前記第１光信号を受光する第１受光素子とを備え、
前記第２光信号受信部は、前記第２光信号を通過させる第２受信用偏光板と、該第２受信用偏光板が通過させた前記第２光信号を受光する第２受光素子とを備える
ことを特徴とする請求項６に記載の赤外線光信号受信装置。 The first optical signal receiving unit includes: a first receiving polarizing plate that allows the first optical signal to pass; and a first light receiving element that receives the first optical signal that the first receiving polarizing plate passes. Prepared,
The second optical signal receiving unit includes: a second receiving polarizing plate that allows the second optical signal to pass; and a second light receiving element that receives the second optical signal that has passed through the second receiving polarizing plate. The infrared optical signal receiving device according to claim 6, further comprising: 前記第１光信号受信部は、前記第１光信号を通過させる方向に回動し、前記第２光信号受信部は、前記第２光信号を通過させる方向に回動する構成としてあることを特徴とする請求項６または請求項７に記載の赤外線光信号受信装置。   The first optical signal receiving unit is configured to rotate in a direction for allowing the first optical signal to pass, and the second optical signal receiving unit is configured to be rotated in a direction for allowing the second optical signal to pass. The infrared optical signal receiver according to claim 6 or 7, characterized in that 前記第１偏光方向は垂直方向であり、前記第２偏光方向は水平方向であることを特徴とする請求項６ないし請求項８のいずれか一つに記載の赤外線光信号受信装置。   9. The infrared optical signal receiving apparatus according to claim 6, wherein the first polarization direction is a vertical direction, and the second polarization direction is a horizontal direction. 前記光信号受信装置は、携帯移動式音声発生装置であることを特徴とする請求項９に記載の赤外線光信号通信装置。   The infrared optical signal communication device according to claim 9, wherein the optical signal receiving device is a portable mobile sound generator. 赤外線光信号送信装置と赤外線光信号受信装置とを備える赤外線光信号通信装置であって、
前記赤外線光信号送信装置は、請求項１ないし請求項５のいずれか一つに記載の赤外線光信号送信装置であり、
前記赤外線光信号受信装置は、請求項６ないし請求項１０のいずれか一つに記載の赤外線光信号受信装置である
ことを特徴とする赤外線光信号通信装置。 An infrared optical signal communication device comprising an infrared optical signal transmitter and an infrared optical signal receiver,
The infrared optical signal transmitter is the infrared optical signal transmitter according to any one of claims 1 to 5,
The infrared optical signal communication device according to any one of claims 6 to 10, wherein the infrared optical signal reception device is an infrared optical signal communication device.
JP2006301798A 2006-11-07 2006-11-07 Infrared optical signal transmitter, infrared optical signal receiver and infrared optical signal communication equipment Pending JP2008118542A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010171759A (en) * 2009-01-23 2010-08-05 Rohm Co Ltd Infrared communication system
US8335430B2 (en) 2009-07-01 2012-12-18 Hokuyo Automatic Co., Ltd. Optical data transmission apparatus
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JP2018117348A (en) * 2011-08-26 2018-07-26 トリルミナ コーポレーション High speed free-space optical communications
US10244181B2 (en) 2009-02-17 2019-03-26 Trilumina Corp. Compact multi-zone infrared laser illuminator
US10615871B2 (en) 2009-02-17 2020-04-07 Trilumina Corp. High speed free-space optical communications
US11095365B2 (en) 2011-08-26 2021-08-17 Lumentum Operations Llc Wide-angle illuminator module

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JP2010171759A (en) * 2009-01-23 2010-08-05 Rohm Co Ltd Infrared communication system
US10244181B2 (en) 2009-02-17 2019-03-26 Trilumina Corp. Compact multi-zone infrared laser illuminator
US10615871B2 (en) 2009-02-17 2020-04-07 Trilumina Corp. High speed free-space optical communications
US10938476B2 (en) 2009-02-17 2021-03-02 Lumentum Operations Llc System for optical free-space transmission of a string of binary data
US11075695B2 (en) 2009-02-17 2021-07-27 Lumentum Operations Llc Eye-safe optical laser system
US11121770B2 (en) 2009-02-17 2021-09-14 Lumentum Operations Llc Optical laser device
US11405105B2 (en) 2009-02-17 2022-08-02 Lumentum Operations Llc System for optical free-space transmission of a string of binary data
US8335430B2 (en) 2009-07-01 2012-12-18 Hokuyo Automatic Co., Ltd. Optical data transmission apparatus
JP2018117348A (en) * 2011-08-26 2018-07-26 トリルミナ コーポレーション High speed free-space optical communications
US11095365B2 (en) 2011-08-26 2021-08-17 Lumentum Operations Llc Wide-angle illuminator module
US11451013B2 (en) 2011-08-26 2022-09-20 Lumentum Operations Llc Wide-angle illuminator module
JP2015049290A (en) * 2013-08-30 2015-03-16 旭化成イーマテリアルズ株式会社 Optical system

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