JPH10178393A - Light transmitter-receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-speed light transmitter-receiver capable of being economically miniaturized and reducing power consumption. SOLUTION: This light transmitter-receiver 100 on a host side is provided with a light transmission means where a light emitting element 108 for emitting optical signals provided with a narrow direction/light convergence property corresponding to transmission information is disposed, a light reception part 103 where a light receiving element for receiving the optical signals from the light transmitter-receiver 101 on a terminal side is disposed and a plate 102 for diffusing, converting and transmitting or reflecting the optical signals projected from the light transmission means. The prescribed position of the plate 102 is irradiated with the optical signals from the light emitting element 108, a secondary light source 106 is formed on the plate 102 viewing from the light transmitter-receiver 101 on the terminal side and light from the secondary light source 106 is transmitted to the light transmitter-receiver 101 on the terminal side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a system for transmitting information between optical devices such as an optical wireless LAN and an optical interconnection, for example, information devices such as personal computers distributed and arranged in an office space, using optical signals. The present invention relates to an optical transmitting and receiving apparatus for mutually transmitting and receiving optical signals.

[0002]

2. Description of the Related Art In recent years, with the spread of information equipment, the demand for a so-called indoor optical wireless LAN system for performing data transmission between a plurality of information equipment distributed in an office via optical communication has been increasing.

As an optical transmission / reception device used in the above system, for example, an “optical transmission / reception device” disclosed in JP-A-4-98914 is known. This is shown in FIG.
As shown in FIG. 21 and FIG. 21, a light transmitting unit 2002 provided with a light emitting element 2001, a light receiving unit 2004 provided with a light receiving element 2003, and a light transmitting unit 2002
And a light-shielding plate 2005 provided between the light-receiving unit 2004 and the light-receiving unit 2004 to reduce the size of the device itself and avoid signal interference between the light-sending portion and the light-receiving portion.

As another optical transmission / reception device, 1995
In the IEICE General Conference B-490. Here, as shown in FIG. 22, a transmitter 2201 for emitting a beam directed in the vertical direction and a plurality of peripheral directions is provided, and the receiver 2202 is directed in the vertical direction, and irradiates a wide range and reflects reflected light from a part. By receiving, an alignment-free configuration is realized.

Further, another optical transmission / reception apparatus is disclosed in
It is disclosed in US Pat. FIG. 23 shows the configuration of this device. The indoor optical space transmission apparatus 2300 in this publication includes a transmission system 2 having a digital modulation multiplexer 2302, a driving circuit 2303, and a light emitting element 2304.
301, a digital separation demodulator 2311, a light receiving circuit 2312, a light receiving element 2313, and a hemispherical lens 2314.
And a receiving system 2310 having the following.

In this device, the light of the light emitting element 2304 is modulated and emitted to the indoor space, and the light reflected by the indoor structure such as the ceiling 1 or the wall 2 is transmitted, and the light is transmitted to the light receiving element 2313.
The information is transmitted by receiving the light at the. Further, a configuration in which light emitted from the light emitting element 2304 is radiated through a scattering plate or the like is used to obtain safe emitted light for the eyes. Here, the inter-symbol interference due to the multi-path is reduced by the multi-level modulation demodulation method.

[0007]

In a conventional optical transmitting and receiving apparatus as shown in FIG. 20, a light shielding plate is provided between a light transmitting unit and a light receiving unit to directly receive its own signal. Although there is an advantage that the light emission can be avoided, a certain number or more light emitting elements are required to irradiate a predetermined range without deteriorating the transmission quality, which leads to an increase in cost and power consumption. There was a point.

Further, in the conventional optical transmitting / receiving apparatus as shown in FIG. 22, an alignment-free configuration is possible, but on the other hand, the impulse response is increased due to the multipath of the reflected light provided by a wide-range illumination system. There is a problem in that it is not possible to cope with high speed because the characteristics are deteriorated.

Further, in the apparatus shown in FIG. 23, an alignment-free configuration is possible. However, in order to increase the speed due to intersymbol interference due to the multipath of reflected light provided by a wide range of illumination systems, a complicated modulation / demodulation method is used, which leads to an increase in cost, and a reduction in device size and power consumption. Was hindered.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and has as its object to provide a high-speed optical transmission / reception apparatus that can be economically reduced in size, realizes low power consumption.

[0011]

In order to achieve the above object, an optical transmitting / receiving apparatus according to claim 1 comprises a host-side optical transmitting / receiving apparatus connected to a host computer or the like on a network; An optical transmission / reception device connected to one or more terminal-side optical transmission / reception devices, which transmits / receives the information using an optical signal to / from the information terminal equipment distributed / arranged in the host. The device comprises a light transmitting means provided with a light emitting element which emits an optical signal having a narrow directivity or a light condensing property corresponding to transmission information, and a light receiving element which receives an optical signal from the terminal side optical transceiver. And a light beam converting surface for diffusing and converting the light signal projected from the light transmitting device and transmitting or reflecting the light signal. The light signal is transmitted from the light emitting element to a predetermined position on the light beam converting surface. Teru And, viewed from the terminal-side optical transceiver on the light beam conversion surface to form a secondary light source is intended to send the light from the secondary light source to the terminal-side optical transceiver.

According to a second aspect of the present invention, there is provided an optical transmitting / receiving apparatus connected to a host-side optical transmitting / receiving apparatus connected to a host computer or the like on a network, and information terminal equipment distributed / arranged at an arbitrary position. An optical transmitter / receiver for transmitting / receiving information using one or more terminal-side optical transmitter / receivers using an optical signal, wherein the host-side optical transmitter / receiver has a diffuse reflection surface on a flat plate; A light beam conversion surface for diffusing and reflecting an optical signal, and a light receiving element provided on a substantially parallel plane spaced apart from the light beam conversion surface by a predetermined distance and receiving an optical signal from the terminal side optical transceiver are provided. And a plurality of light-receiving means arranged at substantially equal intervals on a substantially plane between the light-receiving means and the light beam conversion surface and corresponding to transmission information and having a narrow directivity or a light collecting property. Light emitting device And means, the projection light from the light emitting element, and constitutes to spot irradiation in the desired limited range of the light beam conversion surface.

In other words, according to the first or second aspect, when an optical signal having a narrow directivity or a condensing property is spot-irradiated on the light beam conversion surface, when the emitted light is viewed from the terminal-side optical transmitting / receiving apparatus, the secondary light is generated. The light source is simulatedly arranged on the light beam conversion surface, and an optical signal is emitted from the secondary light source so as to have a relatively gentle light amount distribution in a predetermined range. Regardless, it is possible to maintain a desired received light intensity.

According to a third aspect of the present invention, there is provided an optical transmission / reception device connected to a host-side optical transmission / reception device connected to a host computer or the like on a network, and to information terminal equipment distributed and arranged at an arbitrary position. , An optical transmission / reception apparatus for transmitting / receiving the information using an optical signal to / from one or more terminal-side optical transmission / reception apparatuses, wherein the host-side optical transmission / reception apparatus corresponds to the transmission information, and is narrowly directed or collected. A light transmitting means provided with a light emitting element for emitting an optical signal having optical properties, a light receiving means provided with a light receiving element for receiving an optical signal from the terminal side optical transmitting / receiving device, and a front surface of the light transmitting means And a light beam conversion surface for transmitting and diffusing an optical signal projected from the light transmitting means and transmitting the light signal to the terminal-side optical transmitting / receiving device.

That is, by providing a light beam converting surface for transmitting and diffusing an optical signal of the light transmitting means in front of the light transmitting means,
Further, miniaturization can be promoted.

According to a fourth aspect of the present invention, there is provided an optical transmission / reception device connected to a host-side optical transmission / reception device connected to a host computer or the like on a network and information terminal equipment dispersed / arranged at an arbitrary position. , An optical transceiver for transmitting and receiving information using an optical signal to and from one or more terminal-side optical transceivers, wherein the host-side optical transceiver is mounted on a support member having a predetermined height. A light-receiving element having a light-receiving element for receiving an optical signal from the terminal-side optical transmission / reception device at a substantially central portion thereof; and a narrow-directional or light-collecting optical signal corresponding to transmission information in a substantially vertical direction. A light-sending means in which light-emitting elements for irradiation are arranged at substantially equal intervals around the light-receiving means; and a plane separated by a predetermined distance from the light-sending means and within a limited range of the plane. From the light emitting element Is installed in a position to be irradiated with light, light signals projected from said light-sending means is irradiated spot,
A light beam conversion surface for transmitting the irradiation light to the terminal-side optical transceiver.

That is, for example, a light beam conversion surface provided at a predetermined distance such as an indoor ceiling is irradiated with an optical signal from a light transmitting / receiving device formed on a support member in a substantially vertically upward direction. The troublesome wiring work such as a LAN cable to the ceiling can be omitted, and an economical system is realized.

According to a fifth aspect of the present invention, the secondary light source on the light beam converting surface is formed by irradiating the plurality of light emitting elements.

That is, by arranging one irradiation spot on the light beam conversion surface such that a plurality of light emitting elements are paired to form a secondary light source, a secondary light source having a sufficient light amount can be obtained.

According to a sixth aspect of the present invention, in the optical transmitting / receiving apparatus, the light receiving means is constituted by a light receiving element in which a convex lens and a hemispherical lens are integrated so that the focal position of the convex lens is a light receiving surface. It is.

That is, by using the optical characteristics of the hemispherical lens to correct the deterioration of the viewing angle of the convex lens, it is possible to secure the light receiving intensity at a wide light receiving viewing angle.

Further, in the optical transmitting and receiving apparatus according to claim 7, the secondary light source of the light beam converting surface is disposed within a radius r,
Assuming that the speed of light in the air is C and the bit rate of the optical signal is B, the relationship of r ≦ C / 4B is satisfied.

That is, by satisfying the expression described in claim 7, it is possible to reduce interference between optical signals.

In the optical transmission / reception apparatus according to the eighth aspect, the host-side optical transmission / reception apparatus connected to a host computer or the like on a network and the information terminal equipment distributed and arranged at an arbitrary position are connected. , An optical transmission / reception apparatus for transmitting / receiving the information using an optical signal to / from one or more terminal-side optical transmission / reception apparatuses, wherein the host-side optical transmission / reception apparatus corresponds to the transmission information, and is narrowly directed or collected. A light transmitting means provided with a light emitting element for emitting an optical signal having optical properties, a light receiving means provided with a light receiving element for receiving an optical signal from the terminal side optical transmitting and receiving device, and a micro lens group. A light beam diffusing means for converting the optical signal from the light transmitting means into a wavefront using a lens array and projecting the light signal to the terminal-side optical transmitting / receiving apparatus.

That is, when the optical transmitter / receiver on the host side transmits an optical signal to the optical transmitter / receiver on the terminal side, the optical signal from the light transmitting means is wavefront-converted and projected by the light beam diffusing means, whereby the optical signal is diffused. Therefore, it is possible to irradiate light uniformly over a wide range.

In the optical transmitting and receiving apparatus according to the ninth aspect, the light beam diffusing means has a focal length set to be longer toward the outside of a lens near the optical axis of the light emitting element of the light transmitting means. It is composed of a lens array.

That is, for the light emitting element, excessive diffusion of the signal light by the outer lens is suppressed, and the amount of irradiation within a predetermined range is increased, so that the amount of light received by the optical transmitter / receiver at the terminal side is secured. .

In the optical transmitting and receiving apparatus according to the tenth aspect, the light beam diffusing means includes a lens array member formed on the same substrate and a surface shape processing of the substrate or a predetermined refractive index inside the substrate. A lens array substrate formed with a distribution is used.

That is, by using a lens array substrate in which the lens array member is formed on the same substrate and the surface of the substrate is processed or a predetermined refractive index distribution is formed inside the substrate, a lens having excellent productivity is obtained. An array can be obtained economically.

Further, in the optical transmitting and receiving apparatus according to the eleventh aspect, the light beam diffusing means is such that a substrate forming a lens array is constituted by a reflective lens array made of a material having high thermal conductivity, and The means drives the light emitting element of the light transmitting means and makes all / a part thereof contact a signal processing circuit component for processing a light receiving signal of the light receiving means.

That is, the lens array is of a reflective type made of a material having high thermal conductivity, and is attached to the signal processing circuit component in whole or in part so that the heat generated by the signal processing circuit component is positively increased. Heat can be dissipated.

In a twelfth aspect of the present invention, the light beam diffusing means integrally forms a condensing lens for condensing light received by the light receiving means.

That is, by integrating the condenser lens for receiving the optical signal transmitted from the terminal-side optical transmitting and receiving device with the lens array for light diffusion, it is not necessary to provide a separate condenser lens.

According to a thirteenth aspect of the present invention, the light beam diffusing means includes a lens group forming a lens array and a light scattering means for scattering light to portions other than the lens group. Is what it is.

That is, by providing a means for scattering the projection light from the light emitting element in the area between the lens groups of the lens array, for example, by forming fine irregularities on the surface, the diffusion effect of the lens group can be obtained. It becomes possible to scatter the projection light transmitted through other than the group.

Further, in the optical transmitting and receiving apparatus according to the fourteenth aspect, the light beam diffusing means makes the optical axis of the light emitting element of the light transmitting means and the corresponding lens substantially coincide with each other, and has a curved surface having a predetermined curvature. They are arranged in a shape.

That is, by forming a curved lens array by making the optical axes of the light emitting element and the corresponding lens substantially coincide with each other, the distance from the optical axis of the light emitting element is larger than that of the flat lens array. It is possible to secure the amount of incident light.

In the optical transmission / reception device according to claim 15, the terminal-side optical transmission / reception device includes at least the light transmitting means and the light receiving means arranged in the same housing, and The optical axis of the light receiving means is movable and adjusted to a position where transmission and reception can be performed with respect to the host-side optical transceiver.

That is, by adopting a structure in which the optical transmission / reception device on the terminal side is movable and adjusted with respect to the optical transmission / reception device on the host side, the optical transmission / reception device on the host side can be easily adjusted to a position having the highest optical transmission / reception efficiency. It becomes possible.

In the optical transmission / reception device according to the present invention, the housing is movable with respect to the host-side optical transmission / reception device, and irradiates and selects an optical signal for optical axis adjustment. And a display means for receiving the optical axis adjustment optical signal and displaying the light intensity.

That is, in addition to the above-mentioned claim 15, by using an optical signal for optical axis adjustment and knowing the intensity of the optical signal, an accurate optical axis adjustment operation can be performed.

In the optical transmitting and receiving apparatus according to the seventeenth aspect, a plurality of light emitting elements having different wavelengths and a plurality of light receiving elements corresponding to the wavelengths of the light emitting elements are used.

That is, since optical communication using light emitting elements and light receiving elements of different wavelengths is realized, it is possible to multiplex communication and increase communication capacity.

[0044]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an optical transmitting / receiving apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

[Embodiment 1] FIG. 1 is an explanatory diagram showing a configuration of an optical transmitting and receiving apparatus according to Embodiment 1 and an example of a system using the apparatus. FIG. 2 is an explanatory diagram showing a detailed configuration of the optical transmitting and receiving apparatus. 1A is an external view, and FIG. 1B is a sectional configuration diagram. FIG. 3 is an explanatory diagram showing a detailed configuration of the transmission / reception device.

In FIG. 1, reference numeral 100 denotes a HUB, for example.
LAN node (node) (such as a concentrator required when using 10BASE-T with a cable for constructing a LAN)
e), the host-side optical transceivers 101a and 101b arranged on the ceiling of an office or the like are connected to a terminal device such as a personal computer or a portable terminal device;
This is a terminal-side optical transmission / reception device arranged on a desk or the like. In this embodiment, two terminal-side optical transmitting / receiving devices are shown. However, it is needless to say that a single or three or more optical transmitting / receiving devices may be used. In the description, if there is no problem, even if there is a plurality, it is described as the terminal-side optical transmitting / receiving apparatus 101.

Terminal side optical transmitting / receiving apparatuses 101a and 101
b denotes a transmitting section comprising a light emitting element and its driving circuit, a visible light cut filter, a light receiving section comprising an optical system having a wide viewing angle and a large amount of received light, and an optical transmitting / receiving section 110 comprising a signal processing circuit thereof; And an interface circuit 111 for mediating communication with the device.

The host-side optical transmission / reception device 100 is provided at a predetermined distance from a flat plate 102 having a diffuse reflection surface, that is, a reflection plate (light conversion surface) having fine irregularities randomly formed on the surface. A light receiving unit 103 as a light receiving means, comprising a light receiving element, a lens (here, a hemispherical lens closely attached to the light receiving element surface) and a filter for blocking visible light, A light receiving unit 105 (see FIG. 2) fixed to the member 104 and formed of a signal processing circuit board for processing a received signal and transmitting information to a subsequent stage, and a supporting member between the light receiving unit 105 and the flat plate 102 A light-emitting element (including a lens system) 10 is fixed on the circumference of a circle substantially parallel to a plane fixed by the light-receiving unit 105 and arranged at substantially equal intervals to the light-receiving unit 105.
8, a light transmitting unit 107 as light transmitting means mounted together with a circuit for modulating or encoding a signal from the LAN node suitable for optical space transmission and driving the light emitting element 108;
It is composed of

The flat plate 102 is arranged and configured so that the secondary light source 106 is formed. Further, a transparent dust cover 109 for preventing and protecting them from dust is provided as an outer member.

In the above configuration, in the optical system, the light emitting element 108 is driven based on the signal from the LAN node to emit an optical signal, and this optical signal is once applied to the diffuse reflection surface of the flat plate 102. At this time, the projection light from each light emitting element 108 on the light transmission unit 107 has narrow directivity or light condensing property by a lens system, and is spot-irradiated on substantially the same circumference on the reflection surface.

Therefore, when viewed from the terminal side optical transmitting and receiving apparatuses 101a and 101b that receive the optical signal, the same effect as when the secondary light source 106 is arranged on the reflective surface is produced. That is, the signal light is emitted from the secondary light source 106 so as to have a comparatively gentle light amount distribution in a predetermined range.
It is possible to maintain a desired reception intensity regardless of the positions of 1a and 101b.

Further, as shown in FIG. 3, the light transmitting / receiving section 110 modulates or encodes a signal from a terminal device into a light emitting device 301 composed of a light emitting device and an optical system and modulates or encodes a signal suitable for optical space transmission. Drive circuit 3 for driving
02, a convex lens 303, and a hemispherical lens 304 arranged such that the light receiving surface is located at the focal position thereof.
And a signal processing circuit 30 for processing the received signal and transmitting information to the interface circuit 111 at the subsequent stage.
6 and an optical receiving unit.

It is to be noted that the above-mentioned light receiving optical system can be constituted only by a hemispherical lens. Although this is an optical system that ensures a sufficiently wide field of view, on the other hand, the amount of received light can be increased only in proportion to the square of the refractive index of the lens, and the optical signal from the host-side optical transmitting / receiving device 100 In the case of weakness, a sufficient amount of received light cannot be secured.

In the above description, it is possible to use only a convex lens. However, the amount of received light can be increased in proportion to the area of the lens, but the viewing angle becomes narrow in inverse proportion to the focal length.

Therefore, the optical system of this embodiment is configured to correct the deterioration of the viewing angle of the convex lens 303 by the effect of the hemispherical lens 304.

The optical transceiver 110 may be fixed in the vertical direction when the host optical transmitter / receiver 100 is within the field of view of the light receiving unit.
A movable mechanism may be provided so that the optical transmission / reception unit faces the host-side optical transmission / reception device 100 in order to more freely arrange a and 101b. This movable mechanism may be either electric or manual. In addition, even if there is some direction deviation within the field of view of the light receiving section, sufficient adjustment of the received light can be ensured, and adjustment by visual measurement is also sufficient. is there.

Further, a selection mechanism using a switch is provided in each of the terminal side optical transmitting and receiving apparatuses 101a and 101b, thereby irradiating an optical signal for optical axis adjustment, and detecting the intensity of the optical signal on the host side optical transmitting and receiving apparatus 100 side. The terminal transmits and receives an optical signal corresponding to the received light intensity,
And 101b, a plurality of LED lighting light sources are provided at predetermined locations of the host side optical transceiver 100, for example, a display means for receiving the optical signal and displaying information according to the signal.
For example, intensity information may be displayed according to the number of lit LEDs, and adjustment may be facilitated.

[Embodiment 2] Here, an example will be described in which light from a plurality of light emitting elements is irradiated to one irradiation spot to increase the light amount.

FIGS. 4A and 4B are explanatory diagrams showing the arrangement and configuration of the light emitting device according to the second embodiment. FIG. 4A shows a case where light from one light emitting device is irradiated on one irradiation spot, and FIG.
Indicates a case where light from a plurality of light emitting elements is irradiated on one irradiation spot.

That is, as shown in FIG. 4, the configuration of each light emitting element 108 of the light transmitting unit 107 in the host side optical transmitting and receiving apparatus 100 is changed to a secondary light source 401 which is one irradiation spot on the light flux conversion surface of the flat plate 102. In contrast, a plurality of light emitting elements (here, light emitting elements 108a and 108b) are paired to form the secondary light source 401a. This makes it possible to form the secondary light source 401a having a sufficient light amount.

[Embodiment 3] FIG. 5 is an explanatory diagram showing a configuration of an optical transmitting and receiving apparatus according to Embodiment 3. As shown in FIG. 5, the host-side optical transmission / reception device 500 is fixed on a support member 501 having a predetermined height, and the light receiving unit 103 is disposed substantially at the center of the upper surface of the support member 501. The light emitting elements 108 are arranged at substantially equal intervals on the same circumference of the light receiving section 103.

Further, a flat plate 102 having a light beam conversion surface or an exterior material having a diffuse reflection property is provided as a light beam conversion surface at the irradiation position on the ceiling surface. Then, the projection light is spot-irradiated on substantially the same circumference on the light beam conversion surface provided at a predetermined distance of the host-side optical transceiver 500.

In the above-described configuration, the projection light from the light emitting element 108 is applied with a narrow directivity or a condensing property by an optical system, and is irradiated substantially vertically upward. At this time, since the flat plate 102 having the light flux conversion surface or the exterior material having diffuse reflection is provided at the irradiation position on the ceiling surface, the irradiation light is spot-irradiated. As a result, construction work for laying wiring on the ceiling becomes unnecessary, and an economically advantageous system can be constructed.

[Embodiment 4] FIG. 6 is an explanatory diagram showing a configuration of an optical transmitting and receiving apparatus according to Embodiment 4. As shown in FIG. 6, in the host-side optical transmission / reception device 600, a light beam conversion surface 601 for diffusing transmitted light is arranged on the front surface of the light emitting element.

Alternatively, as shown in (b), a dust cover 602 for preventing dust intrusion is provided in the light transmitting / receiving device 600 in place of the light beam converting surface 601, and the dust cover 602 is randomly arranged on the front surface or the back surface. It shall have minute unevenness and be provided with a light flux conversion function.

That is, in the above configuration, each light emitting element 10 on the light transmitting unit having a narrow directivity or a light collecting property
The projection light from 8 is spot-irradiated with the projection light on the light flux conversion surface.

[Embodiment 5] By the way, when the above-mentioned secondary light source for diffusion 106 is arranged, in consideration of intersymbol interference, it is necessary to set the secondary light source 106 within a certain range in order to reduce the load on the signal processing circuit. Is desirable. This will be described below with reference to FIGS.

FIG. 8 is a block diagram showing a configuration of a receiving circuit according to the fifth embodiment. An amplifier 801 for amplifying a received optical signal, a band-pass filter 802, and the output of the band-pass filter 802 are determined. Judge 80 to process
And 3.

In consideration of the symmetry in FIG. 7, when the secondary light source is arranged on a substantially circumference of radius r, the maximum optical path difference is given to the secondary light sources 106 viewed from the terminal side optical transmitting / receiving apparatus 101. Is the secondary light source 10a located symmetrically with respect to the secondary light source 106a near the terminal-side optical transceiver 101.
6b.

Assuming that the above optical path difference is ΔI, ΔI = 2 rs
It is represented by inα. Further, assuming that the speed of light is C, the lighting of the secondary light source 106 is performed at substantially the same time in consideration of the fact that the distance to the light emitting element 108 is shorter than the distance between the host-side optical transceiver 100 and the terminal-side transceiver 101. There is no practical problem. Therefore, the delay time Δt of the optical signal is given by ΔI / C.

Here, On-Off-Keying, which is a modulation method that places the least burden on the light emitting element at the modulation speed, is used.
(OOK) is considered to be received by the receiving circuit shown in FIG. If the transmission rate of the signal is B and the decision unit 803 samples at the center of the clock of the signal, the bit signal before the sampling point does not interfere. It is desirable that the relationship be 2B.

That is, the actual host-side optical transmitting / receiving apparatus 1
From the arrangement relationship between 00 (or 500, 600) and the terminal-side optical transmitting / receiving apparatus 101, the radius r is given by r ≦ C / 4B (1) from sinα ≒ 1. .

Although the upper limit of r is actually different depending on the signal distortion, modulation and coding method, at least when the signal is arranged wider than the above limit, intersymbol interference occurs. In this case, which may affect the cost and transmission quality of the device.

The embodiments for realizing the present invention have been described above. However, the present invention is not limited to these embodiments without departing from the gist of the present invention, and various other forms can be considered. For example, in FIG. 1, the spot diameter may be adjusted and the exterior member of the room ceiling where the light flux conversion surface is arranged may be used as it is.

In each of the above-described devices, a plurality of light emitting elements having different center emission wavelengths, a band-pass filter transparent to each wavelength and a light receiving section may be prepared, and wavelength multiplexing may be performed.

Further, by miniaturizing the terminal side transmitting / receiving apparatus 101 and adding an interface function with a PCMCIA card to an interface circuit portion,
It can also be installed directly in a card slot of a portable information device.

[Embodiment 6] According to the invention described in the above embodiment, the light of the light emitting element is once diffused through the diffuse reflection surface and sent to the terminal side transmitting / receiving apparatus. Reception area can be secured. However, on the other hand, when optical communication is performed using diffused light, the average reception level may decrease. For this reason, in the following embodiments, a wide irradiation range is realized using diffused light,
An example in which a certain transmission quality is ensured will be described.

(Structure of Embodiment 6) FIG. 9 is an explanatory diagram showing the structure of an optical transmitting / receiving apparatus according to Embodiment 6 and an example of a system using the apparatus. In the sixth embodiment (FIG. 9), the configuration of the host-side optical transmitting and receiving device provided on the ceiling side is different from the configuration of FIG. 1 described above, and the other configurations are basically the same.

That is, it is connected to a LAN node (A) such as a HUB, and is connected to a host side optical transmitting / receiving device 900 arranged on the ceiling of a room and a terminal device (B) such as a personal computer (PC) or a portable information terminal. And one or more terminal-side optical transceivers 910 arranged on a desk or the like.

The host-side optical transmission / reception device 900 is provided with a lens array 901 as a light-emitting unit, which is a light-diffusion unit composed of a plurality of microlens groups in which light from light-emitting elements is arranged in a predetermined positional relationship. The light receiving unit 902 for receiving the optical signal from the light emitting device 910 is provided substantially at the center. Also, the terminal-side optical transceiver 9
Reference numeral 10 denotes an optical transmission / reception unit 91 that receives an optical signal with respect to the host-side optical transmission / reception device 900 or transmits an optical signal to the device.
1 and an interface circuit 912 having a circuit for performing signal processing and the like.

Further, the configuration will be described in detail. FIG.
FIG. 10 is an explanatory diagram showing a cross section of the configuration of the host-side optical transceiver 900 in FIG. 9. Host-side optical transceiver 900
Is a light emitting element 1001 including a lens system arranged at equal intervals on a substantially parallel circumference, and a signal from the preceding stage (A) modulated or encoded suitable for optical space transmission.
And a circuit for driving the signal, and processing the received signal to form a first stage (A)
And a circuit board 1002 on which a signal processing circuit for transmitting information to is mounted. Also, the lens array 90
As shown in FIG. 10, a convex lens 1 is formed by filling a convex lens (microlens) in a substantially same plane in a close-packed manner.

The light receiving section 902 is provided on the circuit board 1002
A light receiving element 1003 and a light receiving element 1003
3 is provided with a hemispherical lens 1004 provided at the tip and a filter 1005 for blocking visible light.

The light transmitting / receiving section 911 (receiving section and light emitting section) of the terminal side optical transmitting / receiving apparatus 910 is a filter for blocking unnecessary visible light on the surface of a light receiving element such as a photodiode having a wide field of view having a pin structure. And a hemispherical lens is brought into close contact therewith. In consideration of miniaturization and low power consumption, an LED with a lens having a relatively narrow directivity is provided in a housing (optical transmission / reception unit 911) integrated with the light receiving portion.
It is possible to adopt a configuration in which one or a plurality of elements or the like are arranged, and these elements are opposed to the host-side optical transmitting / receiving apparatus 900 arranged on the ceiling for communication.

(Operation of Embodiment 6) Next, the operation of the optical transmission / reception apparatus configured as described above will be described. FIG. 11 is an explanatory diagram showing a light emitting / receiving state according to the sixth embodiment. The host-side optical transmitting / receiving device 900 transmits the light emitting element 1 based on a signal from a LAN node (A) such as a HUB.
001 is driven. Light emitted from the light emitting element 1001 is applied to the lens array 901, where the light is converted into a wavefront and emitted to space. In other words, the irradiation light of the light emitting element 1001 is the N light of each lens constituting the lens array 901.
The conversion is performed according to the radiation angle based on A (numerical aperture), and the converted light is projected on the terminal-side optical transceiver 910 connected to the terminal device (B).

FIG. 12 schematically shows the state of the receiving range and the light intensity at this time. As shown in FIG. 12, although the peak power is reduced by irradiating light through the lens array 901, the light amount distribution 1202 in the case where the light is directly radiated without using the lens array 901 is wider and more uniform. A light amount distribution 1201 is obtained,
It is possible to secure a certain transmission quality. Further, the shorter the focal length of the lens used for the lens array 901 is about the lens radius, the wider the irradiation range can be obtained.

Further, the hemispherical lens is connected to the receiving unit and the light emitting unit of the terminal side optical transmitting / receiving device 910 via a filter for blocking unnecessary visible light on the surface of a light receiving element such as a photodiode having a pin structure having a wide field of view. The close contact configuration eliminates the need for optical axis alignment and enables communication at an arbitrary position.

[Seventh Embodiment] FIG. 13 shows a seventh embodiment.
FIG. 2 is an explanatory diagram showing a configuration of an optical transceiver according to the first embodiment. In the seventh embodiment, the configuration of the lens array 901 is set so that the focal length increases (longens) within a predetermined range as the distance from the lens 901a near the optical axis of the light emitting element 1001 increases.

As described above, by making the focal length longer toward the outside with respect to the lens 901a near the light emitting element 1001, the irradiation range becomes narrower with respect to the above-described sixth embodiment, but the predetermined range becomes smaller. Excessive diffusion of the signal light on the outside can be suppressed, and the irradiation light amount on the outside can be secured.

That is, the effect of diffusing the signal light by the outer lens with respect to the light emitting element 1001 can be reduced, and the irradiation light amount within a predetermined range can be increased. Therefore, the terminal-side optical transmitting and receiving device 9
10, the amount of received light increases, and a higher-speed transmission system is realized.

The lens array 901 is made of, for example, the same resin substrate as the lens array member, and the surface of the substrate is spherically processed using an injection molding technique or the like, or a monomer for increasing the refractive index is selectively used. It is produced by thermal diffusion. As a result, an economical and highly productive device is realized.

[Eighth Embodiment] FIG. 14 shows an eighth embodiment.
FIG. 2 is an explanatory diagram showing a configuration of an optical transceiver according to the first embodiment. In the eighth embodiment, a concave lens array 1401 having a minute reflecting surface as shown in FIG.
Is provided on the circuit board 1002 side in a state facing the terminal side optical transceiver 910 side. Further, the light emitting element 1001 is configured to emit light toward the concave curved plate 1401.

As the concave lens array 1401, a concave lens array is formed on the surface of a member having high thermal conductivity, for example, a metal substrate such as aluminum. If necessary, mirror processing or thin film formation for improving the reflectance may be performed inside the concave shape. Then, the concave lens array 1401 thus formed is connected to the light emitting element 1001.
Are mounted in contact with some or all of the electronic circuit components for driving and the signal processing circuit components for processing the received light signal. By bringing the concave lens array 1401 formed of a material having high thermal conductivity into contact with the circuit board 1002, not only the speed of optical communication is increased due to the light diffusion effect described above, but also the electronic components of the circuit board 1002 can be used. The generated heat can be radiated positively. Therefore, the reliability of the circuit is also improved.

[Embodiment 9] FIG. 15 shows a ninth embodiment.
FIG. 2 is an explanatory diagram showing a configuration of an optical transceiver according to the first embodiment. In the ninth embodiment, an example is described in which the function of the above-described hemispherical lens 1004 (see FIG. 10) for condensing the received light is provided on the lens array side. In other words, as shown in FIG.
A lens array 501 and a hemispherical lens are integrally formed.

As described above, by adding the function of a condensing hemispherical lens to the lens array 1505, it is not necessary to separately provide a hemispherical lens, and the number of components can be reduced.

[Embodiment 10] FIG. 16 is an explanatory view showing the structure of a lens array according to Embodiment 10. In this lens array 901, as shown in FIG. 16, fine irregularities 1601 as light diffusion means are added to the substrate surface other than the lens 1602 by polishing or the like. Accordingly, the scattering effect of the minute uneven portion 1601 can be obtained at the same time as the light diffusion effect of the lens 1602. Therefore, the host-side optical transmission / reception device 900 can irradiate the terminal-side optical transmission / reception device 910 with light having a more uniform irradiation distribution, and the light use efficiency is improved.

[Embodiment 11] FIGS. 17 and 19
FIG. 27 is an explanatory diagram showing a configuration of an optical transceiver according to Embodiment 11 and a lens array portion thereof. In the eleventh embodiment, as shown in FIGS. 17 and 19, a lens array 1701 is formed and arranged on a spherical surface having a predetermined curvature so that the lens optical axis passes substantially at the center of the spherical surface. Further, the light emitting element 1001 is located at a substantially central portion of the spherical surface, and is set in a direction coinciding with a substantially optical axis direction of a predetermined lens of the lens array 1701.

With this configuration, for example, as shown in FIG. 18, the lens 180 away from the optical axis of the light emitting element 1001
Since the two optical axes substantially coincide with each other in the optical axis direction, it is possible to improve the incident light amount loss due to oblique incidence as compared with the flat lens 1801.

At this time, the terminal side optical transmitting / receiving device 91
The light receiving unit 0 and the optical transmitting unit 901 are accommodated in the housing of the optical transmitting and receiving unit 911, and the housing portion has a movable structure. Then, this is substantially opposed to the host-side optical transceiver 900. As a result, the optical axis is optimized, so that the amount of received light can be further improved.

Further, the terminal-side optical transceiver 910 irradiates signal light for optical axis adjustment by selection by a switch (not shown), and the other host-side optical transceiver 900 detects and compares the intensity of the signal light. , And irradiates the terminal side optical transmitting / receiving device 910 with signal light corresponding to the received light intensity.
The irradiated signal light is received by the terminal side optical transmission / reception device 910, and a means is provided for blinking a plurality of LED display lights emitting in different colors, for example, in accordance with the received light signal. By notifying the result of the success or failure, the optical axis can be easily adjusted.

Further, the optical transmitting / receiving apparatus according to the present invention can increase the communication capacity by multiplexing wavelengths. To realize this, for example, a light emitting unit (light transmitting unit)
The light emitting element 1001 is composed of a plurality of light emitting elements that emit light at different wavelengths, and a plurality of light receiving elements are used in the light receiving unit. At this time, a configuration may be adopted in which a bandpass filter that transmits only the corresponding wavelength, for example, a multilayer thin film is provided as the filter 1005 of each corresponding light receiving element.

Although the embodiments for realizing the present invention have been described above, it is needless to say that the present invention is not limited to the embodiments and various configurations can be made without departing from the gist of the present invention. Absent. For example, the lens array is not particularly limited to resin molding, and a similar configuration can be adopted even if an existing optical glass is used. In addition, a dust cover for transmitting signal light is provided on the front of the optical transceiver.
A structure that avoids dirt on the surface of the lens array due to dust may be used. Furthermore, the terminal-side optical transceiver is downsized, and PCMCIA is added to the interface circuit.
A function for interfacing with a card can be added, and the card can be directly installed in a card slot of a portable information terminal device.

[0102]

As described above, according to the optical transmitting and receiving apparatus according to the present invention (claims 1 and 2), when an optical signal having a narrow directivity or a condensing property is spot-irradiated on the light-flux conversion surface, this irradiation is performed. When the emitted light is viewed from the terminal-side optical transmitting and receiving device, a secondary light source is pseudo-disposed on the light-flux conversion surface, and an optical signal is emitted from the secondary light source so as to have a comparatively gentle light amount distribution in a predetermined range. Therefore, within the above range, it is possible to maintain a desired received light intensity regardless of the position of another optical transmitting / receiving device. Therefore, since each element and the like are minimized and the arrangement is efficient, it is possible to economically reduce the size, and realize low power consumption and light flux.

According to the optical transmission / reception device of the present invention (claim 3), a light beam conversion surface for transmitting and diffusing an optical signal of the light transmission means is provided on the front surface of the light transmission means, thereby further promoting miniaturization. Becomes possible.

According to the optical transmission / reception device of the present invention (claim 4), the optical transmission / reception device configured on the support member with respect to the light flux conversion surface provided at a predetermined distance such as the indoor ceiling, for example. Since the optical signal is irradiated substantially vertically upward from above, troublesome wiring work such as a LAN cable to the ceiling can be omitted, and an economical system is realized.

Further, according to the optical transmitting / receiving apparatus of the present invention (claim 5), one irradiation spot on the light flux conversion surface is configured such that a plurality of light emitting elements are paired to form a secondary light source. As a result, a secondary light source having a sufficient light amount can be obtained by effectively using the light emitting element.

Further, according to the optical transmission / reception device of the present invention (claim 6), the light receiving intensity at a wide light receiving viewing angle is reduced in order to correct the deterioration of the viewing angle of the convex lens by utilizing the optical characteristics of the hemispherical lens. Space can be secured.

Further, according to the optical transmission / reception apparatus of the present invention (claim 7), by satisfying the expression of claim 6, interference between optical signals can be reduced.

According to the optical transmission / reception device of the present invention (claim 8), when the host-side optical transmission / reception device sends an optical signal to the terminal-side optical transmission / reception device, the light from the light transmission unit is transmitted by the light beam diffusion unit. Since the optical signal is diffused by projecting the signal after wavefront conversion, it is possible to perform uniform and wide-area light irradiation.

According to the optical transmission / reception device of the present invention (claim 9), excessive diffusion of the signal light by the outer lens with respect to the light emitting element is suppressed, and the irradiation light amount within a predetermined range is increased. Therefore, the amount of received light on the terminal-side optical transmitting and receiving device side can be secured.

Further, according to the optical transmitting / receiving device of the present invention, the lens array member is formed on the same substrate, and the surface shape of the substrate is processed or a predetermined refractive index distribution is formed inside the substrate. Since a lens array substrate is used, a lens array having excellent productivity can be obtained economically.

According to the optical transmission / reception device of the present invention, the lens array is of a reflection type made of a material having a high thermal conductivity, and this is entirely or partially in contact with the signal processing circuit component. Because of the mounting, the heat generated by the signal processing circuit components can be actively radiated.

According to the optical transceiver of the present invention, the condenser lens for receiving the optical signal sent from the terminal optical transceiver is integrated with the lens array for light diffusion. Therefore, there is no need to separately provide a condenser lens, and the economic efficiency is improved.

Further, according to the optical transmitting / receiving apparatus of the present invention, the area between the lens groups of the lens array is scattered by the means for scattering the light projected from the light emitting element, for example, the fine irregularities are formed on the surface. Since it is formed and provided, in addition to the diffusion effect of the lens group, it is possible to scatter the projection light transmitted through other than the lens group.

Further, according to the optical transmitting / receiving apparatus of the present invention (claim 14), since the optical axes of the light emitting element and the corresponding lens are substantially coincident to form the curved lens array,
Compared to a flat lens array, the amount of incident light at a position distant from the optical axis of the light emitting element can be secured.

According to the optical transmission / reception device of the present invention (claim 15), the terminal-side optical transmission / reception device itself is configured to be movable and adjusted with respect to the host-side optical transmission / reception device side. On the other hand, it can be easily adjusted to the position where the optical transmission and reception efficiency is the best.

According to the optical transmission / reception apparatus of the present invention (claim 16), in addition to the above-described effects, the intensity of the optical signal can be known by using the optical axis adjustment optical signal, so that the optical axis adjustment can be accurately performed. , And can be performed easily, and workability such as installation work is improved.

Further, according to the optical transmission / reception device of the present invention (claim 17), since optical communication using light emitting elements and light receiving elements of different wavelengths is realized, multiplexing of communication and increase in communication capacity are achieved. Can be achieved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of an optical transmitting and receiving device according to a first embodiment and an example of a system using the device.

FIGS. 2A and 2B are explanatory diagrams showing a detailed configuration of the optical transmitting / receiving device in FIG. 1, wherein FIG. 2A is an external view and FIG.

FIG. 3 is an explanatory diagram illustrating a detailed configuration of a transmission / reception device in FIG. 1;

FIGS. 4A and 4B are explanatory diagrams showing an arrangement and a configuration of a light emitting element according to Embodiment 2; FIG.
In the case of irradiating one irradiation spot, (b) is a case of irradiating light from a plurality of light emitting elements to one irradiation spot.

FIG. 5 is an explanatory diagram showing a configuration of an optical transceiver according to a third embodiment.

FIG. 6 is an explanatory diagram showing a configuration of an optical transceiver according to a fourth embodiment.

FIG. 7 is an explanatory diagram showing an arrangement relationship of an optical transceiver according to a fifth embodiment.

FIG. 8 is a block diagram showing a configuration of a receiving circuit according to a fifth embodiment.

FIG. 9 is an explanatory diagram showing a configuration of an optical transmission / reception device according to a sixth embodiment and an example of a system using the device.

FIG. 10 is an explanatory diagram showing a cross section of the configuration of the host-side optical transmitting / receiving device in FIG. 9;

FIG. 11 is an explanatory diagram showing a light emitting / receiving state according to the sixth embodiment.

FIG. 12 is an explanatory diagram showing a light quantity distribution and a light intensity according to the sixth embodiment.

FIG. 13 is an explanatory diagram illustrating a configuration of an optical transceiver according to a seventh embodiment.

FIG. 14 is an explanatory diagram showing a configuration of an optical transceiver according to an eighth embodiment.

FIG. 15 is an explanatory diagram showing a configuration of an optical transceiver according to a ninth embodiment.

FIG. 16 is an explanatory diagram showing a configuration of a lens array according to a tenth embodiment.

FIG. 17 is an explanatory diagram showing a configuration of a lens array part of the optical transceiver according to the eleventh embodiment.

FIG. 18 is an explanatory diagram showing a light irradiation state of the optical transceiver according to the eleventh embodiment.

FIG. 19 is an explanatory diagram illustrating a configuration of an optical transceiver according to an eleventh embodiment.

FIG. 20 is an explanatory diagram showing a configuration example (1) of a conventional optical transmission / reception device.

21 is a plan view showing the configuration of the light transmitting unit in FIG.

FIG. 22 is an explanatory diagram showing a configuration example (2) of a conventional optical transmission / reception device.

FIG. 23 is an explanatory diagram showing a configuration example (3) of a conventional optical transmission / reception device.

[Explanation of symbols]

 100, 500, 600 Host-side optical transceiver 101, 910 Terminal-side optical transceiver 102 Flat plate 103 Light receiving unit 105 Light receiving unit 106 Secondary light source 107 Light transmitting unit 108, 301, 1001 Light emitting element 303 Convex lens 304, 1004 Hemisphere lens 401a Two Next light source 501 Support member 601 Light flux conversion surface 901, 1401, 1501, 1701 Lens array 1601 Micro unevenness

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI H01L 33/00 H04B 10/28 10/26 10/14 10/04 10/06

Claims (17)

[Claims] An optical transmission / reception device connected to a host computer connected to a host computer or the like on a network and one or more terminal optical transmission / reception devices connected to an information terminal device distributed and arranged at an arbitrary position. In an optical transmitting and receiving apparatus for transmitting and receiving the transmission of information using an optical signal, the host-side optical transmitting and receiving apparatus is provided with a light emitting element which emits an optical signal having a narrow directivity or a condensing property corresponding to the transmission information. Light transmitting means, a light receiving element provided with a light receiving element for receiving an optical signal from the terminal side optical transmitting / receiving device, and a light signal projected from the light transmitting means, which is diffused / converted and transmitted or reflected. A light beam is emitted from the light emitting element to a predetermined position of the light beam converting surface, and a secondary light source is formed on the light beam converting surface as viewed from the terminal side optical transceiver. Secondary light source An optical transmission / reception device for transmitting light from the terminal to the terminal-side optical transmission / reception device. 2. A connection between a host-side optical transmission / reception device connected to a host computer or the like on a network and one or more terminal-side optical transmission / reception devices connected to information terminal equipment or the like distributed and arranged at an arbitrary position. In an optical transmitting and receiving apparatus for transmitting and receiving the information using an optical signal, the host-side optical transmitting and receiving apparatus has a diffuse reflection surface on a flat plate, and a light beam converting surface for diffusing and reflecting the optical signal; A light-receiving means provided on a substantially parallel plane separated by a predetermined distance from the light-flux conversion surface and provided with a light-receiving element for receiving an optical signal from the terminal-side optical transceiver; A light-transmitting means comprising a plurality of light-emitting elements which are disposed at substantially equal intervals on a substantially flat surface between the light-emitting elements and emit light signals having narrow directivity or light condensing properties corresponding to transmission information; The projected light from the light emitting element A light transmitting / receiving device configured to irradiate a spot within a desired limited range of the light beam converting surface. 3. A connection between a host-side optical transmitting / receiving device connected to a host computer or the like on a network and one or more terminal-side optical transmitting / receiving devices connected to an information terminal device or the like distributed and arranged at an arbitrary position. In an optical transmitting and receiving apparatus for transmitting and receiving the transmission of information using an optical signal, the host-side optical transmitting and receiving apparatus is provided with a light emitting element which emits an optical signal having a narrow directivity or a condensing property corresponding to the transmission information. Light transmitting means, a light receiving element provided with a light receiving element for receiving an optical signal from the terminal side optical transmitting and receiving device, and a light projected from the light transmitting means provided on a front surface of the light transmitting means. A light beam conversion surface for transmitting and diffusing a signal and transmitting the signal to the terminal-side optical transceiver. 4. The communication of information between a host optical transmission / reception device connected to a host computer or the like on a network and a terminal optical transmission / reception device connected to an information terminal device or the like distributed and arranged at an arbitrary position. In an optical transmission / reception device for transmitting / receiving transmission using an optical signal, the host-side optical transmission / reception device receives an optical signal from the terminal-side optical transmission / reception device at a substantially central portion on a support member having a predetermined height. Light receiving means provided with a light receiving element, and light emitting elements for irradiating an optical signal having a narrow directivity or a condensing property in a substantially vertical direction corresponding to transmission information are provided at substantially equal intervals around the light receiving means. A light transmitting means, and a light transmitting means, the light transmitting means being disposed on a plane separated by a predetermined distance from the light transmitting means and at a position irradiated with light from the light emitting element within a limited area of the plane. Light projected from And a light beam conversion surface for irradiating the irradiation light to the terminal-side optical transmission / reception device. 5. The optical transceiver according to claim 1, wherein the secondary light source on the light beam conversion surface is formed by irradiating the plurality of light emitting elements. 6. The light receiving means according to claim 1, wherein the light receiving means is constituted by a light receiving element in which a convex lens and a hemispherical lens are integrated so that a focal position of the convex lens is a light receiving surface.
5. The optical transmitting and receiving device according to any one of items 4 to 4. 7. A secondary light source on the light beam conversion surface is disposed within a radius r, and the speed of light in air is C, and the bit rate of an optical signal is B.
4. The optical transceiver according to claim 1, wherein a relationship of r ≦ C / 4B is satisfied. 8. A connection between a host-side optical transmitting / receiving apparatus connected to a host computer or the like on a network and one or more terminal-side optical transmitting / receiving apparatuses connected to information terminal equipment or the like distributed and arranged at an arbitrary position. In an optical transmitting and receiving apparatus for transmitting and receiving the transmission of information using an optical signal, the host-side optical transmitting and receiving apparatus is provided with a light emitting element which emits an optical signal having a narrow directivity or a condensing property corresponding to the transmission information. A light transmitting means, a light receiving means provided with a light receiving element for receiving an optical signal from the terminal side optical transmitting / receiving device, and a lens array constituted by a group of minute lenses, and an optical signal from the light transmitting means. And a light beam diffusing means for converting the wavefront into a wavefront and projecting the wavefront onto the terminal-side optical transmitting / receiving device. 9. The light beam diffusing means comprises a lens array having a focal length set to be longer toward the outside of a lens near an optical axis of a light emitting element of the light transmitting means. An optical transmitting / receiving device according to claim 1. 10. The light beam diffusing means uses a lens array substrate in which a lens array member is formed in the same substrate and the surface of the substrate is processed or a predetermined refractive index distribution is formed inside the substrate. The optical transmitting / receiving device according to claim 8, wherein: 11. The light beam diffusing means, wherein a substrate forming a lens array is constituted by a reflective lens array of a material having high thermal conductivity, and the light beam diffusing means drives a light emitting element of the light transmitting means. 9. The optical transmitting and receiving apparatus according to claim 8, wherein all / a part of the signal transmitting / receiving part is in contact with a signal processing circuit component for processing a light receiving signal of the light receiving means. 12. The optical transmitting and receiving apparatus according to claim 8, wherein said light beam diffusing means integrally forms a condensing lens for condensing light received by said light receiving means. 13. The light beam diffusing means includes a lens group forming a lens array and a light scattering means for scattering light to a portion other than the lens group.
An optical transmitting / receiving device according to claim 1. 14. The light beam diffusing means according to claim 8, wherein the light axis of the light emitting element of the light transmitting means and the corresponding lens are substantially coincident with each other, and are arranged in a curved shape having a predetermined curvature. The optical transmitting / receiving device as described in the above. 15. The terminal-side optical transmission / reception device, wherein at least the light-sending means and the light-receiving means are arranged in the same housing, and the optical axes of the light-sending means and the light-receiving means are aligned with the host-side optical transmission / reception means. 5. The apparatus according to claim 1, wherein the apparatus is configured to be movable and adjusted to a position where transmission and reception can be performed with respect to the apparatus.
An optical transmission / reception device according to claim 8 or claim 9. 16. An optical switch for irradiating and selecting an optical axis adjusting optical signal, wherein the housing is movable with respect to the host side optical transmitting and receiving device side, and the optical axis adjusting light. Display means for receiving a signal and displaying its light intensity;
The optical transceiver according to claim 15, further comprising: 17. The light according to claim 1, wherein a plurality of light emitting elements having different wavelengths and a plurality of light receiving elements corresponding to the wavelengths of the light emitting elements are used. Transceiver.