JPH0365061B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical space transmission system using light with a moving body.

[Conventional technology]

FIG. 3 is a block diagram of a conventional optical space transmission system.

A and B indicate each communication station, and the configuration of communication station A is as follows.

1 is a first two-dimensional position detector, for example
It consists of a TV camera, PSD, etc. 2 is a first transmitter, 3 is a beam splitter, 4 is a communication line consisting of the first light beam transmitted from the first transmitter 2, and 5 is a second two-dimensional position detector for the first light beam. , 6 is a transmitting unit composed of a first transmitter 2, a beam splitter 3, and a second two-dimensional position detector 5, 7 is a precision positioning mechanism (first mechanism) of this transmitting unit 6, and 8 is a This is a target that indicates the location of communication station A, and is composed of, for example, an LED. 9 is a beam splitter, 10 is a corner cube, 11 is a first receiver installed at a position geometrically symmetrical to the vertex of the corner cube 10 with respect to the beam splitter 9, and 12 is a communication device including the above-mentioned components. This is the second mechanism that moves the entire station A to perform rough positioning (coarse positioning) with respect to the other station.

Next, the other communication station B has a positioning configuration similar to that of communication station A as described below.

In the figure, 13 is a target made of an LED, for example.
14 is a beam splitter; 15 is a corner cube; 16 is a second receiver that receives the first light beam 4 sent from the first transmitting device 2 on the communication station A side via the beam splitter 14; With respect to the beam splitter 14, it is located at a position that is geometrically symmetrical to the apex of the corner cube 15. 17 is a fourth two-dimensional position detector, which is the same as the first two-dimensional position detector 1 on the communication station A side described above. 18 is a beam splitter; 19 is a second transmitter that sends a second beam of light toward the communication station A through the communication circuit 20 via the beam splitter 18; and 21 is a second beam reflected from the corner cube 10 on the communication station A side. is a fifth two-dimensional position detector that receives the light beam 20 through the beam splitter 18 and detects the position of the second light beam with respect to the first receiver 11, and the second two-dimensional position detector It has the same configuration as container 5. 22 is a transmitting section composed of a beam splitter 18, a second transmitter 19, and a fifth two-dimensional position detector 21; 23 is a precision positioning mechanism (third mechanism) for this transmitting section 22;
Reference numeral 24 denotes a fourth mechanism that moves the entire communication station B configured as described above to perform rough positioning (coarse positioning) with respect to the communication station A, which is the other station, and has the same configuration as the second mechanism described above. It is.

Next, the operation will be explained.

First, a case will be described in which the positioning of the first light beam with respect to the second receiver 16 is performed on the communication station A side.

The first two-dimensional position detector 1 detects the position of the target 13, that is, the position of the other station, and based on this detection output (position data), the transmitter 6 is controlled by the coarse positioning mechanism (second mechanism) 12. The entire communication station A is moved and roughly positioned so that the first light beam is incident on the corner cube 15. This allows the second receiver 16 of the first beam to
A coarse positioning of the first transmitter 2 can be performed.

Furthermore, precise positioning of the first beam is performed by detecting the deviation of the first beam from the center of the corner cube 15, that is, the partner station. In detail, this deviation is detected by the second two-dimensional position detector 5 of the first light beam reflected by the corner cube 15, and based on this detection output (position data), a precision positioning mechanism (second The position of the transmitter 6 is corrected by driving the mechanism (1) 7. With this correction, positioning of the first light beam with respect to the second receiver 16 (precision positioning of the first transmitter 2) is completed on the communication station A side.

Next, when positioning the second light beam with respect to the first receiver 11 on the communication station B side, the positioning operation of the first light beam described above is performed as described below.

The position of the target 8 is detected by the fourth two-dimensional position detector 17, and this detection output (position data)
Based on this, the entire communication station B is moved by the rough positioning mechanism (fourth mechanism) 24 to move the transmitter 22 to the second position.
Rough positioning is performed so that the light beam enters the corner cube 10. This allows coarse positioning of the second light beam to the first receiver 11 (second
coarse positioning of the transmitter 19).

Furthermore, precise positioning of the second light beam is performed by detecting the deviation of the second light beam from the center of the corner cube 10. Specifically, the second light beam reflected by the corner cube 10 is detected by the fifth two-dimensional position detector 21, and based on this detection output (position data), a precision positioning mechanism (the fifth 3) The position of the transmitter 22 is corrected by driving the mechanism 23. With this correction,
Positioning of the second light beam with respect to the first receiver 11 (rough positioning of the second transmitter) is completed on the communication station B side.

[Problem that the invention seeks to solve]

Conventional optical space transmission systems are configured as described above, and when performing bidirectional communication, there is a problem in that when each communication station is provided with a positioning device for a transmitting/receiving station, the device becomes large.

This invention was made to solve the above-mentioned problems, and aims to provide a compact optical space transmission system capable of bidirectional communication.

[Means for Solving the Problems] The optical space transmission system according to the present invention utilizes communication data for positioning of light beams.

[Effect]

The use of communication data in this invention is two-fold: when a communication line in one direction is secured, the positioning data of the light beam in the other direction is transmitted over the secured communication line to detect the position of the receiving station. It is possible to omit the dimensional position detector and the corner cube used for precise positioning of the target and the beam.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

In the figure, at communication stations A and B, 1 to 7, 9, 1
1 to 16, 19, and 20 have the same structure as in FIG. A third beam 25 receives the second beam via the beam splitter 9 and is used to detect the position of the communication station B.
a two-dimensional position detector, 26 a transmitting unit composed of a second transmitter 19, 27 a precision positioning mechanism (third mechanism) for the second light beam with respect to the first receiver 11, and 28 a This is the fourth mechanism for roughly positioning (coarse positioning) relative to the other station by moving the entire communication station B configured as described above.

Comparing the communication station configured in this way with the conventional example shown in FIG. 3, in communication station A, the target 8 and corner cube 10 in the conventional example are omitted. Furthermore, in the communication station B, the fourth two-dimensional position detector 17, the beam splitter 18, and the fifth two-dimensional position detector 31 in the conventional example are not configured.

As described above, the embodiments of the present invention are characterized in that the device configuration is simplified and the device is made smaller.

Next, the operation of this embodiment will be explained with reference to FIG. 2.

First, communication station A detects communication station B, and then
The procedure for positioning the first beam from the side is the same as that described in the conventional example. That is, the communication station B, which is the other station, is detected by the target 13 and the first two-dimensional position detector 1, and the first transmitter 2 is roughly positioned based on the position data obtained by this detection. Furthermore, the other station, that is, the communication station B, is detected by the corner cube 15 and the second two-dimensional position detector 5, and precise positioning of the first transmitter 2 is completed based on the position data obtained by this detection.

Next, the procedure for positioning the second light beam 20 from the communication station B side, that is, the procedure for positioning the second transmitter 19, does not repeat the operation performed at the communication station A, as in the conventional case. This is a structural feature of this embodiment. Communication station A has a first two-dimensional position detector 1
Since communication station B already knows the approximate location of communication station B, communication station B receives the location data regarding the approximate location of communication station B sent from communication station A using communication line 4, and determines this location. Based on the data, the coarse positioning mechanism (fourth mechanism) 28 roughly positions the communication station B, that is, the second transmitter 1.
9. Perform rough positioning.

That is, the position data of the target 13 obtained by the first two-dimensional position detector 1 is transmitted from the communication station A to the communication station B via the communication line 4, and based on this position data, the fourth mechanism 28 detects the target 13 from the communication station. By driving the entire beam B, the second light beam is roughly positioned with respect to the first receiver 11.

Next, the positional deviation of the second light beam with respect to the first receiver 11 is detected by the third two-dimensional position detector 25, and this position data is transmitted to the communication station B via the communication line 20. . In the communication station B, based on this position data, the third mechanism 27
The positional deviation of the light beam with respect to the first receiver 11 is corrected. Thereby, precise positioning of the second light beam, that is, precise positioning of the second transmitter 19, can be performed, and a communication path between communication stations A and B can be secured.

〔Effect of the invention〕

As described above, according to the present invention, since the light beam is positioned using communication data, it is possible to downsize the apparatus compared to the conventional apparatus.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an optical space transmission system according to an embodiment of the present invention, FIG. 2 is a flowchart showing the operation of the embodiment, and FIG. 3 is a block diagram showing a conventional system. In the figure, 1 is the first two-dimensional position detector, 2 is the first
, 5 is a second two-dimensional position detector, 7 is a first mechanism, 11 is a first receiver, 12 is a second mechanism, 13 is a target, 15 is a corner cube,
16 is a second receiver, 19 is a second transmitter, 25
is the third two-dimensional position detector, 27 is the third mechanism,
28 is a fourth mechanism. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] 1 A first two-dimensional position detector that detects the position of the other station, a first transmitter that sends a first beam of light toward the other station, and a second two-dimensional position detector that detects the position of the first beam of light. a position detector, a first mechanism that performs precise positioning of the first beam, a first receiver that receives the second beam sent from the partner station, and a first receiver that detects the position of the second beam. One communication station is equipped with a two-dimensional position detector No. 3 and a second mechanism for rough positioning of the first beam, and a target indicating the position of the own station;
a corner cube that reflects a first light beam toward the communication station; a second receiver that receives the first light beam; a second transmitter that sends the second light beam to one of the communication stations; The other communication station is equipped with a third mechanism for precise positioning of the second beam and a fourth mechanism for rough positioning of the second beam, and the first two-dimensional position detector detects the position of the target. Based on this detection output, the second mechanism performs rough positioning of the first light beam with respect to the second receiver, and the first mechanism performs rough positioning of the first light beam with respect to the second receiver based on the output of the second two-dimensional position detector. The target position data is sent to the other communication station, and based on this position data, the fourth mechanism performs coarse positioning of the second beam relative to the first receiver, and the third The positional deviation data of the second beam obtained by the two-dimensional position detector is sent to the other communication station, and based on this positional deviation data, a third mechanism performs precise positioning of the second beam with respect to the first receiver. Optical space transmission method.