JPH04108231A - Optical space communication equipment - Google Patents

Abstract

PURPOSE:To make the equipment compact and to facilitate the handling by containing a collimation mirror movably so that at least its eyepiece is able to be extracted at the outside of the communication equipment main body, extracting the eyepiece only at the time of angle adjustment and containing the collimation mirror into the equipment main body in other case. CONSTITUTION:A collimation mirror 1 is contained in an equipment main body 2 when the collimation mirror 1 is not in use and a leadout port 2a is closed by a cover 3. Then the cover 3 is removed at the time of adjustment of the angle and an eyepiece la is extracted to the outside and used. Moreover, as the method extracting the eyepiece 1a externally, the entire collimation mirror 1 is mounted movably and it is extracted entirely. Thus, no excess projection exists at the time of containment of the collimation mirror 1. Thus, the entire size is made compact and the operability such as handling and carrying is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to an optical space communication device that uses free space as a transmission path to transmit optical signals and perform communication.

[Prior Art] Conventionally, an optical space communication system is known in which an optical signal is sent out from a transmitting device in the form of a parallel beam, and the optical signal is transmitted to a receiving device separated by a long path M (several hundreds to several kilometers). .

This communication system has a configuration as shown in FIG. 4, for example. In the figure, a light beam modulated according to a signal and oscillated from a light emitting element 41 such as an LD or LED on the transmitting side is converted into a parallel beam by a collimating optical system 42, and is transmitted through free space and focused on the receiving side. The light is focused by the optical system 43 for PIN-PD ( ), APD (
The light is received by a light receiving element 44 such as an avalanche photodiode. Here, the received optical signal is converted into an electrical signal and read out.

However, in order to carry out such communication effectively, the mutual positional relationship between the standard 1145.46 and the optical system 42.43 must be determined in advance by adjusting the angle on the transmitting and receiving sides. As shown in FIG. , it is necessary to adjust the angle of the receiving device, that is, it is necessary to provide a collimating mirror 45, 46 on the transmitting and receiving device containing the light emitting element 41, light receiving element 44, etc. (right).

[Problems to be Solved by the Invention] The presence of collimating mirrors 45 and 46 as described above causes the following problems.

(1) Sighting mirrors that require precise mechanisms are exposed to outdoor environments such as wind, rain, sunlight, and dust, causing failures and functional deterioration. Especially when using the scope for a long period of time,
This bending cannot be ignored.In response to this, it is possible to equip the sight mirror with environment-resistant equipment5, but this is natural.

Other problems arise such as high cost and increased weight (2)
As shown in FIG.
The eyepiece part 61 of No. 6 must protrude from the rear in order to see with the eye), that is, even if your body hits the sight mirror a little, the adjustment of the device will go wrong, so it is only the part of the sight mirror. This results in an excessive increase in volume, which causes handling problems such as difficulty in handling.

Regarding this, as shown in FIG.
A protective cap 71 is attached to the eyepiece 61 when not in use.
Although a method of attaching the cap 71 may be considered, the cap 71 would protrude and would not solve the handling problem.

Therefore, in view of the above-mentioned problems, an object of the present invention is to provide an optical space communication device having a configuration in which the collimating mirror is not exposed to the outdoor environment, and the device as a whole is compact and easy to handle. There is a particular thing.

[Means for Solving the Problems 1] In the optical space communication device according to the present invention that achieves the above object,
Telescope or sight 1 for angle adjustment! In an optical space communication device having a mirror, the collimating mirror is built in the device main body and is movably attached so that at least the eyepiece part of the collimating mirror can be pulled out of the device main body, so that the collimating mirror can be moved only when adjusting the angle. The apparatus further includes the ability to pull out the eyepiece part for use and store it within the main body of the apparatus at other times.

With this configuration, the sighting mirror is not always exposed to the external environment, and the device can be made compact when handling the device.

[Example code] FIG. 1 shows an embodiment of the invention.

When the viewing mirror 1 is not in use, it is stored inside the device body 2, and the drawer opening 2a is closed with the lid 3. (When adjusting the angle, remove the lid 3 and pull out the eyepiece 1a. To use it, look into the other party's device through the window 2b, and
This is done as described in connection with FIGS.

The method of pulling out the eyepiece part 1a is to attach it to a reference at which is entirely movable, and then pull it out as a whole (Figure 2(a)).Another method is to pull it out as a whole (Figure 2(b)). As shown in (), the reference mirror main body part 1b is kept fixed and only the movable eyepiece part 1a' is pulled out. In this case, the eyepiece lens 1c in the eyepiece part la is moved back and forth to adjust the focus. can also be done at the same time.

In FIG. 1, 4 is an optical system such as a collimating optical system and a focusing optical system, and 5 is a light emitting element such as an LD or a PD.
It is a light receiving element such as.

By the way, the movement direction of the entire collimator or the eyepiece 1a is the parallel movement direction in the front and back directions in the above embodiment, but it is not limited to this, and the movement direction is not limited to this. Appropriate combinations of methods can also be used depending on the form of the device.

Further, the lid 3 may be connected to the device main body 2 with a string or the like so that it will not be lost when removed.

FIG. 3 shows a modified example. In this example, an optical system 4 is used as a component of the collimating mirror or telescope 1, and the light from there is transmitted to optical parts 7 such as movable mirrors, guichroic mirrors, and half mirrors. The light is guided to a movable eyepiece section la via an optical component 8 such as a mirror or a prism. When not in use, the eyepiece 1a is stored, and when in use, it is pulled out (the state shown in FIG. 3). This is, so to speak, TTL for cameras.
It is a method. Although the optical system 4 can be used in combination, the other optical systems become somewhat complicated.

[Effects of the Invention] As described above, according to the present invention, the telescope or the telescope is not constantly exposed to the outdoor environment, so the reliability is improved without deteriorating the function. See you again? Since there are no unnecessary protruding parts when the mirror is stored, it becomes more compact as a whole, improving operability in handling and transportation, and also improves the appearance of the mirror.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention, and FIG. 2 (a
), (b) is visual a! A diagram to explain how to pull out the eyepiece part of the chisel, Figure 3 is a schematic configuration diagram of a modified example, Figure 4 is a diagram to explain the conventional collimator, and Figure 5 is the field of view of the collimator. FIG. 6 is a diagram showing a conventional form of the eyepiece, and FIG. 7 is a diagram showing a conventional example provided with a protective cap. 1... Standard f4.1a... Eyepiece, 1b.
...Visibility 1! Mirror body, 1c...Eyepiece, 2
...Device body, 2a...Bow outlet, 2b
... window, 3 ... lid, 4 ... optical system,
5... Light emitting or light receiving element, 7... Optical components such as movable mirrors, 8... Optical components such as mirrors.

Claims (1)

[Claims] 1. In an optical space communication device having a collimating mirror for angle adjustment, the collimating mirror is built into the device main body, and at least the eyepiece portion of the collimating mirror is located outside the device main body. An optical space communication device characterized in that it is movably attached so that it can be pulled out, so that the eyepiece can be pulled out and used only when adjusting the angle, and stored in the device body at other times. 2. The optical space communication device according to claim 1, further comprising a lid that closes the drawer opening when the entire collimating mirror is housed in the device main body. 3. The optical space communication device according to claim 1, wherein only the eyepiece is movably attached. 4. The optical space communication device according to claim 1, wherein the entire collimating mirror is movably attached.