JPH0821905B2 - Optical space transmission device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a system capable of bidirectional optical space transmission using a laser beam, which enables long-distance communication and facilitates optical axis positioning.
The present invention relates to an optical space transmission device provided with a shaft actuator.

[0002]

2. Description of the Related Art Conventionally, this type of optical space transmission system has been
It consists of a transmitter that optically modulates an input signal and transmits an optical transmission signal through a lens, and a receiver that detects and demodulates the optical transmission signal through a lens, and the optical axis alignment is performed manually. Met.

[0003]

By the way, in the case of performing long-distance communication, the optical axis deviation allowable value between the transmitter and the receiver is on the order of several tens of seconds, so that the initial setting is difficult and the communication is difficult. There is also a problem in that the optical axis shifts due to the position shift of the gantry due to the time disturbance and the like, which interrupts the communication action. Therefore, there has been a demand for an adjusting means that is easy to handle and can surely correct the deviation of the optical axis during operation. An object of the present invention is to improve the above-mentioned problems, and it is possible to perform bidirectional transmission / reception in which deviation of the optical axis is prevented and fine adjustment of the optical axis is automatically and easily achieved. Another object is to provide a simple optical space transmission device.

[0004]

To achieve the above object, the present invention optically modulates an input signal to obtain a lens (6),
A transmitter (2) for transmitting an optical transmission signal (b) via (7), a lens (8) for transmitting the optical transmission signal (b),
In a space optical transmission system comprising a receiver (3) for detecting and demodulating via (9), the transmitter (wherein the lenses (6), (7) and (8), (9) are provided. 2) and a lens barrel holding member (14) for fixing the optical mechanism (13) of the receiver (3) and a cylindrical shape, and the lens barrel holding member (14) is housed inside and rotated in the yawing direction. A movable gimbal (16) and a pair of first actuators (2) for swinging the lens barrel holding member (14) with respect to the gimbal (16) in the pitching direction.
2), (24) and a pair of second actuators (4) for swinging the gimbal (16) in the yawing direction.
4), 46, a first sensor 52 for sensing the pitching position of the lens barrel holding member 14, and a second sensor 6 for sensing the yawing position of the gimbal 16.
6) and an optical space transmission device having a biaxial actuator for positioning the optical axis of the optical transmission signal (b), the first and second actuators (22),
Reference numerals (24), (44), and (46) denote an optical space transmission device (1) having two biaxial actuators connected in parallel so as to face each other on the same vertical and horizontal axes of the gimbal (16). . The first sensor (52) for detecting the pitching position of the lens barrel holding member (14) is a light receiving element (64) arranged on a support arm (60) attached to the yoke (30) of the first actuator (24). ) And the light receiving element (64) so as to face each other, the first actuator (2
4) Pitching bracket (5) fixed to the shaft (20)
The second sensor (66) for detecting the yawing position of the gimbal (16) is composed of the light emitting element (58) mounted on the support table (56) attached to the gimbal (16).
Light receiving element (78) arranged on a supporting arm (76) fixed to the
And a light-emitting element (72) provided on a support (68) provided on the lower frame (23b) so as to face the light receiving element (78) Is. The pair of first actuators (22) and (24) are movable wheel type actuators, and the pair of second actuators (44) and (4).
6) is an optical space transmission device having a biaxial actuator composed of a movable magnet type actuator.

[0005]

By employing a biaxial actuator in the optical space transmission device of the present invention, a lens barrel holding member for fixing an optical mechanism equipped with a lens is provided inside the transmitter and the receiver.
A first actuator for accommodating the lens barrel holding member and a cylindrical gimbal rotatably supported in the yawing direction so as to swing the lens barrel holding member in the pitching direction and the gimbal are yawed. A second actuator that is swingable in a predetermined direction is provided, and two first or second actuators are provided in parallel connection so as to face each other on the same vertical and horizontal axis of the gimbal, and a preset lens barrel holder is provided. When the position of the member changes and the lens barrel holding member is displaced in the pitching direction, the first sensor senses the displacement and sends a signal to the first actuator, and the first actuator is activated to operate the lens barrel holding member. When the gimbal moves in the yawing direction, the second sensor senses the displacement and the second position is detected.
The optical axis of the optical transmission signal can be positioned by sending a signal to the actuator and swinging the second actuator to return the position of the gimbal to a predetermined position, and further, the first sensor and the second sensor. The sensor signal
By incorporating a control system capable of switching to the signal of the two-dimensional position detecting element provided inside the receiver, fine adjustment of the optical axis shift caused by disturbance during operation can be automatically and easily achieved. .

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 7 shows the principle of the transmitting / receiving optical space transmission device. In the figure, the transmitting / receiving optical space transmission apparatus 1 is composed of a transmitter 2 and a receiver 3. The transmitter 2 receives an optical transmission signal via an optical mechanism 13 including a modulator 5 that inputs and modulates an input signal a, a laser light source 4 that inputs the modulated signal, and two lenses 6 and 7. Send b.
The receiver 3 includes two lenses 8 and 9 forming an optical mechanism 13, a detector 10 for detecting an optical transmission signal b input through the lenses 8 and 9, and a beam splitter for splitting the transmission signal. A two-dimensional position detecting element 19 for detecting a transmission signal divided by 17 and a divided transmission signal as a position reference signal;
It comprises an amplifier 11 for amplifying the output of 0 and a demodulator 12 for demodulating the output of the amplifier 11 and outputting an output signal c. The optical mechanisms 13 including the lenses 6 and 7 of the transmitter 2 and the lenses 8 and 9 of the receiver 3 are housed and fixed in the lens barrel holding member 14. Since the optical space transmission device of the present invention incorporates the transmitter 2 and the receiver 3,
Light can be transmitted and received in both directions. FIG. 1 is a front sectional view of a biaxial actuator adopted in the optical space transmission device of the present invention,
FIG. 2 shows a side view of FIG. As illustrated, the biaxial actuator is housed in a frame F formed by the side frames 21a and 21b, the upper frame 23a, and the lower frame 23b. In FIGS. 1 and 2, the optical mechanism 13 is fixed to the inside of the lens barrel holding member 14 by a set screw 15. A gimbal 1 is provided on the outer periphery of the lens barrel holding member 14.
6 is provided. The rotation shaft 1 is provided on both sides of the lens barrel holding member 14.
8 and 20 are mounted horizontally, and these rotary shafts 18,
20 is provided with a pair of movable wheel-type actuators 22 and 24 on the same axis so as to face each other. The structures of the movable wheel type actuators 22 and 24 are substantially the same. First, the movable wheel actuator 22 will be described. The stator includes a rotating shaft 18 via a bearing 26.
And a plurality of magnets 32 are arranged inside the back yoke 28. The substrate 34 forming the rotating portion is fixed on the hub 36 fitted and fixed to the rotating shaft 18, and the magnet 3 is attached to the upper surface on the yoke 30 side.
A plurality of air-core coils 38 are provided so as to face 2. The arrangement of the air-core coil 38, the magnet 32, and the hub 36 is shown in FIG. Further, the hub 36 and the rotating shaft 18
The balancer 40 projectingly housed in the hole 41 formed in the side surface frame 21b is fixed to this. Reference numeral 35 is a lead wire. An actuator 24 having the same structure as the movable wheel actuator 22 is mounted on the rotary shaft 20, and a pitching bracket 57 for mounting a light emitting portion 52a of a first sensor 52 described later is fixed to the rotary shaft 20. ing.

Next, the operation of the pair of movable wheel type actuators 22 and 24 will be described. As will be described later, the light emitting portion 52a of the first sensor 52 is displaced in the pitching direction together with the lens barrel holding member 14, and the light emitting element 58 causes the light receiving portion 52.
When the position facing the light receiving element 64 which is the position detecting element of b is deviated from the set value (hereinafter, the light receiving element 64 which is the position detecting element is simply referred to as the light receiving element 64), the current moves through the lead wire 35. The coils 38 of the wire-wheel actuators 22 and 24 are energized, and an electromagnetic force is generated between the coils 38 of the coils 38 in the air gap magnetic field generated by the magnetic flux of the magnet 32. Hub 3
6, the rotation shafts 18 and 20, and the lens barrel holding member 14 are swung in the pitching P direction. Therefore, when the position of the lens barrel holding member 14 is changed, the movable wire ring type actuators 22 and 24 are useful for returning the lens barrel holding member 14 to the predetermined position. In addition, the above-mentioned first sensor 52 and second sensor 66
The actuators 22 and 24 can be driven in the same manner even if the two-dimensional position detecting element 19 is switched to the two-dimensional position detecting element 19 and the light source of the two-dimensional position detecting element 19 deviates from the set value. Next, a pair of movable magnet type actuators 44 and 46 are mounted above and below the gimbal 16. The movable magnet type actuators 44 and 46 are basically the same as the movable coil type actuators 22 and 24 described above, and are mounted on the outer periphery of the vertical axis 47 together with the gimbal 16 so as to be swingable in the yawing direction. . In the movable magnet type actuators 44 and 46, the back yoke 28,
Hub 4 fixed to substrate 34 arranged inside yoke 30
8 is fixed to the upper frame 23a and the lower frame 23b by screws 49, respectively, and at the same time, the back yoke 2
8 is fixed to the gimbal 16 with screws 50. Therefore, the light receiving element 78 (hereinafter simply referred to as the light receiving element 78), which is the position detecting element of the support arm 76 of the light receiving portion 66b of the second sensor 66.
Is displaced in the yawing direction together with the support arm provided on the gimbal 16, causing a face-to-face displacement between the light emitting element 72 and the light receiving element 78, and the coil 38 is energized by the lead wire 35 via a circuit (not shown). The substrate 34 does not swing, but the back yoke 28 and the yoke 30 can swing together with the gimbal 16 in a predetermined direction, that is, in the yawing Y direction, which helps return the displaced gimbal 16 to a predetermined position. Also, by switching the first sensor 52 and the second sensor 66 to the two-dimensional position detecting element 19, a deviation from the set value of the light source of the two-dimensional position detecting element 19 may occur.
46 can be driven.

Therefore, a movable coil actuator and a movable magnet actuator of this type which have been conventionally used are shown in FIGS. 9, 10 and 11 and 12, respectively. First, the movable wheel actuator will be described with reference to FIGS. 9 and 10. A fixed yoke 83 formed integrally with the back yoke 82 is provided with a rotating shaft 80 via a bearing 81.
Is pivotally supported. The substrate 86 is fitted and fixed to the rotary shaft 80, and is rotatable in the arrow pitching P direction together with the rotary shaft 80. An air-core coil 84 is arranged on one side surface of the substrate 86, and the fixed yoke 83 is provided so as to face the coil 84.
The permanent magnet 85 is fixed inside. Reference numeral 87 is a lead wire. When the lead wire 87 is energized, an electromagnetic force is generated between the lead wire 87 and the air-core coil 84 in the magnetic field generated by the magnetic flux φ generated by the permanent magnet 85 shown in FIG. It rotates in a magnetic field. This activates the movable wheel actuator.

Next, a movable magnet type actuator of a conventional example will be described with reference to FIGS. 11 and 12. A rotating yoke 94 is rotatably supported by a fixed shaft 90 via a bearing 91. It The back yoke 93 has a fixed shaft 9
Then, the coil substrate 95 is fixed inside the back yoke 93. An air-core coil 96 is mounted on the upper surface of the coil substrate 95, and a permanent magnet 97 is arranged on the inner surface of the rotating yoke 94 so as to face the coil 96. Reference numeral 98 is a lead wire of the air-core coil, and 92 is a fixed shaft retainer. By energizing the lead wire 98,
In the magnetic field generated by the magnetic flux φ generated by the permanent magnet 97 as shown in FIG. 12, an electromagnetic force is generated between the air-core coil 96 and the rotating portion including the rotating yoke 94, the permanent magnet 97, etc. within the magnetic field. , The movable magnet type actuator operates by rotating in a predetermined direction.

However, the above-mentioned actuator has the following drawbacks. First, in the movable wheel-type swing actuator shown in FIGS. 9 and 10, when trying to obtain a high output torque, the size becomes large, and the movable part and the electromagnetic force generating part are not arranged in axial symmetry. The load may change depending on the posture, and the output torque may change due to the change or loss of the bearing load due to the torsional force.Therefore, it is difficult to adopt a flat configuration with high output torque, and the actuator life is short, There were drawbacks such as loss. Next, referring to FIG.
In the case of the movable magnet type actuator shown in FIG. 12, since the air gap magnetic flux due to the permanent magnet interlinks with the back yoke at the same time as the coil conductor, iron loss such as eddy current loss and hysteresis loss due to magnetic flux movement in the back yoke occurs. As a result, the cogging torque is generated due to the residual magnetism and the minute permeance change of the magnetic path, and the smooth rotation is impaired. If the permanent magnet is made strong to increase the torque, a high thrust load is applied to the bearing, which may cause loss and damage to related members. Since the fixed yoke and the back yoke are formed as separate bodies, there are drawbacks such as a large leakage magnetic flux φl to the outside as shown in FIG. In the movable wheel type actuator and the movable magnet type actuator of the present invention which have already been disclosed, improvements have been added to eliminate these drawbacks.

That is, in the movable coil actuator of the present invention, the substrate 34 is provided in the space of the yoke composed of the back yoke 28 and the rotating yoke 30 which are rotatably supported by the fixed shafts 18 and 20. A plurality of air-core coils 38 are arranged at appropriate positions on the circumference of the substrate 34 on the back yoke 28 side, and the substrate 34 is positioned so that the coils 38 are located in a plane orthogonal to the fixed shafts 18 and 20. And fixed shaft 18,2
This is a movable coil type actuator in which a permanent magnet 32 is disposed on the inner surface of the rotary yoke 28 so that 0 is fixed and the substrate 34 provided with the coil 38 is faced. Further, in the movable magnet type actuator, the hub 48 to which the substrate 34 is fixed is attached to the upper frame 23a and the lower frame 23b by screws 49 respectively.
The back yoke 28 is fixed at the same time as the gimbal 16
The back yoke 28 and the yoke 30 to which the magnets 32 are attached are movable magnet-type actuators that can be swung in a predetermined direction together with the gimbals 16, although they are fixed with the screws 50 and the substrate 34 cannot swing. In the following description and claims, the movable coil type actuator is simply referred to as a first actuator, and the movable magnet type actuator is simply referred to as a second actuator.

Next, the sensor of the present invention will be described. The first sensor 52 includes a light emitting portion 52a and a light receiving portion 52b,
The light emitting portion 52 a is provided on the rotary shaft 20 of the first actuator 24.
It is composed of a support base 56 fixed to a pitching bracket 57 fixed to the base plate with screws 54, and a light emitting element 58 arranged at a central position on the support base. In addition, the light receiving portion 52b includes the curved support arm portion 6 fixed to the yoke 30 of the first actuator 24.
The light receiving element 64 is disposed below the supporting table 62 provided at 0 so as to face the light emitting element 58. The light emitting portion 66a of the second sensor 66 is composed of a light emitting element 72 disposed at an end of a pedestal 70 mounted on a supporting base 68 provided on the lower frame 23b, and the light receiving portion 66b is adapted to hang down on the gimbal 16. The light receiving element 78 is provided at the end of the arm portion 76 fixed by the screw 74 so as to face the light emitting element 72.
Therefore, the light emitting element 58 and the light receiving element 64, and the light emitting element 72 and the light receiving element 78 of the first sensor 52 and the second sensor 66 are arranged at positions facing each other. A case will be described in which the light emitting element 58 and the light receiving element 64 of the light emitting portion 52a of the first sensor 52 of the present invention are displaced in the facing position. Normally, the tubular pressing member 14 is displaced in the pitching direction, and the pitching bracket 57 fixed to the rotating shaft 20 of the tubular pressing member 14 is displaced together with the support base 56 in the pitching direction within a predetermined range, and is displaced accordingly. Support stand 5
The light emitting elements 58 provided at the six ends are also displaced within a certain range. On the other hand, the light receiving element 64 of the light receiving portion 52b is configured to have a certain range of width and length.
The emitted light can be received within a predetermined range of the light receiving element 64 of the light receiving section 52b. Thus, the light emitting element 5
Controlling the actuator so that the light beam emitted from the position 8 to the light receiving element 64, which is a position detecting element, is received at an arbitrary set position within a predetermined range is generally called as servo locking. This state is shown in FIG.
In the figure, d is a light emitting portion, e is a light emitting element, f is a light receiving portion, g is a light receiving area of the light receiving element, 1 is a light ray, and the light ray 1 can be received within the light receiving area. In this embodiment, the light receiving area range is set to about 5 ° to the left and right with respect to the axis of the light emitting element 58. Second
Similarly in the sensor 66, when the support arm 76 of the light receiving portion 66b of the second sensor 66 is displaced in the yawing direction together with the gimbal 16, the light beam from the light emitting element 72 is
The actuators 44 and 46 are controlled so that light is received and held at an arbitrary set position within the predetermined range of the light receiving element 78.

2 used in the optical space transmission apparatus according to the present invention
The operation of the shaft actuator will be described. First of all
When the lens barrel holding member 14 is set to a predetermined position, the light emitting element 5 of the light emitting portion 52a of the first sensor 52 is correspondingly set.
8. The light receiving element 64 of the light receiving portion 52b is arranged so as to properly face each other. When the gimbal 16 is set at a predetermined position, the second sensor 66
The light emitting element 72 of the light emitting section 66a and the light receiving element 78 of the light receiving section 66b are arranged so as to face each other correctly. In the present embodiment, the light receiving range of the light receiving element 64 of the first sensor 52 is set within a range of about 5 ° to the left and right with respect to the axis of the light emitting element 58. Also in the second sensor 66, a similar light receiving range is set with respect to the axis of the light emitting element 72 of the second sensor 66. Although not shown in the drawing, the signals of the face-to-face position deviations of the light emitting element 58 and the light receiving element 64 of the first sensor 52 and the light emitting element 72 and the light receiving element 78 of the second sensor 66 within the light receiving range are respectively transmitted via the control circuit. The lead wires 35 are transmitted to the first actuators 22 and 24 and the second actuators 44 and 46, respectively, as drive sources of the actuators, and servo-locked so as to hold any face-to-face positional deviation set in control.

Next, during operation of the optical space transmission device, due to displacement of the frame F and the like, the gimbal 16 moves the yawing Y
When displaced in the direction, the two-dimensional position detecting element 19 is displaced because the first and second sensors 52 and 66 are switched to the two-dimensional position detecting element 19 during operation. The signal of the displacement change is transmitted to the second actuators 44 and 46 through a circuit (not shown) separately provided, and when the actuators 44 and 46 are swung in the yawing Y direction by a predetermined angle, these actuators are moved. Four
The gimbal 16 connected to 4, 46 is also displaced in the same direction, and acts to return the gimbal 16 to its original position. With the displacement of the gimbal 16 in the yawing Y direction, the lens barrel holding member 14 can also be displaced in the same direction along with the first actuator. When the second actuators 44 and 46 are displaced in the yawing Y direction, the balancer 40 of the first actuator 22 can move horizontally within the hole 41 provided in the outer frame 21b.
Further, the displacement of the lens barrel holding member 14 in the pitching direction operates according to the same principle.

As shown in FIGS. 5 and 6, the transmitter 2 and the receiver 3 installed face-to-face with each other are provided with the biaxial actuator according to the present invention, whereby the transmitter 2 and the receiver 3 are pitched. P or yawing Y can be oscillated, and the first actuators 22, 24, the second actuator
2-axis automatic control by actuators 44 and 46
Fine adjustment of the optical axis deviation can be reliably performed. Further, in this embodiment, since the lens barrel pressing member 14 and the gimbal 16 are formed in a cylindrical shape, the rigidity against twisting is improved, and two rocking actuators 22, 2 are provided in the arrow directions P and Y, respectively.
Twisting at the time of rotation is prevented by configuring 24 and 44, 46 coaxially in parallel connection. The present invention is not limited to the above embodiment, but can be implemented in other modes by making appropriate design changes.

[0016]

As is apparent from the above description, in the optical space transmission device provided with the biaxial actuator of the present invention, the mirror for fixing the optical mechanism having the lens inside the transmitter and the receiver. A barrel holding member is provided, the barrel holding member is fixed inside, and a gimbal that is rotatably supported in the yawing direction is formed into a cylindrical shape. The barrel holding member is rotatable in the pitching direction. A pair of first actuators and a pair of second actuators that allow the gimbal to rotate in the yawing direction, and the first or second actuator is provided on the same vertical and horizontal axis of the lens barrel holding member and the gimbal. Two units are provided in parallel, facing each other, and a sensor is provided as a position detecting device for the lens barrel holding member and the gimbal, and the light emitting unit and the light receiving unit facing the sensor are operated. By finely adjusting the positions of the lens barrel holding member and the gimbal to arbitrary positions, the initial optical axis setting, which is a problem of the prior art, is effectively solved, and the optical axis of the optical transmission signal can be positioned freely. The operation is automated and its fine adjustment is easy. Further, since the lens barrel holding member and the gimbal are formed in a cylindrical shape, the rigidity against twisting is improved, and the light emitting element of the sensor and the light receiving state are not disturbed in advance. During operation, the two-dimensional position detection element detects an optical axis shift due to disturbance or the like and returns the biaxial actuator to the original position, which has the effect of increasing the deterrent against disturbance and the installation location. It is possible to eliminate the influence of changes caused by external vibration, wind, heat, etc. that occur in relation to the environment.

[Brief description of drawings]

FIG. 1 is a front sectional view of a biaxial actuator of an optical space transmission device of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a schematic configuration diagram of first and second actuators.

FIG. 4 is a parallel connection diagram of actuators.

FIG. 5 is a pitching adjustment state diagram of the optical space transmission device.

FIG. 6 is a yawing adjustment state diagram of the optical space transmission device.

FIG. 7 is an explanatory view of the principle of an optical space transmission device.

FIG. 8 is an explanatory diagram for regulating the light receiving range of the light emitting element and the light receiving element.

FIG. 9: A of FIG. 10 of a conventional movable wire wheel actuator
-A 'is a sectional view taken along the line A'.

FIG. 10 is a sectional view taken along the line BB ′ in FIG. 9.

FIG. 11 is a cross-sectional view of a conventional movable magnet actuator taken along the line CC ′ of FIG. 12.

FIG. 12 is a cross-sectional view taken along the line DD ′ of FIG. 11.

[Explanation of symbols]

 b optical transmission signal 1 optical space transmission device 2 transmitter 3 receiver 6 lens 7 lens 8 lens 9 lens 13 optical mechanism 14 lens barrel holding member 16 gimbal 17 beam splitter 18 first actuator rotation axis 19 two-dimensional position detection element 20 Rotating Shaft of First Actuator 22,24 First Actuator 23a Upper Frame 23b Lower Frame 28 Back Yoke 30 Yoke 36 Hub 44,46 Second Actuator 52 First Sensor 56 Supporting Stand 57 Pitching Bracket 58 Light Emitting Element 60 Supporting Arm 64 Light receiving element (position detecting element) 66 Second sensor 68 Support base 70 Pedestal 72 Light emitting element 76 Support arm 78 Light receiving element (position detecting element)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical indication location H04B 10/10 10/22 (72) Inventor Koji Suzuki 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo No. Sony Corporation (72) Inventor Terachi Teruuchi 110-1 Shinkushita Nitta, Iruma City, Saitama Prefecture Copal Electronics Co., Ltd. (72) Toshiya Uchida 110-1 Shinkushita, Iruma City, Saitama Prefecture Copal Electronics Co., Ltd. (72) Inventor Iwao Sugisaki 110-1 Shinkushita Nitta, Iruma City, Saitama Prefecture Copal Electronics Co., Ltd. (56) Reference JP-A-61-236227 (JP, A) JP-A-4- 364616 (JP, A) JP-A-3-152490 (JP, A) Actually developed 63-185384 (JP, U)

Claims (4)

[Claims] 1. An optical space transmission system comprising a transmitter for optically modulating an input signal and transmitting the optical transmission signal through a lens, and a receiver for detecting and demodulating the optical transmission signal through the lens, A lens barrel holding member for fixing the transmitting and receiving optical mechanism having the lens provided therein, and a gimbal which is formed in a cylindrical shape and accommodates the lens barrel holding member inside and which is rotatably supported in the yawing direction. A pair of first actuators that allow the lens barrel holding member to swing in the pitching direction with respect to the gimbal, a pair of second actuators that allow the gimbal to swing in the yawing direction, and a pitching position of the lens barrel holding member. And a second sensor for detecting the yawing position of the gimbal, and a two-axis actuator for positioning the optical axis of the optical transmission signal. An optical space transmission device provided with. 2. The first actuator that allows the lens barrel holding member to swing in the pitching direction is a movable coil actuator, and the second actuator that allows the gimbal to swing in the yawing direction. Is an optical space transmission device provided with a biaxial actuator which is a movable magnet type actuator. 3. The first sensor for detecting the position of the lens barrel pressing member in the pitching direction faces a light receiving element arranged on a support arm attached to a yoke of the first actuator, and faces the light receiving element. The second sensor for detecting the position of the gimbal in the yawing direction is the vertical support arm fixed to the gimbal. An optical space transmission device, in which a biaxial actuator including a light receiving element provided and a light emitting element provided on a support of a pedestal provided on a lower frame so as to face the light receiving element is provided. 4. The optical space according to claim 1, wherein the first and second actuators are two-axis actuators provided by parallelly connecting two parallel actuators facing each other on the same vertical and horizontal axis of the gimbal. Transmission equipment.