JP3257087B2 - Optical space transmission equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical space transmission apparatus for transmitting and receiving optical information by a laser beam through a space, and more particularly to a support mechanism for a lens barrel.

[0002]

2. Description of the Related Art Conventionally, there is an optical space transmission apparatus shown in FIGS. 4 and 5 for transmitting and receiving optical information by a laser beam through a space such as a rooftop of a building.

[0003] The optical space transmission device is integrally connected to the optical science block 2 to input and output lens is the diameter of the built-in barrel 1 of the laser beam is smaller base end 1b side, optical science Bed <br Inside the lock 2, a light emitting element 3, such as an LD, a light receiving element 4, such as a PD, a position detector 5, such as a PSD, and three lenses 6, 7, 8
And an opposing branch optical element 9 and the like.

[0004] The lens barrel 1 is installed so as to be rotatable in the horizontal and vertical directions about a vertical Y axis and a horizontal X axis which are two axes orthogonal to each other with respect to the mounting base 10.

That is, the square fixed support frame 11 is
The rectangular movable support frame 12 fixed on the
, And the lens barrel 1 is disposed so as to horizontally pass through a central portion in the movable support frame 12. And, a pair of upper and lower vertical shafts 13 and bearings 1 arranged on the Y axis
The movable support frame 12 is rotatably supported by the fixed support frame 11 via 3a. A horizontal drive motor 14 composed of a motor with a speed reducer is mounted on the upper portion of the movable support frame 12, and the horizontal drive motor 14 is attached to the outer periphery of the vertical shaft 13 by the worm 17 and is fixed to the movable support frame 12. By rotating and driving the worm wheel 18,
The movable support frame 12 is configured to be rotatable in the horizontal direction about the Y axis with respect to the fixed support frame 11.

A neck ring 19 , which is a lens barrel support frame , is attached to the outer periphery of the distal end 1a of the lens barrel 1 having a large diameter.
The lens barrel 1 is rotatably supported by the movable support frame 12 via a pair of left and right horizontal shafts 15 and bearings 15a fixed to left and right sides of a neck ring 19 disposed on the shaft. A vertical drive motor 16 constituted by a motor with a speed reducer is attached to one side of the movable support frame 12, and a worm 17 of the vertical drive motor 16 is fixed to the outer periphery of the tip of one horizontal shaft 15 by a worm 17. By rotating the lens, the lens barrel 1 is configured to be rotatable in the vertical direction about the X axis with respect to the movable support frame 12.

Therefore, the horizontal drive motor 14 and the vertical drive motor 16 are configured so that the optical axis F of the lens barrel 1 can be rotated by 360 ° with respect to the base 10 about two axes of the Y axis and the X axis. I have.

The optical space transmission apparatus emits a laser beam generated by the light emitting element 3 of the optical block 2 into the lens barrel 1 through the lens 6 and the opposing branch optical element 9,
The laser beam is emitted along the optical axis F by the input / output lens in the lens barrel 1 toward the optical space transmission device on the other side.

On the other hand, a laser beam emitted from the optical transmission device on the other side is received by the light receiving element 4 through the input / output lens, the opposing branch optical element 9 and the lens 8 in the lens barrel 1, and the optical information is transmitted and received. Is performed.

At this time, a part of the laser beam emitted from the optical space transmission device on the other side is received by the position detector 5 through the opposing branch optical element 9 and the lens 8, and the mutual light is transmitted by the position detector 5. The displacement of the optical axis F of the spatial transmission device is detected.

Accordingly, the optical axis F of the lens barrel 1 is moved by the horizontal drive motor 14 and the vertical drive motor 16 to the two axes of the Y axis and the X axis.
It is configured to adjust the rotation of the optical axis F by 360 ° around the axis to correct the positional deviation of the optical axis F.

[0012]

By the way, the conventional optical space transmission apparatus has a pair of vertical shafts 13 and a pair of vertical shafts 13 for the purpose of reducing the amount of deflection of the tip 1a of the lens barrel 1 when the lens barrel 1 is rotated by 360 °. X-axis and Y as support points by horizontal axis 15
The intersection point O of the shaft is deviated toward the tip 1a of the lens barrel 1.

Accordingly, since the position G of the center of gravity of the lens barrel 1 to which the optical block 2 is integrally connected is greatly displaced from the intersection O by the distance K, the load inertia moment when the lens barrel 1 is rotated by 360 ° is adjusted. Horizontal drive motor 1
4 and the vertical drive motor 15 must use a large capacity motor. Also, since the moment for rotating the lens barrel 1 is large due to the linear motion components in the X-axis, Y-axis, and optical-axis F directions due to disturbances, external element parts such as brakes must be provided, which significantly increases the cost. Therefore, the lens barrel 1
There is a problem that the rotation adjustment with high response is disadvantageous.

Note that the load inertia moment I of the lens barrel 1 of the conventional optical space transmission device is I = Ij + MK ² (where I = Ij + MK ² )
j is the moment of inertia around the center of gravity, M is the mass, and K is the intersection O
And the distance between the center of gravity G and the X axis due to disturbance.
A moment M for rotating the lens barrel 1 by a linear motion component in the Y axis and optical axis F directions is M = KF (where F is a linear motion component force).

SUMMARY OF THE INVENTION The present invention has been made to solve the above problem, and has a weight of a lens barrel for reducing a load inertia moment during rotation adjustment of the lens barrel.
It is an object of the present invention to provide an optical space transmission device in which the center position adjusting means can be compactly configured .

[0016]

Means for Solving the Problems An optical space transmission apparatus according to claim 1 of the present invention for achieving the above object, on a base
A fixed fixed support frame, and the fixed support frame
Movable support frame, and a lens barrel support disposed in the movable support frame.
The holding frame was inserted and attached inside the barrel support frame.
Between and above the lens barrel, the fixed support frame and the movable support frame.
It is arranged between the movable support frame and the lens barrel support frame, and
The barrel is integrated with the barrel support frame and
Horizontal axis supporting 360 ° rotatable around two intersecting axes
And the vertical axis, the movable support frame and the lens barrel support frame
A horizontal drive mode that rotates around the flat axis and the vertical axis.
And a vertical drive motor, wherein the lens barrel is moved and adjusted in the optical axis direction within the lens barrel support frame.
The lens barrel can be attached freely, and the lens barrel can be
By adjusting the movement in the axial direction, the center of gravity of
A center-of-gravity position adjusting means is set at the intersection of two orthogonal axes.
It is a thing. Also, a book to achieve the above purpose
The optical space transmission apparatus according to claim 2 of the present invention is fixed on a base.
Fixed support frame, and movable set in the fixed support frame
A support frame and a lens barrel support frame disposed in the movable support frame
And a lens barrel inserted and mounted in the lens barrel support frame
Between the fixed support frame and the movable support frame, and
The mirror is disposed between a moving support frame and the lens barrel support frame.
The tube is perpendicular to the base integrally with the barrel support frame.
A horizontal axis rotatably supporting 360 ° around two axes;
The vertical axis, the movable support frame and the lens barrel support frame
And a horizontal drive motor that rotates around the vertical axis.
And an optical space transmission device having a vertical drive motor,
It is inserted around the outer periphery of the lens barrel and can be moved and adjusted in the optical axis direction.
It has a ring-shaped balancer attached,
Moving and adjusting the sensor in the direction of the optical axis around the outer periphery of the lens barrel.
The center of gravity of the lens barrel at the intersection of the two orthogonal axes.
It is provided with a center-of-gravity position adjusting means for determining. On this occasion,
According to a third aspect of the present invention, there is provided an optical space transmission apparatus, comprising:
Moveable and adjustable in the optical axis direction on the outer circumference of the tip with a large aperture
A ring-shaped balancer with a large caliber attached,
Adjustable in the optical axis direction to the outer periphery of the base end where the diameter of the lens barrel is small.
A ring-shaped balun with a small diameter that is attached freely
It is preferable to provide a sir .

[0017]

According to the optical space transmission apparatus of the first aspect of the present invention, the lens barrel is moved in the optical axis direction within the lens barrel support frame.
It has a center-of-gravity position adjustment means for adjusting
The lens barrel can be moved and adjusted in the optical axis direction within the barrel support frame.
Can be set with high accuracy at the intersection of two axes orthogonal to each other.
it can. Nevertheless, the means for adjusting the position of the center of gravity is
Can be housed compactly. Also,
The optical space transmission apparatus according to claim 2 of the present invention,
It is inserted around the outer periphery of the lens barrel and can be moved and adjusted in the optical axis direction.
Center of gravity alignment with attached ring-shaped balancer
Means, so that the balancer is
By adjusting the movement in the direction, the center of gravity of the lens barrel becomes orthogonal
It is possible to set the intersection of two axes with high accuracy. That's it
The center-of-gravity adjustment means is housed compactly around the outer periphery of the lens barrel
can do. In addition, the present invention configured as described above
In the optical space transmission apparatus according to the third aspect of the present invention, the diameter of the lens barrel is large.
Attached to the outer circumference of the tip to be movable and adjustable in the optical axis direction
A ring-shaped balancer with a large diameter and a small-diameter barrel
On the outer periphery of the base end so that it can be moved and adjusted in the optical axis direction.
With a small ring-shaped balancer
The optical block is attached to the base end of the lens barrel
The optical space transmission device in which the center of gravity of the lens barrel tends to deviate toward the base end
The balancer with a large caliber and a small caliber
By utilizing the weight difference with the lancer, these balancers
By simply making fine adjustments in the optical axis direction, the center of gravity of the lens barrel can be adjusted.
Can be adjusted.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of an optical space transmission apparatus to which the present invention is applied will be described below with reference to FIGS. 4 and 5 are denoted by the same reference numerals, and description thereof will not be repeated.

First, as shown in FIG. 1 and FIG. 2, the optical space transmission apparatus of the present invention
A pair of upper and lower horizontal drive motors 41 composed of flat brushless motors are provided between the fixed support frame 11 and the movable support frame 12, and the neck ring 1
A pair of left and right vertical drive motors 42 composed of flat brushless motors are provided between the movable support frame 9 and the movable support frame 12.

That is, the two horizontal drive motors 41 are composed of a magnet disk 43 fixed to the movable support frame 12 on the outer periphery of both vertical shafts 13, a plurality of flat coils 44 fixed to the fixed support frame 11, and a yoke. It is constituted by a disk 45. The two vertical drive motors 42 are connected to the neck ring 19.
, The two horizontal shafts 15 fixed to both left and right sides, a yoke disk 46 fixed to the ends thereof, a magnet disk 43 fixed to the yoke disk 46, and a plurality of fixed to the movable support frame 12. And a yoke disk 45.

Note that the two horizontal drive motors 41 and the two vertical drive motors 42 constituted by the flat brushless motors are used.
The mounting base 10 is similar to a horizontal drive motor 14 and a vertical drive motor 16 configured by a conventional motor with a reduction gear.
It is difficult for the vibration and tilt of the lens barrel to be directly transmitted to the lens barrel 1, so that the 360 ° rotation adjustment operation of the lens barrel 1 can be easily performed.

Next, as shown in FIGS. 1 to 3, the optical space transmission device according to the present invention includes a neck ring 1 serving as a lens barrel support member.
9, the center of gravity G of the lens barrel 1 to which the optical block 2 is connected so as to support the center of gravity G of the lens barrel 1
High precision at the intersection O between the X axis and the Y axis, which is the 60 ° rotation center position
It is set at the time.

Accordingly, the optical space transmission apparatus according to the present invention is designed such that when the lens barrel 1 is rotated 360 ° about two axes of the X axis and the Y axis by the two horizontal drive motors 41 and the vertical drive motor 42, Since the rotation of the lens barrel 1 is adjusted around the center of gravity G, the load inertia moment of the lens barrel 1 can be significantly reduced.

[0024] That is, the moment of inertia I is because a K = 0, is smaller than the MK only ² minutes prior. Further, the moment M for rotating the lens barrel 1 is also reduced by the linear motion components in the X-axis, Y-axis, and optical-axis F directions due to disturbance. That is,
M = KF (where F is the linear motion component force) is K = 0, M
= 0.

Therefore, according to the optical space transmission apparatus of the present invention, the lens barrel 1 can be easily rotated by 360 ° with a small driving force, and the two horizontal drive motors 41 and the two vertical drive motors 4 can be adjusted.
2 can be constituted by a small-capacity motor such as a flat brushless motor, and external components such as a brake can be eliminated. In addition, the lens barrel 1 is determined by the linear motion
Since the moment for rotating the lens barrel can be reduced, the rotation of the lens barrel 1 can be adjusted with high response.

Next, as shown in FIGS. 1 to 3, the optical space transmission apparatus of the present invention, easily gravity center position G of the lens barrel 1 on the intersection point O, and, in order to set with high precision Is provided.

Then, as shown in FIG. 1 and FIG.
The center-of-gravity position adjusting means 21 of the lens barrel 1
Are mounted so as to be movable and adjustable in the directions of arrows a and b, which are the directions of the optical axis F.

At this time, the guide pin 22 fixed to the upper end of the outer periphery of the lens barrel 1 is slid in the directions of arrows a and b in the guide groove 23 formed at the upper end of the inner periphery of the neck ring 19 and parallel to the optical axis F. A pair of tightening screws 24 attached to the outer periphery of the lens barrel 1 on the right and left sides of the guide pin 22 are freely fitted.
9 is provided so as to penetrate through a pair of guide grooves 25 parallel to the optical axis F formed so as to penetrate the inner and outer peripheries.

Then, the two tightening screws 24 are loosened and the lens barrel 1
Is moved and adjusted in the directions of the arrows a and b in the neck ring 19 while guiding the guide tube 23 in the guide groove 23, so that the center of gravity G of the lens barrel 1 can be set to the intersection O with high accuracy. is there. After the adjustment, the two tightening screws 24
To fix the lens barrel 1 to the neck ring 19.

Next, as shown in FIGS. 1 and 3, the second center-of-gravity position adjusting means 31 is provided with a tip 1 having a large diameter of the lens barrel 1.
phosphoric <br/> grayed-shaped balancer 32 having a large diameter on the outer circumference of a and diameter is smaller base end 1b, the diameter is small annular roses
The sensor 33 is attached.

At this time, the second center-of-gravity position adjusting means 31 shown in FIG. 1 forms screws 34, 35 on the outer periphery of the distal end 1a and the proximal end 1b of the lens barrel 1, and connects the two balancers 32, 33 to both ends. Screws 34 and 35 are screwed together, and by adjusting the rotation of both balancers 32 and 33, these two balancers 32 and 33 are screwed in the directions of arrows a and b, which are the directions of the optical axis F. The position of the center of gravity G of the lens barrel 1 with respect to the intersection O is finely adjusted. After the adjustment, the set screws 36 penetrating through the balancers 32 and 33 are tightened, or the balancers 32 and 33 are fixed to the lens barrel 1 with an adhesive or the like.

Next, in the second center-of-gravity position adjusting means 31 shown in FIG. 3, both balancers 32 and 33 are inserted into the outer circumference of the distal end 1a and the proximal end 1b of the lens barrel 1 so as to be able to be inserted and removed from the directions of arrows a and b. By finely adjusting the position G of the center of gravity of the lens barrel 1 with respect to the intersection O by adjusting the insertion positions and / or the number of insertion of the balancers 32 and 33 on the outer periphery of the distal end 1a and the proximal end 1b. After the adjustment, the balancers 32 and 33 are similarly fixed to the lens barrel 1 with a set screw 36 or an adhesive.

[0033] Thus, the optical space transmission apparatus of the present invention is thus connector, cable, even if there is instability, the first and second center-of-gravity position adjustment means 21,3 1 to the load moment of inertia such as a screw The center of gravity G of the lens barrel 1 can be set at the intersection O with high accuracy , and the operation of adjusting the center of gravity at that time can be performed quickly and easily. That is, the lens barrel
The optical block 2 is attached to the base end 1 b side of the optical block 1.
The center of gravity G of the lens barrel 1 is shifted toward the base end 1b.
In view of the above, the distal end 1a of the lens barrel 1 having a large diameter
A balancer 32 with a large diameter and heavy weight is
The lens barrel 1 has a small diameter on the outer circumference of the proximal end 1b.
Now that we have a lighter balancer 33,
Effectively utilizing the weight difference between the two balancers 32, 33,
Each of these balancers 32 and 33 is finely moved in the optical axis direction.
By adjusting, the center of gravity position G of the lens barrel 1 is quickly moved to the intersection O.
It can be adjusted quickly and easily.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made based on the technical concept of the present invention.

[0035]

The optical space transmission apparatus of the present invention configured as described above has the following effects.

In the first aspect, the lens barrel is positioned in the optical axis direction within the lens barrel support frame.
By adjusting the movement of the lens barrel in the
Center of gravity position adjustment that can be set with high accuracy at the intersection of axes
Is provided with the means, that put at 360 ° rotational adjustment of the lens barrel
The load moment of inertia can be reduced. Still, the barrel
Center of gravity adjustment for moving and adjusting the lens in the optical axis direction within the barrel support frame
The means can be housed compactly in the barrel support frame
Therefore, the entire optical space transmission device can be reduced in size, and
The installation space can be reduced.

According to a second aspect, the optical axis is inserted around the outer periphery of the lens barrel.
Ring-shaped balun mounted for movement adjustment in any direction
By moving the lens in the optical axis direction, the center of gravity of the lens barrel can be adjusted.
Can be set to the intersection of two axes orthogonal to each other with high accuracy
Since the center-of-gravity position adjusting means is provided, the lens barrel can be rotated 360 °.
The load inertia moment during settling can be reduced. It
And move the balancer around the outer circumference of the lens barrel in the direction of the optical axis.
Center of gravity adjustment means is housed compactly on the outer periphery of the lens barrel
The size of the entire optical space transmission device can be reduced.
It is possible to reduce the installation space.
You.

According to a third aspect of the present invention, the outside of the distal end of the lens barrel having a large diameter is provided.
Move a ring-shaped balancer with a large diameter around the circumference in the optical axis direction.
The outer periphery of the base end where the lens barrel is small in diameter so that it can be adjusted freely
Move a ring-shaped balancer with a small diameter in the optical axis direction
The optical block is attached so that it can be adjusted freely.
The center of gravity of the lens barrel moves toward the proximal end
In optical space transmission equipment that tends to shift, large diameter
Using the weight difference between the balancer and the smaller
Fine-tune each of these balancers in the optical axis direction.
Just move the center of gravity of the lens barrel to the intersection of two axes orthogonal to each other.
One can be easily set.

[Brief description of the drawings]

FIG. 1 is a partial schematic side view showing an optical space transmission apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1;

FIG. 3 is a partial schematic side view showing a modified example of the free-space optical transmission device of the present invention.

FIG. 4 is a partial schematic side view showing a conventional optical space transmission device.

FIG. 5 is a sectional view taken along the line BB of FIG. 4;

[Explanation of symbols]

1 the diameter of the lens barrel 1a barrel large tip 1b barrel diameter is smaller proximal second optical block 10 mounting base 11 fixed support frame 12 movable supporting frame 13 Nekkurin grayed 21 is a vertical axis 15 horizontal axis 19 barrel supporting frame First gravity center position adjusting means 22 Guide pin 23, 25 Guide groove 24 Tightening screw 31 Second gravity center position adjusting means 32 Balancer with large diameter 33 Balancer with small diameter 41 Horizontal drive motor 42 Vertical drive motor X-axis Vertical rotation center axis Y axis Horizontal rotation center axis O of the lens barrel Intersection of two axes of X axis and Y axis G Center of gravity position of lens barrel

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) H04B 10/00-10/28 H04J 14/00-14/08 G02B 7/00 G02B 23/00

Claims (3)

(57) [Claims] 1. A fixed support frame fixed on a base, a movable support frame disposed in the fixed support frame, a lens barrel support frame disposed in the movable support frame, and a lens barrel support frame A lens barrel inserted through and mounted between the fixed support frame and the movable support frame and the movable support frame;
The lens barrel is disposed between the holding frame and the lens barrel support frame, and
2 perpendicular to the base integrally with the lens barrel support frame
Horizontal axis and vertical supporting 360 ° rotatable around axis
Axis, the movable support frame and the lens barrel support frame are connected to the horizontal axis and the vertical
Horizontal drive motor and vertical drive that rotate around a straight axis
In the optical space transmission device provided with a motor , the lens barrel can be moved and adjusted in the optical axis direction within the lens barrel support frame.
The lens barrel is attached to the optical axis direction within the lens barrel support frame.
The center of gravity of the lens barrel is adjusted by moving
An optical space transmission apparatus comprising: a center-of-gravity position adjusting means for setting an intersection of two axes that intersect . 2. A fixed support frame fixed on a base, a movable support frame disposed in the fixed support frame, a lens barrel support frame disposed in the movable support frame, and a lens barrel support frame. A lens barrel inserted through and mounted between the fixed support frame and the movable support frame and the movable support frame;
The lens barrel is disposed between the holding frame and the lens barrel support frame, and
2 perpendicular to the base integrally with the lens barrel support frame
Horizontal axis and vertical supporting 360 ° rotatable around axis
Axis, the movable support frame and the lens barrel support frame are connected to the horizontal axis and the vertical
Horizontal drive motor and vertical drive that rotate around a straight axis
In the optical space transmission device provided with a motor, the optical space transmission device is inserted around the outer periphery of the lens barrel so as to be movable and adjustable in the optical axis direction.
It has a ring-shaped balancer attached,
Moving and adjusting the sensor in the direction of the optical axis around the outer periphery of the lens barrel.
The center of gravity of the lens barrel at the intersection of the two orthogonal axes.
An optical space transmission device comprising a center-of-gravity position adjusting means for determining the position of the center of gravity . 3. An optical axis is provided on the outer periphery of the large-diameter end of the lens barrel.
Large-diameter phosphorus
Outside the proximal end of the lens-shaped balancer
Small aperture mounted around the circumference for adjustment in the optical axis direction
The optical space transmission apparatus according to claim 2, further comprising a ring-shaped balancer .