JPH0587571A - Shaking type laser - Google Patents

Abstract

PURPOSE:To easily and visually confirm the projection of beam by providing a mechanism reciprocally shaking the irradiation direction of the laser beam emitted from a laser body within a predetermined range. CONSTITUTION:A reciporocally shaking mechanism 2 is arranged on the light path of the laser beam L emitted from a laser beam emitting unit 1 and provided with a pentaprism 21 and a reciprocally driving means 22. The driving means 22 consists of a motor 221 and a shaking angle control means 222. The control circuit 222e of a control means 222 reflects the rotary direction of the motor 221 at each time when the light paths of photointerruptors 222c, 222d are cut off by a shading plate 222b. For example, when the shaking axes of the unit 1 and the pentaprism 21 are arranged so as to become horizontal and reciprocally shaken over the shaking range theta set by the photointerruptors 222c, 222d, the projection of laser beam L on an object reciprocates between points A, B. That is, since the undispersed laser beam L is emitted, the projection of the beam L becomes well to see.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oscillating laser used for leveling and positioning in civil engineering, construction, etc.

[0002]

2. Description of the Related Art Conventionally, in civil engineering and construction, for example, as shown in FIG. 7, a line projection in which a laser beam L emitted from a laser body 11 is fan-shaped dispersed by a cylindrical lens 30 and projected onto an object G. Type laser 100
There is a case where the level is set and the position is set by using.

For example, as shown in FIG. 8, a laser beam L emitted from a laser body 11 is redirected by an optical element 21 at a right angle, and the incident light is directed by a motor 40 which rotates the optical element 21 in one direction, for example. 9 (a) or 9 (b) by rotating in a fixed direction around the axis L1.
As shown in, the leveling or positioning may be performed by using the rotary laser 200 that rotates the laser beam L in one direction and projects it on the object G.

[0004]

Line projection type laser 1
In the case of 00, since the laser beam L is fan-shaped dispersed, the energy of the laser beam L projected on each point on the object G is small, and when the distance between the laser and the object G is large, the object G is large. It is often difficult to see the light above.

In the case of the rotary laser 200, since the laser beam L is not dispersed, it is possible to visually recognize the laser beam L projected on the object G which is farther than in the case where the line projection type laser 100 is used. However, even in this case, when the distance between the laser 200 and the object G is 20 m or more, the projection of the laser beam L often becomes invisible and becomes more difficult when the surroundings are bright.

When the surroundings are bright, it is possible to detect the laser beam by using a photodetector that detects the light of the wavelength of the laser beam L. However, the position of the photodetector should be aligned with the detection position. Since it takes time and there is a detection error of the photo detector, the accuracy and convenience are inferior as compared with the case where the positioning is visually performed.

It is an object of the present invention to provide a laser in which the projection of a laser beam is easier to see even if the distance between the laser and the object is longer than in the prior art or the surroundings of the object are bright. It is in.

[0008]

In order to achieve the above object, the invention described in claim 1 is emitted from a laser main body 11 as shown in, for example, FIGS. 1 (a) to 1 (c). A reciprocating rocking mechanism 2 for rocking the irradiation direction D of the laser beam L within a predetermined range is provided.

In order to achieve the above object, the invention according to claim 2 is the same as the invention according to claim 1, in which the reciprocating rocking is performed as shown in, for example, FIG. 1 (a) or 1 (b). The mechanism 2 uses a laser beam L emitted from the laser body 1.
Is arranged on the optical path of so as to be swingable around the incident optical axis L1,
An optical element 21 that redirects incident light in a right-angle direction and emits the light.
And a reciprocating drive means 22 for reciprocally driving the optical element 21 around the incident optical axis L1.

In order to achieve the above object, the invention according to claim 3 is the same as the invention according to claim 1, in which the reciprocating rocking mechanism 2 includes a laser body 1 as shown in FIG. 1C, for example.
The laser beam emitting unit 1 including the optical system 1 and the optical system 12 is configured to reciprocally swing within a predetermined range.

[0011]

[Operation] When the irradiation direction D of the laser beam emitted from the laser main body is reciprocally rocked within a predetermined range, each point of the object is continuously scanned with the converged laser beam having a high energy density. Therefore, the laser beam is more concentrated and projected within the swing range than the rotary laser, and the energy of the laser beam projected to each point of the object becomes larger.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 2, an oscillating laser according to an embodiment of the present invention comprises a laser body 11 made of, for example, a semiconductor laser and an optical system arranged on the optical path of a laser beam L emitted from the laser body. And a reciprocating oscillating mechanism 2 that reciprocally oscillates the irradiation direction D of the laser beam L emitted from the laser body 11 within a predetermined range.

The reciprocating swing mechanism 2 is swingably arranged around the incident optical axis L1 on the optical path of the laser beam L emitted from the laser beam emitting unit 1 and redirects the incident light in a right angle direction. A pentaprism 21 as an optical element for emitting light, and an optical axis of a laser beam L emitted from the laser beam emitting unit 1, that is, the pentaprism 21 and the laser beam emitting unit 1 around the incident optical axis L1 of the pentaprism 21. And a reciprocating drive means 22 for reciprocating.

The reciprocating driving means 22 sets a motor 221 as a reciprocating driving device for oscillating and driving the laser beam emitting unit 1 and the pentaprism 21, and a reciprocating oscillating angle of the laser beam emitting unit 1 and the pentaprism 21 to be variably set. The swing angle control means 222 is provided.

Swinging the laser beam emitting unit 1 and the pentaprism 21 at the same time is not essential to the present invention, and only the pentaprism 21 may be swung.
In this embodiment, the pentaprism 21 is adjusted depending on the optical distance between the two and the deviation of the optical axis of the laser beam emitting unit 1.
The moving plane of the laser beam L output from the incident optical axis L1
In order to prevent shifting or tilting in the direction,
The laser beam emitting unit 1 and the pentaprism 21 are integrally driven to swing.

The motor 221 is not particularly limited, but a motor such as a servo motor or a stepping motor that rotates in both forward and reverse directions and can accurately control the rotation phase is used.

The swing angle control means 222 forms a light path by a rotary plate 222a that swings in conjunction with the laser beam emitting unit 1 and the pentaprism 21, a light shield plate 222b provided on the rotary plate 222a, and a light shield plate 222b. A pair of photo interrupters 222c and 222d that are cut off and a control circuit 222e are provided.

Each photo interrupter 222c, 222d
Are provided so as to be swingable around the axis of the rotary plate 222a and can be fixed at arbitrary positions on their moving paths.

Further, the control circuit 222e includes a light shielding plate 222.
Each time the optical paths of the photo interrupters 222c and 222d are blocked by b, the rotation direction of the motor 221 is reversed. Therefore, the laser beam emitting unit is provided over the swing range set by the photo interrupters 222c and 222d. 1 and the penta prism 21 are rocked back and forth.

As shown in FIG. 3A, the laser beam emitting unit 1 and the pentaprism 21 are arranged so that the swing axes thereof are horizontal, and the photointerrupters 222c and 222c are provided.
When the laser beam emitting unit 1 and the pentaprism 21 are reciprocally swung over the swing range θ set by 22d, the projection of the laser beam L on the object G is point A and point B.
Since the vehicle makes a round trip to and from the point, it is possible to position on a straight line between the two points AB.

Further, as shown in FIG. 3 (b), each photo interrupter 222 is arranged so that the oscillation axis of the laser beam emitting unit 1 and the pentaprism 21 are vertical.
When the laser beam emitting unit 1 and the pentaprism 21 are reciprocally rocked over the rocking range θ set by c and 222d, the projection of the laser beam L on the object G reciprocates within a predetermined rocking angle. And its swing range θ
You can level within.

Therefore, as shown in FIG. 7, as compared with the case where the laser beam L is dispersed by the cylindrical lens 102 and projected onto the object G, the non-dispersed laser beam L is applied to the object G. Even if G is located far from the laser, and the circumference of the object G is bright, the projection of the laser beam L can be seen well.

Further, as compared with the case where the laser beam L is rotated by 360 ° as shown in FIG. 8 or 9, the ratio of the laser beam L projected between the points A and B increases,
The laser beam L is concentrated and projected between the points A and B2, and the energy of the laser beam projected on each point of the object becomes large. As a result, even if the object G is located far from the laser and the surroundings of the object G are bright, the projection of the laser beam L can be seen well.

In another embodiment of the present invention shown in FIG. 4, the swing angle control means 222 inputs a signal for designating a swing range from an externally provided input device, and a control circuit 222f performs control based on the signal. It is composed of a motor driver 222g whose operation is controlled by the circuit 222f.

The other construction is the same as that of the above-mentioned embodiment, and the swing range of the laser beam emitting unit 1 and the pentaprism 21 controlled by the swing angle control means 222 is given by an external input device. Except for the above, the operation is similar to that of the above-described embodiment, and the same effect as that of the above-described embodiment can be obtained.

In yet another embodiment of the present invention shown in FIG.
The reciprocating drive mechanism means 22 is a motor 22 that rotates in one direction.
4, the cam 223a is rotated, and the cam 223a is rotated.
Is configured to swing the pentaprism 21 via the swing shaft 223b and the gear device 223c.

The size of the swing range of the pentaprism 21 can be changed by changing the positions of the cam follower 223e, the cam 223a and the motor 224 provided on the arm 223d of the swing shaft 223b from the crankshaft center. Also,
The position of the swinging range of the pentaprism 21 is determined by the cam 223a.
Also, it can be changed by moving the motor 3 in the height direction in the figure. 223f is a cam 223a
It is a pressing spring for accurately following the swinging arm 223b.

In this embodiment, the motor 2 rotating in one direction
24 is used, only the pentaprism 21 is swung, and the swing range is controlled purely by a mechanical mechanism. , A similar effect can be obtained.

In another embodiment of the present invention shown in FIG. 6, the reciprocating drive mechanism 22 includes a motor 22 that rotates in one direction.
4, eccentric cam 225a, connecting rod 225b,
It is composed of a crankshaft 225c and a gear device 225d.

In this embodiment, the connecting rod 22
5b and the crank arm 225e of the crank shaft 225c and the connecting point can be changed to change the magnitude of the swing angle, and the position of the swing range can be changed by changing the positions of the motor 3 and the eccentric cam 225a. can do.

Other constitutions, operations and effects of this embodiment are the same as those of the previous example, and therefore their explanations are omitted to avoid duplication.

[0032]

As described above, the present invention is provided with the reciprocating rocking mechanism for rocking the irradiation direction of the laser beam emitted from the laser body within a predetermined range, so that the irradiation direction of the laser beam is constant. By reciprocally swinging within the range, the laser beam can be concentrated and irradiated within the swinging range. As a result, the energy of the laser beam applied to each point on the target becomes large, and even if the distance between the laser and the target is longer than before or the surroundings of the target are bright, the projection of the laser beam can be viewed. Easier to do.

[Brief description of drawings]

FIG. 1 is a principle diagram of the present invention.

FIG. 2 is a configuration diagram of an embodiment of the present invention.

FIG. 3 is an explanatory view (a) showing a positioning procedure and an explanatory view (b) showing a leveling procedure according to an embodiment of the present invention.

FIG. 4 is a configuration diagram of another embodiment of the present invention.

FIG. 5 is a configuration diagram of another embodiment of the present invention.

FIG. 6 is a configuration diagram of another embodiment of the present invention.

FIG. 7 is a configuration diagram of a conventional line projection laser.

FIG. 8 is a configuration diagram of a rotary laser. by

9 (a) and 9 (b) are explanatory views showing a procedure for position finding by a conventional rotary laser and an illustration (b) showing a procedure for leveling.
Is.

[Explanation of symbols]

 1 Laser Beam Emitting Unit 2 Reciprocating Drive Mechanism 11 Laser Main Body 12 Optical System 21 Penta Prism 22 Reciprocating Driving Means L Laser Beam L1 Incident Optical Axis D Irradiation Direction

Claims (3)

[Claims] 1. An oscillating laser comprising a reciprocating oscillating mechanism for oscillating a laser beam emitted from a laser body in a reciprocating direction within a predetermined range. 2. An optical element in which the reciprocating swing mechanism is swingably arranged around an incident optical axis on an optical path of a laser beam emitted from a laser main body, and redirects the incident light in a right-angle direction and emits it. The swing laser according to claim 1, further comprising: a reciprocating driving unit that reciprocally drives the optical element around an incident optical axis within a predetermined swing range. 3. The oscillating laser according to claim 1, wherein the reciprocating oscillating mechanism is configured to reciprocally oscillate a laser beam emitting unit including a laser body and an optical system within a predetermined range. [0001]