JPH11101642A - Method for horizontal adjustment of beam image, and apparatus for horizontal adjustment of beam image - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adjustment method and an adjustment apparatus which can highly precisely and easily carry out horizontal adjustment of a cylinder beam image emitted from a laser survey apparatus. SOLUTION: Two one-dimensional PSD(position sensitive detector) 72a, 72b are set up in parallel on the optical axis of a converging lens 70 while the measurement direction of the PSD being set vertically. The laser beam, which is horizontally adjusted is made incident as the standard beam on the converging lens 70. The incident positions of the standard beam on the one-dimensional PSD 72a, 72b are set to having horizontal standard height. Then, the cylinder beam L4 is made incident on the converging lens 70 from a laser survey apparatus 11 and the direction of the cylinder axis of a cylindrical lens of the laser survey apparatus 11 is so adjusted as to mutually conform the degrees of the deviations of the incident positions of the cylinder beam L4 upon the one- dimensional PSD 72a, 72b from the horizontal standard height.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for adjusting a beam image by a laser beam emitted from a laser surveying device.

[0002]

2. Description of the Related Art In the fields of civil engineering and construction, in order to mark horizontal and vertical lines, a reference plane is formed by a laser beam or a vertical or horizontal reference line (trajectory) is formed on a surface to be projected. 2. Related Art A laser surveying device for projection (a so-called laser planar) is widely used. As such a laser surveying apparatus, there is a method of forming a reference line by projecting a laser beam (hereinafter, referred to as a cylinder beam) diffused in a fan shape through a cylindrical lens onto a wall surface or the like.

FIG. 16 shows an external view of a conventional laser surveying device. FIG. 16 shows the horizontal laser scanning (inking out).
1 shows a state in which the laser surveying apparatus 11 is used standing upright in order to perform the operation. The cylinder beam L ₄ emitted from the laser surveying device 11 is projected on a wall surface or the like by projecting a cylinder beam image 53 expanded in a horizontal direction by a cylindrical lens incorporated in the laser surveying device 11 to obtain a horizontal reference. Form a line. With this reference line, the worker can mark out the horizontal line.
Also, if it is desired to form a reference line in the entire circumferential direction, by rotating the rotary light projecting unit (not shown), to scan the cylinder beam L _4, which is emitted. Then, over the entire circumference on the wall, as shown in FIG. 16, the locus SL by cylinder beam L ₄ is drawn.

The vertical beam L ₅ and the vertical beam L ₂ emitted from the upper end and the lower end of the laser surveying device 11, respectively.
Have their beam axes coincident with each other and form a reference spot on the ceiling or floor, respectively. These and a straight line connecting the two spots, and the beam axis of the cylinder beam L ₄ forming a reference line, has been designed and adjusted so as to be perpendicular to each other.

[0005] As described above, the reference line in the horizontal direction is to be formed by a cylinder beam image 53 by cylinders beam L _4, which is enlarged in the horizontal direction by the cylindrical lens. Figure 18 is a perspective view showing a state of the laser beam L ₃ passing through the cylindrical lens 37. In the state of FIG. 16, the cylinder lens ls of the cylindrical lens 37 installed in the laser surveying device 11 is oriented in the vertical direction. The cross-sectional shape of the laser beam L ₃ before entering the cylindrical lens 37 is perfectly circular. This laser beam L ₃ is converted into a cylinder beam L ₄ expanded in the horizontal direction (the left-right direction on the paper surface of FIG. 18) by the cylindrical lens 37, and projects an elliptical cylinder beam image 53 on the wall surface. The cylinder beam image 53, which is the reference line, must of course be accurately projected horizontally. That is, the cylinder beam image 53
Must be adjusted so that the heights of both ends P1 and P2 of the floor from the floor surface are equal. Therefore, when incorporating the cylindrical lens 37 into the laser surveying device 11, the cylinder beam L
_An adjustment is made so that the reference line according to ₄ is projected exactly horizontally. Hereinafter, this operation is called horizontal adjustment of the cylinder beam.

The inclination of the cylinder beam image 53 projected on the wall surface, that is, the direction in which the cylinder beam L ₄ is expanded by the cylindrical lens 37 is determined by the direction of the cylinder axis ls of the cylindrical lens 37.
That is, as shown in FIG. 18, in a plane perpendicular to the incident direction of the laser beam L _3, by rotating the cylindrical lens 37 in the direction of a, the cylinder beam image 53 is inclined in the same direction (a 'direction). Therefore, the cylindrical lens 3
The inclination of the cylinder beam image 53 can be adjusted by adjusting the direction of the cylinder axis Is in FIG.

FIG. 19 is a perspective view showing a state of a conventional cylinder beam adjusting operation. Conventional horizontal adjustment of the cylinder beam is performed using the collimating telescope of the total station 120. When looking into the collimating telescope of the total station 120, a horizontal reference line 121 for indicating the horizontal direction and a vertical reference line 122 for indicating the vertical direction are shown in the field of view, as shown in FIG. It is confirmed. The horizontal reference line 121 and the vertical reference line 122 are adjusted with respect to the horizontal and vertical with an accuracy of about 10 seconds.

Then, the laser surveying device 11 and the total station 120 are installed and leveled so that the exit of the cylinder beam of the laser surveying device 11 is within the visual field of the collimating telescope of the total station 120. Then, the cylinder beam L is output from the laser surveying device 11.
Emit ₄

Then, the emitted cylinder beam L
₄ enters the collimating telescope of the total station 120. The operator looking through the collimating telescope, so that the optical axis of the beam axis and collimation telescope cylinder beam L ₄ are identical, adjusting the orientation of the laser surveying instrument 11. Then, as shown in FIG. 20B, the cylinder beam image 53 can be confirmed in the visual field of the collimating telescope. Thereby, the operator can visually check the displacement amount of the cylinder beam image 53 with respect to the horizontal reference line 121. And FIG.
As in (c), viewed as quasi telescope and the horizontal reference line 121 and the cylinder beam image 53 is visible just overlap, plane orthogonal to the cylindrical lens 37 of the laser surveying instrument 11 to the beam axis of the cylinder beam L ₄ Rotate with.
In this way, by using the collimating telescope of the total station 120 is adjusted with high precision, it is possible to perform the leveling of the cylinder beam L ₄ emitted from the laser surveying instrument 11.

[0010]

SUMMARY OF THE INVENTION The laser surveying device 11
In order to project the reference line with high accuracy, the cylinder beam L
_FourNeeds to be adjusted with an accuracy of about one minute. Only
However, as described above, the total station 120
In the method using the collimating telescope of
Room L_Four1 minute minute angle for horizontal adjustment
It is very difficult to detect the difference. Also,
The beam beam image 53 has a certain width in the vertical direction.
Therefore, the center of the cylinder beam image 53 is accurately recognized.
It is also difficult to do. Furthermore, the total station 120
Adjustment errors and optical errors of the collimating telescope
Beam L_FourTo affect the horizontal adjustment of the
There is a problem that the adjustment accuracy of the device is deteriorated.

Further, the conventional adjustment method requires two operators, an observer who observes the collimating telescope, and an adjuster who rotates the cylindrical lens 37 to adjust the inclination of the cylinder beam image 53. there were. In addition, since the observer and the coordinator are not the same, there is a problem that the efficiency in performing the adjustment is low.

Accordingly, the present invention provides an adjustment method capable of accurately and easily performing horizontal adjustment of a cylinder beam emitted from a laser surveying instrument.
Make it an issue. Another object of the present invention is to provide a beam image horizontal adjustment device capable of performing such horizontal adjustment of a cylinder beam.

[0013]

The present invention has the following features to attain the object mentioned above. That is, the invention of claim 1 is a method for horizontal adjustment of a beam image in a laser surveying apparatus that rotates a light projecting unit that emits laser light expanded in one direction and scans the laser light in a predetermined plane. The first and second light position detection elements provided side by side in the direction of the scanning surface to detect the incident position of light in a direction substantially orthogonal to the scanning surface, the laser light is simultaneously incident, The laser light so that a straight line connecting an incident position of the laser light to the first optical position detecting element and an incident position of the laser light to the second optical position detecting element is parallel to the scanning surface. Is characterized by adjusting the enlargement direction.

According to such a horizontal adjustment method of the beam image, the deviation from the parallel direction of the image enlargement by the laser light with respect to the scanning surface of the laser light emitted from the laser surveying device is detected by the light position detecting element. Since the detection can be performed, the horizontal adjustment of the beam image can be performed with higher accuracy than before. Further, since the horizontal adjustment of the beam image can be performed while confirming the deviation of the beam image from the horizontal, the adjustment can be performed more efficiently than in the related art.

Here, the laser light may be expanded in one direction by transmitting through a cylindrical lens. Further, as the photodetecting element, specifically, 1
Dimensional position-sensitive detectors can be used.

According to a second aspect of the present invention, in the method for horizontal adjustment of a beam image according to the first aspect, a reference laser beam converged in a spot shape is scanned in a plane parallel to the scanning plane, and substantially parallel to the scanning plane. After detecting the incident position of light in the orthogonal direction, the first and second light position detection elements provided side by side in the direction of the scanning surface, after the reference laser light is incident,
The laser light to be adjusted expanded in one direction is incident on the first and second optical position detecting elements in a stationary state, and the laser light from the incident position of the reference laser light on the first optical position detecting element is The laser so that the distance to the incident position of the adjustment target laser light and the distance from the incident position of the reference laser light to the second optical position detection element to the incident position of the adjustment target laser light are equal to each other. It is specified by adjusting the direction of light expansion.

According to a third aspect of the present invention, in the method for horizontal adjustment of a beam image according to the second aspect, the reference laser beam is scanned by a calibration laser surveying device separate from a laser surveying device scanning the laser beam to be adjusted. It is specified by having

According to a fourth aspect of the present invention, there is provided the beam image horizontal adjusting method according to any one of the first to third aspects, wherein the first and second optical position detecting elements are one-dimensional position-sensitive detectors. It is specified by that.

According to a fifth aspect of the present invention, there is provided a laser surveying apparatus which rotates a light projecting unit for emitting a laser beam enlarged in one direction and scans the laser beam in a predetermined plane. A light-shielding member having first and second slits oriented in a direction substantially orthogonal to the scanning surface formed in parallel, and the light-receiving surface is covered by any one of the slits. Irradiating the laser light to a light position detecting element for detecting an incident position of light incident into the laser light, and the laser light incident on the light receiving surface through the second slit in a state where the first slit is closed. Detecting the incident position of the laser light incident on the light receiving surface through the first slit in a state where the second slit is closed, and detecting the incident position of the laser light through the first slit. Enlargement direction of the laser light such that a straight line connecting the incident position of the laser light incident on the light surface and the incident position of the laser light incident on the light receiving surface through the second slit is parallel to the scanning surface. Is adjusted.

That is, when this configuration is used, the incident position of the laser light incident through the first slit on the light position detecting element and the incident position of the laser light incident through the second slit on the light position detecting element , It is possible to detect the deviation of the laser light from the scanning surface in the enlargement direction.

When this configuration is adopted, it is preferable that the light position detecting element is a two-dimensional position-sensitive detector. Further, the laser light may be one that is enlarged in one direction by a cylindrical lens.

According to a sixth aspect of the present invention, in the beam image horizontal adjusting method according to the fifth aspect, the light position detecting element is specified as a two-dimensional position-sensitive detector.

According to a seventh aspect of the present invention, in the method of any one of the first to sixth aspects, the beam image is horizontally adjusted by specifying that the laser beam is enlarged in one direction by a cylindrical lens. It was done.

According to an eighth aspect of the present invention, in the method of any one of the first to seventh aspects, it is preferable that the laser light is simultaneously applied to the first and second photodetectors in a stationary state. It is specified by making it incident.

[0025] According to the ninth aspect of the present invention, the first aspect of the present invention is provided.
A beam image leveling device used in the beam image leveling method according to any one of claims 4 to 6, wherein the converging lens and the optical axis in a plane orthogonal to the optical axis of the converging lens. There is provided a beam image horizontal adjustment device, comprising: the first and second light position detection elements arranged side by side in parallel with respect to an orthogonal symmetry axis.

According to a tenth aspect of the present invention, in the ninth aspect of the present invention, the first and second photodetectors have one beam detector.
Dimensional position-sensitive detector.

According to an eleventh aspect of the present invention, there is provided a beam image leveling apparatus used in the beam image leveling method according to the fifth or sixth aspect, wherein the condensing lens and the condensing lens are provided. A beam image horizontal adjustment device comprising: a light position detecting element disposed on a plane orthogonal to the optical axis on the optical axis of the lens.

According to a twelfth aspect of the present invention, in the beam image horizontal adjusting apparatus according to the eleventh aspect, the light position detecting element is specified as a two-dimensional position-sensitive detector.

[0029]

Embodiments of the present invention will be described below with reference to the drawings. (I) Laser Surveying Apparatus Before describing the beam image horizontal adjusting method and the beam image horizontal adjusting apparatus according to the present embodiment, a laser surveying apparatus to be adjusted will be described.

FIG. 12 is a sectional view showing the configuration of a laser surveying apparatus to which the cylinder beam horizontal adjusting method according to the present invention is applied. FIG. 13 shows a rotary projection unit that emits a cylinder beam in the laser surveying device 11.
13A is a cross-sectional view, FIG. 13B is a top view as viewed from a direction A in FIG. 13A, and FIG. 13C is a front view as viewed from a direction B in FIG. 13A. FIGS. 12 and 13 show a state where the laser surveying device is set up in the vertical direction in order to perform laser beam scanning in the horizontal direction.

As shown in FIG. 12, the laser surveying device 11
The main body housing 12 has a substantially cylindrical shape, a light projecting device 13 housed in the main body housing 12 with its rotary light projecting portion 15 protruding from an upper end surface 12 b of the main body housing 12, It comprises an upper housing 16 surrounding the rotary light projecting section 15 of the device 13 and a battery case 17 provided at the bottom of the main body housing 12 for accommodating a driving battery of the light projecting device 13.

[Main Body Housing] On the upper end surface 12b of the substantially cylindrical main body housing 12, a mortar-shaped sliding guide portion 19 is formed coaxially with its central axis. A circular sliding hole 19a is formed on the bottom surface of the sliding guide portion 19 coaxially with its central axis.

A bracket 42 is formed on the inner surface of the main body housing 12 on the side of the sliding guide portion 19 so as to project toward the central axis. The two brackets 42 are formed at positions shifted from each other by 90 degrees about the center axis of the main body housing 12. Also,
A support projection 51 is formed on the outer surface of the sliding guide portion 19 (the surface inside the main body housing 12) in a direction that bisects the angle formed between these two brackets 42 and the central axis.

Also, on the lower end surface of the main body housing 12,
A circular hole 12a is formed coaxially with the central axis. [Battery Case] The battery case 17 has a cylindrical shape having the same diameter as the outer diameter of the main body housing 12. In the center of the upper end surface and the lower end surface of the battery case 17, a circular hole 12 formed in the lower end surface of the main body housing 12 is formed.
The circular holes 17a and 17b having the same diameter as the a are formed.

[Upper Housing] The upper housing 16 has a box shape coaxial with the center axis of the main body housing 12, and four side surfaces parallel to the center axis are configured as windows (light emitting portions) 16b made of a transparent member. Further, a lid 16c made of an opaque member for closing the end face of the window 16b is attached. At the center of the lid 16c, a circular hole 16a into which the transparent member 36 is inserted is formed.

[Light Projection Device] The light projection device 13 is composed of a rotating light projecting portion 15 and a main body portion 20 that holds the rotating light projecting portion 15 rotatably and coaxially via a bearing 10. . The main body 20 has a hollow laser light path 20b penetrating the whole along the central axis thereof, and a laser light path 20 branched at a right angle from the laser light path 20b.
a are formed. In addition, the rotary light emitting unit 15 includes:
Hollow laser light paths 15a, 15a, which are coaxially connected to the laser light path 20b and are formed coaxially with the rotation axis thereof.
And a pentaprism housing portion 15b communicating with the laser beam path 15a and having openings in the end face direction and sideways.
Are formed.

Further, the light projecting device 13, in order to adjust the emission direction of the vertical on the beam L ₅ and the vertically downward beam L ₂ to be described later, the tilting mechanism 80 is tiltable in all directions in the main body housing 12 I have. Note that the microcomputer 82 controls the tilt direction and tilt amount of the light projecting device 13.

(Laser Emission Optical System) FIG. 14 is a diagram showing an optical configuration of a laser emission optical system built in the laser surveying device 11. FIG. 15 is a diagram showing a rotary light projecting unit 15 that emits a cylinder beam to be subjected to the beam image horizontal adjustment method of the present invention, and an optical configuration of an optical system incorporated in the rotary light projecting unit 15. . Hereinafter, the optical configuration of the laser emission optical system will be described with reference to FIGS.

The laser light paths 20a and 20a in the main body 20
A polarization beam splitter 27 is fixed at the intersection of 0b. A laser diode 23 is fixed to an end face of the laser light path 20a, and a collimator lens unit 24 and an anamorphic prism 18 are fixed to an intermediate portion thereof. Further, on the side of the battery case 17 in the laser beam path 20b, a vertically lower beam optical axis adjustment unit 29 in which adjustment wedges 29a and 29b are stored is fixed. The λ / 4 plate 2 is arranged on the rotary light projecting unit 15 side in the laser beam path 20b in order from the polarizing beam splitter 27 side.
8, the front group lens 31 and the rear group lens 32 are fixed. Further, the pentaprism 35 and the wedge-shaped prism 3
4 is fixed. A cylindrical lens 3 is provided on the axis side of the pentaprism 35 orthogonal to the laser light path 20b.
7 and wedge glass 38 are fixed.

Laser diode 23 as laser light source
Oscillates a laser beam L ₀ which is linearly polarized in the S polarization plane (plane perpendicular to the plane of FIG. 12) with respect to the polarization separation plane 27a of the polarization beam splitter 27. Collimator lens unit 24 is a lens for the laser beam L ₀ emitted from the laser diode 23 into a parallel beam. The anamorphic lens 18 is a lens for correcting the cross-sectional shape of the laser beam transmitted through the collimator lens 24 to a perfect circle.

[0041] In the polarizing beam splitter 27, the polarization splitting surface 27a inclined 45 degrees to lambda / 4 plate 28 side with respect to the beam axis of the laser beam L ₀ from the laser diode 23 is formed. This polarization splitting surface 27a converts S-polarized light into 10
It has the property of reflecting 0% and transmitting 100% of P-polarized light. Therefore, the laser beam L ₀ transmitted through the anamorphic lens 18 is reflected to the 100% λ / 4 plate 28 side.

The λ / 4 plate 28 is arranged such that the direction of the optical axis is inclined at 45 degrees with respect to the P-polarization plane (plane parallel to the paper surface) with respect to the polarization separation plane 27 a with the optical axis as the center. Affixed to Therefore, the λ / 4 plate 28
Converts incident linearly polarized light into circularly polarized light. This λ / 4
On the side surface of the pentaprism 35 of the plate 28, a partially transmitting film that reflects a part of the laser light toward the polarization beam splitter 27 is formed. The circularly polarized laser light reflected by the partially transmitting film re-enters the λ / 4 plate 28, is converted into P-polarized light, and passes through the polarization beam splitter 27.

The laser beam (vertical downward beam) L ₂ transmitted through the polarizing beam splitter 27 is adjusted by adjusting wedges 29 a and 29.
b, and is emitted from the lower end of the light projecting device 13. The adjusting wedges 29a and 29b are optical elements formed of planes facing each other at an angle slightly smaller than parallel. Beam axis of the vertically downward beam L _2, the adjusting wedge 29a, is slightly bent by 29b. Therefore, the adjustment wedge 29a as an axis the central axis of the body portion 20, by rotating each 29 b, it is possible to adjust the angle of the beam axis of the vertically downward beam L _2.

On the other hand, lambda / 4 group lens 31 before the laser beam L ₁ is incident transmitted through the partial transmission film of the plate 28 is a negative lens, sliding cylindrical member inserted retractably into the laser light path 20b 30. Further, the rear group lens 32 the laser light L ₁ that has been diverged by the front lens 31 is incident is positive lens, and is fixed to the laser light path 20b. Therefore, the front lens group 31 and the rear lens group 32 constitute a beam expander for expanding the beam diameter of the incident laser light.

Since the front lens group 31 is moved forward and backward by the focusing mechanism 81, the position where the beam waist is formed can be changed. Thereby, the beam diameter of the projected laser light can be adjusted arbitrarily. The focusing mechanism 81 is controlled by the microcomputer 82.

The pentaprism 35 on which the laser beam L ₁ transmitted through the rear lens group 32 is incident is fixed in the pentaprism housing portion 15 b of the rotary light projecting portion 15 so as to rotate integrally with the rotary light projecting portion 15. Have been. The pentagonal prism 35 has a light incident surface 35c of the laser beam L ₁ is incident,
It is inclined by 22.5 degrees with respect to the light incident surface 35c, and is inclined by 45 degrees with respect to the first reflecting surface 35a on which the laser light incident from the light incident surface 35c enters. A second reflecting surface 35b for reflecting the laser light reflected by the first reflecting surface again, and a second reflecting surface 3 perpendicular to the light incident surface 35c.
Light emitting surface 35 for emitting a laser beam L ₃ reflected by 5b
d. In addition, since the enhanced reflection film is formed on the second reflection surface 35b by aluminum vapor deposition,
The laser light is internally reflected 100% on the second reflection surface 35b. On the other hand, a partially transmitting film having a reflectivity of 70 to 80% is formed on the first reflecting surface 35a.
Thus, 20-30% of the laser beam (vertically on the beam) L _5, transmitted through the first reflecting surface 35a, passes through the wedge prism 34, is emitted from the upper end of the light projecting device 13.

On the other hand, the light exit surface 35 of the pentaprism 35
laser light emitted from the d L _3, the first and second rotating barrel 39a, a pentaprism housing portion 15 via the 39b
The light enters a cylindrical lens 37 and a wedge glass 38 fixed to a light projecting window 33 opened to the side of b. This laser light L ₃ transmits through the cylindrical lens 37 and the wedge glass 38 and further passes through the window 1 of the upper housing 16.
6b is transmitted through the, and is emitted as a cylinder beam L _4. The first rotating barrel 39a, so is rotatable in the light projection window 33, can be rotatably holding the cylindrical lens 37 relative to the cylinder beam L _4. Further, since the second rotating barrel 39b is rotatable with respect to the first rotating barrel, the wedge glass 38 can be rotatably held independently of the cylindrical lens 37. The cylindrical lens 37, since it has a cylinder axis in the vertical direction, the cross-sectional shape of the cylinder beam L ₄ are, it has to have been expanded in the horizontal direction (direction perpendicular to the cylinder axis). The cylindrical lens 37 is formed in a flat plate shape with the center of the cylindrical surface along the cylinder axis. That is, of the laser light incident on the cylindrical lens 37, the light incident on the central portion of the flat plate is transmitted as it is without being diffused, and the light incident on the cylindrical surface off the central portion is Spread horizontally.
Therefore, the cylinder beam L ₄ forms a cylinder beam image 53 having a relatively high-brightness spot at the center thereof by the cylindrical lens 37. Further, the wedge glass 38 is moved along the beam axis of the cylinder beam L ₄ so that the cylinder beam L ₄ expanded by the cylindrical lens 37 is emitted exactly perpendicularly to the vertical upper beam L ₅ and the vertical lower beam L ₂ . by rotating around the direction of the beam axis of the cylinder beam L ₄ is finely adjusted. The cylinder beam L ₄ emitted in this manner is
The pentaprism 35 together with the rotary light projecting unit 15 emits the laser light L ₁
A vertical or horizontal reference line is projected on a wall surface or the like by rotating in a plane orthogonal to.

(Rotating Mechanism) Next, a rotating mechanism for rotating the rotary light projecting section 15 with respect to the main body section 20 will be described.

On the outer peripheral surface of the rotary light projecting unit 15 rotatably connected to the main body 20 via the bearing 10,
The gear 69 is fixed. On the other hand, a bracket 65 protruding outward is provided on the upper end surface of the bulging portion 21 of the main body 20. The light emitting section rotating motor 66 is fixed to the bracket 65, and a pinion 67 attached to a rotating shaft of the light emitting section rotating motor 66 meshes with a gear 69 of the rotary light emitting section 15. The microcomputer 82 controls the stop or the rotation of the light projecting unit rotation motor 66. That is, when stopping the light projection unit rotation motor 66, the beam axis of the cylinder beam L ₄ emitted from the light projecting window 33 is stopped while facing certain direction. On the other hand, the light emitting unit rotation motor 6
6 rotates the emission direction of the cylinder beam L ₄ emitted from the projection window 33 around the rotation axis of the rotary projection unit 15, so that the beam axis of the laser beam L ₁ is aligned with this rotation axis. As long as they match, a reference plane perpendicular to this axis of rotation is formed.

[Operation of Laser Surveying Apparatus] FIG. 16 is a perspective view showing the appearance of the laser surveying apparatus 11. This FIG.
Shows a state in which the laser surveying device 11 is used upright to perform horizontal laser scanning (inking out).

From the upper end of the upper housing 16, a vertically upper beam L ₅ is emitted upward of the laser surveying device 11, and from the lower end of the battery case 17,
The vertical beam L ₂ is emitted downward from the laser surveying device 11. These vertical on the beam L ₅ and the vertically downward beam L ₂ is consistent beam axes to each other,
Each forms a reference spot on the ceiling or floor.

[0052] Also, from the window 16b of the upper housing 16, a cylindrical lens 37 and cylinder beam L _4, which is enlarged in the horizontal direction is emitted horizontally, by projecting cylinder beam image 53 is a reference line on the wall I have.
Since the cylinder beam image 53 forms a horizontal line, the operator can mark the horizontal line using the cylinder beam image 53. Note that the beam L above the vertical
₅ and the vertically downward beam L ₂ is connecting the two reference spot formed linearly with (equal to the vertical on the beam L ₅ and the beam axis of the vertically downward beam L _2), and the beam axis of the cylinder beam L _4, orthogonal to each other ing.

In addition, in a case where blackout of a horizontal line is performed in all circumferential directions,
In such a case, by rotating the rotary light emitting unit 15,
Cylinder beam L emitted from rotary light projecting unit 15_FourRun
Let me check. Then, as shown in FIG.
Over the cylinder beam L _FourTrajectory SL is drawn
You. In this manner, the rotary light projecting unit 15 is rotated to
Dabeam L_FourIf you scan the
The amount of projected laser light per unit time is reduced.
For this reason, when the surroundings are relatively bright,
If the distance from 11 to the wall is long, a horizontal plane is formed.
It becomes difficult to visually observe the locus SL. So, the optical inspection
In some cases, the trail SL is detected by using the output unit D.
In this way, the reference line is scanned by scanning the laser beam in all circumferential directions.
When it is formed, it is formed at the center of the cylinder beam image 53.
The high-intensity spot created allows the operator
It is possible to easily detect the laser beam by the photodetector D.
Wear.

When it is desired to form a reference line in the vertical direction, the laser surveying device 11 can be used lying down in the direction shown in FIG. 16 as shown in FIG. In this way, by laying the laser surveying apparatus 11 in a laid state, it is possible to form the reference line in the vertical direction, or to form the reference line on the ceiling or floor. In this case, the vertically upward beam L ₅ and the vertically downward beam L _2, respectively to form a reference spot like on the wall.

[0055] (ii) beam image Leveling method and leveling apparatus Next, the horizontal adjustment method and leveling apparatus of the cylinder beam L ₄ emitted from configured laser surveying instrument 11 as described above will be described.

[0056] Cylinder beam L _4, which is enlarged in the horizontal direction by the cylindrical lens 37, and the like are formed on the reference line wall (cylinder beam image 53). Therefore, the cylinder beam image 53 must be accurately projected horizontally. As described above, the direction of the cylinder beam L ₄ is enlarged is perpendicular to the direction of the cylinder axis ls of the cylindrical lens 37 (see FIG. 18). Therefore,
During assembly of the laser surveying instrument 11, the cylindrical lens 37, by rotating about the beam axis of the cylinder beam L _4, the cylindrical lens 37
Of the cylinder axis Is of the cylinder beam image 5
3 so that it is accurately projected horizontally.

First Embodiment (Principle) First, the principle of the horizontal adjustment method of a cylinder beam image according to the first embodiment will be described. First, as shown in FIG. 1, two one-dimensional position-sensitive detectors (hereinafter, referred to as PSDs) 50a and 50b serving as optical position detecting elements are moved in their PSD measurement directions (light position detection). Direction) Y1 and Y2 are installed in parallel with the vertical direction. At this time, two one-dimensional PSDs 5
The interval 51 between 0a and 50b is about 10 mm.

Next, as shown in FIG. 2, another laser surveying device (hereinafter, referred to as a laser surveying device) in which the horizontal adjustment of the emission direction of the laser beam is performed.
The hereinafter) and the calibration laser surveying apparatus 111, laser light emitted from the calibration laser surveying device 111 (hereinafter, referred to as the reference laser beam L ₆₎ is parallel to the installed one-dimensional PSD50a, the 50b Install so that it is incident. Then, horizontally to emit a reference laser beam L ₆ from the calibration laser surveying device 111, it is scanned in the circumferential direction. Then, the trajectory SL2 by the reference laser beam L ₆ is formed.
Note that the reference laser beam L ₆ forming the trajectory SL2 is
The beam light is not a light beam expanded in the horizontal direction by the cylindrical lens, but a light beam converged in a spot shape having a perfectly circular cross-sectional shape. Figure 3 shows the spot 52 and the trajectory SL2 of the reference laser beam L ₆ emitted from the calibration laser surveying device 111. As shown in FIG. 3, the reference laser beam L ₆ emitted from the calibration laser surveying apparatus 111, one-dimensional PSD50a, also projected onto 50b. These one-dimensional PSD50a, incident position of the reference laser beam L ₆ to 50b are one-dimensional PSD50a, 50
It is calculated based on the current ratio output from each output terminal of b. Thus detected reference laser beam 1 dimensional PSD50a of L _6, the center coordinates of the incident position to 50b, each 1
It can be defined as a reference height in the dimensions PSD 50a, 50b. Therefore, one of the reference laser beams L ₆
Dimension PSD50a, by calibrating the laser surveying device 111 the center coordinates of the incident position to 50b and the horizontal reference height y _0.

As described above, the one-dimensional PSDs 50a, 50a
The horizontal reference height y ₀ of b after setting, by replacing the calibrated laser surveying device 111 to the laser surveying device 11 to be adjusted, perform leveling of the cylinder beam L _4. In other words, the irradiation position of the vertical on the beam L ₅ and the vertically downward beam L ₂ exactly to match that of the calibration laser surveying device 111 adjusts the position of the laser surveying instrument 11 from the laser surveying instrument 11, a cylinder beam L ₄ is emitted. At this point in time, guarantee the long axis of the image (cylinder beam image 53) by the cylinder beam L ₄ is oriented horizontally will not. Next, the rotary light projecting unit 15 is rotated. And
As shown in FIG. 4, the center of the cylinder beam image 53 is located in the middle of the two one-dimensional PSDs 50a and 50b, that is, both ends of the cylinder beam image 53 are evenly distributed on the two one-dimensional PSDs 50a and 50b. as will be illuminated, to adjust the emission direction of the cylinder beam L _4.

Then, the cylinder beam image 53 is irradiated on the two one-dimensional PSDs 50a and 50b as shown in FIG. At this time, the major axis x of the cylinder beam image 53
₀ (In FIG. 5, substantially lateral direction of the page) and, the reference laser beam L ₆ trajectory SL2 that constitutes the calibration laser surveying device 111, not parallel. At this time, the center of the incident position of the cylinder beam image 53 on the one-dimensional PSD 50a is
The distance from the horizontal reference height y ₀ to y _11. Similarly, the center of the incident position on the one-dimensional PSD50b cylinder beam image 53, the distance from the horizontal reference height y ₀ and y _12.
Then, these two values y ₁₁ and y ₁₂ such that the same value, i.e., the center axis x ₀ of the locus SL2 formed by the reference laser beam L ₆ of the calibration laser surveying instrument 111 cylinders beam image 53 Is adjusted by rotating the cylindrical lens 37 of the laser surveying device 11 so that the directions are parallel. When adjusted in this way, the one-dimensional PSD5
Straight lines and the center of the incident position of the cylinder the beam image 53 to the center and one-dimensional PSD50b incident position of the cylinder the beam image 53 to 0a is, parallel to the trajectory SL during the scanning of the cylinder beam L _4.

(Beam Image Horizontal Adjustment Apparatus) Next, a beam image horizontal adjustment apparatus according to the first embodiment of the present invention utilizing the above principle will be described. 6, in order to explain the structure of the beam image leveling device 1 according to the first embodiment, is a perspective view showing a vertical section along the optical axis l ₁ of the condenser lens 70.

A lens barrel support member 74 is fixed to the front end surface of a housing 76 having a rectangular cross-section. The lens barrel support member 74 has one end of the housing 76 sealed by a rectangular flat plate portion 74 a having substantially the same cross-sectional shape as the housing 76. Also, this lens barrel support member 74
A cylindrical portion 74b protrudes from a central portion of the flat plate portion 74a. On the outer surface of the cylindrical portion 74b of the lens barrel support member 74,
A lens barrel 71 having substantially the same inner diameter as the outer diameter of the cylindrical part 74b is fixed, and the rear end face of the lens barrel 71 is
a.

In the vicinity of the front end on the inner surface of the lens barrel 71,
The inner flange 71a protrudes along the circumferential direction. A condenser lens 70 having an outer diameter substantially the same as the inner diameter of the lens barrel 71 is fitted so as to be in close contact with the front side surface of the inner flange 71a. The outer edge of the front end face of the condenser lens 70 is fixed in the lens barrel 71 by being pressed by an annular lens holder 75 having an outer diameter substantially equal to the inner diameter of the lens barrel 71.

The rear end surface of the housing 76 is sealed by a rectangular substrate 77 having substantially the same outer edge shape as the end surface of the housing 76. On the surface of the substrate 77 facing the inside of the housing 76, a PSD arrangement plate 73 is provided. The PSD arrangement plate 73 has two one-dimensional PSDs 7
2a and 72b are incorporated. The distance between the two one-dimensional PSDs 72a and 72b from the condenser lens 70 is equal to or slightly smaller than the focal length of the condenser lens 70. The PSDs 72a and 72b are provided with a lens barrel 70.
Symmetrically with respect to the condenser lens optical axis l ₁ 70 incorporated within, and is disposed toward the PSD measurement direction in the vertical direction. The distance between these PSDs is about 10 m.
m.

Hereinafter, a method for adjusting the beam image level using the beam image level adjusting apparatus 1 according to the first embodiment will be described. First, the calibration laser surveying device 111 is installed at a distance of about 1 m from the beam image horizontal adjustment device 1. Then, emit a reference laser beam L ₆ from the calibration laser surveying device 111. The height of the beam image leveling device 1 is increased by installing the beam image leveling device 1 on a tripod so that the reference laser beam L ₆ is incident on the condenser lens 70 of the beam image leveling device 1. adjust. At this time, the beam image leveling device 1 is installed such that the PSD measurement directions of the one-dimensional PSDs 72a and 72b of the beam image leveling device 1 are substantially vertical.

Next, the rotation of the calibration laser surveying device 111
By rotating the light emitting section, the reference laser light L ₆Horizontal in the circumferential direction
Scan. Then, the reference laser beam L₆Water beam image
The light enters the condenser lens 70 of the flat adjustment device 1. Reference laser
Light L₆Is transmitted through the condenser lens 70 and is used for calibration laser measurement.
With the rotation of the device 111, the one-dimensional PSDs 72a, 72
b. And the one-dimensional PSDs 72a, 72
Reference laser beam L detected by b₆In the spot
The beam image leveling device is adjusted so that the center positions are
The tilt of the device 1 along the optical axis is adjusted. Vertical at this time
Beam L_FiveAnd vertical beam L_TwoPosition as the reference position
You.

[0067] Then, as shown in FIG. 7, the laser surveying instrument 11, and installed so that the position of the vertically on the beam L ₅ and the vertically downward beam L ₂ matches the reference position to emit cylinder beam L _4. Then, the cylinder beam L ₄ is incident on the condenser lens 70 of the beam image horizontal adjustment device 1,
Adjusting the emission direction of the cylinder beam L _4. The cylinder beam L ₄ is transmitted through the condenser lens 70 and the PSD arrangement plate 7
An image (cylinder beam image 53) is formed on 3.

Here, in order to accurately detect the position of light incident on the one-dimensional PSDs 72a and 72b, the one-dimensional PSD
The beam width of light incident on D72a, 72b is 0.2 m
m is desirable. However, the diameter of the laser beam L ₃ before passing through the cylindrical lens 37 is typically, 12 mm approximately. Thus, the beam width in the minor axis direction of the cylinder beam L _4, which is enlarged in the horizontal direction by the cylindrical lens 37 also becomes about 12 mm. Therefore, in the first embodiment, the condenser lens 7
By converging the cylinder beam L ₄ by 0,
Cylinder beam L ₄ on one-dimensional PSD 72a, 72b
Is about 0.2 mm in the short-axis direction.

As described above, the horizontal adjustment of the cylinder beam needs to be performed with an accuracy of about one minute. However, when focusing the cylinder beam L ₄ by the condenser lens 70, at the same time since becomes smaller major axis direction of the beam width of the cylinder beam L _4, measurement error when performing the leveling of the cylinder beam image is increased Would. 1
Cylinder beam image 53 by dimensional PSDs 72a and 72b
In order to perform horizontal adjustment with a precision of one minute, at least
The length of the cylinder beam image 53 in the direction in which the beam is expanded (horizontal direction) needs to be 10 mm or more. Therefore, the length of the cylinder beam image 53 reduced by the condenser lens 70 in the horizontal direction is about 10 mm.
The distance of the PSD placement plate 73 on which the one-dimensional PSDs 72a and 72b are installed from the condenser lens 70 is defined.
For this reason, the PSD arrangement plate 73 may be installed closer to the condenser lens 70 than the focal position of the condenser lens 70.
In order to measure the height of both ends of the cylinder beam image 53 whose horizontal length is about 10 mm, two 1
PS with the distance between the dimensional PSDs 72a and 72b being 10 mm
It is installed on the D arrangement plate 73.

Then, as shown in FIG. 7, the laser surveying device 11 sends the two ends of the cylinder beam image 53 so as to be positioned on two one-dimensional PSDs 72a and 72b provided on the PSD placement plate 73. emission direction and the cylinder beam L _4, to adjust the distance from the beam image leveling device 1 of the laser surveying instrument 11.

At this time, the one-dimensional PSDs 72a and 72b
The centers of both end portions of the cylinder beam image 53 incident on, for detecting the amount of deviation from the prescribed horizontal reference height by calibrating the laser surveying device 111 (the center of the spot of the laser beam L _6). As one-dimensional PSD72a, the respective amount of displacement 72b coincide, the cylindrical lens 37 incorporated in the laser surveying instrument 11, is rotated in a plane orthogonal to the beam axis of the cylinder beam L _4, a cylinder beam Adjust so that the image 53 is accurately projected horizontally. After this adjustment, the first rotary lens barrel 39a is fixed with the stop screw 40.

As described above, according to the first embodiment, P
SD measuring direction in the vertical direction one-dimensional two provided in parallel toward the PSD50a, a 50b, by scanning by the horizontal beam by the laser beam L _6, one-dimensional PSD
50a, after defining a horizontal reference height y ₀ in 50b, the cylinder beam L ₄ one-dimensional PSD50a, 50b
, And the deviations y ₁₁ and y ₁₂ of the heights at both ends of the cylinder beam image 53 from the horizontal reference height y ₀ can be detected. Therefore, the cylinder beam image 53 can be adjusted horizontally more accurately than the conventional method of visually adjusting the beam image horizontal. Further, since the PSD has a characteristic of detecting the center position of the incident light, the cylinder beam L ₄
Even if a light beam having a certain width such as
The center of the incident position can be detected. further,
According to the first embodiment, since an observer for detecting the deviation of the cylinder beam image 53 from the horizontal is not required, the horizontal adjustment of the cylinder beam image 53 can be performed by only one worker. .

<Second Embodiment> (Principle) FIG. 8 is a view showing the concept of a horizontal adjustment method of a cylinder beam image according to the second embodiment. The horizontal adjustment method of the cylinder beam image according to the second embodiment has a two-dimensional P
An SD 90 is covered with a shielding member having two slits provided in parallel in the vertical direction on the light receiving surface 90a of the two-dimensional PSD 90, and shutters 91a and 91b are provided on each slit. . In the beam image horizontal adjustment method according to the second embodiment, first,
As shown in FIG. 8, the x-axis direction and the y-axis direction of the two-dimensional PSD are adjusted in advance so that they are the horizontal direction and the vertical direction, and the two shutters 91a and 91b are turned in the vertical direction.

Next, the horizontal adjustment of the cylinder beam image 53 will be described.
The object of the laser surveying device 11 is a two-dimensional PSD90.
1m apart. And Cylinder Bee
Mu L _FourAnd on the light receiving surface 90a of the two-dimensional PSD 90
Of the cylinder beam image 53 to the shutters 91a and 91b
Laser surveying equipment so that both ends in the horizontal direction are incident
11 position and cylinder beam L_FourAdjust the emission direction of
You.

FIG. 9 is a diagram showing a state where the cylinder beam L ₄ from the laser surveying device 11 is incident on the two-dimensional PSD 90 in the beam image horizontal adjustment method according to the second embodiment. In FIG. 9, the shutters 91a, 91
The state where the slit is shielded by b is shown by oblique lines, and the state where the slit is opened by the shutters 91a and 91b is shown by white. 2D PSD90
Cylinder beam L ₄ incident on, as in FIG. 9 (a), to form a cylinder beam image 53 on the light receiving surface 90a of the two-dimensional PSD 90. First, as shown in FIG. 9B, the shutter 9 on the light receiving surface of the two-dimensional PSD 90 is used.
1b shields the slit from light. As a result, the cylinder beam L ₄ is only emitted from the slit of the shutter 91 a for 2 seconds.
It is incident on the dimensional PSD 90. At this time, the shutter 9
2D PSD through slit opened by 1a
Let (a ₁ , b ₁ ) be the center coordinates of the incident position of the left end of the cylinder beam L ₄ incident on 90.

Next, as shown in FIG.
Open b, by shielding the shutter 91a, a cylinder beam L _4, is incident only on the two-dimensional PSD90 from a slit which is opened by the shutter 91b. At this time, the two-dimensional PS is passed through the slit of the shutter 91b.
Let (a ₂ , b ₂ ) be the center coordinates of the incident position at the right end of the cylinder beam L ₄ incident on D 90.

The amount of inclination of the cylinder beam image 53 in the horizontal direction is obtained by the equation (b ₁ -b ₂ ) / (a ₁ -a ₂ ). This inclination amount is set to 0, that is, b ₁ =
By rotating the cylindrical lens 37 of the laser surveying device 11 so as to be b ₂ , the cylinder beam image 53 is adjusted to be accurately horizontal. With this adjustment, the straight line connecting the incident positions (a ₁ , b ₁ ) and (a ₂ , b ₂ ) of the cylinder beam image 53 to the two-dimensional PSD 90 is parallel to the trajectory SL during the scanning of the cylinder beam L _4. become.

(Beam Image Leveling Apparatus) The beam image leveling apparatus according to the second embodiment has two slit-shaped shutters 98 provided in parallel in the vertical direction on the light receiving surface thereof.
The second embodiment is characterized in that a two-dimensional PSD 96 provided with a and 98b is used, and the other parts are the same as in the first embodiment. That is, as shown in FIG. 10, the beam image horizontal adjustment device 2 of the second embodiment includes a two-dimensional PSD
96 are arranged. The two-dimensional PSD 96 is installed on the substrate 77 so that the x-axis direction and the y-axis direction are horizontal and vertical, respectively. The light receiving surface of the two-dimensional PSD 90 is covered with a light blocking member having two vertically oriented slits, and shutters 98a and 98b are provided in each of the slits. As a result, light is incident on the two-dimensional PSD 96 only at the portion where the shutters 98a and 98b are provided.

Hereinafter, the procedure for horizontal adjustment of the cylinder beam image 53 by the beam image horizontal adjustment device 2 of the second embodiment will be described. First, as shown in FIG. 11, the laser surveying device 11 is installed at a distance of about 1 m from the beam image horizontal adjustment device 2. Then, the cylinder beam L ₄ emitted from the laser surveying device 11 is incident on the condenser lens 70 of the beam image horizontal adjustment device 2 so that the cylinder beam L ₄ is emitted.
₄ to adjust the emission direction and the height of the beam image horizontal adjustment device 2. Further, both ends of the horizontal direction of the image by the cylinder beam L ₄ (cylinder beam image 53), the two-dimensional PSD
The beam image horizontal adjustment device 2 of the laser surveying device 11 so that it is incident on the shutters 98a and 98b provided in the 96.
Adjust the distance from.

Next, the dark shutter 98b, is incident to the cylinder beam L ₄ only in a two-dimensional PSD96 from the slit of the shutter 98a. At this time, the shutter 98
The center coordinates of the left end of the cylinder beam image 53 incident on the two-dimensional PSD 96 through the slit a are represented by (a ₁ ,
b ₁ ).

[0081] Then, in turn, shields the slit by the shutter 98a, only from the slit of the shutter 98b, the 2-dimensional PSD96 caused to enter the cylinder beam L _4. At this time, 2 through the slit of the shutter 91b.
The center coordinates of the right end of the cylinder beam image incident on the dimensional PSD 90 are (a ₂ , b ₂ ). From the center coordinates of the left and right ends of the cylinder beam image 53 obtained in this way, the amount of inclination of the cylinder beam image 53 from the horizontal is (b ₁ −b ₂ ) / (a ₁ −a ₂ ). Can be obtained by Then, the cylindrical lens 37 is set so that the tilt amount becomes zero, that is, b ₁ = b _2.
Rotate to make adjustments.

As described above, according to the second embodiment, 2
By using two shutters 91a and 91b and a slit provided in parallel in the vertical direction on the light receiving surface 90a of the two-dimensional PSD 90, the incident positions at both ends of the cylinder beam image 53 incident on the two-dimensional PSD 90 are detected. , The inclination amount of the cylinder beam image 53 with respect to the horizontal can be obtained. Therefore, similarly to the first embodiment, the cylinder beam image 53 can be horizontally adjusted more accurately than the conventional method of visually adjusting the beam image horizontally. Also, PSD is because it has a characteristic of detecting a center position of the incident light, even when the light beam is incident with a certain width as the cylinder beam L _4, it is possible to detect the center of the incident position. Further, since an observer for detecting the deviation of the cylinder beam image 53 from the horizontal is not required, even one operator can perform the horizontal adjustment of the cylinder beam.

[0083]

According to the present invention, horizontal adjustment of a cylinder beam emitted from a laser surveying instrument can be performed with high accuracy and high efficiency. Further, it is possible to provide a beam image horizontal adjustment device capable of easily performing such horizontal adjustment of the cylinder beam.

[Brief description of the drawings]

FIG. 1 is a front view of a one-dimensional PSD used in a beam image horizontal adjustment method according to a first embodiment of the present invention;

FIG. 2 is a perspective view showing the principle of a beam image horizontal adjustment method according to the first embodiment of the present invention.

FIG. 3 is a front view showing the principle of the beam image horizontal adjustment method according to the first embodiment of the present invention;

FIG. 4 is a perspective view showing the principle of the horizontal adjustment method of the beam image according to the first embodiment of the present invention.

FIG. 5 is a front view showing a cylinder beam image formed on a one-dimensional PSD when performing the beam image horizontal adjustment method according to the first embodiment of the present invention;

FIG. 6 is a perspective view of the beam image horizontal adjustment device according to the first embodiment of the present invention.

FIG. 7 is a perspective view showing a beam image horizontal adjustment method by the beam image horizontal adjustment device according to the first embodiment of the present invention;

FIG. 8 is a perspective view showing the principle of a horizontal adjustment method of a beam image according to a second embodiment of the present invention.

FIG. 9 is an explanatory diagram of a procedure of a beam image horizontal adjustment method according to the second embodiment of the present invention.

FIG. 10 is a perspective view of a beam image horizontal adjustment device according to a second embodiment of the present invention.

FIG. 11 is a perspective view showing a beam image horizontal adjustment method by the beam image horizontal adjustment device according to the second embodiment of the present invention.

FIG. 12 is a sectional view of a laser surveying apparatus to be adjusted by the beam image horizontal adjusting method according to the present invention.

13A is a vertical sectional view, FIG. 13B is a top view, and FIG. 13C is a front view of the rotary projection unit of the laser surveying device of FIG.

14 is an optical configuration diagram of a laser emission system of the laser surveying device of FIG.

15 is a perspective view showing an optical system inside a rotary light projecting unit of the laser surveying device of FIG.

FIG. 16 is a perspective view showing the appearance of the laser surveying device of FIG. 12;

FIG. 17 is a perspective view showing the appearance of the laser surveying device of FIG. 12;

FIG. 18 is a diagram showing a state where a beam is expanded by a cylindrical lens.

FIG. 19 is a perspective view showing a state of a conventional beam image horizontal operation.

FIG. 20 is an explanatory diagram of a conventional beam image horizontal adjustment method.

[Explanation of symbols]

1, 2 Beam image horizontal adjustment device 11 Laser surveying device 53 Cylinder beam image 70 Condensing lens 50, 72 One-dimensional PSD 73 PSD arrangement plate 74 Barrel support member 90, 96 Two-dimensional PSD 91, 98 Shutter 111 Calibration laser surveying device L ₂ vertically downward beam L ₄ cylinder beam L ₅ vertically on the beam L ₆ reference laser beam

Claims (12)

[Claims] 1. A method for horizontally adjusting a beam image in a laser surveying apparatus that rotates a light projecting unit that emits a laser beam enlarged in one direction and scans the laser beam in a predetermined plane, the method comprising: A first side-by-side provided in the direction of the scanning surface for detecting the incident position of light in a direction substantially perpendicular to the surface
And simultaneously causing the laser light to be incident on the second optical position detecting element, and the incident position of the laser light on the first optical position detecting element and the incident of the laser light on the second optical position detecting element A beam image horizontal adjustment method, comprising: adjusting an enlarging direction of the laser light so that a straight line connecting a position is parallel to the scanning surface. 2. Scanning a reference laser beam converged in a spot shape in advance in a plane parallel to the scanning plane, and detecting the incident position of the light in a direction substantially orthogonal to the scanning plane. The first provided side by side in the direction
And after the reference laser light is incident on the second light position detecting element, the adjustment target laser light enlarged in one direction is incident on the first and second light position detecting elements in a stationary state. The distance from the incident position of the reference laser light to the first light position detecting element to the incident position of the adjustment target laser light and the incident position of the reference laser light to the second light position detecting element. 2. The horizontal adjustment method of a beam image according to claim 1, wherein the enlargement direction of the laser light is adjusted so that a distance to an incident position of the adjustment target laser light is equal to each other. 3. The laser beam scanning device according to claim 2, wherein the reference laser beam is scanned by a calibration laser surveying device separate from the laser surveying device scanning the laser beam to be adjusted.
The horizontal adjustment method of the beam image described. 4. The device according to claim 1, wherein the first and second light position detecting elements are
4. The horizontal adjustment method of a beam image according to claim 1, wherein the method is a three-dimensional position-sensitive detector. 5. A method for horizontally adjusting a beam image in a laser surveying device that rotates a light projecting unit that emits laser light expanded in one direction and scans the laser light in a predetermined plane, wherein the scanning is performed. The light receiving surface is covered by a light blocking member having first and second slits oriented in a direction substantially perpendicular to the surface formed in parallel, and light incident on the light receiving surface through any of the slits is incident. Irradiating the laser light to a light position detection element for detecting a position, detecting an incident position of the laser light incident on the light receiving surface through the second slit in a state where the first slit is closed, In a state where the second slit is closed, an incident position of the laser light incident on the light receiving surface through the first slit is detected, and the laser light incident on the light receiving surface through the first slit is detected. Adjusting the enlargement direction of the laser light such that a straight line connecting the incident position of the laser light and the incident position of the laser light incident on the light receiving surface through the second slit is parallel to the scanning surface. A characteristic beam image horizontal adjustment method. 6. The method according to claim 5, wherein the light position detecting element is a two-dimensional position-sensitive detector. 7. The horizontal adjustment method of a beam image according to claim 1, wherein the laser beam is enlarged in one direction by a cylindrical lens. 8. The horizontal adjustment method for a beam image according to claim 1, wherein the laser beam is simultaneously incident on the first and second photodetectors in a stationary state. . 9. A beam image horizontal adjustment device used in the beam image horizontal adjustment method according to claim 1, wherein: a condenser lens; and an optical axis of the condenser lens orthogonal to the optical axis of the condenser lens. A beam image horizontal adjustment device, comprising: the first and second light position detecting elements arranged in parallel with each other around a symmetry axis orthogonal to the optical axis in a plane to be formed. 10. An apparatus according to claim 9, wherein said first and second photodetectors are one-dimensional position-sensitive detectors. 11. A beam image horizontal adjustment device used in the beam image horizontal adjustment method according to claim 5 or 6, wherein: a condenser lens; and an optical axis on an optical axis of the condenser lens. And a light position detecting element arranged in a plane orthogonal to the beam position adjusting device. 12. The beam image horizontal adjustment device according to claim 11, wherein said light position detecting element is a two-dimensional position-sensitive detector.