JP5217683B2 - Mark generating apparatus and mark generating method - Google Patents

Description

  The present invention relates to an apparatus and a method for generating a dot-like or linear mark on a space using a laser beam.

  Conventionally, when building piles and steel frames at construction and civil engineering sites, a standard position is measured using a surveying instrument or laser collimator, and the measured position is marked on the building or ground (so-called ink brush) The construction work is done so that the pile and the steel frame are located at the position of this mark. However, there is a problem that such a mark disappears due to other work, and the construction position of the pile and the steel frame becomes unclear.

  In addition, piles and steel frames need to be built so that their postures extend in the vertical direction.After piles and steel frames are built, errors in building piles and steel frames built using surveying instruments and laser collimators Measure and adjust the posture of piles and steel frames. In order to efficiently perform the work of adjusting the postures of such piles and steel frames, it is desirable to display a mark serving as a vertical reference in the space.

In addition, as a technique for displaying a point on a space by laser light, for example, Non-Patent Document 1 strongly concentrates the laser light on one point in the space and allows oxygen and nitrogen molecules in the air near the focal point to be focused. A method is described in which dots are displayed at arbitrary positions in a space by causing plasma emission.
National Institute of Advanced Industrial Science and Technology “Successful experiment on high performance of 3D display technology”, press release announced on July 10, 2007 [online], [searched on May 20, 2008] , Internet <URL: http://www.aist.go.jp/aist_j/press_release/pr2007/pr20070710/pr20070710.html>

  Here, the applicants of the present application considered applying this method when building a pile or a steel frame in the field of construction or civil engineering. However, the point displayed on the space by the method described in Non-Patent Document 1 is that the laser light is focused on one point, so that the light emitting area is very small. For this reason, the point displayed on space by said method is difficult to visually recognize, and there exists a problem that it is difficult to apply to the field of civil engineering or construction.

  The present invention has been made in view of the above problems, and an object of the present invention is to enable a visible point or line to be displayed at a predetermined position in space.

The mark generation device of the present invention is a device that generates a mark that can be visually recognized in space, and a laser irradiation unit that irradiates a laser beam and a laser beam irradiated by the laser irradiation unit is focused and focused. A plasma generating device capable of adjusting the posture and generating a plasma at a position focused by the light collecting unit, and irradiating linear light, and the linear light is focused on the laser light. A linear light generator capable of adjusting a posture so as to pass through a position where the laser beam is connected, and the linear light follows an optical path different from that of the laser light, and the laser light is focused without passing through the condensing unit. and wherein the optimal Rukoto to position connecting the.

In the mark generation device, the focal point of the light collecting unit may be changeable.
In addition, the plasma generator and the linear light generator are fixed to a support member, and the attitude of the plasma generator and the linear light generator can be adjusted by adjusting the attitude of the support member. Good.

  Moreover, the said plasma generator and the said linear light generator may each be attached to the support member so that the attitude | position is adjustable.

The mark generation device of the present invention is a device that displays a dot-like mark at a predetermined position in space so as to be visible, and optically branches the laser light and a laser device that emits laser light. A half mirror, a first mirror that reflects one of the branched laser beams, the posture of which is variable, and the one of the branched laser beams passes through a front stage or a rear stage of the first mirror; A condensing device capable of adjusting a focal length, condensing and focusing the one of the branched laser beams, generating plasma at the focal point, and reflecting the other laser beam branched; comprising a second mirror-profile variable, wherein the other laser beam follows a different light path from said one laser beam, and wherein the optimal Rukoto the focus without passing the light collector .

Further, the mark generation method of the present invention is a method for displaying a dot-like mark at a predetermined position in space so as to be visible, and condensing the laser beam to focus on the predetermined position. Plasma is generated at a focal point, and linear light is irradiated to the predetermined position so as to follow a light path different from that of the laser light so as not to pass through a condensing unit for condensing the laser light. .

The mark generation method of the present invention is a method for displaying a straight line or a curve in a space so as to be visible. The laser beam is focused and focused to generate plasma at the focus, and the focus is generated. Is moved along a straight line or a curve to be displayed, and the linear light is made to follow the optical path different from the laser light to the position where the moving focal point is formed, and passes through a condensing unit for condensing the laser light. It is characterized by irradiating so as to reach .

  When plasma is generated by the plasma generator, fine particles such as water vapor are generated at the position where the plasma in the space is generated. The fine particles such as water vapor generated in this way have a slight spatial spread. For this reason, according to the present invention, since the light of the direct light is scattered by the fine particles by irradiating the fine particles with the straight light from the linear light generator, such as a point, a straight line or a curve that can be visually recognized in the space. Marks can be generated.

Hereinafter, an embodiment of a mark generation device of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram for explaining the principle of displaying dots and lines on a space by the mark generation device of the present embodiment. As described in the column of the prior art, the laser beam 1 is strongly focused on one point in the space by using a condensing device 2 such as a lens, thereby generating plasma at the focal point of the laser beam 1, water vapor, etc. Fine particles 3 are generated. At this time, plasma emission occurs at the focal point of the laser beam 1. However, as described in the prior art section, the plasma emission region is very small, and there is a problem that it is difficult to visually recognize this light.

  Therefore, in the mark generating apparatus of the present embodiment, as shown in FIG. 1B, for example, the region where fine particles are generated by condensing the laser light 1 is irradiated with linear light 4 such as laser light. It was decided. The particles 3 generated at the focal point by condensing the laser beam 1 do not stay near the focal point but diffuse around the focal point. By irradiating the diffused fine particles 3 with the linear light 4, the linear light 4 is scattered by the fine particles 3. Thereby, the area | region which emits light becomes large, and it becomes possible to display the point which can be visually recognized on space.

  Further, in the above description, the case of displaying a point on a space has been described, but it is also possible to display a straight line and a curved line. In such a case, at a position corresponding to a straight line or a curve in space, the focal point of the light collecting device is moved at a high speed, and the focal point is irradiated with linear light in synchronization with this. As a result, a spot that appears to emit light that moves to the eyes of the observer remains as an afterimage, and is visually recognized in a linear form. Furthermore, it becomes possible to display figures of various shapes by combining straight lines and curves.

  When displaying a straight line or a curved line, the focal point of the condensing device may be continuously moved, and the linear light may be irradiated to the focal point in synchronization with the focal point. The point may be moved at a predetermined time interval, and the focal point may be irradiated with linear light in synchronization with the point. Even in the latter case, an afterimage remains and is visually recognized as a continuous straight line or curve.

  Hereinafter, the mark generation apparatus of this embodiment will be described. FIG. 2 is a diagram illustrating a configuration of the mark generation apparatus 10 according to the present embodiment. As shown in the figure, the mark generator 10 of the present embodiment includes a plasma generator 30 and a linear light generator 20 fixed to a rod-like support member 11, and the plasma generator 30 and the linear light generator 20; The controller 40 is electrically connected and transmits a control signal to these devices.

  3A and 3B are diagrams showing the configuration of the linear light generator 20, wherein FIG. 3A is a side view and FIG. 3B is a top view. As shown in the figure, the linear light generator 20 includes a gantry 21 fixed to the support member 11, a horizontal rotator 22 installed on the gantry 21, and a vertical installed on the top of the horizontal rotator 22. The rotation device 23 and the linear light generator 24 held by the vertical rotation device 23 are configured, and a control signal is input from the control device 40.

  The horizontal rotation device 22 rotates the vertical rotation device 23 installed on the upper part by an actuator or the like in a horizontal plane, and the linear light generation unit 24 held by the vertical rotation device 23 corresponds to a control signal input from the control unit. It is a device that is held at an angle.

  The vertical rotation device 23 is a device that rotates the linear light generation unit 24 in the vertical plane by an actuator or the like, and holds the linear light generation unit 24 at an angle according to a control signal input from the control unit.

  The linear light generator 24 is a device that can irradiate linear light that travels linearly. As such linear light, continuous laser light may be used, or light other than laser light may be used as long as the light travels linearly.

  With this configuration, the linear light generator 20 can irradiate the linear light in any direction by rotating the linear light generator 24 in the horizontal direction and the vertical direction according to the control signal and adjusting its posture. It is.

  4A and 4B are diagrams showing the configuration of the plasma generator 30, where FIG. 4A is a side view, FIG. 4B is a top view, and FIG. 4C is a diagram showing the configuration of the plasma generator 34. As shown in the figure, the plasma generator 30 includes a gantry 31, a horizontal rotating device 32, a vertical rotating device 33, and a plasma generating unit 34 held by the vertical rotating device 33. The configurations of the gantry 31, the horizontal rotator 32, and the vertical rotator 33 in the plasma generator 30 are the same as those of the gantry 21, the horizontal rotator 22, and the vertical rotator 23 in the linear light generator 20 described above, respectively. .

  As shown in FIG. 4C, the plasma generation unit 34 includes a laser beam generation unit 35 that generates laser beams, and a laser beam generated by the laser beam generation unit 35 passes through and condenses the laser beam that has passed through. And the light collecting unit 36.

  The laser beam generator 35 is a device that can irradiate a laser beam. As such a laser beam, a plus laser having a large energy is suitable.

  The condensing unit 36 is a device that refracts the passing laser beam by a lens and focuses the laser beam at a predetermined distance (focal length). The focal length is determined according to a control signal input from the control device 40. And a mechanism for changing the focal length. As such a mechanism, for example, a mechanism that changes the focal length by changing the interval between the plurality of lenses 37 can be used.

  Therefore, the plasma generator 30 rotates the plasma generator 34 in the horizontal direction and the vertical direction in accordance with the control signal to adjust the posture thereof, and adjust the focal length of the light collector 36, thereby adjusting the spatial distance. It is possible to place the focal point at an arbitrary position.

The control device 40 includes a graphic information input unit 43, an irradiation information creation unit 42, and a control unit 41.
The graphic information input unit 43 receives input of graphic information related to the three-dimensional position of the graphic displayed on the space by the operator.

  The irradiation information creation unit 42 creates plasma generation device control information and linear light generation device control information related to the movement of the plasma generation device 30 and the linear light generation device 20 based on the graphic information received by the graphic information input unit 43.

  Specifically, when the graphic information received by the graphic information input unit 43 is information indicating that a point is displayed at a predetermined position in space, the irradiation information creating unit 42 causes the plasma generating unit 34 to generate plasma. The horizontal angle of the horizontal rotator 32 of the plasma generator 30, the vertical angle of the vertical rotator 33, and the light condensing so that the point to be generated (that is, the focal point of the laser beam) coincides with a predetermined position included in the graphic information. Horizontal rotation so that the plasma generator control information related to the focal length of the unit 36 is generated, and the linear light irradiated by the linear light generator 24 of the linear light generator 20 passes through the three-dimensional position included in the graphic information Linear light generator control information relating to the horizontal angle of the device 22 and the vertical angle of the vertical rotation device 33 is created.

  Further, in the mark generation device 10 of the present embodiment, when displaying a straight line or a curve in the space, the focal point where the plasma is generated is placed at a predetermined interval on the straight line or the curve at a predetermined time interval. A straight line or a curve is displayed by moving discretely and irradiating the focal point with linear light in synchronism with this. That is, when the graphic information received by the graphic information input unit 43 is information indicating that a straight line or a curve is displayed at a predetermined position in the space, the irradiation information creation unit 42 determines that the focus of the laser light is based on the graphic information. A plurality of points on a specified straight line or curve are moved at predetermined time intervals, and are reciprocated on these straight lines or curves in such a time that an afterimage remains (about 1/30 to 1/20 second). Plasma generator control information relating to the horizontal angle, vertical angle, and focal length of the horizontal rotation device 32, vertical rotation device 33, and light converging unit 36 of the plasma generation device 30 at predetermined time intervals is created, and linear light is generated. The horizontal rotation device 32 and the vertical rotation device 33 at each time are horizontal so that the linear light irradiated by the linear light generation unit 24 of the generation device 20 follows the moving focus and passes through the position of the focus. Time to create a linear light generator control information about the vertical angle.

  Based on the linear light generator control information generated by the irradiation information generator 42, the controller 41 determines the horizontal angle specified by the horizontal rotation device 32 and the vertical rotation device 33 of the linear light generator 20 at this predetermined time. The control signal is output so as to face the vertical angle.

  Similarly, the control unit 41 determines that the horizontal rotation device 32 and the vertical rotation device 33 of the plasma generation device 30 use the information based on the plasma generation device control information created by the irradiation information creation unit 42 at predetermined time intervals. A control signal is transmitted so that the designated horizontal angle and vertical angle are directed, and the focal length of the condensing unit 36 is the focal length designated by this information.

Hereinafter, the flow of displaying a curve three-dimensionally by the mark generation apparatus 10 of the present embodiment will be described with reference to FIG.
First, in STEP 1, the graphic information input unit 43 receives an input of graphic information including a three-dimensional position of a curve by the user.

  Next, in STEP 2, the irradiation information creation unit 42 sets a plurality of points at predetermined intervals on the curve included in the graphic information based on the graphic information received by the graphic information input unit 43. The horizontal angle, the vertical angle, and the focal point of the horizontal rotation device 32, the vertical rotation device 33, and the light converging unit 36 of the plasma generation device 30 at predetermined time intervals so as to locate a plurality of points set at the time intervals. Create plasma generator control information about distance. In addition, the horizontal rotation device 32 and the vertical rotation device 33 of the linear light generation device 20 at each time so that the linear light irradiated by the linear light generation unit 24 passes through the focal position at each predetermined time interval. The linear light generator control information relating to the horizontal angle and vertical angle is created.

  Next, in STEP 3, the control unit 41 turns the horizontal and vertical angles specified by this information based on the plasma generator control information at predetermined time intervals, and further, the condensing unit 36. A control signal is transmitted to the plasma generator 30 such that the focal length of the plasma generator becomes the focal length specified by the plasma generator control information. At the same time, the controller 41 designates the linear light generator 24 of the linear light generator 20 by the linear light generator control information in synchronization with the plasma generator 30 based on the linear light generator control information. A control signal is output so as to face the horizontal angle and the vertical angle.

  As a result, as shown in FIG. 6, the plasma generator 30 forms a focus F at a predetermined time interval at a plurality of points on the curve specified by the graphic information, and generates fine particles at each point. In synchronism, the linear light generator 20 irradiates this point with the linear light. Thereby, as described above, the linear light is scattered by the fine particles, and the region in which light is emitted in the three-dimensional space becomes large, and these points can be visually recognized. In addition, as described above, the focal point F reciprocates on the curve in a period of about 1/30 to 1/20 second, so that the observer moves away from the light emission point as an afterimage. It will be visually recognized as a curve displayed in the space.

  As described above, according to this embodiment, plasma is generated at the focal point F by the plasma generator 30 to generate fine particles such as water vapor near the focal point, and linear light is generated in the region where the fine particles are diffused. Since the apparatus 20 irradiates the linear light, the linear light is scattered by the fine particles diffused around the focal point F, and the area in which the light is emitted in the three-dimensional space becomes large and can be easily recognized.

  Further, the focal point F is moved by the plasma generator 30 to a position corresponding to the curve designated by the graphic information in space, and the linear light generator 20 is synchronized with the plasma generator 30 so that the focal point F is always at the position corresponding to the focal point F. By irradiating with the straight light, the movement of the region that emits the light remains as an afterimage and can be visually recognized as a curve or a straight line displayed in the three-dimensional space. Furthermore, various figures can be displayed by combining curves or straight lines.

  As described above, the mark generation device 10 according to the present embodiment can display a point, a straight line, or a curve that can be visually recognized in the space. Therefore, the mark generation device 10 can also be used for inking work in a building or a civil engineering site. FIG. 7 is a diagram illustrating a state in which the positions of the building windows 50 and the furniture 51 are displayed on the space by the mark generation device 10. In such a case, the mark generation device 10 is installed so as to have a predetermined posture with respect to the reference point, and positional information such as the window 50 and the furniture 51 is input to the control device 40. Thereby, since the window 50 and the furniture 51 are displayed in a three-dimensional manner, for example, the arrangement of the window 50 and the furniture 51 can be visually examined in a three-dimensional manner even during construction work of a building.

  FIG. 8 is a diagram illustrating a state in which the positions of the piles 60 and the steel column 61 are displayed by the mark generation device 10. As shown in the figure, the mark generator 10 displays a straight line at a position corresponding to the pile 60 and the steel column 61, and the pile 60 and the steel column 61 are built with the displayed straight line as a reference, so that the surveying instrument and the laser are built. The built-in error is measured by the collimator, and it is not necessary to perform the adjustment work, so that the construction efficiency can be improved.

  In the present embodiment, when displaying a straight line or a curved line, the focal point F of the plasma generator 30 is moved at a predetermined time interval to a plurality of points set on the straight line or the curved line, and the focal point F is moved to the straight line. Although the light generator 20 irradiates with linear light, the present invention is not limited to this. The focal point F is continuously moved on a straight line or a curve, and the linear light generator 20 is synchronized with the linear light generator 20 at all times. May be irradiated with linear light.

  In this embodiment, the plasma generator 30 is fixed, the focal length is adjusted by the light converging unit 36 of the plasma generator 30, the horizontal angle is adjusted by the horizontal rotation device 32, and the vertical angle is adjusted by the vertical rotation device 33. The focal point F is positioned at a predetermined three-dimensional position, but this is not restrictive. For example, the focal length is fixed and the focal point is set at a predetermined three-dimensional position using a robot arm or the like. The plasma generator 34 may be moved so as to be positioned, or its posture may be changed. In short, any method can be used as long as the focal point can be positioned at a desired three-dimensional position.

  Similarly, in this embodiment, the linear light generator 20 is fixed, and the horizontal angle is adjusted by the horizontal rotation device 22 of the linear light generation device 20 and the vertical angle is adjusted by the vertical rotation device 23 to focus the linear light. However, the present invention is not limited to this, and any method may be used as long as the posture and position can be adjusted so that the linear light passes through the focal point F.

  That is, for example, as shown in FIG. 9, the plasma generator 30 having a fixed focal length is fixed to one end of the support member 11, and the position corresponding to the focal point F of the plasma generator 30 is set to the other end of the support member 11. The linear light generator 20 is fixed so that the linear light passes. As a result, the focal point of the plasma generator 30 is always located at a fixed position with respect to the support member 11, and the linear light generator 20 irradiates the focal point F with the linear light. According to the mark generating apparatus 210 having such a configuration, when a point is displayed at a predetermined position in the three-dimensional space, the mark generating apparatus 210 is placed together with the support member 11 and the focal point F of the plasma generating apparatus 30 at the predetermined position. In the case where a straight line or a curve is displayed on the three-dimensional space, the mark generator 210 is moved along the straight line or the curve along with the support member 11 as shown in FIG. What is necessary is just to move so that the focus F may move continuously.

  In the present embodiment, the position corresponding to the focal point of the plasma generator 30 is irradiated by the single linear light generator 20, but not limited thereto, the plasma generator 30 may be irradiated by a plurality of linear light generators. Good. Thereby, even if the linear light of some linear light generators is obstructed by an obstacle, the focal point can be irradiated by other linear light generators.

  Further, in the present embodiment, the plasma generator 30 and the linear light generator 20 are separately provided. However, these laser light generators (the laser light generator 35 and the linear light generator 24) are shared. It is also possible to configure it integrally. FIG. 10 is a diagram illustrating a configuration of a mark generation device 110 in which a plasma generation device and a linear light generation device are integrated. As shown in the figure, the mark generation device 110 includes a control device 140, a laser light generation device 111, a half mirror 112 that optically branches the laser light generated by the laser light generation device 111, and a half mirror 112. The condensing device 113 through which one of the branched laser beams passes, the three-dimensional rotatable mirror 114 that changes the traveling direction of the laser light that has passed through the condensing device 113, and the other laser branched by the half mirror 112 It is constituted by a three-dimensional rotatable mirror 115 that changes the traveling direction of light. In the present embodiment, the condensing device 113 is arranged at the front stage of the mirror 114, but may be arranged at the rear stage of the mirror 114.

  The condensing device 113 has a function of changing the focal length according to a control signal input from the control device 140. The mirrors 114 and 115 have a function of rotating in multiple axes in accordance with a control signal input from the control device 140 and changing the posture thereof.

The graphic information input unit 143 receives input of graphic information related to the three-dimensional position of the graphic displayed by the operator.
The irradiation information creation unit 142 creates control information related to the attitudes of the mirrors 114 and 115 and the focal length of the light collector 113 based on the graphic information received by the graphic information input unit 143.

  That is, when the graphic information is information indicating that a point is displayed at a predetermined position in space, the laser beam reflected by the half mirror 112, passing through the light collector 113, and reflected by the mirror 114 is The focal length of the condensing device 113 and the attitude of the mirror 114 are determined so as to focus at the position specified by the graphic information, and the laser beam that has passed through the half mirror 112 and reflected by the mirror 115 is specified by the graphic information. The posture of the mirror 115 is obtained so as to pass through the position to be passed, and the obtained information is used as control information.

  Further, when the graphic information is information indicating that a straight line or a curve is displayed at a predetermined position in space, the display information includes the focal point of the laser beam that passes through the light collector 113 and is reflected by the mirror 114. A plurality of points spaced on a straight line or a curve are moved at predetermined time intervals, and reciprocated within a period (about 1/30 to 1/20 second) in which an afterimage remains on the line or curve. As described above, the posture of the mirror 114 and the focal length of the light collecting device 113 are obtained every predetermined time interval. Further, the attitude of the mirror 115 is determined so that the laser light reflected by the mirror 115 passes through the focal position at the corresponding time every predetermined time. The obtained information is used as control information.

  Based on the control information created by the irradiation information creation unit 142, the control unit 141 outputs a control signal to the mirrors 114 and 115 so as to have a posture specified by the control information every predetermined time, and at the same time, A control signal is output to the condensing device 113 so that the focal length becomes the distance specified by the control information.

  Also in the mark generating device 110 having such a configuration, the laser light emitted from the laser light generating device 111 is reflected by the half mirror 112, passes through the light collecting device 113, is reflected by the mirror 114, and is designated by graphic information. By forming a focal point and generating plasma at this point, fine particles such as water vapor are generated at this focal point. Further, the laser beam emitted from the laser beam generator 111, passing through the half mirror 112, and reflected by the mirror 115 irradiates fine particles generated at the focal point. Thereby, a visible point can be displayed on the three-dimensional space. Further, by changing the attitude of the mirror 114 and the focal length of the light collector 113, the above-mentioned focus is moved continuously or discretely at high speed, and the laser beam reflected by the mirror 115 is focused in synchronization with this. It is also possible to display a straight line or a curved line by changing the attitude of the mirror 115 so as to pass through.

It is a figure for demonstrating the principle which displays a point and a line on space by the mark production | generation apparatus of this embodiment. It is a figure which shows the structure of the mark production | generation apparatus of this embodiment. It is a figure which shows the structure of a linear light generator, (A) is a side view, (B) is a top view. It is a figure which shows the structure of a plasma generator, (A) is a side view, (B) is a top view, (C) is a figure which shows the structure of a plasma generation part. It is a flowchart which shows the flow which displays a curve three-dimensionally by the mark production | generation apparatus of this embodiment. It is a figure which shows a mode that the curve is displayed on space, (A) is a top view, (B) is an elevation view. It is a figure which shows a mode that the position of the window of a building, furniture, etc. is displayed in space by the mark production | generation apparatus. It is a figure which shows a mode that the position of a pile or a steel pillar is displayed by the mark production | generation apparatus. It is a figure which shows the mark production | generation apparatus at the time of fixing a plasma generator and a linear light generator to a supporting member. It is a figure which shows the structure of the mark production | generation apparatus of another embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Mark production | generation apparatus 11 Support member 20 Linear light generator 21 Base 22 Horizontal rotation apparatus 23 Vertical rotation apparatus 24 Linear light generation part 30 Plasma generation apparatus 31 Base 32 Horizontal rotation apparatus 33 Vertical rotation apparatus 34 Generation part 35 Light generation part 36 Collection Light unit 37 Lens 40 Control device 41 Control unit 42 Irradiation information creation unit 43 Graphic information input unit 50 Window 51 Furniture 60 Pile 61 Steel pillar 110 Mark generation device 111 Light generation device 112 Half mirror 113 Condensing device 114 Mirror 115 Mirror 140 Control Device 141 Control unit 142 Irradiation information creation unit 143 Graphic information input unit

Claims (7)

A device for generating a visible mark in space,
A laser irradiation unit that irradiates a laser beam and a condensing unit that condenses and focuses the laser beam irradiated by the laser irradiation unit, and generates plasma at a position focused by the condensing unit A plasma generator with adjustable attitude;
A linear light generating device that irradiates linear light, the linear light being capable of adjusting the posture so that the laser light passes through a focused position , and
It said linear light follows a different optical path from said laser beam, mark generation device according to claim optimal Rukoto to the laser beam position the focused without passing through the condenser part. The mark generation device according to claim 1,
The said light collection part can change the focal distance, The mark production | generation apparatus characterized by the above-mentioned. The mark generation device according to claim 1,
The plasma generator and the linear light generator are fixed to a support member, and the posture of the plasma generator and the linear light generator is adjusted by adjusting the posture of the support member. Mark generation device. The mark generation device according to claim 1 or 2,
The said plasma generator and the said linear light generator are each attached to the support member so that the attitude | position is adjustable, The mark generator characterized by the above-mentioned. A device for generating a visible mark in space,
A laser device that emits laser light;
A half mirror that optically branches the laser beam;
A first mirror that reflects one of the branched laser beams and has a variable posture;
A focal point that passes through one of the branched laser beams before and after the first mirror, condenses the focused one of the branched laser beams, and generates plasma at the focal point. A light collecting device capable of adjusting the distance;
A second mirror that reflects the other branched laser beam and whose posture is variable ,
The other laser beam follows a different light path from said one laser beam, mark generation device according to claim optimal Rukoto the focus without passing the light collector. A method for generating a dot-like mark that is visible at a predetermined position in space,
Focus the laser light to focus on the predetermined position, generate plasma at the focus,
A mark generating method, wherein the predetermined position is irradiated with linear light so as to follow an optical path different from that of the laser light so as not to pass through a condensing unit for condensing the laser light . A method for generating a linear or curved mark that is visible in space,
The laser beam is focused and focused to generate plasma at the focus, and the focus is moved along a straight line or curve to be displayed, and the linear light is moved to a position where the moving focus is connected. Is irradiated so as to follow an optical path different from that of the laser beam so as not to pass through a condensing part for condensing the laser beam .

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