KR20090123165A - Method of formming geometric figure using light beam and apparatus for the same - Google Patents

Abstract

PURPOSE: A method for performing a specific surface of a geometric figure using a trace of a reflected light, and an apparatus for performing the same are provided to form a specific curve of a three dimensional figure by using a whole trace of a reflected light. CONSTITUTION: A light source(10) irradiates a light ray with a fixed width. A fixed angle is formed between a center axis and an optical axis of the light ray(L0) irradiated from the light source. A side surface of a cylinder type object is formed into a curved surface, and is positioned on an optical path. An object(20) partially has a cylinder type surface. A screen(30) is vertically installed with the optical axis of the light ray coming from the light source. A rotation center axis of a cylinder longitudinal direction of the cylinder type object is the same as y-axis in a three dimensional space having x-axis, y-axis, and z-axis.

Description

Method of forming geometric shapes using light beams and forming apparatus {method of formming geometric figure using light beam and apparatus for the same}

The present invention relates to a method and apparatus for forming a geometric figure such as a straight line, a curved line, a specific curved surface of a three-dimensional figure using a straight line with a limited width without a large change, and its technical application.

Many physical studies of the nature of light and how to use it have been done. As light propagates around as a kind of electromagnetic waves, it also has a particle-like nature, and light may be thought of as composed of basic particles called photons.

Such light reflects when it meets an object on a propagating path, or enters and passes through the object, and exhibits refraction according to the incident angle.

The laser or flash light travels with a constant width within a limited distance by using the reflector's geometry around the light source. On smooth surfaces of metal or glass, light obeys the law of reflection such that the angle of reflection along with the normal of the surface at the point of incidence is equal to the angle of incidence, as the ball bounces off a flat floor or wall.

Straight light reflects according to Snell's law of reflection, and when it encounters a surface of a certain geometric shape on its path, it reflects and transmits according to its material, and the reflected light and transmitted light form a regular shape, for example, a geometric figure. can do.

Accordingly, the present invention uses a form in which light traveling straight with a certain width is reflected, and implements a characteristic surface of a geometric shape, such as a three-dimensional cone, by using a trajectory formed by the reflected light, or reflects light It is an object of the present invention to provide a method for meeting a different surface to realize a shape, a curve, a straight line such as a circle or an ellipse, and an apparatus for implementing the method.

However, in the present invention, the light forming the geometric figure mainly refers to reflection, but according to the material and location of the object where the light meets, transmitted light (including refractive light) in the transparent material in addition to the reflected light, does not meet the diffracted light and the neighborhood at the object periphery Straight light can also contribute to the geometry.

According to the present invention for achieving the above object, a method of forming a geometric figure using light beams includes preparing and projecting a light source capable of projecting light beams of a certain width going straight, and at least partially forming a cylindrical surface on a straight path of light beams. Cylindrical surface such that the central axis (longitudinal rotational axis) of the cylinder (obtained from the virtual expansion) defined on the cylindrical surface of the object has an angle between 0 and 90 degrees with respect to the straight path of the ray. It is characterized in that at least some of the light rays are reflected from the surface thereof and the reflected light forms a geometric figure.

In the present invention, the cylinder width (diameter) determined based on the cylindrical surface is narrower than or equal to the width of the light beam going straight out of the light source, so that the light beam covers the width portion of the object having the cylindrical surface while diffracting and going straight along with the reflection. This can be done.

Further, in the present invention, the object may be made of a transparent body so that the transmitted light (including light transmitted while refracting at the boundary of the transparent body) may form part of the geometric figure.

In the method of the present invention, the angle between the cylinder central axis and the straight path of the light beam or the optical axis may be fixed at a specific angle, but the cylinder may be fixed until the reflected light or the like forms a geometric shape of a desired shape or size within a range of 0 to 90 degrees. Manipulations can be made to change the angle between the central axis and the optical axis, or the central axis and the optical axis can be continuously changed to create various geometric figures.

According to the present invention for achieving the above object, the geometry forming apparatus using light beams includes a light source for irradiating light beams of a predetermined width, at least a portion of which is formed in a cylindrical surface, and positioned on a path of the light beams, The optical axis of the light beam irradiated from the light source and the central axis of the cylinder obtainable from the cylindrical surface comprise an object at an angle in the range of 0 to 90 degrees so that at least a portion of the light beam is reflected off the cylindrical surface so that At least part of the figure is made.

In the present invention, the object may be made of a transparent material such as cladding of the optical fiber or a metal having high surface reflectivity, and an object having an annular cross section perpendicular to the central axis, such as a cylinder, and filled with a central axis such as a rod. The vertical cross section can be an object that forms the surface.

In the present invention, a separate screen may be installed in front of the light beam going straight on the basis of the position where the light beam and the cylindrical surface meet, the installation angle of the screen to form an angle of 0 to 90 degrees with the optical axis of the straight light beam It can be installed to change the. In the present invention, even if no separate screen is formed, all the objects that meet while the light beams reflect and proceed as a screen can be seen.

The device of the present invention is directed to a light sensing sensor at a location where the straight ray of light meets a cylindrical surface such as an optical fiber cladding, and then goes straight through the surroundings, or where diffracted, transmitted and reflected light meets or a peripheral path thereof. It may be further provided to inform the change of the light sensing state. At this time, the straight, diffracted, transmitted or reflected light forms a side of the cone and is seated on one continuous curved or flat surface that forms the bottom of the cone to form a space surrounded by the side of the cone and the bottom of the cone. The sensing sensor can be configured to inform the movement of an object into and out of space through this conical side.

On the other hand, the apparatus of the present invention can be used as a stage special lighting that uses the aesthetics of the geometric figure formed by the image of the image reflected on the trajectory or the arrival surface of the reflected light. In this case, a light source such as various laser generators of various colors may be used, and a mist generating device may be further provided to form fog or smoke that may show a trajectory of light going straight or reflected.

It is also possible to use at least a portion of the geometry formed by the light rays reflected from the cylindrical surface of the present invention as a working reference line or a surveying auxiliary line. For example, when an object with a cylindrical surface is installed perpendicular to the optical axis of a straight ray of light, horizontal lines, vertical lines, and oblique angles can be obtained depending on the arrangement of the objects, and these straight lines can help surveying. have.

According to the present invention, an object having a light source to form a light beam of a certain width to go straight, a cylindrical surface installed on the path of the light beam, and a simple equipment such as a screen and the operation of the vertical line, horizontal line, diagonal line and various secondary curves The overall trajectory of the reflected lights may form a specific curved surface of the three-dimensional figure.

In addition, a straight line, quadratic curve, and three-dimensional trajectory curved surface on the plane may be used as a means for dividing the plane or space, and when the sensor is provided with a warning sensor to prevent external objects from passing the boundary, an intrusion prevention system may be formed. It may be used in various ways as a textbook aid, a special lighting device, a work baseline creation means, and a survey aid.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a block diagram showing an embodiment of the present invention.

Referring to FIG. 1, the light source 10 for irradiating light beams going straight with a predetermined width and the optical axis and the central axis of the light beam L0 irradiated from the light source are formed at a predetermined angle so that their side surfaces formed as curved surfaces are located on the optical path. At least a portion of the cylindrical object is formed, or an object 20 having a cylindrical surface. In addition, a screen 30 is provided which is installed perpendicular to the optical axis of the light beam that goes straight out of the light source.

For convenience of explanation, the cylinder longitudinal axis of rotation of the cylindrical object coincides with the y axis in a three-dimensional space with three axes, x, y, and z, and the screen is installed parallel to the xz plane at a point h away from the origin. Shall be.

As a light source, a laser generator capable of generating laser light having excellent straightness and a constant width is used. However, in addition to the laser generator, a lantern or a flash light source capable of irradiating a light beam or a light beam having a straightness without changing its width in a certain range of the practical range may also be used as the light source of the present invention.

In this embodiment, the optical axis of the light beam L0 emitted from the light source is in the xy plane and forms a predetermined angle θ with the y axis. The light beam L0 has a wide width w10, which is wider than the cylinder width w20 of the cylindrical object. Thus, if the center of the broad and the center of the cylinder width meet at each other at the origin, the beam encompasses the cylinder while the beam is straight at the periphery and where it meets the cylindrical object, the beam is based on the normal of the corresponding cylindrical surface portion of the cylindrical object. Thus, reflected light is generated in various directions such that the incident angle and the reflected angle are the same.

As a result, the straight component L1 at the periphery of the light beam emitted from the light source does not meet the object and proceeds straight so that it still has an angle of θ with the central axis of the object, and the reflected light L2 generated when the wide center and the center of the cylinder width of the object meet each other. ) And other reflected light also progress when they form an angle θ with the central axis of the object.

Straight and reflected light meets the screen and forms a circle of radius R. Further, the trajectory of the straight light and the reflected light forms a cone CONE having a height h and a radius R of the bottom circle. At this time, R = h.tanθ.

On the other hand, in the present embodiment, a cylindrical object is used as a means for reflecting the light rays emitted from the light source, but any object that forms the surface of the cylinder in the part where the light rays hit is possible. Most preferably, an optical fiber or glass cylinder capable of diffraction, transmission, and reflection of light in consideration of the intensity of light forming a shape may be a cylindrical object of the present invention. However, a rod having the same side as the cylinder is of course also possible, and a semi-cylindrical with a cylinder side only terminated in half, a semi-circle also reflects and some diffraction light, so that a straight line, a quadratic curve, or a three-dimensional figure is specified. It is possible to show geometric figures such as faces. It is also possible to form the cylinder side only in a certain section without forming the cylinder side in all sections, but the smaller the angle between the center axis of the object (cylinder longitudinal axis of rotation in the longitudinal direction) and the optical axis, the longer the section where the ray meets the object. something to do.

Regarding the material and the surface of the object, an object having a cylindrical surface may theoretically be a material capable of partially reflecting light, and a smooth polished surface capable of regularly reflecting light is preferable. However, the object is preferably made of a glass tube or glass rod, such as a highly reflective polished metal or an optical fiber cladding that simultaneously reflects and transmits.

On the other hand, constant width means that there is no big change in width in relatively short centimeter units or meter units, and it is natural that the width becomes wider as the light progresses. The width of light in the light beam generally means a Gaussian distribution of light intensity around the optical axis, and a diameter in a range where the intensity exceeds e ⁻¹ when compared with an arbitrarily determined intensity of the central light. However, it is not necessary to specify in any way, but may be within a range that can be detected by the naked eye or the sensor enough to the intensity of the linear light or the reflected light from the surface of the object in the required range.

FIG. 2 shows that the screen 130 of infinite area is installed parallel to the xz plane as shown in FIG. 1, and the object 120 having a cylindrical surface is formed along an axis parallel to the x-axis, for example. The optical axis of the straight ray L0 is a conceptual diagram showing the form of reflection and transmission of light in the case of coinciding with the y-axis, for example. When the central axis of the light beam and the object central axis meet at a point spaced a certain distance from the origin to the y axis, the light components of the central portion of the wide beam are reflected in the opposite direction to the traveling direction and do not meet the screen 130. At the point where the ray meets the object, the light reaching the portion of the object surface where the radiation meets the y-axis and the angle of 45 degrees of the y-axis among the radiation extending in the yz plane extends to the infinity point of the z-axis and meets the screen 30. The light component passes through the object and reaches around the point (origin) where the screen 130 and the y-axis meet. Therefore, the part where the reflected or straight components meet the screen forms the same vertical line as the z-axis.

Of course, if an object 120 having a cylindrical surface is installed parallel to the z-axis, the line generated by the reflected light in the screen 130 will be the same horizontal line on the x-axis.

FIG. 3 is a conceptual view showing that in a device having the configuration as shown in FIG. 1, when the mounting position and angle of the screen are changed, various secondary curves may be obtained by a circle, an ellipse, a parabola, a hyperbola, etc. to be.

For example, when a flat screen is placed horizontally on the floor, and a laser beam wider than the optical fiber is irradiated from the light source 10 to form a predetermined angle θ with the central axis of the optical fiber on the side of the vertically installed optical fiber, the optical fiber is perpendicular to the screen. The tube meets the screen, resulting in a circular, reflective seat.

In addition, when the angle where the screen itself meets the optical fiber central axis is the same as the inclination angle θ where the light rays meet the optical fiber, the figure that the reflected light touches the screen becomes a parabola.

When the angle at which the screen itself meets the central axis of the optical fiber is greater than the inclination angle θ and smaller than 90 degrees, the figure that the reflected light touches the screen becomes an ellipse, and when the screen itself is parallel to the optical fiber central axis, the figure becomes a hyperbola.

In other words, when the screen cuts the cone on which the light trajectory is drawn horizontally (when the angle of the screen to the ground is 0) (in case of SC1), the cross section (the shape that the reflected light touches the screen) is a circle. When the cone is cut at an angle greater than horizontal (0 degrees) and less than 90-θ (in the case of SC2), the cross section becomes an ellipse, and the screen is at an angle of 90-θ to the ground. When cutting the cone (in the case of SC3), the cross section is a parabola, and when cutting the cone (in the case of SC4) in a perpendicular state to the ground, the cross section is hyperbolic.

4 shows the case where the screen 230 is installed perpendicular to the optical axis of the light beam, not perpendicular to the central axis of the object having the cylinder surface. In this case, as a result, the screen 230 is formed as in the case of SC2 of FIG. 3, and the screen 230 is rotated compared to the embodiment of FIG. 1. Also in this embodiment, using the optical fiber 221 as an object with a cylindrical surface, the optical fiber 221 is placed perpendicular to the disk 223 at the center of the disk 223, the disk is supported on the rotating plate 225 Is connected. Rotating plate 225 is formed to be rotatable in the direction of the arrow to adjust the angle formed with the optical axis of the light beam at the bottom.

Here, too, the direction made by the central axis of the optical fiber and the angle between the straight light and the reflected light are the same as the inclination angle θ.

Prepare and project a laser light source 210 capable of projecting light beams of a certain width to go straight, and the optical axis 221 with a cylindrical object on the path of the light beams, its central axis is a straight path of the light beam and a predetermined tilt angle θ Install at an angle. At this time, while rotating the rotating plate 225 to form an ellipse of the appropriate form on the screen 230.

Here, the angle formed by the optical fiber's central axis with the light path or the optical axis may vary from 0 degrees to 90 degrees, and one point is formed at 0 degrees, and a straight line is formed as shown in FIG. 2 at 90 degrees, and an ellipse is formed therebetween. .

The angle is important when displacing the cylindrical object at an angle to the optical axis, and since the angle is symmetrical with respect to the optical axis, the specific direction of moving the object is not usually a problem in determining the shape of the figure. However, the moving direction (rotation direction) of the cylindrical object may be a problem as to which side the desired figure is formed on the optical axis with respect to the reference point.

3 and 4, when a straight line, diagonal line, or two cylinders are used through the operation of a screen with a cylindrical surface such as a light source such as a simple laser generator or a flash, an optical fiber or a metal rod, and the like, a parallel line is used. It can be used to create various geometric shapes such as quadratic curves and conical sides.These devices can be used as a supplementary textbook in mathematics and other subjects, to inspire students' interests while creating various geometric shapes. Can help explain

For example, two or more straight lines appearing when the laser beam is applied perpendicularly to two or more cylinders can be obtained. As each cylinder is rotated, the corresponding one of the straight lines moves or rotates. Using these straight lines, you can create horizontal lines, vertical lines, and diagonal lines of any angle, or two parallel lines when you create two straight lines. A device using these straight lines may be called a laser ink line. If you create a laser feedline that measures the horizontal tilt, you can also use the two parallel straight lines to measure the tilt of the plane.

Fig. 5 is a sectional view showing an installed cross section of another embodiment of the present invention.

The laser generator 310 and the optical fiber 320 are installed such that the cylinder axis of an object (optical fiber) having an optical axis and a cylindrical surface has a predetermined inclination angle as in the previous embodiments, and a table on which the object 360 is placed. The upper surface 350 of the serves as a screen.

The light rays meet at an oblique side of the optical fiber and reach the table top surface 350 while drawing a cone-shaped trajectory through straightness, transmission, diffraction and reflection. Accordingly, the object 360 on the table is located in a closed space that is blocked from the outside by the cone surface formed by the top surface of the table and the cone side of the linear and reflected light. In this state, the light sensor 330 is densely disposed at the place where the direct light and the reflected light touch the table, or the light sensor is arranged in a line shape so that the light is blocked by an external object entering or leaving the closed space. The alarm 340 may be used to sound an alarm. In this case, the laser light 315 irradiated from the laser generator 310 may use a continuous laser or a pulse laser having a short cycle between optical scans.

This embodiment may be used to prevent theft of an object 360, such as an exhibit, and may be used to form part of a building's access control, intrusion and escape prevention system with the screen as an entire floor within the building.

In this case, it is assumed that the light sensor is placed in the place where straight, transmitted, diffraction and reflected light are touched. However, if the light sensor is installed near the light path, the light reflected by the abnormal object is detected. You can also make the alarm ring.

That is, in the exemplary embodiment of the present invention, the first type sensor may be installed at a portion of the screen where the light reaches the light, and the first type sensor may sound a warning when the light does not reach. In this case, an intrusion boundary system can be formed that warns the invasion of the space surrounded by the conical (elliptical) side of the screen and the bottom of the conical (ellipical) screen formed by the sum of the trajectories of the light reflected or going straight. At this time, the second type sensor is installed in place of the first type sensor installed in the area where the light is to reach or the second type light sensor is installed near the path through which the light passes along with the first type sensor. It can also trigger an alert if detected. In this case, while the intruder intrudes into the space surrounded by the light trajectory, the second type photosensitive sensor detects the light reflected by the intruder and sounds an alert.

Although not shown, in another embodiment of the present invention, the present invention can be used as an apparatus for special lighting of a stage to take advantage of the aesthetics of the geometric figure produced by the reflected trajectory of light rays. In this case, various light sources emitting light rays of various colors may be used, and the screen may also be a flat screen or a stereoscopic screen made of carbon dioxide fog or smoke using dry ice to indicate the trajectory of light rays. Mist generators can be used for stereoscopic screens.

6 is a schematic conceptual diagram showing a use state of another embodiment of the present invention.

A laser generator 410 is installed along with the telescope 440 on the instrument and the reference pole P1 erected at the position G1 knowing its altitude is irradiated. The reference pole pole P1 is provided with a small diameter (thin) in diameter and has a cylindrical surface 420 (h1 from the ground) so that the laser light irradiates this portion, the same principle as in the embodiment of FIG. The horizon spreads out. Some of the reflected light that forms this horizontal line is irradiated to pole P2, which is built at location G2, whose location is unknown. If the position of the reflected light is at the h2 height from the low point of the pole, the instrument checks this to find that the altitude of the point G2 is h1-h2 higher than G1.

Of course, in this embodiment, a level meter may be installed in the instrument, pole, etc. so that the laser light travels horizontally with the plane (geoid surface), and the height h1 from the ground of the portion 420 having the cylindrical surface is adjustable. Can be made.

Although a horizontal line made by laser light is used here, the apparatus of the present invention uses a straight line generator to use a straight line made of a vertical line or an angled diagonal line as a working reference line, or a surveyer using such a straight line as a measurement reference line and a measurement auxiliary line. It can also be used as a device.

For example, although not shown, the light source and the object are installed to be fixed so that the center axis of the cylinder obtained by extending the cylindrical surface in a trend in an object having a cylindrical surface is perpendicular to the optical axis of the light beam projected from the straight light source. You can create a straight line builder, create horizontal lines, vertical lines, and diagonal lines while rotating the optical line builder as needed at an architectural or civil engineering site, and then build on these lines.

In addition, there is a mounting stand to fix the optical linear creator to the mounting table so as to adjust the rotation, and to install the level so that the level can be adjusted to the mounting stand to adjust the pedestal of the trivet, etc. supporting the mounting stand, the horizontal writing machine It is possible to create and use an accurate vertical line and a horizontal line very simply while rotating the straight line generator so that the cylinder central axis of the object having the cylindrical surface of the can be changed from horizontal to vertical with respect to the geoid plane. (If the central axis is positioned perpendicular to the geoid plane, it has the same configuration as the instrument of Figure 6.)

The horizontal lines, vertical lines, and diagonal lines that the laser light reflects, etc., can serve as a reference line for determining whether the paper is attached to the wall vertically and whether the wall of the built-in cabinet is vertical in the interior construction. When excavating a circular tunnel (tunnel whose tunnel wall and ceiling are part of the circumference at the tunnel section) in civil works, such as tunnel excavation work, it is possible to create a circle with a laser beam to establish a certain distance from the wall center to be excavated. By keeping it illuminated, it is possible to mark the standard of the excavation surface or to check the roundness of the excavation.

In the present invention, in the embodiment, the object having the cylindrical surface may have the surface of the cylindrical object at the part where it meets the light beam, and the object itself is not necessarily made of the cylindrical shape, but the transparent cylinder or the light is considered when considering the transmitted light and the diffracted light. It is preferable that it consists of a transparent round rod.

1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a conceptual diagram illustrating the reflection form of light in the case where light reflected from the surface of an object having a cylindrical surface on an infinite area screen forms a vertical straight line.

3 is a conceptual diagram showing that various secondary curves can be obtained at the seating portion of the light beam obtained on the screen when the installation position and angle of the screen are changed.

4 is a block diagram showing an embodiment of the present invention when the screen is installed perpendicular to the optical axis of the light beam.

Fig. 5 is a cross-sectional view showing another embodiment of the device of the present invention.

Figure 6 is a block diagram showing another embodiment of the apparatus of the present invention.

Claims (16)

Prepare and project a light source that can project a certain width of light going straight ahead, A cylinder central axis (lengthwise center of rotation) defined relative to the cylindrical surface of the object having at least partially cylindrical surface on the straight path of the light beam is in the range of 0 to 90 degrees with the straight path of the light beam. And installing the cylindrical surface to form an angle such that reflected light reflected by at least a portion of the light beam from the cylindrical surface creates at least a portion of the geometric figure. The method of claim 1, The width (diameter) of the cylinder obtainable through the cylindrical surface is narrower than or equal to the width of the light beam so that the light beam covers the width portion of the object having the cylindrical surface and diffracts and goes straight with the reflected light. And a light beam forming part of the geometric figure. The method according to claim 1 or 2, The angle formed by the cylinder axis and the optical axis until the desired shape is achieved within a range of 0 to 90 degrees between the central axis of the cylinder and the optical path or the optical axis that can be obtained through the cylindrical surface. Method of forming a geometric shape using a light ray, characterized in that the. A light source for irradiating a certain width of light to go straight, An angle within a range of 0 to 90 degrees, at least a portion of which consists of a cylindrical surface, located on the path of the light beam, such that the optical axis of the light beam irradiated from the light source and the central axis of the cylinder obtainable from the cylindrical surface At least a portion of the light beam is reflected by the cylindrical surface to form at least a portion of the geometric shape forming apparatus comprising an object forming a. The method of claim 4, wherein And the object is a transparent body capable of transmitting a portion of the light beam. The method according to claim 4 or 5, And a cross section of the object perpendicular to the central axis at a position where the light beam meets the light beam forms a ring or a circle. The method of claim 4, wherein At least one of the light source and the object can be moved relative to the other so that the angle formed between the optical axis of the light beam emitted from the light source and the central axis of the cylinder obtainable from the cylindrical surface can be varied. Geometry forming apparatus using light beams. The method of claim 4, wherein A screen installed in front of the light beam that is straight ahead of the position where the light beam meets the cylindrical surface, And an installation angle of the screen may be changed such that an angle between the screen and the optical axis of the light beam that goes straight is 0 to 90 degrees. The method according to claim 7 or 8, A geometric shape forming apparatus using light rays, characterized in that it is used for a math aid textbook to create at least one of a quadratic curve, a straight line, and a conical plane including circles, ellipses, hyperbolas, and parabolas. The method of claim 4, wherein The anti-theft system further includes a light sensing sensor at a location where the light beam is straight, diffracted, transmitted or reflected after the light beams meet the cylindrical surface, or at a path around the light. A geometric shape forming apparatus using light rays, which is used for an access control system. The method of claim 10, The straight, diffractive, transmitted or reflected light forms a side of the cone and is seated on one surface of the bottom of the cone to form a space surrounded by the side of the cone and the bottom of the cone, And the optical sensor is configured to notify the movement of the object into and out of the space through the side of the cone. The method of claim 4, wherein And a stage special lighting using aesthetics of a geometric figure formed by a trajectory of the reflected light after the meeting with the cylindrical surface or the image of the reflected light on the reaching surface. The method of claim 12, And a haze generating device capable of forming fog or smoke which can show the trajectory of the reflected light. The method of claim 4, wherein And at least a portion of the geometry formed by the rays reflected from the cylindrical surface is used as a work reference line or a surveying auxiliary line. The method of claim 14, An optical straight line generator which is provided so that the light source and the object are fixed to each other such that the central axis is perpendicular to the optical axis of the light beam that goes straight; A mount having a level to allow horizontal alignment and fixedly rotatable to fix the straight line creator so that the central axis can be changed from horizontal to vertical with respect to the geoid surface; And a pedestal that is adjustable to install the mounting table horizontally by the spirit level. The method of claim 9, Obtain two or more straight lines which appear when the laser beam is applied perpendicularly to two or more cylinders, and install each of the cylinders rotatably to rotate the straight lines corresponding to each of the cylinders among the straight lines. A geometric shape forming apparatus using light rays, characterized in that the laser lines to form a horizontal line, a vertical line, an oblique line of angle.

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