KR100563231B1 - Conical shape laser beam generating device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for generating a conical laser beam, wherein the laser beam is incident on a cylindrical prism to generate a conical laser beam.

An apparatus for generating a conical laser beam according to the present invention includes a cylindrical prism having a predetermined diameter, and a laser beam generator for injecting a laser beam into an outer circumferential surface of the cylindrical prism, wherein the laser beam generator is formed with a central axis of the cylindrical prism. The laser beam, which is arranged to form a predetermined angle, is incident obliquely to the outer circumferential surface of the cylindrical prism, and is then irradiated in a conical manner in front of the cylindrical prism while reflecting or transmitting from the inside and the outside of the cylindrical prism.

Conical laser beam, cylindrical prism, screen, light sensor, security device

Description

Conical shape laser beam generating device

1 is an explanatory diagram showing a laser dispersion structure according to the prior art,

2 is an explanatory view showing another laser dispersion structure according to the prior art,

3 is a block diagram of a conical laser beam generating apparatus according to the present invention,

3A is a configuration diagram for generating a parallel laser beam according to the present invention;

4 is a front view and a side view simulating the generation of a conical beam by the transmitted light beam of the conical laser beam generator according to the present invention,

5 is a front view and a side view simulating the generation of the conical beam by the reflected light beam of the conical laser beam generator according to the present invention,

6 is a front view in which transmitted light and reflected light of the conical laser beam generator according to the present invention are synthesized,

7 is a block diagram showing a security device using a conical laser beam according to the present invention,

8 is an explanatory diagram showing reflection characteristics of a corner cube;

9 is a block diagram showing a security device using a conical laser beam of another form according to the present invention,

10 is a configuration diagram showing a state in which an optical sensor mounting member is disposed on a cylindrical prism,

11 is a block diagram showing a security device using another type of conical laser beam according to the present invention,

12 is a block diagram of a security device using a conical laser beam according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10 laser beam 20 semi-cylindrical lens

60: incident laser beam 61: reflected light

62: transmitted light 63: cylindrical prism

64: prism 66: circular beam

70 conical beam generator 74 optical sensor

The present invention relates to an apparatus for generating a laser beam, and more particularly, to an apparatus for generating a conical laser beam for generating a laser beam irradiated in a conical shape to a three-dimensional space.

Conventionally, in order to obtain a laser beam spreading at a predetermined angle, it is possible by injecting a laser beam traveling straight in a point shape into a cylindrical cylinder. Referring to FIG. 1, a method of obtaining a laser beam spreading at a predetermined angle through a laser beam going straight into a point shape is provided. When the point-shaped laser beam 10 is incident on the semi-cylindrical lens 20, the point-shaped laser beam is described. In the semi-cylindrical lens through the transmission and refraction process to obtain a laser beam 30 is irradiated while spreading in the air at a predetermined angle. The angle α irradiated while spreading into the air is determined by the radius of curvature and the material of the lens, which is generally not more than 90 degrees.

An improvement of this is a laser beam generator that irradiates a laser beam 360 degrees in an arbitrary plane of the application number 20-2002-0034741. As shown in FIG. 2, the laser beam generator includes a cylindrical prism 100 and a laser beam generator 40.

The laser beam 50 generated from the laser beam generator 40 is incident perpendicularly to the outer circumferential surface 101 of the cylindrical prism 100, and the incident laser beam passes through the cylindrical prism 100 at the outer circumferential surface 101. The laser beam is irradiated 360 degrees in the radial direction of the cylindrical prism 100 while repeatedly transmitting and reflecting.

The above-described conventional laser beam generator can be usefully used in security and security facilities by irradiating the laser beam over 360 degrees in all directions to maximize the space that the laser beam can reach.

However, the security device using the laser beam generating device has a problem that a plurality of laser beam generating devices must be installed to apply to the three-dimensional space because the laser beam is irradiated only on a two-dimensional plane.

In addition, since the incident angle of the laser beam incident on the prism is fixed so that the laser beam is generated only in the planar shape of the cylindrical prism radial direction, there is a problem in that various types of laser beams cannot be generated.

An object of the present invention is to provide a conical laser beam generating device for generating a conical laser beam applicable to a three-dimensional space.

Another object of the present invention is to provide an apparatus for generating a conical laser beam that can change the angle of incidence and the angle of incidence of a cone by adjusting the incident angle of the laser beam incident on the prism.

It is another object of the present invention to provide an apparatus for generating a conical laser beam to generate various types of laser beams by adjusting the installation angle of the screen surface.

In order to achieve the above object, the conical laser beam generator of the present invention,

It consists of a cylindrical prism formed to a predetermined diameter, and a laser beam generator for injecting a laser beam on the outer circumferential surface of the cylindrical prism, the beam generated by the laser beam generator to generate a beam having the same width as the diameter of the cylindrical prism It is desirable to. When a beam having a width equal to the diameter of the prism is incident at an angle with respect to the outer circumferential surface of the cylindrical prism, a part of the incident laser beam is reflected at the outer circumferential surface of the prism and is irradiated while spreading in a conical shape. The beam passing through the outer circumferential surface without reflection passes through the cylindrical prism and then proceeds to the air through the opposite outer circumferential surface. The beam propagating in the air is irradiated in a conical shape like the beam reflected from the outer circumferential surface.

Here, the laser beam generator is provided with an incident angle adjusting device for adjusting the angle of the laser beam incident on the cylindrical prism.

The generating device of the conical laser beam may include a screen installed in front of the cylindrical prism is irradiated with the conical laser beam. The screen is preferably provided with a rotating device for adjusting the screen installation angle to change the shape of the laser beam formed on the screen surface.

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Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the apparatus for generating a conical laser beam according to the present invention.

3 is a block diagram of a conical laser beam generating apparatus according to the present invention. Referring to the drawings, the apparatus for generating a conical laser beam according to the present invention includes a cylindrical prism 63, a laser beam generator (not shown) for injecting a laser beam into the outer circumferential surface of the cylindrical prism 63, and the generated conical laser. It consists of a screen 64 through which the beam is scanned.

The light source (not shown) of the laser beam generator may be a laser beam generator that goes straight in a point shape such as a diode laser or a helium neon laser, and the point beam has a width corresponding to the diameter of the cylindrical prism through the beam converter. It is converted into a parallel laser beam 45 and incident on the cylindrical prism. An example of a beam converter for obtaining the parallel laser beam 45 is shown in Fig. 3A. As shown, when the point-shaped laser beam 40 passes through the semi-cylindrical lens, a scattering beam 42 is obtained which is spread out at a predetermined angle. Passing the distributed beam again through the optical element 43 (shown in the form of a lens in FIG. 3A) for converting the beam path, a parallel laser beam 45 having a predetermined width and running in parallel can be obtained. The above-described beam converter introduces one preferred example, but in addition to the configuration to make a parallel laser beam can be easily obtained through various applications within the technical scope of those skilled in the art, it will be obvious that belongs to the rights of the present invention.

In fact, in order to manufacture a device for irradiating a laser beam, a fixing device and a beam converter of the cylindrical prism 63 and the laser beam generator (not shown) are required, but the fixing device can be implemented by those skilled in the art without any technical difficulties. In the present invention, the fixing device is not directly illustrated, and instead, the arrangement of the cylindrical prism and the laser beam generator will be described.

The parallel laser beam generated by the laser beam generator (not shown) becomes the incident laser beam 60 and is incident on the outer circumferential surface of the cylindrical prism 63 at a predetermined angle Ω.

A portion of the incident laser beam 60 is reflected at the surface of the cylindrical prism 63 at the same angle as the incident angle (90-Ω) to become the reflected light 61, and the rest passes through the cylindrical prism 63 and then On the surface of the cylindrical prism 63, it becomes the transmitted light 62 traveling at the same angle as the incident angle (90-Ω).

In order to make the intensity of the laser beam irradiated conical from the cylindrical prism 63 small in deviation in all directions, various variables must be controlled. Corresponding variables include the coating state of the outer circumferential surface of the cylindrical prism, the curvature change of the outer circumferential surface, and the material of the cylindrical prism. Each of these variables affects the variation of the laser beam intensity individually and also affects the relationship between the variables.

The material of the cylindrical prism 63 may be a high molecular compound, such as acrylic, crystal diamond, white sapphire, ruby, or the like. A pigment may be added to the inside or outside of the cylinder, or a colored ore may be used.

In front of the cylindrical prism 63 is provided a screen 64 to which the reflected light 61 and transmitted light 62 are irradiated.

The reflected light 61 and the transmitted light 62 irradiated on the screen 64 form a circular beam or an elliptic beam 66. The screen 64 may include a rotating device (not shown) for adjusting the screen installation angle so that the shape of the laser beam formed on the screen surface can be changed.

Meanwhile, the laser beam generator (not shown) may include an incident angle adjusting device (not shown) to change the size of the conical laser beam generated by adjusting the angle of the laser beam incident on the cylindrical prism 63. have.

4 is a front view (a) and a side view (b) simulating the generation of a conical beam by the transmitted light of the conical laser beam generator according to the present invention.

Referring to the drawings, the laser beam 60 incident from the rear of the cylindrical prism 63 is refracted according to the law of refraction. That is, when a wave enters and refracts from an isotropic medium to another isotropic medium, the incident surface (surface including the direction of the incident wave and the normal of the boundary plane) and the refracting surface (the direction of the refractive wave and the normal of the boundary plane) Plane) is in the same plane, and a relationship of sin i / sin r = n (constant) is established when the incident angle is i and the refractive angle is r. In this case, n is referred to as the refractive index of the refractive medium with respect to the incident medium.

As a result of the simulation, the transmitted light 62 irradiated to the screen is almost circular.

5 is a front view (a) and a side view (b) of simulating the generation of the conical beam by the reflected light beam of the conical laser beam generator according to the present invention, where the incident laser beam 60 is reflected according to the law of reflection. This is the law of the direction of the incident wave and the reflected wave. The incident wave and the reflected wave are on the same plane perpendicular to the reflection plane, opposite to each other with respect to the normal line perpendicular to the reflection plane, and the reflection angle and the incident angle are the same.

As a result of the simulation, the reflected light 61 forms a circle similar to the transmitted light 62 simulation.

FIG. 6 is a front view in which the transmitted light and the reflected light of the conical laser beam generator according to the present invention are synthesized, and a circle is formed around the cylindrical prism 63.

The reflected light 61 is a circle having a high laser beam irradiation density on the upper side of the circle, whereas the transmitted light 62 has a high irradiation density on the lower side of the circle.

The two circles are slightly off center and do not overlap completely. Here, if the incident angle 90- ?? is changed, the center distance of the circle made by the reflected light 61 and the transmitted light 62 is changed. Therefore, the center distance of the circle can be changed by adjusting the incident angle.

7 is a block diagram showing a security device using a conical laser beam according to the present invention.

Referring to the drawings, the security device of the present invention is a cylindrical prism 300 installed on the upper side and the parallel laser beam 301 incident on the cylindrical prism 300 and the conical beam 310a generated in the cylindrical prism 300 ... 335a and the signal detecting unit 310 for sensing the conical beam. The conical beam and the signal detecting unit reveal that only necessary parts are designated by numbers for convenience.

The conical beam generated in the cylindrical prism is configured to go straight to the signal detection unit. If an intruder is present between the cylindrical prism and the signal detector, the intruder interferes with the progress of the cone beam and the signal is not detected by the signal detector, thereby confirming whether the intruder is intruded. The signal detection unit 310. 355 generally uses an optical sensor for sensing light. In FIG. 7, only ten optical sensors are illustrated, but these are illustrated for description, and dozens of optical sensors may be installed and used as necessary.

In addition, the security device receives a signal sensed by the signal detector, a central control unit (not shown) for determining whether the intruder intrusion, and an output unit (not shown) for outputting the result determined by the central control unit (not shown) ) Is included.

The central control unit (not shown) is programmed to determine whether an intruder has entered the detection area through the transmitted signal, and the result of the check is transmitted to the administrator through an output unit (not shown). The output unit (not shown) may additionally be provided with a warning sound generating unit for generating an alert sound to notify the administrator when it is determined that the intruder invaded, and a display unit for displaying on the screen whether or not the intruder.

8 shows the reflection characteristics of the corner cube, which is one of the optical path changing means used in another security device. 8A, 8B, and 8C show the behavior of the reflected beams 231, 241, and 251 with respect to the incident beams 230, 240, and 250. The incident beams 230 and 8B of FIG. The incident beam 240 of FIG. 8 and the incident beam 250 of FIG. 8C are not parallel to each other, but in FIG. 8A, the reflected beam 231 and FIG. 8B of the incident beam 230 are shown in FIG. The reflected beam 241 for the incident beam 240 and the reflected beam 251 for the incident beam 250 in FIG. 8C are parallel. That is, the corner cube has a feature of generating a reflected beam that is reflected parallel to the incident beam even when the beam is incident at any angle.

9 shows another security device, and further includes beam path changing means 410... 455 to the security device described in FIG. 7, and the signal detecting means 470 is a cylindrical prism 400. It is installed around. As shown, the parallel laser beam 401 is incident on the cylindrical prism 400 and then reflected or transmitted to generate a cone beam 410a... 435a, the cone beam is beam path changing means 410. Reflected beam 410b reflected through 455... 435b proceeds to signal detection unit 470. As described above, if there is an intruder between the beam path changing means 410... 455 and the signal detector 470, the beam is not detected by the signal detector, and thus the intruder can be checked.

FIG. 10 illustrates an arrangement state of the cylindrical prism 400 and the signal detecting unit 470 of FIG. 9. In order to smoothly mount the signal detection unit on the cylindrical prism, an optical sensor 471... 476 is installed on the outer surface of the optical sensor mounting member 490 having a flexible band shape. The optical sensor is arranged such that the reflection beams 410b..435b of the security device shown in FIG. 9 are incident. The optical sensor is required wires for transmitting the power supply and sensed signal, but is omitted for convenience in this figure.

Fig. 11 shows yet another security device, which is a signal detection unit arranged in an arbitrary position in the security device shown in Fig. 9 above. As shown, the parallel laser beam 501 is incident on the cylindrical prism 500 and then reflected or transmitted to generate a conical beam 510a... 535a. The conical beam is beam path changing means 510. Reflected beam 510b... 535b reflected through. 535 proceeds to signal detection unit 510c .. 535c. As described above, if an intruder is present between the beam path changing means 510... 535 and the signal detector 510 c .. 535 c, the beam is not detected by the signal detector and thus the intruder is checked. Can be.

12 is a block diagram of a security device using a conical laser beam according to the present invention.

The security device is largely composed of a laser beam generator, a conical beam generator, a signal detector, a central controller, and an output.

The laser beam generator 610 has a power supply unit 600 for supplying power, and the laser beam generated from the laser beam generator 610 is converted into a conical beam through the cone beam generator 620. In the reflector 630 for reflecting the beam generated by the conical beam generator 620, a corner cube is used because of the convenience of installation, but any optical element that can be reflected is not limited to the corner cube. Do. The reflected beam reflected by the reflector 630 is incident on the signal detector 640. In the present invention, a light receiving element is used as the signal detector 640. The signal generated from the signal detector 640 is transmitted to the central controller 660 through the interface unit. The central controller 660 is programmed to identify which intruder has entered the detection area through signals transmitted from a plurality of light receiving elements, and the confirmation result is transmitted to the manager through the output unit 670. The output unit 670 may additionally be provided with a warning sound generating unit 671 and the display unit 672.

The operation of the conical laser beam generator and the security device according to the embodiment of the present invention having the above configuration will be described.

When the laser beam generated by the laser beam generator is incident on the outer circumferential surface of the cylindrical prism, the laser beam generator is separated into reflected light and transmitted light. The reflected light and the transmitted light are irradiated while radiating a circular beam or an elliptical beam on the screen, respectively, to form a conical solid having the vertex of the incidence point of the prism.

The security device using the conical laser beam formed as described above detects the laser beam through a plurality of optical sensors on the screen. If an intruder exists between the cylindrical prism and the conical laser beam formed between the screen, the beam is not transmitted to the optical sensor and the central controller checks whether the intruder exists. The central controller generates a warning sound according to the determination result and outputs an intrusion state on the screen.

In addition, in the case of a security device using the light path changing means, if there is an intruder between the cylindrical prism and the corner cube, the beam is not transmitted to the light receiving element, and the signal change of the light receiving element is detected, so that the intruder can be easily checked.

As described above, the generating device and the security device of the conical laser beam according to the present invention by injecting the laser beam at a predetermined angle to the cylindrical prism to generate a three-dimensional conical laser beam security system of three-dimensional space with one laser beam generator This has the effect of enabling setting.

In addition, the generating device and the security device of the conical laser beam according to the present invention has the effect of changing the vertex angle and the incident angle of the conical shape as desired by being able to adjust the incident angle of the laser beam incident on the prism.

In addition, the generating device and the security device of the conical laser beam according to the present invention has the effect of generating various types of laser beams such as circles, ellipses, parabolas, hyperbolas, straight lines by adjusting the installation angle of the screen surface.

In the detailed description of the present invention as described above, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

Claims (11)

Cylindrical prism formed to a predetermined diameter and a laser beam generator for injecting a laser beam on the outer peripheral surface of the cylindrical prism, The laser beam generator is arranged such that the laser beam generated by the laser beam generator forms a predetermined angle with the central axis of the cylindrical prism, the laser beam is incident to the outer peripheral surface of the cylindrical prism inclined at a predetermined angle, the incident laser A part of the beam is reflected from the outer circumferential surface of the prism and is irradiated while spreading in a conical shape, and the beam that passes through the outer circumferential surface without reflecting among the laser beams is irradiated while passing through the inner circumferential surface of the prism and passing through the opposite outer circumferential surface and spreading in a conical shape. An apparatus for generating a conical laser beam. The method of claim 1, And a laser beam generated by the laser beam generator is a parallel laser beam having a width equal to the diameter of the cylindrical prism. The method according to claim 1 or 2, The laser beam generator for generating a laser beam incident on the cylindrical prism is an apparatus for generating a conical laser beam, characterized in that the incident angle adjusting device is provided to adjust the angle of the laser beam incident with respect to the central axis of the cylindrical prism. delete delete delete delete delete delete delete delete

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