HIGH SECURITY LASER POINTER SYSTEM, METHOD AND KEY

Abstract

The present invention relates to a high-security laser pointer system, method, and key that utilizes a diffractive element. The high-security laser pointer key comprises a housing, a laser light-emitting diode, and a beam splitter. The laser pointer access control system comprises: a) a high-security laser pointer key comprising a laser light-emitting diode and a beam splitter; b) a high-security laser pointer lock comprising a diffractive element, a first photodiode, and two or more second photodiodes. The corresponding laser pointer access control method is also related to the invention.

Description

HIGH SECURITY LASER POINTER SYSTEM, METHOD AND KEY FIELD OF INVENTION The present invention relates to access control systems, and more particularly to a high-security laser pointer system, method, and key. BACKGROUND OF THE INVENTION There are access control systems that use traditional keys that have certain properties that make it possible, in one way or another, to copy or imitate the key and, therefore, allow unauthorized access to controlled facilities. Existing access control systems based on computer software can be vulnerable to hackers with sufficient knowledge of computer systems. There are also electro-optical and magnetic card access control systems. These access control systems offer a certain level of security, but they share the same shortcomings: if someone with sufficient knowledge obtains the key or card, it is possible to study its distinctive properties and then copy or imitate them. Most of the weaknesses of existing access systems are related to the ease with which the distinctive properties of the keys or cards that grant access can be duplicated or imitated. Therefore, it is necessary to have an access control system with sufficient security features to prevent the duplication or imitation of the keys used in the system. There are some examples of electro-optical access control systems, such as the one described in US patent 7558170, which describes an optical sensor head that includes: a light source that emits a beam of light; a diffraction unit that receives the beam of light emitted from the light source to generate a plurality of diffracted beams composed of a diffracted beam of order 0 and a diffracted beam of order 1 or higher; a condensation unit that receives the plurality of diffracted beams from the diffraction unit and condenses the beams into an optical recording medium; a beam splitter that receives the plurality of beams reflected from the optical recording medium and splits the beams; and a photodetector that receives the beams split by the beam splitter and emits signals according to the quantities of the light beams received.Furthermore, the zero-order diffracted light beam generated in the diffraction unit is configured as a main beam, and two beams of first-order or higher diffracted light generated in the diffraction unit are configured as a first and second sub-beam. A photodetector with multiple light-receiving portions is also mentioned, and the main beam, first sub-beam, and second sub-beam are received by these portions, respectively. The apparatus further includes a tracking error signal generator that produces a tracking error signal to irradiate a desired track with a beam. However, the patent does not specifically mention the use of a diffractive element on which any image can be recorded. Additionally, patent CN102677969 describes a type of photon key and its use in a light-operated door lock. The described photon key comprises a color signal emitter module that serves to link the optical signal containing encrypted unlocking information. The described light-operated door lock comprises a color signal receiver module; its optical signal is emitted to receive the photon key, which converts the optical signal into a telecommunications signal. Furthermore, the document describes a photon key for use in a light-operated door lock, comprising an optical signal receiver module and characterized in that it includes a decoder module, a microcontroller module, and an electrically controlled main lock body. However, the patent does not mention the use of a diffractive element on which any image can be recorded. As a consequence of the above, efforts have been made to eliminate the drawbacks of currently used access control systems by developing a system, a method, and a high-security laser pointer key that, in addition to using a diffractive element, allows any image to be recorded on the diffractive element. OBJECTS OF THE INVENTION Taking into account the defects of the prior art, it is an object of the present invention to provide a laser pointer system, method, and key that utilizes a diffractive element. Another object of the present invention is to provide a system, a method, and a laser pointer key that allows any image to be engraved on the diffractive element. These and other objects are achieved by means of a system, a method and a high-security laser pointer key in accordance with the present invention. BRIEF DESCRIPTION OF THE INVENTION To this end, a laser pointer key has been invented comprising: a housing, a laser light-emitting diode, and a beam splitter, wherein the laser light-emitting diode is configured to emit a beam of light with a specific wavelength; the beam splitter divides the beam of light into a first split beam and a second split beam, and wherein the housing comprises a first window and a second window, wherein the first split beam of light from the laser light-emitting diode passes through the first window, and the second split beam of light passes through the second window. Another aspect of the invention considers a high-security laser pointer lock characterized in that it comprises: a diffractive element, a first photodiode, at least two or more second photodiodes, and a processing circuit. Another aspect of the invention considers a laser pointer access control system comprising: a) a laser pointer key comprising: a housing, a laser light-emitting diode and a light beam splitter, wherein the laser light-emitting diode is configured to emit a light beam with a certain wavelength, and the light beam splitter divides the light beam into a first split light beam and a second split light beam; b) a high-security laser pointer lock comprising: a diffractive element, a first photodiode, at least two or more second photodiodes, and a processing circuit, wherein the diffractive element receives the second split light beam, splits the second split light beam into at least two diffracted light beams, and projects each diffracted light beam;The first photodiode is configured to: receive one wavelength from the first split light beam, and send a split wavelength signal to the processing circuit; the at least two or more second photodiodes are configured to: receive each diffracted light beam, and send a diffracted wavelength signal to the processing circuit; and the processing circuit is configured to: check whether or not it receives the split wavelength signal from the first photodiode, check whether or not it receives a diffracted wavelength signal from each second photodiode, check whether the signal received by the first photodiode causes the second photodiodes to activate and send an opening signal to a plate if the first photodiode sent the split wavelength signal and each second photodiode sent the diffracted wavelength signal. Another aspect of the invention considers a laser pointer access control method comprising the steps of: a) Emit a beam of light with a specific wavelength using a laser light diode; b) Divide the light beam into a first divided light beam and a second divided light beam using a light beam divider; c) Receive the first beam of light divided by means of a first photodiode; d) Send a split-wavelength signal from the first photodiode to a processing circuit; e) Receive the second beam of light divided by means of a diffractive element; f) Diffraction the second beam of light into at least two diffracted beams of light using the diffractive element; g) Project each diffracted beam of light using the diffractive element; h) Receive each diffracted beam of light by at least two or more photodiodes; i) Send a diffracted wavelength signal through each second photodiode to the processing circuit; j) Check if the first photodiode sent the split wavelength signal through the processing circuit; k) Check if each second photodiode sent the diffracted wavelength signal through the processing circuit; and I) Send an opening signal to a plate if the first photodiode sent the split wavelength signal and each second photodiode sent the diffracted wavelength signal through the processing circuit. BRIEF DESCRIPTION OF THE DRAWINGS The novel aspects considered characteristic of the present invention will be set forth in detail in the appended claims. However, some embodiments, features, and some objects and advantages thereof will be better understood in the detailed description when read in conjunction with the accompanying drawings, in which: Fig. illustrates a longitudinal cross-sectional view of the laser pointer key in an open position, in accordance with a first embodiment of the present invention. Fig. 1b illustrates a cross-sectional view of the laser pointer key in a closed position, in accordance with a first embodiment of the present invention. Fig. 2 illustrates a cross-sectional view of the laser pointer key before it is assembled with a lock, in accordance with a second embodiment of the present invention. Fig. 3 illustrates a cross-sectional view of the laser pointer key when assembled with a lock, in accordance with a second embodiment of the present invention. Fig. 4 illustrates a diagram of the high-security laser pointer method, in accordance with a third embodiment of the present invention. Fig. 5 illustrates a diagram of the high-security laser pointer method, in accordance with a fourth embodiment of the present invention. Fig. 6 illustrates a diagram of the projection of the fourth and fifth light beams through the diffractive element. Fig. 7 illustrates a cross-sectional view of the laser pointer key before it is assembled with a lock, in accordance with a fifth embodiment of the present invention in which the laser pointer key carries with it the diffractive element, which can be interchanged by the user. Fig. 8 illustrates a cross-sectional view of the laser pointer key when assembled with a lock, in accordance with a fifth embodiment of the present invention in which the laser pointer carries the diffractive element. Figs. 9a-9d illustrate examples of diffractive elements of the laser pointer lock. DETAILED DESCRIPTION OF THE INVENTION It has been found that using a diffractive element in a laser pointer access control system improves system security, since the diffractive element allows different images to be recorded on it, giving unlimited combinations of security in the system. Thus, in one aspect of the invention, a laser pointer key is described comprising: a housing, a laser light-emitting diode, and a beam splitter, wherein the laser light-emitting diode is configured to emit a beam of light with a determined wavelength; the beam splitter divides the beam of light into a first split beam and a second split beam, and wherein the housing comprises a first window and a second window, wherein the first split beam of light from the laser light-emitting diode passes through the first window, and the second split beam of light passes through the second window. In one embodiment of the present invention, the determined wavelength of the light beam has a length that is in the range of 300 to 800 nm. In another embodiment of the present invention, the beam splitter directs the second split beam at an angle in the range of -180 to 180° through the second window. Preferably, the beam splitter directs the second split beam at an angle of 90°. In one embodiment of the present invention, the housing further comprises a movable element configured to have an open position and a closed position, wherein in the open position the movable element exposes the second window to the outside and allows the passage of the second split light beam through the window, and in a closed position the movable element covers the second window and prevents the passage of the second split light beam through the window. In a further embodiment of the present invention, the laser pointer key further comprises: a battery that is configured to power the laser light diode. Another aspect of the invention considers a high-security laser pointer lock characterized in that it comprises: a diffractive element, a first photodiode, at least two or more second photodiodes, and a processing circuit, wherein the diffractive element receives the second split beam of light, diffracts the second split beam of light into at least two diffracted beams of light, and projects each diffracted beam of light; the first photodiode is configured to: receive the first split beam of light, and send a split-wavelength signal to the processing circuit; the at least two or more second photodiodes are configured to: receive each diffracted beam of light, and send a diffracted-wavelength signal to the processing circuit; and the processing circuit is configured to: check whether it received the split-wavelength signal, and check whether it received a diffracted-wavelength signal from each second photodiode.and send an opening signal to a plate if the first photodiode sent the split-wavelength signal and each subsequent photodiode sent the diffracted-wavelength signal matching the diffracted-wavelength access signal. In a preferred embodiment, the processing circuit of the laser pointer access control system is further configured to: activate an alarm element when it detects that it is not receiving a signal from the first or every second photodiode. Preferably, the alarm element is a horn. In a preferred embodiment, the light beam splitter can split the laser light diode beam in a ratio of 10% to 90% for the first split light beam and in a ratio of 90% to 10% for the second split light beam. In a preferred embodiment, the diffractive element can be manufactured with an interferometric array. Preferably, the interferometric array can be on-axis or off-axis. Preferably, the interferometric array allows the etching of a specific light image onto the diffractive element, wherein the specific light image on the diffractive element can be of any shape, thereby determining the number of diffracted light beams. More preferably, the diffractive element is made of acrylic or glass. In a preferred embodiment, at least two or more second photodiodes are located where the at least two diffracted light beams are projected, each of the at least two or more second photodiodes coinciding with each of the at least two diffracted light beams. In a preferred mode, when at least one of the at least two diffracted light beams does not coincide with its respective second photodiode of the at least two or more second photodiodes, the alarm element is activated and the processing circuit sends a locking signal to the lock. In a preferred embodiment, at least two or more second photodiodes are in a range of 2 to 100 photodiodes and at least two diffracted light beams are in a range of 2 to 100 diffracted light beams. In another aspect of the invention, a laser pointer access control system is described, comprising: a) a laser pointer key comprising: a housing, a laser light-emitting diode and a beam splitter, wherein the laser light-emitting diode is configured to emit a beam of light with a determined wavelength; the beam splitter divides the beam of light into a first split beam and a second split beam, and wherein the housing comprises a first window and a second window, wherein the first split beam of light from the laser light-emitting diode passes through the first window, and the second split beam of light passes through the second window; b) a high-security laser pointer lock comprising: a diffractive element, a first photodiode, at least two or more second photodiodes, and a processing circuit, wherein the diffractive element receives the second split light beam, diffracts the second split light beam into at least two diffracted light beams, and projects each diffracted light beam; the first photodiode is configured to: receive the first split light beam and send a split-wavelength signal to the processing circuit; the at least two or more second photodiodes are configured to: receive each diffracted light beam and send a diffracted wavelength signal to the processing circuit; and the processing circuit is configured to: check whether it received the split-wavelength signal and check whether it received a diffracted wavelength signal from each second photodiode.and sending an opening signal to a lock if the first photodiode sent the split-wavelength signal and each second photodiode sent the diffracted-wavelength signal coinciding with the diffracted-wavelength access signal, and wherein the lock comprises a housing for receiving the laser pointer key. In a preferred embodiment, the diffractive element is located inside the laser pointer key and not inside the lock. In another embodiment of the present invention, the processing circuit of the laser pointer access control system is further configured to: activate an alarm element when it detects that it is not receiving a signal from the first or every second photodiode. Preferably, the alarm element is a horn. In a preferred embodiment of the present invention, the light beam splitter can split the laser light diode beam in a ratio of 10% to 90% for the first split light beam and in a ratio of 90% to 10% for the second split light beam. In a preferred embodiment of the present invention, the diffractive element can be manufactured with an interferometric array. The interferometric array can be on-axis or off-axis. This interferometric array allows the etching of a specific light image onto the diffractive element. This specific light image on the diffractive element can be of any shape, thereby determining the number of diffracted light beams. Preferably, the diffractive element is made of acrylic or glass. In a further embodiment of the present invention, at least two or more second photodiodes are located where at least two diffracted light beams are projected, each of the at least two or more second photodiodes coinciding with each of the at least two diffracted light beams. If at least one of the at least two diffracted light beams does not coincide with its respective second photodiode, the alarm element is activated and the processing circuit sends a locking signal to the lock. The at least two or more second photodiodes range from 2 to 100 photodiodes. The at least two diffracted light beams also range from 2 to 100. In another aspect of the invention, a laser pointer access control method is described comprising the steps of: a) emit a beam of light with a specific wavelength using a laser light diode; b) divide the light beam into a first divided light beam and a second divided light beam by means of a light beam divider; c) receive the first beam of light divided by means of a first photodiode; d) send a split-wavelength signal from the first photodiode to a processing circuit; e) receive the second beam of light divided by means of a diffractive element; f) diffract the second beam of light into at least two diffracted beams of light using the diffractive element; g) project each diffracted beam of light using the diffractive element; h) receive each beam of diffracted light in each second photodiode from at least two or more second photodiodes; i) send a diffracted wavelength signal through each second photodiode to the processing circuit; j) check if the first photodiode sent the split-wavelength signal through the processing circuit; k) check if each second photodiode sent the diffracted wavelength signal through the processing circuit; and I) send an opening signal to a plate if the first photodiode sent the split wavelength signal and each second photodiode sent the diffracted wavelength signal through the processing circuit. In one embodiment of the present invention, the laser pointer access control method further comprises the steps of: kl) activate an alarm element when the processing circuit detects that at least one second photodiode of the at least two or more second photodiodes did not send the diffracted wavelength signal; and k.2) lock the sheet metal using the processing circuit and end the method. In another embodiment of the present invention, the laser pointer access control method further comprises the steps of: jl) activate an alarm element when the processing circuit detects that it did not receive the split-wavelength signal; and j.2) lock the sheet metal using the processing circuit and end the method. In an alternative embodiment of the present invention, the laser pointer access control method comprises the steps of: a) emit a beam of light with a specific wavelength using a laser light diode; b) divide the light beam into a first divided light beam and a second divided light beam by means of a light beam divider; c) receive the first beam of light divided by means of a first photodiode; d) send a split-wavelength signal from the first photodiode to a processing circuit; e) check if the first photodiode received the split-wavelength signal; f) activate at least two or more second photodiodes when the first photodiode receives the split-wavelength signal; g) receive the second beam of light divided by means of a diffractive element; h) diffract the second beam of light into at least two diffracted beams of light using the diffractive element; i) project each diffracted beam of light using the diffractive element; j) receive each diffracted beam of light by means of each second photodiode from at least two or more second photodiodes; k) send a diffracted wavelength signal through each second photodiode to the processing circuit; I) check if each second photodiode sent a diffracted wavelength signal through the processing circuit; and m) send an opening signal to a plate if every second photodiode sent a diffracted wavelength signal through the processing circuit. In one embodiment of the present invention, the laser pointer access control method further comprises the steps of: hl) activate an alarm element when the processing circuit detects that at least one second photodiode of the at least two or more second photodiodes did not send the diffracted wavelength signal; and h. 2) lock the sheet metal using the processing circuit and end the method. Referring now to figure 11, which illustrates a high-security laser pointer key 1000 comprising: a housing 1100, a laser light-emitting diode 1200 and a light beam splitter 1300, wherein the laser light-emitting diode 1200 is configured to emit a first light beam 1210 with a certain wavelength, and the light beam splitter 1300 divides the first light beam 1210 into a second light beam 1220 and a third light beam 1230. The housing 1100 has a first window 1110 and a second window 1120, where the second light beam 1220 from the laser light-emitting diode 1200 passes through the first window 1110 and the third light beam 1230 passes through the second window 1120. In the figure, a movable element 1130 of the housing 1100 is shown in an open position, so the second window 1120 is exposed to the outside and allows the passage of the third light beam 1230. Figure Ib illustrates the movable element 1130 of the housing 1100 in a closed position, so the second window 1120 is not exposed to the outside. Referring now to figure 2, this illustrates the laser pointer key 1000 with the movable element 1130 in a closed position, wherein the laser pointer key 1000 is disassembled from a laser pointer lock 2000. Figure 3 illustrates the laser pointer key 1000 with the movable element 1130 in an open position, where the laser pointer key 1000 is assembled with the laser pointer lock 2000. Additionally, Figure 3 illustrates a 3000 laser pointer access control system comprising: a) a laser pointer key 1000 comprising: a housing 1100, a laser light-emitting diode 1200 and a light beam splitter 1300, wherein the laser light-emitting diode 1200 is configured to emit a first light beam 1210 with a certain wavelength, and the light beam splitter 1300 divides the first light beam 1210 into a second light beam 1220 and a third light beam 1230; (b) a high-security laser pointer lock 2000 comprising: a diffractive element 2100, a first photodiode 2200, at least two or more second photodiodes 2300, and a processing circuit (not shown), wherein the diffractive element 2100 receives the third light beam 1230, diffracts the third light beam 1230 into at least a fourth and a fifth light beam 2110, and projects each fourth and fifth light beam 2110; the first photodiode 2200 is configured to receive the second light beam 1220 and send a split-wavelength signal to the processing circuit (not shown); the at least two or more second photodiodes 2300 are configured to receive each fourth and fifth light beam 2110 and send a diffracted-wavelength signal to the processing circuit (not shown); and the processing circuit (not shown) is configured for: receiving the split-wavelength signal,to receive a diffracted wavelength signal from every second photodiode 2300, check if the first photodiode sent the split wavelength signal, check if every second photodiode 2300 sent the diffracted wavelength signal, and send an opening signal to a plate 2310 if the first photodiode 2200 sent the split wavelength signal and every second photodiode 2300 sent the diffracted wavelength signal. Additionally, Figure 3 illustrates that the laser pointer access control system 3000 further comprises: an alarm element 2400 that is configured to be activated by the processing circuit (not shown) when the split wavelength signal from the first photodiode or the diffracted wavelength signal from at least one second photodiode is not received. Referring now to Figure 4, which illustrates a 4000 laser pointer access control method comprising the following steps: a) Emit a first beam of light 4100 at a specific wavelength using a laser light diode; b) Divide the first 4200 light beam into a second light beam and a third light beam using a light beam splitter; c) Receive the second light beam 4310 by means of a first photodiode; d) Send a split wavelength signal 4320 from the first photodiode to a processing circuit; e) Receiving the third beam of light 4410 by means of a diffractive element; f) Diffraction the third beam of light 4420 into at least a fourth and a fifth beam of light using the diffractive element; g) Project each fourth and fifth beam of light 4430 using the diffractive element; h) Receive each fourth and fifth light beam 4440 by means of each second photodiode of at least two or more second photodiodes; i) Send a diffracted wavelength signal 4450 through each second photodiode to the processing circuit; j) Check using the processing circuit (not shown) if the first photodiode sent the split wavelength signal 4510; k) Check if every second photodiode 4520 sent the diffracted wavelength signal through the processing circuit; and I) Send an aperture signal 4530 to a plate if the first photodiode sent the split wavelength signal and every second photodiode sent the diffracted wavelength signal through the processing circuit. Additionally, Figure 4 illustrates the laser pointer access control method which further comprises the following steps: kl) Activate an alarm element 4521 when the processing circuit detects that at least one second photodiode of the at least two or more second photodiodes did not send the diffracted wavelength signal; and k.2) Block plate 4522 using the processing circuit and end the method. Furthermore, Figure 4 illustrates the laser pointer access control method, which also includes the following steps: jl) Activate an alarm element 4511 when the processing circuit detects that the first photodiode did not send the split-wavelength signal; and j.2) Block plate 4512 using the processing circuit and end the method. Figure 5 illustrates a laser pointer access control method comprising the following steps: a) Emit a first beam of light 4100 at a specific wavelength using a laser light diode; b) Divide the first 4200 light beam into a second light beam and a third light beam using a light beam splitter; c) Receive the second light beam 4310 by means of a first photodiode; d) Send a split wavelength signal 4320 from the first photodiode to a processing circuit; e) Check if the first photodiode sent the split wavelength signal 4510; f) Activate photodiodes 4513 for at least two or more seconds when the split wavelength signal is received; g) Receiving the third beam of light 4410 by means of a diffractive element; h) Diffraction the third beam of light 4420 into at least a fourth and fifth beam of light using the diffractive element; i) Project each fourth and fifth beam of light 4430 using the diffractive element; j) Receive each fourth and fifth light beam 4440 by means of each second photodiode of at least two or more second photodiodes; k) Send a diffracted wavelength signal 4450 through each second photodiode to the processing circuit; I) Check if each second photodiode sent a diffracted wavelength signal of 4520 through the processing circuit; and m) Send an aperture signal 4530 to a plate if every second photodiode sent a diffracted wavelength signal through the processing circuit. Additionally, Figure 5 illustrates the laser pointer access control method, which also includes the following steps: hl) Activate an alarm element 4521 when the processing circuit detects that at least one second photodiode of the at least two or more second photodiodes did not send the diffracted wavelength signal; and h.2) Block plate 4522 using the processing circuit and end the method. Furthermore, Figure 5 illustrates the laser pointer access control method, which also includes the following steps: gl) Activate an alarm element 4511 when the processing circuit detects that the first photodiode did not send the split-wavelength signal; and g.2) Block plate 4512 using the processing circuit and end the method. Figure 6 illustrates a diagram of the projection of the fourth and fifth diffracted light beams 2110 by means of the diffractive element 2100. Figure 7 illustrates another configuration of the laser pointer key 1000, which incorporates the diffractive element 2100 in the second window 1120. The user can interchange this diffractive element 2100 with any other diffractive element 2100. This figure shows the laser pointer key 1000 outside the laser pointer lock 2000. This indicates that each user can select the photodiodes to be activated based on the diffractive element 2100 they wish to use. Figure 8 illustrates the laser key inside the lock 2000. Where the laser pointer key 1000 carries attached to it in the second window 1120 the diffractive element 2100, which can be exchanged when it is necessary to open the lock 2000. The present invention will be better understood from the following examples, which are presented for illustrative purposes only to allow a full understanding of the preferred embodiments of the present invention, without implying that there are no other unillustrated embodiments that can be put into practice based on the detailed description above. EXAMPLES Example 1. An experiment was conducted to determine the direction in which at least two diffracted light beams 2110 are projected: a fourth and a fifth. The fabrication of the diffractive element 2100 with an interferometric array generates a laser light interference pattern. The interference pattern can form different patterns depending on the object selected when the interference is performed with the interferometric array. If the interferometric array is on-axis, a two-order diffraction phenomenon occurs; if the interferometric array is off-axis, a three-order diffraction phenomenon occurs. When the third light beam 1230 strikes the diffractive element 2100, the diffraction phenomenon occurs, splitting the third light beam 1230 into at least four and five diffracted light beams 2110. The diffraction phenomenon is governed by Bragg's law. 2d Sen (θ / 2) = λ Where: Θ is an interference angle with which the diffractive element was engraved. λ is the wavelength of the laser light used to etch the diffractive element. d is the order of the diffractive element; this order can vary between 1, 0, and -1. Figure 6 illustrates the laser light-emitting diode 1200 emitting a light beam 1210, wherein the light beam splitter 1300 divides the first light beam 1210 into a second light beam 1220 and a third light beam 1230, the second light beam is received by the first photodiode 2200 and the third light beam 1230 is received by the diffractive element 2100 which diffracts the third light beam 1230 into at least a fourth and a fifth diffracted light beam 2110, and which projects each fourth and fifth diffracted light beam 2110, in this case in a diffraction in three orders (1,0,-1) which are received by two or more second photodiodes 2300 respectively. Example 2. Depending on the selected object, different interference patterns can be formed with the interferometric array on diffractive element 2100. Figure 9a illustrates a square interference pattern. Figure 9c illustrates a circular interference pattern. In both cases, the interference patterns were recorded with an on-axis interferometric array. Therefore, as can be seen in Figures 9b and 9d, which correspond to the square and circular interference patterns, respectively, they exhibit two-order diffraction (1 and 0). In accordance with the foregoing, it will be evident to any person skilled in the art that the system modalities and a high-security laser pointer key using a diffractive element as described above and illustrated in the accompanying drawings are merely illustrative and not limiting to the present invention, since numerous substantial changes in their details are possible without departing from the scope of the invention. Therefore, the present invention shall not be considered restricted except as required by prior art and within the scope of the appended claims.

Claims

1. A laser pointer key characterized in that it comprises: a housing, a laser light-emitting diode and a beam splitter, wherein the laser light-emitting diode is configured to emit a beam of light with a determined wavelength; the beam splitter divides the beam of light into a first split beam and a second split beam; the housing comprises a first window and a second window, wherein the first split beam of light from the laser light-emitting diode passes through the first window, and the second split beam of light passes through the second window, and wherein the key is configured to be inserted into a housing of a lock.

2. The laser pointer key according to claim 1, further characterized in that the light emitting diode emits a laser with a wavelength in the range of 300 to 800 nm. 3 - The laser pointer key according to claim 1, further characterized in that the light beam splitter directs the second split light beam at an angle in the range of -180 to 180° through the second window.

4. The laser pointer key according to claim 3, further characterized in that the light beam splitter directs the second split light beam at an angle of 90°.

5. The laser pointer key according to claim 1, further characterized in that the housing additionally comprises a movable element configured to have an open position and a closed position, wherein in the open position the movable element exposes the second window to the outside and allows the passage of the second split light beam through the window, and in a closed position the movable element covers the second window and prevents the passage of the second split light beam through the window.

6. The laser pointer key according to claim 1, further characterized in that the laser pointer key further comprises: a battery that is configured to power the laser light diode.

7. A high-security laser pointer lock characterized in that it comprises: a diffractive element, a first photodiode, at least two or more second photodiodes, and a processing circuit, wherein the diffractive element receives the second split light beam, diffracts the second split light beam into at least two diffracted light beams, and projects each diffracted light beam; the first photodiode is configured to: receive the first split light beam and send a split-wavelength signal to the processing circuit; the at least two or more second photodiodes are configured to: receive each diffracted light beam and send a diffracted wavelength signal to the processing circuit; and the processing circuit is configured to: check whether it received the split-wavelength signal and check whether it received a diffracted wavelength signal from each second photodiode.and send an opening signal to a plate if the first photodiode sent the split-wavelength signal and each subsequent photodiode sent the diffracted-wavelength signal matching the diffracted-wavelength access signal.

8. The high-security laser pointer lock according to claim 7, further characterized in that the processing circuit of the laser pointer access control system is additionally configured to: activate an alarm element when it detects that it does not receive a signal from the first or every second photodiode. 9.- The high-security laser pointer lock according to claim 8, further characterized in that the alarm element is a horn.

10. The high-security laser pointer lock according to claim 7, further characterized in that the light beam splitter can split the light beam of the laser light diode in a ratio of 10% to 90% for the first split light beam and in a ratio of 90% to 10% for the second split light beam.

11. The high-security laser pointer lock according to claim 7, further characterized in that the diffractive element can be manufactured with an interferometric arrangement. 12 - The high-security laser pointer lock according to claim 11, further characterized in that the interferometric arrangement can be on-axis or off-axis.

13. The high-security laser pointer lock according to claim 11, further characterized in that the interferometric arrangement allows the engraving of a specific light image on the diffractive element, wherein the specific light image on the diffractive element can be of any shape, thereby determining the amount of diffracted light beams. 14.- The high-security laser pointer lock according to claim 7, further characterized in that the diffractive element is made of acrylic or glass.

15. The high-security laser pointer lock according to claim 7, further characterized in that the at least two or more second photodiodes are located where the at least two diffracted light beams are projected, each of the at least two or more second photodiodes coinciding with each of the at least two diffracted light beams. 16.- The high-security laser pointer lock according to claim 15, further characterized in that if at least one of the at least two diffracted light beams does not coincide with its respective second photodiode of the at least two or more second photodiodes, the alarm element is activated and the processing circuit sends a locking signal to the lock. 17.- The high-security laser pointer lock according to claim 7, further characterized in that the at least two or more second photodiodes are in a range of 2 to 100 photodiodes and the at least two diffracted light beams are in a range of 2 to 100 diffracted light beams. 18.- A laser pointer access control system characterized in that it comprises: a) a laser pointer key according to any of claims 1 to 6; b) a lock according to any of claims 7 to 17, wherein the lock comprises a housing for receiving a laser pointer key according to any of claims 1 to 6.

19. The laser pointer access control system according to claim 18 further characterized in that the diffractive element is located inside the laser pointer key and not inside the lock.

20. A laser pointer access control method characterized in that it comprises the steps of: a) emitting a beam of light with a predetermined wavelength by means of a laser light-emitting diode; b) splitting the beam of light into a first split beam and a second split beam by means of a beam splitter; c) receiving the first split beam by means of a first photodiode; d) sending a split wavelength signal from the first photodiode to a processing circuit; e) receiving the second split beam by means of a diffractive element; f) diffracting the second beam of light into at least two diffracted beams by means of the diffractive element; g) projecting each diffracted beam by means of the diffractive element; h) receiving each diffracted beam from at least two or more second photodiodes; i) sending a diffracted wavelength signal from each second photodiode to the processing circuit;j) check if the first photodiode sent the split-wavelength signal via the processing circuit; k) check if every second photodiode sent the diffracted-wavelength signal via the processing circuit; and l) send an aperture signal to a plate if the first photodiode sent the split-wavelength signal and every second photodiode sent the diffracted-wavelength signal via the processing circuit.

21. The access control method according to claim 20, further characterized in that the laser pointer access control method further comprises the steps of: k1) activating an alarm element when the processing circuit detects that at least one second photodiode of the at least two or more second photodiodes did not send the diffracted wavelength signal; and k2) locking the lock by means of the processing circuit and terminating the method.

22. The access control method according to claim 20, further characterized in that it further comprises the steps of: j1) Activating an alarm element when the processing circuit detects that it did not receive the split-wavelength signal; and j.2) Locking the lock by means of the processing circuit and terminating the method, 23. A laser pointer access control method characterized in that it comprises the steps of: a) emitting a beam of light with a predetermined wavelength by means of a laser light diode; b) splitting the beam of light into a first split beam and a second split beam by means of a beam splitter; c) receiving the first split beam by means of a first photodiode; d) sending a split wavelength signal from the first photodiode to a processing circuit; e) checking whether the first photodiode received the split wavelength signal; f) activating at least two or more second photodiodes when the first photodiode receives the split wavelength signal; g) receiving the second split beam by means of a diffractive element; h) diffracting the second beam of light into at least two diffracted beams by means of the diffractive element; i) projecting each beam of light diffracted by means of the diffractive element;j) receive each beam of light diffracted by each second photodiode from at least two or more second photodiodes; k) send a signal of the wavelength diffracted by each second photodiode to the processing circuit; l) check if each second photodiode sent a signal of the wavelength diffracted by the processing circuit; and m) send an aperture signal to a plate if each second photodiode sent a signal of the wavelength diffracted by the processing circuit. 24.- The access control method according to claim 23, further characterized in that the laser pointer access control method further comprises the steps of: h.1) Activating an alarm element when the processing circuit detects that at least one second photodiode of the at least two or more second photodiodes did not send the diffracted wavelength signal; and h.2) Locking the lock by means of the processing circuit and terminating the method.