JP2019152757A - Optical device and communication system - Google Patents

Abstract

To provide an optical device and a communication system that can increase a reach distance and narrow an irradiation range by using a light-emitting diode.SOLUTION: An optical device includes: a first lens barrel provided with a light-emitting diode at a base end side and provided with a diaphragm part for narrowing a beam emitted by the light-emitting diode at a tip side; and a second lens barrel provided at a tip side of the first lens barrel, including a plane-convex lens for outputting the beam that passed through the diaphragm part by suppressing a spread angle of the beam at a tip end, and having an adjustment structure for changing a clearance from the diaphragm part to the plane-convex lens along the optical axis of the beam from the diaphragm part.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an optical device that emits light and a communication system.

  2. Description of the Related Art Conventionally, a light emitting gun toy configured by mounting a light emitting magazine in a magazine housing portion of a gun body is known (see, for example, Patent Document 1).

  This light-emitting gun toy is configured to emit a laser beam instantaneously or for a short period of time by pulling a trigger of the gun body. Thus, when the laser beam is emitted aiming at the target, the optical sensor provided at the target senses the laser beam, so that it can be determined whether or not the target has been hit.

  In this optical device for a light emitting gun toy, a laser beam having high directivity and high energy is used. For this reason, when trying to play a battle game using a light-emitting gun toy, it is necessary to wear sunglasses or the like to protect the opponent's eyes, which is troublesome.

JP 7-174493 A

  Thus, in order to eliminate the troublesomeness when performing a battle game, it is conceivable to configure an optical device using light emitting diodes.

  However, the light emitting diode has low directivity and the light beam spreads. For this reason, the reaching distance is shortened, and the problem that the light beam reaches in an unexpected direction may occur.

  It is an object of the present invention to provide an optical device and a communication system that can increase the reach distance by using a light emitting diode and can narrow the irradiation range.

  In the first aspect, a light-emitting diode is provided on the base end side, and a first lens barrel provided on the distal end side for narrowing a light beam emitted from the light-emitting diode, and provided on the distal end side of the first lens barrel, A plano-convex lens that emits light while suppressing the spread angle of the light beam that has passed through the diaphragm unit is provided at the tip part, and a separation distance from the diaphragm unit to the plano-convex lens is variable along the optical axis of the light beam from the diaphragm unit. A second lens barrel having an adjustment structure.

  That is, the light emitting point of the light emitting diode is not necessarily at the center of the light emitting diode, and the light emitting point of the light emitting diode varies from part to part. In addition, the light emitted from the light emitting diode has low directivity and is likely to spread as compared with the laser beam.

  Therefore, the light emitting diode emits on the base end side of the first lens barrel, and the spread light beam is stopped by the stop portion on the front end side. As a result, a light source starting from the aperture portion can be formed, so that it is possible to suppress the influence caused by variations in the light emitting points.

  The divergent angle of the light beam diverging from the aperture is suppressed by the plano-convex lens provided on the second lens barrel. The second lens barrel can vary the separation distance from the diaphragm unit serving as the light source to the plano-convex lens along the optical axis of the light beam from the diaphragm unit.

  For this reason, the focal length can be changed by adjusting the separation distance from the aperture section to the plano-convex lens. Thus, when the optical device is used as a model gun, the focal length is changed according to a short gun with a short ballistic distance or a machine gun with a long ballistic distance, thereby reducing the reach of the light beam with a predetermined luminous intensity. Can be changed.

  Further, the irradiation range of the light beam can be changed by adjusting the separation distance from the diaphragm unit to the lens. Thereby, generation | occurrence | production of the problem that the light ray to an unexpected direction arrives can be suppressed.

  In a second aspect, the light emitting diode is an infrared LED that outputs infrared rays.

  That is, the light emitting diodes used are not limited to those that output visible light, but may be those that output infrared light.

  In this case, the emitted infrared rays cannot be visually observed. For this reason, for example, when playing a battle game with a model gun using the optical device, it is possible to suppress a problem that the position of the attacker is known.

  The third aspect further includes a control unit that controls the light emitting diode based on communication data and modulates the light emitted by the light emitting diode.

  That is, communication data can be superimposed on a light beam and emitted.

  For this reason, when a battle game is performed with a model gun using the optical device, if the data for specifying the model gun is superimposed on the light beam, it is possible to recognize who was attacked by the bullet. As a result, in a battle game in which teams are divided, it is possible to use such as determining the results for each team based on the hit rate.

  In a fourth aspect, the inner surface of the first lens barrel has a light absorption structure that absorbs light emitted from the light emitting diode.

  That is, a light beam on which data is superimposed is output from the light emitting diode. For this reason, if light rays are irregularly reflected on the inner surface of the first lens barrel and interfere with each other, there is a possibility that data may not be transmitted accurately.

  Therefore, by making the inner surface of the first lens barrel a light absorption structure that absorbs light emitted from the light emitting diode, irregular reflection can be suppressed and erroneous transmission of data can be suppressed.

  A fifth aspect includes the optical device according to the fourth aspect and a receiving unit that receives an optical signal transmitted from a terminal that has received a light beam emitted from the light emitting diode.

  That is, data included in the optical signal can be received by sending the data superimposed on the light beam emitted from the light emitting diode to the terminal and receiving the optical signal transmitted from the terminal by the receiving unit. Thereby, it is possible to communicate with the terminal within the reach of the light beam from the optical device.

  At this time, in the optical device, the irradiation range of the light beam can be changed by adjusting the separation distance from the aperture unit to the lens. Thereby, since the range which can communicate is restrict | limited, compared with the communication system (for example, WiFi) using an electromagnetic wave, the leakage of communication content can be suppressed.

  Since the present invention has the above-described configuration, the reach distance can be increased by using the light emitting diode, and the irradiation range can be narrowed.

It is a side view which shows the short gun type model gun to which the optical apparatus of 1st embodiment is applied. It is a side view which shows the machine gun type model gun to which the optical apparatus of 1st embodiment is applied. It is sectional drawing of the principal part which shows the optical apparatus of 1st embodiment. In the optical apparatus of 1st embodiment, it is explanatory drawing which shows the simulation result which computed the state of the light in the irradiation position of 200 m ahead. It is a block diagram which shows the communication system using the optical apparatus of 2nd embodiment.

<First embodiment>
Hereinafter, a first embodiment will be described with reference to the drawings. FIG. 1 is a view showing a short gun model gun 12 to which an optical device 10 (see FIG. 3) according to the present embodiment is applied. The inner barrel of the short gun model gun 12 is provided with an optical device 10 to be described later. ing. Thereby, when the trigger 14 of the short gun model gun 12 is pulled, the light beam B emitted from the optical device 10 can be emitted from the muzzle 18.

  In this short gun model gun 12, the ballistic distance L is set to be relatively short 50 m, and the diameter D of the irradiation range of the light beam B 50 m ahead is set to 5 mm.

  In addition, the area | region which expanded by the aberration was formed in the outer peripheral part of the irradiation range, and the diameter including this expanded area | region is about 150 mm.

  FIG. 2 is a diagram showing a machine gun model gun 24 to which the optical device 10 according to the present embodiment is applied. The inner barrel of the machine gun model gun 24 is provided with an optical device 10 to be described later. Thereby, when the trigger 14 of the machine gun type model gun 24 is pulled, the light beam B emitted from the optical device 10 can be emitted through the silencer 26.

  The optical device 10 may be incorporated in a silencer 26 attached to the machine gun type model gun 24.

  In this machine gun type model gun 24, the ballistic distance L is set to a relatively long 200 m, and the diameter D of the irradiation range of the light beam B after 200 m is set to 5 mm.

  Similarly to the above, a region spread by the aberration is formed in the outer peripheral portion of the irradiation range, and the diameter including the widened region is about 150 mm.

  FIG. 3 is a diagram showing the optical device 10 used in each of the model guns 12 and 24. The optical device 10 includes a first lens barrel 30 that constitutes the base end side and a second lens barrel that constitutes the front end side. 32.

  The first lens barrel 30 is formed in a cylindrical shape. A convex portion 34 protruding toward the distal end is integrally formed on the distal end surface 30 </ b> A of the first lens barrel 30, and the convex portion 34 has a cylindrical shape centering on the center line C of the first lens barrel 30. Has been. On the outer peripheral surface of the convex portion 34, a male screw 34A is formed over the entire length.

  A substrate mounting hole 36 is formed in the base end face 30 </ b> B of the first lens barrel 30, and the substrate mounting hole 36 is circular with the center line C of the first lens barrel 30 as the center. A substrate 38 is mounted in the substrate mounting hole 36, and the substrate 38 is fixed in a state in which the peripheral portion is in surface contact with the inner wall 36 A of the substrate mounting hole 36.

  A light source housing hole 40 having a smaller diameter than the substrate mounting hole 36 is formed in the inner wall 36A of the substrate mounting hole 36, and the light source housing hole 40 has a circular shape centering on the center line C of the first lens barrel 30. Has been. The light source accommodation hole 40 accommodates a light emitting diode 42 mounted on the substrate 38. As the light emitting diode 42, for example, an infrared LED is used.

  The light emitting diode 42 has a hemispherical light emitting surface 42 </ b> A arranged toward the back wall 40 </ b> A side of the light source accommodation hole 40. The light emitting diode 42 emits infrared light from the light emitting surface 42A, and the spread angle α is 30 degrees.

  In addition, although this embodiment demonstrated the case where infrared LED which light-emits infrared was used, it is not limited to this. For example, you may use LED which light-emits near infrared rays whose wavelength is 800-2500 nm.

  An individual difference adjustment hole 44 having a smaller diameter than the light source accommodation hole 40 is formed in the back wall 40A of the light source accommodation hole 40. The individual difference adjustment hole 44 is centered on the center line C of the first lens barrel 30. It is round.

  The inner diameter of the individual difference adjusting hole 44 is 5 mm, and the length dimension from the end on the light source accommodation hole 40 side to the back wall 44A of the individual difference adjusting hole 44 is 11 mm. Thus, the light beam B from the light emitting diode 42 that spreads with the spread angle α is configured such that the outer peripheral edge of the irradiation range reaches the inner peripheral surface of the individual difference adjusting hole 44 before reaching the back wall 44A.

  An aperture 46 having a diameter smaller than that of the individual difference adjustment hole 44 is formed in the inner wall 44A of the individual difference adjustment hole 44. The aperture hole 46 is a circle centering on the center line C of the first lens barrel 30. It is said that.

  The aperture hole 46 passes through the convex portion 34, and the aperture hole 46 opens at the tip of the first lens barrel 30. The aperture 46 is an aperture that adjusts the irradiation range by narrowing the light beam B from the light emitting diode 42, and the diameter of the aperture 46 is determined in the range of 1 mm to 3 mm depending on the application.

  A diaphragm portion 48 is formed at the distal end portion of the first lens barrel 30 by the diaphragm hole 46, and the light beam B emitted from the light emitting diode 42 is configured such that only the light at the central portion passes through the diaphragm hole 46. Has been.

  A screw hole 50 is formed in the base end surface 32 </ b> A of the second lens barrel 32, and the screw hole 50 is circular with the center line C of the second lens barrel 32 as the center. An adjustment hole 52 is formed in the inner wall 50 </ b> A of the screw hole 50, and the adjustment hole 52 is circular with the center line C of the second lens barrel 32 as the center.

  A lens fixing hole 54 having a diameter larger than that of the adjustment hole 52 is formed on the back side of the adjustment hole 52, and the lens fixing hole 54 has a circular shape centering on the center line C of the second lens barrel 32. Yes.

  The lens fixing hole 54 communicates with the adjustment hole 52, and the lens fixing hole 54 opens at the distal end surface 32 </ b> B of the second lens barrel 32. The lens fixing hole 54 is provided with a circular plano-convex lens 56. By using the plano-convex lens 56, spherical aberration is reduced.

  The plano-convex lens 56 has a convex surface 56A that protrudes toward the distal end side toward the center, and the base end side has a flat surface 56B. The plano-convex lens 56 is fixed in a state in which the peripheral portion of the flat surface 56B is in surface contact with the wall surface 54A of the lens fixing hole 54.

  The plano-convex lens 56 has a diameter dimension of 5 mm, and a thickness dimension from the most protruding position of the convex surface 56A to the flat surface 56B is 1.5 mm. The convex surface 56A has an R of 6.6 mm, and the flat surface 56B has an R of ∞.

  The plano-convex lens 56 is made of glass and uses a lens having a wavelength of 720 nm and a refractive index of 1.5168 (for example, Nobel Arms product number: BSC7 or BK7). The plano-convex lens 56 has a focal length of 11 mm to 14 mm on the diaphragm portion 48 side.

  Accordingly, the plano-convex lens 56 is designed so that the light beam B that has passed through the diaphragm portion 48 can be emitted close to parallel light, and the spread angle β of the light beam B that has passed through the diaphragm portion 48 is determined from the light emitting diode 42. The light beam B is emitted while being suppressed from the spread angle α.

FIG. 4 is a diagram illustrating a simulation result obtained by calculating the light state at the irradiation position 200 m ahead in the optical device 10 according to the present embodiment.
The conditions of the calculation formula are shown below.

Lens diameter (2 × H ′): 8.8 mm
Lens curvature R: 6.6
Lens refractive index N2 (nr): 1.50606
Wavelength λ used in calculation: 740 nm

  The lens was designed at 740 nm, which is the closest to visible light, in the near infrared wavelength range of 740 to 1400 nm.

  From this simulation result, the diameter l2 (F) from the diaphragm 48 to the front surface of the plano-convex lens 56 is set to (H / A) in the formula shown in FIG. (H ′ × 2) can be set to 150 mm.

  A female screw 50B is formed on the inner peripheral surface of the screw hole 50 provided on the proximal end side of the second lens barrel 32, and the convex portion 34 of the first lens barrel 30 is screwed into the screw hole 50. Thus, the male screw 34A of the first lens barrel 30 and the female screw 50B of the second lens barrel 32 are configured to be screwed together.

  Then, according to the screwing amount of the convex portion 34 of the first lens barrel 30 into the screw hole 50 of the second lens barrel 32, the separation distance LK from the diaphragm portion 48 to the plano-convex lens 56 is changed from the diaphragm portion 48. It can be varied along the optical axis B1 of the light beam B. Thus, an adjustment structure 62 that adjusts the focal length is configured by the screw hole 50 of the second lens barrel 32 and the convex portion 34 of the first lens barrel 30.

  In the present embodiment, the optical axis of the light beam B from the light emitting diode 42, the center line C of the first lens barrel 30, the optical axis B1 of the light beam B from the stop 48, and the center of the second lens barrel 32. The case where the line C coincides is shown as an example.

  The inner peripheral surfaces of both lens barrels 30 and 32 are light absorption surfaces 64 that absorb infrared rays, and have a light absorption structure that absorbs the light beam B from the light emitting diode 42. Specific examples thereof include a method of forming the lens barrels 30 and 32 with a black synthetic resin that absorbs infrared rays, or coating the inner peripheral surfaces of the lens barrels 30 and 32 with black that absorbs infrared rays. Can be mentioned.

  A driver 66 that supplies power to the light emitting diode 42 provided on the substrate 38 to emit light is connected to the substrate 38 provided in the first lens barrel 30, and the driver 66 receives a signal from the control unit 68. Based on this, the light emitting diode 42 is caused to emit light. Connected to the control unit 68 is a switch 70 that is turned on in conjunction with the trigger 14 of each model gun 12, 24 and a storage unit 72. The storage unit 72 recognizes the model guns 12, 24. For example, identification data, which is an example of communication data, is stored in a readable manner.

  The control unit 68 is configured by a microcomputer with a built-in ROM and RAM, and the microcomputer is configured to operate according to a program stored in the ROM.

  Thus, when the switch 70 is turned on in accordance with the trigger operation, the control unit 68 reads the identification data stored in the storage unit 72 and outputs a signal based on the identification data to the driver 66. Then, the driver 66 controls the output to the light emitting diode 42 based on the identification data, and modulates the light beam B from the light emitting diode 42 by on / off control.

(Action / Effect)
The effect | action of this embodiment concerning the above structure is demonstrated.

  The light emitting point of the light emitting diode 42 is not necessarily at the center of the light emitting diode 42, and the light emitting point of the light emitting diode 42 varies from part to part. Further, the light beam B emitted from the light emitting diode 42 has low directivity and is likely to spread as compared with the laser beam.

  Therefore, the light emitting diode 42 emits light at the base end side of the first lens barrel 30, and the light beam B spread at the spread angle α is narrowed by the diaphragm 48. As a result, a light source starting from the diaphragm portion 48 can be formed, so that it is possible to suppress the influence of an optical axis shift between the light source and the plano-convex lens 56 due to variations in the light emitting points.

  The spread angle β of the light beam B output from the diaphragm 48 is suppressed by the plano-convex lens 56 provided in the second lens barrel 32. The second lens barrel 32 can vary the separation distance LK from the diaphragm 48 serving as the light source to the plano-convex lens 56 along the optical axis B1 of the light beam B from the diaphragm 48.

  For this reason, the focal length can be changed by adjusting the separation distance LK from the diaphragm 48 to the plano-convex lens 56. Thus, in the present embodiment in which the optical device 10 is used for each of the model guns 12 and 24, the focal length is adjusted according to the short gun type model gun 12 having a short ballistic distance L or the machine gun type model gun 24 having a long ballistic distance L. Can be changed. For this reason, the reach distance of the light beam B can be changed in a state where the predetermined luminous intensity is maintained.

  Further, the diameter D of the irradiation range of the light beam B can be changed by adjusting the separation distance LK from the diaphragm 48 to the plano-convex lens 56. Thereby, generation | occurrence | production of the problem that the light ray B arrives to an unexpected direction can be suppressed.

  For this reason, it is possible to avoid shooting a friend who is nearby with the enemy in the battle game.

  In the present embodiment, an infrared LED that outputs infrared rays is used as the light emitting diode 42.

  Thus, the light emitting diode 42 to be used is not limited to the one that outputs visible light, but may be one that outputs infrared rays.

  In this case, the emitted infrared rays cannot be visually observed. For this reason, when playing a battle game with each model gun 12 and 24 using the optical device 10, for example, it is possible to suppress a problem that the position of the attacker is known.

  And the control part 68 which controls the light emitting diode 42 based on the data for communication, and modulates the light ray B from the light emitting diode 42 is further provided.

  Thereby, the communication data can be superimposed on the light beam B and emitted.

  For this reason, when a battle game is performed with the model guns 12 and 24 using the optical device 10, identification data for identifying the model guns 12 and 24 is superimposed on the light beam B as in the present embodiment. , It is possible to recognize who was attacked by the bullet. As a result, in a battle game in which teams are divided, it is possible to use such as determining the results for each team based on the hit rate.

  Further, the inner peripheral surface of the first lens barrel 30 is constituted by a light absorbing surface 64 that absorbs the light beam B from the light emitting diode 42, and has a light absorbing structure.

  Here, in the present embodiment, the light emitting diode 42 outputs the light beam B on which the identification data is superimposed. For this reason, if the light beam B is irregularly reflected and interferes with the inner peripheral surface of the first lens barrel 30, the identification data may not be transmitted accurately.

  Therefore, by making the inner peripheral surface of the first lens barrel 30 a light absorbing structure that absorbs the light beam B from the light emitting diode 42, irregular reflection can be suppressed and erroneous transmission of identification data can be suppressed.

<Second embodiment>
FIG. 5 is a diagram showing a second embodiment, and shows an example of a communication system 100 constructed using the optical device 10 described above. The communication system 100 is a system that enables communication using the Internet, for example, in a public facility table 104 by using a mobile terminal 102 such as a smartphone having an optical wireless communication function.

  That is, the communication system 100 is provided with the optical device 10 and the receiving device 106 described above for each table 104. As shown in FIG. 3, the optical device 10 is an LED that emits light used when the light emitting diode 42 used in the first embodiment performs optical wireless communication (Li-Fi communication) with the mobile terminal 102. As an example, visible light is used.

  As shown in FIG. 5, the optical device 10 is adjusted from the optical device 10 by adjusting the screwing amount of the first lens barrel 30 into the screw hole 50 of the second lens barrel 32 by the adjusting structure 62. The irradiation range is set so that the light beam B irradiates only the upper surface of the corresponding table 104.

  The receiving device 106 includes a light receiving element that receives a light beam BR transmitted from the infrared light emitting unit of the mobile terminal 102 when performing optical wireless communication (Li-Fi communication), for example, near infrared light. The reception range is determined so that the light beam BR transmitted from the portable terminal 102 can be received.

  An LED driver 110 is connected to the optical device 10, and power is supplied to the LED driver 110 from a power supply unit 112. Further, a modem 114 is connected to the LED driver 110, and the modem 114 is connected to a server 116 of an Internet service provider. The server 116 is connected to the Internet 118, which is a network, and the modem 114 is configured to communicate with the server 120 connected to the Internet 118 via the server 116 so that the content on the server 120 can be used. Yes.

  The modem 114 sends the communication data transmitted from the server 116 to the LED driver 110, and the LED driver 110 outputs this communication data to the optical device 10 as a pulse signal. The optical device 10 to which this pulse signal is input turns on the light emitting diode 42 in accordance with the pulse signal, and modulates the light beam B from the light emitting diode 42. As a result, the lamp driver 110 controls the light emitting diode 42 based on the communication data and configures a control unit that modulates the light beam B from the light emitting diode 42.

  The receiving device 106 is connected to the receiving unit 122, and the receiving unit 122 is connected to the modem 114. The receiving unit 122 takes out the communication data superimposed on the light beam BR from the portable terminal 102 and outputs it to the modem 114 as a digital signal.

  Thereby, it is comprised so that the signal sent from the portable terminal 102 which received the light ray B from the light emitting diode 42 of the optical apparatus 10 can be received by the receiving part 122, The said communication system 100 is a portable terminal. Mutual communication can be established.

  The modem 114 is configured to communicate with the server 116, and communication data sent from the server 116 is sent to the corresponding optical device 10 via the LED driver 110. In addition, the modem 114 sends communication data sent from the mobile terminal 102 via the receiving device 106 and the receiving unit 122 to the server 116. Accordingly, by using the mobile terminal 102, the terminal user can use the content on the server 120 connected to the Internet 118.

  When the light beam B from the optical device 10 does not reach the mobile terminal 102 or the light beam BR from the mobile terminal 102 does not reach the receiving device 106, the communication system 100 ends communication with the mobile terminal 102. And

(Action / Effect)
The effect | action of this embodiment concerning the above structure is demonstrated.

  In the optical device 10 used in the present embodiment, the same operational effects as in the first embodiment can be obtained.

  And in this embodiment, while transmitting the communication data superimposed on the light ray B from the light emitting diode 42 of the optical apparatus 10 to the portable terminal 102, and receiving the signal sent from this portable terminal 102, it becomes a signal. The included communication data can be received. As a result, communication with the portable terminal 102 is possible within the reach of the light beam B from the optical device 10.

  At this time, by adjusting the separation distance LK from the diaphragm 48 to the plano-convex lens 56 in the optical device 10, the irradiation range of the light beam B can be limited to the range of the upper surface of the corresponding table 104. Thereby, since a communicable range can be defined, it is possible to suppress leakage of communication contents as compared with a communication method using radio waves (for example, WiFi).

DESCRIPTION OF SYMBOLS 10 Optical apparatus 20 Ballistic distance 30 1st lens barrel 32 2nd lens barrel 32A Base end surface 32B Front end surface 34A Male screw 42 Light emitting diode 46 Diaphragm hole 48 Diaphragm part 50B Female screw 56 Plano-convex lens 62 Adjustment structure 64 Light absorption surface 68 Control part DESCRIPTION OF SYMBOLS 100 Communication system 102 Portable terminal 108 Light beam 122 Receiving part B Light beam B1 Optical axis LK Separation distance

Claims (5)

A first lens barrel provided with a light emitting diode on the base end side and a diaphragm portion provided on the front end side for narrowing the light emitted by the light emitting diode;
A plano-convex lens provided on the front end side of the first lens barrel and emitting the light beam having passed through the stop portion while suppressing a spread angle is provided at the front end portion, and a separation distance from the stop portion to the plano-convex lens is provided in the stop portion. A second lens barrel having an adjustment structure that varies along the optical axis of the light beam from the unit;
An optical device.   The optical device according to claim 1, wherein the light emitting diode is an infrared LED that outputs infrared rays.   The optical device according to claim 1, further comprising a control unit that controls the light emitting diode based on communication data to modulate a light beam emitted by the light emitting diode.   4. The optical device according to claim 1, wherein an inner surface of the first lens barrel has a light absorption structure that absorbs light emitted from the light emitting diode. 5. An optical device according to claim 3 or claim 4,
A receiver that receives an optical signal transmitted from a terminal that has received a light beam emitted by the light emitting diode;
A communication system comprising: