Variable multi-band combined active light source device and method

Abstract

The application provides a variable multi-waveband synthesis active light source device and method, which comprises an active light source synthesis device and a power supply control device; the active light source synthesis device comprises a laser synthesis module arranged on a base and three laser light emitting devices of different wavebands; the power supply control device comprises a master control module and a frequency control module comprising three frequency controllers, each frequency controller corresponding to a waveband laser generator to control the laser emission frequency of the waveband; the laser synthesis module comprises a first lens and a light combining prism, and the three waveband laser beams emitted by the three laser light emitting devices form a synthesized laser output through the light combining prism and the first lens; the application controls the corresponding laser diode light emission frequency by sensing the external light intensity to synthesize laser beams of different colors, and processes the synthesized laser beams by using a light shield, so that the finally emitted active light source can be better observed by electronic devices such as a camera and a camera.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of light source device, especially to a variable multi-band synthesis active light source device and method. BACKGROUND

[0002] Laser generally has the characteristics of direction concentration, high brightness, etc. Laser is mainly applied to industry, medical treatment, agriculture, business and other aspects, and is used for laser positioning and laser calibration in industry, and is used for laser surgery and laser beauty in medical treatment, but laser technology is just starting in laser synthesis.

[0003] Now the active light source of laser synthesis mainly has two kinds, one is to synthesize multiple lasers through a beam combining device to emit a laser with greater power, but its color is single and it is difficult to use as a way of information transmission. The other is to synthesize the same laser by using red, blue and green three-color lasers, and to synthesize lasers of different colors by adjusting the voltage to adjust the brightness of the laser, but this way needs to control the specific voltage value to synthesize, and the emitted laser is difficult to be observed directly by electronic devices such as camera. SUMMARY

[0004] The present application provides a variable multi-band synthesis active light source device and method, which controls the photon emission frequency of the corresponding laser diode within a certain time by sensing the external light intensity, so as to synthesize lasers of different colors, provides different control schemes for laser synthesis, and processes the synthesized laser with a light shield, so that the finally emitted active light source can be better observed by electronic devices such as camera.

[0005] The present application adopts the following technical scheme.

[0006] A variable multi-band synthesis active light source device, the device comprises an active light source synthesis device (1) and a power supply control device (2); the active light source synthesis device comprises a laser synthesis module placed on a base (11), and further comprises three laser light emitting devices of different wavebands; each laser light emitting device is powered by the power supply control device;

[0007] The power supply control device comprises a master control module (22) and a frequency control module comprising three frequency controllers, each frequency controller corresponds to a laser generator of a waveband and is connected thereto to control the laser emission frequency of the waveband;

[0008] The laser synthesis module comprises a first lens (16) and a light combining prism (15), the light combining prism has three light input faces and one light output face, the three light input faces are respectively directed to the light output ends of the three laser light emitting devices, and the light output face is directed to the first lens; the three waveband laser beams emitted by the three laser light emitting devices pass through the light combining prism and the first lens to form a synthesized laser, which is output from the output end of the laser synthesis module.

[0009] The first lens of the laser synthesis module is a plano-convex lens with a flat surface facing the light-combining prism.

[0010] The active light source device further comprises a laser adjusting module with an input end facing the output end of the laser synthesis module; the laser adjusting module comprises a second lens (17) and a light shield (18) arranged in sequence, the second lens being a plano-convex lens with a convex surface facing the light-combining prism; the synthesized laser is intercepted and converged at the light shield after the beam thickness is fixed by the second lens, forming an identifiable light source.

[0011] The three different waveband laser generators are respectively a red light-emitting device (12), a green light-emitting device (13) and a blue light-emitting device (14) located at three light input surfaces of the light-combining prism; each laser generator comprises a laser diode (122) for emitting light and a laser diode driving board (121) connected thereto, and a condenser lens is arranged at the light output end of the laser generator for converging the light of the laser diode into a beam; the laser diode driving board and the condenser lens of each laser generator are of the same specification.

[0012] The frequency control module comprises a blue light frequency controller (23) for controlling the blue light-emitting device, a green light frequency controller (24) for controlling the green light-emitting device and a red light frequency controller (25) for controlling the red light-emitting device; the frequency control module is connected with the main control module and is used for receiving the duty cycle signal output by the main control module, emitting the emission frequency within the required time to the light-emitting device according to the duty cycle signal, and controlling the emission frequency of the laser light-emitting device.

[0013] The duty cycle signal output by the main control module adjusts the emission frequency of the different waveband laser light-emitting devices to adjust the light source color of the synthesized laser at the light shield, and the light source color can be gradually changed during the adjustment.

[0014] The power supply control device further comprises a light intensity sensing module (21) connected with the main control module, which is used for collecting the light intensity data of the current environment and outputting to the main control module, and the main control module forms the required duty cycle signal according to the current light intensity.

[0015] The light-combining prism is arranged in a square groove in the middle of the base, and the power supply control device is located directly below the active light source synthesis device.

[0016] A control method of a variable multi-waveband synthesis active light source, which adopts the variable multi-waveband synthesis active light source device described above, characterized by comprising the following steps.

[0017] Step S1: The light intensity sensing module sends the acquired light intensity to the main control module.

[0018] Step S2: The main control module outputs the corresponding duty cycle to the corresponding frequency control module according to different light intensities;

[0019] Step S3: Each frequency control module sends a transmission signal for a certain period of time to the laser light-emitting device in its corresponding band according to the duty cycle output by the main control module, so as to control the emission frequency of the corresponding laser light-emitting device for a certain period of time.

[0020] Step S4: The three laser light-emitting devices excite different semiconductors respectively, so that the laser diodes emit photons of different frequencies and are focused by the focusing mirror into red, blue and green laser beams. The three laser beams are combined into a composite laser in the same straight line through the laser combining module.

[0021] Step S5: The synthesized laser is emitted by the laser adjustment module with a constant laser point size at both near and far distances. The laser is then processed by a light shield to capture and converge the laser beam, forming a recognizable light source on the light shield. This enables the emission of a variable multi-band synthesized active light source according to different lighting conditions.

[0022] The control method uses laser flashing with different frequency ratios to perform laser color synthesis according to the current lighting environment, so that the composite laser, after being processed by a light shield, is easily recognized by the human eye or electronic devices under the current lighting intensity.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] 1. This invention utilizes a light intensity sensor to emit a composite laser that is more noticeable under the current light intensity.

[0025] 2. This invention uses laser flashing with different frequency ratios to synthesize laser colors. Unlike laser brightness or laser power synthesis, this invention uses a new laser synthesis control scheme.

[0026] 3. This invention can adjust the wavelength and color of the composite laser through a frequency control module, making laser color synthesis simpler, and the laser color changes gradually rather than abruptly.

[0027] 4. This invention solves the problem that laser light sources are difficult to be observed and recorded by electronic devices by using a light shield to process the synthesized laser. Attached Figure Description

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0029] Appendix Figure 1 This is a three-dimensional structural schematic diagram of the device of the present invention;

[0030] Appendix Figure 2is a schematic diagram of the three-dimensional structure of the active light source synthesis device in an embodiment of the present application;

[0031] attached Figure 3 is a schematic diagram of the three-dimensional structure of the power supply control device in an embodiment of the present application;

[0032] attached Figure 4 is a control flow chart of the variable multi-band synthesis active light source synthesis method in an embodiment of the present application;

[0033] attached Figure 5 is a schematic diagram of the three-dimensional structure of the red light emitting device in an embodiment of the present application;

[0034] attached Figure 6 is a schematic diagram of the optical path of the laser synthesis module and the laser adjustment module in an embodiment of the present application;

[0035] In the figure: active light source synthesis device 1, power supply control device 2, base 11, red light emitting device 12, green light emitting device 13, blue light emitting device 14, light combining prism 15, first lens 16, second lens 17, light shield 18, light intensity sensing module 21, master control module 22, blue light frequency controller 23, green light frequency controller 24, red light frequency controller 25;

[0036] laser diode drive board 121, laser diode 122, condenser 123. DETAILED DESCRIPTION

[0037] As shown in the figure, a variable multi-band synthesis active light source device, the device includes an active light source synthesis device 1 and a power supply control device 2; the active light source synthesis device includes a laser synthesis module placed on a base 11, and further includes three different waveband laser light emitting devices; each laser light emitting device is powered by the power supply control device;

[0038] The power supply control device includes a master control module 22 and a frequency control module including three frequency controllers, each frequency controller respectively corresponds to a waveband laser generator and is connected thereto to control the waveband laser emission frequency;

[0039] The laser synthesis module includes a first lens 16 and a light combining prism 15, the light combining prism has three light input faces and one light output face, the three light input faces are respectively directed towards the light output ends of the three laser light emitting devices, and the light output face is directed towards the first lens; the three waveband laser beams emitted by the three laser light emitting devices form a synthesized laser beam through the light combining prism and the first lens, and are output from the output end of the laser synthesis module.

[0040] The first lens of the laser synthesis module is a plano-convex lens with a flat face directed towards the light combining prism;

[0041] The active light source device further comprises a laser adjusting module with an input end facing the output end of the laser synthesis module; the laser adjusting module comprises a second lens 17 and a light shield 18 arranged in sequence, the second lens is a plano-convex lens with a convex surface facing the light synthesis prism; the synthesized laser is intercepted and converged at the light shield after the fixed light beam thickness is adjusted by the second lens, forming an identifiable light source.

[0042] The three different waveband laser generators are respectively a red light emitting device 12, a green light emitting device 13 and a blue light emitting device 14 located at three light input surfaces of the light synthesis prism; each laser generator comprises a laser diode 122 for emitting light and a laser diode driving board 121 connected thereto, and a condenser lens is arranged at the light output end of the laser generator for converging the light of the laser diode into a light beam; the laser diode driving board and the condenser lens of each laser generator are of the same specification.

[0043] The frequency control module comprises a blue light frequency controller 23 for controlling the blue light emitting device, a green light frequency controller 24 for controlling the green light emitting device and a red light frequency controller 25 for controlling the red light emitting device; the frequency control module is connected with the main control module and is used for receiving the duty cycle signal output by the main control module and emitting the emission frequency required within the time to the light emitting device, so as to control the emission frequency of the laser light emitting device.

[0044] The duty cycle signal output by the main control module adjusts the emission frequency of the different waveband laser light emitting device, so as to adjust the light source color of the synthesized laser at the light shield, and the light source color can be gradually changed during the adjustment process.

[0045] The power supply control device further comprises a light intensity sensing module 21 connected with the main control module, which is used for collecting the light intensity data of the current environment and outputting to the main control module, and the main control module forms the required duty cycle signal according to the current light intensity.

[0046] The light synthesis prism is arranged in a square groove in the middle of the base, and the power supply control device is located directly below the active light source synthesis device.

[0047] A control method of a variable multi-waveband synthesized active light source, which adopts the variable multi-waveband synthesized active light source device described above, characterized in that it comprises the following steps:

[0048] Step S1: the light intensity sensing module sends the acquired light intensity to the main control module;

[0049] Step S2: the main control module outputs the corresponding duty cycle to the corresponding frequency control module according to different light intensities;

[0050] Step S3: Each frequency control module sends a certain time of emission signal to the corresponding laser light emitting device of its corresponding waveband according to the duty cycle output by the master module, to control the light emitting frequency of the corresponding laser light emitting device within a certain time;

[0051] Step S4: The three laser light emitting devices respectively excite different semiconductors, so that the laser diodes emit photons of different frequencies which are collected by a condenser into red, blue and green laser beams. The three laser beams pass through a laser synthesis module to synthesize a composite laser beam along a straight line.

[0052] Step S5: The synthesized laser passes through a laser adjustment module to emit laser with constant far and near laser spot size, and is processed by a light shield to intercept and converge the laser beam and form an identifiable light source on the light shield; and a variable multi-waveband synthesized active light source is emitted according to different lighting environments.

[0053] The control method uses laser flashes with different frequency ratios to perform laser color synthesis according to the current lighting environment, so that the composite laser is easy to be recognized by the human eye or electronic equipment after being processed by the light shield under the current lighting intensity.

[0054] In this example, the first lens emits the focused synthesized laser to the second lens, which then converts it into parallel light, and then diverges to form a large-area light source at the light shield, or excites the light-emitting material at the light shield to emit light to form a large-area light source.

[0055] In this example, the distance between the first lens and the second lens is adjustable to cope with the problem of different focal lengths of the synthesized laser due to different colors, so that the light source formed by the synthesized laser at the light shield is more easily recognized in the current lighting environment.

[0056] In this example, the light emitting frequency of the different waveband laser generator changes with the change of the power supply frequency of the laser diode.

[0057] In this example, by changing the light emitting frequency of the different color laser emitting diode, the light color ratio within a fixed time is changed, thereby changing the synthesized light color. The device used in this scheme can be very small, and the light color adjustment can be more flexible and gradual.

[0058] Embodiment:

[0059] Reference Figure 1 This example provides a variable multi-waveband synthesized active light source device, which comprises an active light source synthesis device 1 and a power supply control device 2; the power supply control device 2 is located below the active light source synthesis device 1; please refer to Figure 2The active light source synthesizing device 1 comprises a base 11, light emitting devices (a red light emitting device 12, a blue light emitting device 13, a green light emitting device 14), a laser synthesizing module (a light synthesizing prism 15, a plano-convex mirror 16), a laser adjusting module (a plano-convex mirror 17, a light shield 18); please refer to Figure 3 The power supply control device 2 comprises a frequency control module (a frequency controller 23, a frequency controller 24, a frequency controller 25), an illumination intensity sensing module 21, a master control module 22.

[0060] Preferably, a square groove in the base 11 is left in the middle to match the size of the light synthesizing prism.

[0061] Preferably, the light emitting devices, the laser synthesizing module and the laser adjusting module are all installed on the base 11.

[0062] Preferably, the light emitting devices comprise the red light emitting device 12, the green light emitting device 13 and the blue light emitting device 14, which are located on three sides of the light synthesizing prism 15. Take the red light emitting device 12 as an example, please refer to Figure 5 The red light emitting device 12 comprises a laser diode driving board 121, a laser diode 122 and a condenser 123. The laser diode driving board drives the laser diode to emit photons, and then the photons are gathered into a laser beam through the condenser. Please note that the difference between the light emitting devices of other colors and the red light emitting device is the excited semiconductor, so the frequency of the emitted photons is different, and therefore the color of the gathered laser is different. In addition, the red light emitting device is the same as the red light emitting device, so the red light emitting device is taken as an example.

[0063] Preferably, the laser synthesizing module is fixed in the center of the base, comprising a light synthesizing prism 15 and a plano-convex mirror 16 with a flat surface facing the light synthesizing prism, which combines three lasers into a laser beam.

[0064] Preferably, the laser adjusting module comprises a plano-convex mirror 17 with a convex surface facing the light synthesizing prism and a light shield 18. The plano-convex mirror 17 is used to keep the size of the synthesized laser fixed after being emitted, and the light shield 18 is used to intercept the converged synthesized laser beam and form an identifiable light source in the light shield.

[0065] Preferably, the light shield is located behind the plano-convex mirror 17 relative to the light synthesizing prism.

[0066] Preferably, the pins of the illumination intensity sensing module 21 are connected to the pins of the master control module 22 through copper wires, which are used to collect the current environmental illumination intensity and output to the master control module.

[0067] Preferably, the frequency control module comprises a frequency controller 23 for controlling the blue light emitting device, a frequency controller 24 for controlling the green light emitting device, and a frequency controller 25 for controlling the red light emitting device, and the frequency control module is connected with the master control module, and is used for receiving the duty cycle signal output by the master control module, so as to send the emission frequency in a certain time to the light emitting device, and control the photon emission.

[0068] Preferably, the master control module 22 is used for receiving the light intensity data, so as to output the appropriate duty cycle signal to the frequency control module.

[0069] In the embodiment, a control method of the variable multi-band synthesis active light source device is also provided, and the control method comprises the following steps.

[0070] Step S1: The light intensity module sends the acquired light intensity to the master control.

[0071] Step S2: The master control module outputs the corresponding duty cycle to the corresponding frequency control module according to different light intensities.

[0072] Step S3: The frequency control module sends the emission signal in a certain time to the corresponding light emitting device according to the duty cycle output by the master control module, so as to control the photon emission frequency of the corresponding light emitting device in a certain time.

[0073] Step S4: The three devices respectively excite different semiconductors, so that the laser diode emits photons of different frequencies, and the photons are gathered into red, blue and green lasers through a condenser, the three lasers pass through a laser synthesis module, and the composite laser of the same straight line is synthesized.

[0074] Step S5: The synthesized laser passes through a laser adjusting module, emits laser with constant far and near laser point size, and is processed by a light shield, so that the light source is more easily observed and recorded by electronic equipment or human beings. The variable multi-band synthesis active light source is emitted according to different light environments.

[0075] Preferably, the last active light source can also emit white light through manual setting.

[0076] The above only describes the preferred embodiments of the present application, and any changes and modifications made according to the scope of the patent application of the present application shall be included in the scope of the present application.

Claims

1. A variable multi-band combined active light source device, characterized by: The device comprises an active light source synthesis device (1) and a power supply control device (2); the active light source synthesis device comprises a laser synthesis module placed on a base (11) and three laser light emitting devices of different wave bands; each laser light emitting device is powered by the power supply control device; The power supply control device comprises a master control module (22) and a frequency control module comprising three frequency controllers, each frequency controller corresponding to a wave band of laser light emitting device and being connected thereto to control the laser emission frequency of the wave band; The laser synthesis module comprises a first lens (16) and a light combining prism (15), the light combining prism having three light input faces and one light output face, the three light input faces respectively facing the light output ends of the three laser light emitting devices, and the light output face facing the first lens; the three wave band laser beams emitted by the three laser light emitting devices pass through the light combining prism and the first lens to form a synthesized laser, which is output from the output end of the laser synthesis module; The first lens of the laser synthesis module is a plano-convex lens with a flat surface facing the light combining prism; The active light source device further comprises a laser adjustment module with an input end facing the output end of the laser synthesis module; the laser adjustment module comprises a second lens (17) and a light shield (18) arranged in sequence, the second lens being a plano-convex lens with a convex surface facing the light combining prism; the synthesized laser is intercepted and converged at the light shield after the beam thickness is fixed by the second lens, forming an identifiable light source; The three laser light emitting devices of different wave bands are a red light emitting device (12), a green light emitting device (13), and a blue light emitting device (14) respectively located at the three light input faces of the light combining prism; each laser light emitting device comprises a laser diode (122) for emitting light and a laser diode driving board (121) connected thereto, and a condenser lens is provided at the light output end of the laser light emitting device for converging the light of the laser diode into a beam; the laser diode driving board and the condenser lens of each laser light emitting device are of the same specification; The frequency control module comprises a blue light frequency controller (23) for controlling the blue light emitting device, a green light frequency controller (24) for controlling the green light emitting device, and a red light frequency controller (25) for controlling the red light emitting device; the frequency control module is connected with the master control module and is used for receiving the duty cycle signal output by the master control module and emitting the emission frequency required within the required time to the light emitting device according to the duty cycle signal to control the light emission frequency of the laser light emitting device; The power supply control device further comprises a light intensity sensing module (21) connected with the master control module, which is used for collecting the current light intensity data of the environment and outputting to the master control module, and the master control module forms the required duty cycle signal according to the current light intensity.

2. The variable multi-band combined active light source device according to claim 1, wherein: The duty cycle signal output by the master control module adjusts the light emission frequency of the laser light emitting device of different wave bands to adjust the light source color of the synthesized laser at the light shield, and the light source color adopts a gradual change mode during the adjustment process.

3. The variable multi-band combined active light source device according to claim 1, wherein: The light combining prism is placed in a square groove in the middle of the base, and the power supply control device is located directly below the active light source synthesis device.

4. A control method of a variable multi-band synthesis active light source using the variable multi-band synthesis active light source apparatus according to claim 1, characterized by: The method comprises the following steps: Step S1: the light intensity sensing module sends the acquired light intensity to the master control module; Step S2: the master module outputs corresponding duty cycles to the corresponding frequency control modules according to different light intensities; Step S3: each frequency control module sends emission signals within a certain time to the corresponding laser light emitting devices of the corresponding wave bands according to the duty cycles output by the master module, to control the light emitting frequencies of the corresponding laser light emitting devices within a certain time; Step S4: the three laser light emitting devices respectively excite different semiconductors, so that the laser diodes emit photons of different frequencies which are collected into red, blue and green laser beams by a condenser lens, the three laser beams pass through a laser synthesis module to synthesize a composite laser beam in the same straight line; Step S5: the synthesized laser passes through a laser adjusting module to emit laser with constant spot size, and the laser is processed by a light shield to intercept the converged laser beam and form an identifiable light source on the light shield, so as to emit a variable multi-waveband synthesized active light source according to different light environments.

5. The method of claim 4, wherein the method further comprises: determining a wavelength of the light source; and selecting the wavelength of the light source. The control method uses laser flashes with different frequency duty cycles to perform laser color synthesis operation according to the current light environment, so that the composite laser is easy to be recognized by the human eye or electronic equipment after being processed by the light shield under the current light intensity.

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