CN115499970A - Monochromatic light source based on high-power LED optical fiber coupling output - Google Patents
Monochromatic light source based on high-power LED optical fiber coupling output Download PDFInfo
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- 239000013308 plastic optical fiber Substances 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
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- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/165—Controlling the light source following a pre-assigned programmed sequence; Logic control [LC]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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Abstract
The invention provides a monochromatic light source based on high-power LED optical fiber coupling output, which mainly comprises a light source, a coupling unit, a driving unit, a feedback unit and a human-computer interaction unit. The light source module adopts a high-power LED light source, and the singlechip controls the related amplifying circuit to drive the LED light source to light. The coupling unit is composed of a coupling system and an output medium (optical fiber), and the coupling system and the output medium (optical fiber) are fixed on the same load platform in a front-back mode. The driving unit adopts a single chip microcomputer to realize the control of the stepping motor, and the stepping motor drives the screw rod to rotate so as to drive the load platform to translate, so that the coupling unit on the load platform can be aligned, coupled and output with different LED light sources. The feedback unit consists of a grating ruler and a feedback circuit thereof, wherein the grating ruler is arranged in parallel to the lead screw, the actual position of the coupling unit is measured by the grating ruler after each position switching, and the position of the coupling unit is accurately adjusted by the singlechip according to feedback parameters. The man-machine interaction unit consists of a digital board, a display screen and a single chip microcomputer, wherein the required monochromatic light wavelength is input into the digital board, the single chip microcomputer controls the system to generate and output the monochromatic light according to the input wavelength, and the required wavelength and the real output wavelength are displayed and input on the display screen.
Description
Technical Field
The invention relates to the field of special light sources for photoelectric application, in particular to a monochromatic light source based on high-power LED optical fiber coupling output.
Background
In recent years, in experimental operations such as biochemical analysis, substance component identification, fluorescence excitation and the like and practical applications, many illumination requirements which cannot be met by common illumination exist, such as requirements for high precision of specific wavelength, high color rendering of illumination, high safety in flammable and explosive environments and the like.
The emerging optical fiber illumination technology better solves the problems faced by traditional illumination. Most of products in the market for the purpose use xenon lamps, tungsten lamps and the like as basic light sources, and light is split through optical devices such as prisms, gratings and the like, so that low-power monochromatic light with narrow line width is obtained. Xenon lamps, tungsten lamps and the like are used as basic light sources, so that the utilization efficiency is low, the device cost is high, a large amount of heat is generated in the using process, and mercury pollution is caused. By means of the light splitting method through optical devices such as prisms, gratings and the like, monochromatic light with narrower spectrum width is obtained, output power is greatly reduced, and the effective utilization rate of a light source is low. For the applications with low requirements on the linewidth precision of monochromatic light but large power requirements, the existing products cannot well meet the use requirements.
Disclosure of Invention
In order to solve the problems, the invention provides a monochromatic light source based on high-power LED optical fiber coupling output.
The technical scheme adopted by the invention is as follows: a monochromatic light source based on high-power LED optical fiber coupling output comprises five modules, namely a light source, a coupling unit, a driving unit, a feedback unit and a human-computer interaction unit. The light source is used for generating monochromatic light, the coupling unit is used for collimating, coupling and outputting the monochromatic light, the driving unit is used for switching among the monochromatic light with different wavelengths, the feedback unit is used for improving the accuracy of the actual output wavelength of the monochromatic light, and the human-computer interaction unit is used for inputting wavelength information of the required monochromatic light and feeding back the wavelength information of the actual output monochromatic light by an operator.
Furthermore, the light source is composed of 15 1W high-power LEDs with spectrum range of 395-535nm, spectrum interval of 10nm and bandwidth of 5nm, the 15 LEDs are arranged in parallel, and are driven by a single chip microcomputer and a corresponding amplifying circuit to be lightened as required. The coupling unit is composed of a coupling system and an output medium, the coupling system is a biconvex lens group, and the output medium is a 2mm large-diameter plastic optical fiber. And in consideration of the synchronism of the requirements of the coupling system and the output medium on the optical wavelength, the coupling system and the output medium are fixed on the same load platform front and back. The driving unit adopts the singlechip to realize the control to step motor drives the lead screw and rotates, and then drives the translation of load platform, and the coupling unit on the load platform can carry out collimation, coupling and output with different LED light sources this moment. The feedback unit consists of a grating ruler and a feedback circuit thereof which are arranged in parallel with the lead screw, after the position of the coupling unit is switched every time, the grating ruler measures the actual accurate position of the coupling unit and feeds back the actual accurate position to the singlechip, and the singlechip adjusts the position of the coupling unit according to the return parameters. The man-machine interaction unit consists of a digital board, a display screen and a single chip microcomputer, wherein the digital board is used for an operator to input required monochromatic light wavelength, the single chip microcomputer controls the system to generate and output monochromatic light according to the input wavelength, and the display screen displays and inputs the required wavelength and the real output wavelength.
As a further improvement of the invention, the computer-controlled system in the single chip microcomputer adopts STM32 as a main controller, and the single chip microcomputer has an advanced Cortex-M3 kernel architecture, and has the following advantages compared with the traditional 8051,ARM7TDMI kernel:
(1) Single cycle multiply and hardware divide instructions, achieving excellent efficiency (1.25 DMIPS/MHz)
(2) Built-in fast interrupt controller provides superior real-time performance
(3) Compared with ARM7TDMI, the running speed can be up to 35 percent faster, and the code can be saved by 45 percent at most
(4) Has three low power consumption modes and flexible clock control mechanism, is convenient for the user to optimize and needs to flexibly select
(5) Low cost, rich peripheral functions, and short development time
As a further improvement of the invention, the light source adopts a high-power LED as a basic light source, and has the following advantages:
(1) The service life is long. The service life of the light emitting can be as long as 5-10 ten thousand hours.
(2) The luminous efficiency is high. When the LED is electrified to emit light, experiments determine that ten percent of electric energy is converted into light energy, and the conversion efficiency of a common incandescent lamp is only seven percent to eight percent.
(3) The luminous response speed is high. The response time of the LED lamp is within a few nanoseconds, the high-frequency characteristic is high, a pulse signal can be displayed, and compared with the LED lamp, the response time of an incandescent lamp is in milliseconds, and the high-frequency characteristic is poor. The light-emitting speed of the light source can be improved when the light-emitting diode is applied to the product.
(4) Is green and environment-friendly. The common energy-saving lamp works on the principle of heating resistance wires, so that substances harmful to the environment, such as mercury and other heavy metals, are easily generated. The LED is a solid luminous body, the waste can be recycled, the pollution is avoided, a large amount of harmful gases such as sulfur dioxide and nitride and greenhouse gases such as carbon dioxide are reduced, the living environment of people is improved, and the LED can be called as a green lighting source. "
Drawings
FIG. 1 is a schematic diagram of the main structure of the present invention.
Fig. 2 is a schematic mechanical structure of the system of the present invention.
FIG. 3 is a schematic diagram of an LED control structure according to the present invention.
FIG. 4 is a control schematic of the stepper motor module of the present invention.
The specific implementation scheme is as follows:
in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 4, the invention provides a monochromatic light source based on high-power LED fiber coupling output, which includes five modules, namely a light source, a coupling unit, a driving unit, a feedback unit, and a human-computer interaction unit. The light source is used for generating monochromatic light, the coupling unit is used for collimating, coupling and outputting the monochromatic light, the driving unit is used for switching between the monochromatic light with different wavelengths, the feedback unit is used for improving the accuracy of the actual output wavelength of the monochromatic light, and the human-computer interaction unit is used for inputting wavelength information of the required monochromatic light and feeding back the wavelength information of the actual output monochromatic light by an operator.
Referring to fig. 2, the light source is composed of 15 high-power LEDs with spectral interval of 10nm and bandwidth of 5nm in the range of 395-535nm, and 15 (4) LEDs are installed in parallel and controlled by (1) a single chip microcomputer and corresponding (2) drive circuits to be lighted as required. The coupling unit is composed of a coupling system (6) and an output medium (7), the coupling system is a biconvex lens group, and the output medium is a 2mm large-diameter plastic optical fiber. And (3) fixing the coupling system (6) and the output medium (7) on the same load platform (8) in front and back mode in consideration of the synchronism of the requirements of the coupling system and the output medium on optical wavelength. The drive unit adopts (1) singlechip to realize the control to (3) step motor to by (3) step motor drive lead screw rotation, and then drive (8) load platform's translation, the coupling unit on (8) load platform this moment can carry out collimation, coupling and output with different (4) LED light sources. The feedback unit consists of a grating ruler (5) and a feedback circuit (9), wherein the grating ruler is installed in parallel with the screw rod, after the coupling unit is switched in position each time, the grating ruler (5) measures the actual accurate position of the coupling unit and feeds the actual accurate position back to the single chip microcomputer (1), and the single chip microcomputer (1) adjusts the position of the coupling unit according to the return parameters. The man-machine interaction unit consists of a digital board, a display screen and (1) a single chip microcomputer, wherein the digital board is used for an operator to input required monochromatic light wavelength, the single chip microcomputer controls the system to generate and output monochromatic light according to the input wavelength, and the required wavelength and the real output wavelength are displayed and input on the display screen.
The specific implementation mode is simple in structure and reasonable in design, the stepping motor is controlled by the single chip microcomputer to select light sources with different wavelengths, and finally, a monochromatic light source is output. The power of the monochromatic light source is improved, light pollution is avoided, the system development time is prolonged, the use value is certain, free selection can be achieved, and the device is convenient to operate and portable to use.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it will be understood by those skilled in the art that the specification as a whole and the embodiments may be suitably combined to form other embodiments as will be apparent to those skilled in the art.
Claims (7)
1. A monochromatic light source based on high-power LED optical fiber coupling output is characterized in that: the system comprises five modules of a light source, a coupling unit, a driving unit, a feedback unit and a human-computer interaction unit, and mainly structurally comprises a single chip microcomputer, a digital board, a display screen, a stepping motor, an LED light source, a grating ruler, optical fibers, a screw rod and the like. The light source is used for generating monochromatic light, the coupling unit is used for collimating, coupling and outputting the monochromatic light, the driving unit is used for switching between monochromatic lights with different wavelengths, the feedback unit is used for improving the accuracy of the actual output wavelength of the monochromatic light, and the human-computer interaction unit is used for inputting wavelength information of the required monochromatic light and feeding back the wavelength information of the actual output monochromatic light by an operator.
2. The monochromatic light source based on the high-power LED optical fiber coupling output of claim 1 is characterized in that: the 15 high-power LED light sources with the spectral interval of 10nm and the bandwidth of 5nm replace tungsten lamps, xenon lamps, halogen lamps and the like as basic light sources, the spectral range is 395-535nm, the effective spectral range is wide, the power is high, the electro-optic conversion efficiency is high, and meanwhile, the regulation and control of the brightness of the light sources can be realized through current regulation and control.
3. The monochromatic light source based on the high-power LED optical fiber coupling output of claim 1 is characterized in that: the LED light sources with different wavelengths are directly coupled, and higher power output can be obtained compared with light splitting devices such as prisms and gratings.
4. The monochromatic light source based on the high-power LED optical fiber coupling output of claim 1 is characterized in that: based on a single chip microcomputer and a multi-path demultiplexing device, the on-demand lighting control of 15 parallel high-power LEDs is realized, and the interference of incoherent wavelength monochromatic light is avoided.
5. The monochromatic light source based on high-power LED optical fiber coupling output of claim 1, characterized in that: the coupling unit uses the biconvex lens group as a coupling system to realize the coupling from a light source to an output medium, so that the coupling is direct and convenient, and the light loss in the coupling process is reduced.
6. The monochromatic light source based on the high-power LED optical fiber coupling output of claim 1 is characterized in that: the transmission medium adopts 2mm large-diameter plastic optical fibers, so that the coupling efficiency is improved, the loss is reduced, the tolerance rate is improved, and the requirement on operation is lowered.
7. The monochromatic light source based on high-power LED optical fiber coupling output of claim 1, characterized in that: and the actual position of the load platform is measured in real time by using the grating ruler, and the load platform is secondarily adjusted by feeding back the actual position to the singlechip, so that the system accuracy and the effective utilization rate of light source output are improved.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110657705.0A CN115499970A (en) | 2021-06-18 | 2021-06-18 | Monochromatic light source based on high-power LED optical fiber coupling output |
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| CN202110657705.0A CN115499970A (en) | 2021-06-18 | 2021-06-18 | Monochromatic light source based on high-power LED optical fiber coupling output |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6188705B1 (en) * | 1997-05-16 | 2001-02-13 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Fiber grating coupled light source capable of tunable, single frequency operation |
| CN101420099A (en) * | 2008-11-28 | 2009-04-29 | 华南理工大学 | Germanate glass optical fiber laser with laser wavelength within 1.7-2.1 mu m |
| CN103217252A (en) * | 2013-03-25 | 2013-07-24 | 上海市计量测试技术研究院 | Movable container type high-precision micro-pressure detection device |
| CN203965952U (en) * | 2014-08-04 | 2014-11-26 | 刘泊 | Based on the precision stage of piezoelectric ceramics |
| CN107588363A (en) * | 2017-08-24 | 2018-01-16 | 中国电子科技集团公司第四十研究所 | The polarized monochromatic light source generation system and method for a kind of Programmable and Variable wavelength |
| CN207729291U (en) * | 2018-01-05 | 2018-08-14 | 杭州远方光电信息股份有限公司 | A kind of lighting device |
| CN108572427A (en) * | 2018-06-15 | 2018-09-25 | 哈尔滨工程大学 | Auto-focusing multi-wavelength collimated monochromatic ligth generating means |
| CN210691043U (en) * | 2019-12-05 | 2020-06-05 | 中山新诺科技股份有限公司 | Multi-spectral digital exposure system for integrally exposing resistance welding circuit |
-
2021
- 2021-06-18 CN CN202110657705.0A patent/CN115499970A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6188705B1 (en) * | 1997-05-16 | 2001-02-13 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Fiber grating coupled light source capable of tunable, single frequency operation |
| CN101420099A (en) * | 2008-11-28 | 2009-04-29 | 华南理工大学 | Germanate glass optical fiber laser with laser wavelength within 1.7-2.1 mu m |
| CN103217252A (en) * | 2013-03-25 | 2013-07-24 | 上海市计量测试技术研究院 | Movable container type high-precision micro-pressure detection device |
| CN203965952U (en) * | 2014-08-04 | 2014-11-26 | 刘泊 | Based on the precision stage of piezoelectric ceramics |
| CN107588363A (en) * | 2017-08-24 | 2018-01-16 | 中国电子科技集团公司第四十研究所 | The polarized monochromatic light source generation system and method for a kind of Programmable and Variable wavelength |
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| CN108572427A (en) * | 2018-06-15 | 2018-09-25 | 哈尔滨工程大学 | Auto-focusing multi-wavelength collimated monochromatic ligth generating means |
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