CN205811274U - RGB LASER Light Source luminous power output Self Matching system - Google Patents
RGB LASER Light Source luminous power output Self Matching system Download PDFInfo
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- CN205811274U CN205811274U CN201620724646.9U CN201620724646U CN205811274U CN 205811274 U CN205811274 U CN 205811274U CN 201620724646 U CN201620724646 U CN 201620724646U CN 205811274 U CN205811274 U CN 205811274U
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Abstract
This utility model provides a kind of RGB LASER Light Source luminous power output Self Matching system.The technical program includes having plated the optical glass flat board of anti-reflection film, arrowband R filter plate, arrowband G filter plate, arrowband B filter plate, plus lens, optical attenuation sheet, even light diffusion sheet, cone of light siphunculus, photodetector and corresponding feedback control circuit system.Ensure that the high accuracy Self Matching of RGB LASER Light Source Output optical power controls, and then improve the display quality of screen picture, this design simple in construction, stable performance, RGB LASER Light Source Output optical power is carried out high accuracy feedback control, can be applicable to the laser lighting higher to light field stability requirement or technical field of laser display.
Description
Technical field
This utility model relates to optics, is specially a kind of RGB LASER Light Source luminous power output Self Matching system, application
In laser display, technical field of laser illumination, light source output brightness, colour temperature and uniformity stability are required higher equipment
With instrument.
Background technology
Laser has that brightness is high, wavelength bandwidth is little, the features such as etendue amount is little, in the abundant degree of Show Color, if
Standby output brightness, the key technical index such as system effectiveness all has the advantage that conventional light source (bulb) is incomparable, along with can
Seeing day by day the enriching of semiconductor laser industrial chain of optical band, laser necessarily replaces the leading position of conventional light source occuping market.
But, the trichroism semiconductor laser of RGB that laser display and field of laser illumination use, in use can go out
Decay the most in various degree, on the other hand due to the impact of other factors such as dust, humidity, temperature, coating process, optical device pair
The laser loss degree of different wave length can be different, so can cause the proportioning imbalance of rgb light source, the colour temperature of equipment output light and brightness
Instability, thus affect image quality or lighting quality.
The most more accurate mode realizes the Self Matching self-correcting of RGB LASER Light Source luminous power output
Function, is a difficult problem present in laser display and illuminator.
Summary of the invention
It is automatic that the purpose of this utility model is to provide the RGB LASER Light Source luminous power of a kind of low-cost and high-precision to export
Regulation technology, it is achieved brightness and the stability of colour temperature.
This utility model adopts the following technical scheme that realization:
A kind of RGB LASER Light Source luminous power output Self Matching system, including light splitting optical path and feedback regulating circuit；
Light splitting optical path includes the optical glass flat board having plated anti-reflection film system, for three kinds of arrowbands of tri-kinds of optical maser wavelengths of RGB
Filter plate, plus lens, attenuator, diffusion sheet and light beam is carried out the cone of light siphunculus of shaping.Specific as follows:
Described light splitting optical path includes the first, second and third optical glass flat board being coated with anti-reflection film system；Described first optical glass
Arrowband R filter plate, the first plus lens, the first optical attenuation sheet, the first even light diffusion sheet and is set gradually in the light path of flat board
One cone of light siphunculus；
Arrowband G filter plate, the second plus lens, the second light decay is set gradually in the light path of described second optical glass flat board
Subtract sheet, the second even light diffusion sheet and the second cone of light siphunculus；
Arrowband B filter plate, the 3rd plus lens, the 3rd light decay is set gradually in the light path of described 3rd optical glass flat board
Subtract sheet, the 3rd even light diffusion sheet and triconic light siphunculus；
Described feedback regulating circuit includes the photodetector being respectively placed in first, second and third cone of light siphunculus exit end, three
The optical signal of detection is changed into analog electrical signal and respectively by AD sampling A/D chip input system control by individual photodetector in real time
Coremaking sheet, described system control chip adjusts signal by DA conversion chip output RGB laser brightness.
During work, the collimated light beam that main optical path separates, a part is anti-through having plated the first optical glass flat board of anti-reflection film system
Penetrating, reflection light becomes one-wavelength laser after laser narrow-band R filter plate filters, and one-wavelength laser, after the first plus lens converges, shines
Penetrating and decay laser on the first attenuator, the light after decay is irradiated on the first diffusion sheet homogenize laser, even
Light after change directly enters to inject the first cone of light siphunculus and carries out beam shaping, and then obtains the first monochromatic uniform square light
?；Another part is through having plated the second optical glass flat board transmission of anti-reflection film system, and the light part after transmission, through next stage, is plated
Second optical glass flat reflective of anti-reflection film system, reflection light through arrowband G filter plate filtering, second plus lens converge, second
Attenuator decay, the second diffusion sheet homogenize and the second tapered light pipe carries out shaping, and then obtain the monochromatic uniform side of the second
Shape light field；Another part has plated the second optical glass flat board transmission of anti-reflection film system, the light part warp after transmission through next stage
Next stage, has plated the 3rd optical glass flat reflective of anti-reflection film system, and reflection light is through the filtering of arrowband B filter plate, the 3rd convergence thoroughly
Mirror converges, the 3rd attenuator is decayed, the 3rd diffusion sheet homogenizes and triconic light pipe carries out shaping, thus it is single to obtain the third
The uniform square light field of color；Another part, through lower next stage, has plated the 3rd optical glass flat board transmission of anti-reflection film system, after transmission
Light energy be that light field is given up light, therefore useless light has been carried out rational heat dissipation design, on the one hand by red of the heat radiation of particular design
Heat is derived, on the other hand the heat derived is discharged in air by radiator fan, thus ensures the steady of systematic function
Qualitative.
Feedback regulating circuit, key components includes photodetector, A/D sampling A/D chip, system master chip.
First, three photodetectors are separately fixed at the exit end of three light siphunculus, photodetector separately detect
Go out the light intensity of the uniform light field of light siphunculus outgoing, and by feedback control circuit, optical signal is changed into the signal of telecommunication.Light electrical resistivity survey
Survey device in the case of having illumination, output voltage or current signal, light intensity increases, and output voltage or electric current be consequently increased, but
It is voltage or the current signal the most directly measuring photodetector output in this circuitry processes, but photodetector is made
Use for the device that can change with illumination internal resistance, it is to avoid when intensity of illumination is relatively low, and photodetector output signal is the most weak,
Being difficult to measure or need signal to amplify and increase cost, the internal resistance of photodetector simultaneously can be considered as its open-circuit voltage and short circuit
The ratio of electric current, has slackened detector and has been in the nature light sensitive diode and the nonlinear characteristic of intrinsic voltage x current.
The analog electrical signal converted obtains digital signal after A/D sampling A/D chip is sampled, through system master chip to obtaining
The digital signal obtained carries out digital filtering and algorithm adjusts, and then determines the signal adjusting RGB laser brightness, thus to RGB
Trichroism semiconductor laser is adjusted the luminous power of light source output.
The light intensity of illumination to be controlled so that photodetector is operated in its linear zone, in order to right
Laser instrument carries out Serial regulation, it also avoid simultaneously and demarcates photodetector one by one, and non-linearization processes.The most both
Measuring accuracy can be improved and can reduce again system cost.
Adjustment frequency 0.2S/ time additionally, AD sampling A/D chip frequency should control at about 20HZ, to laser instrument.Because swashing
Light device typically uses water-cooled or air-cooled, and water-cooled has higher temperature stability, and air-cooled variation of ambient temperature amplitude is the slowest,
Under this characteristic, after laser diode power regulation, reach the time required for secondary balancing at about 0.2S.Too fast light
Power adjustments can cause degree of regulation to decline on the contrary.
In order to further enhance the stability of degree of regulation and system, by current rgb light power with through sampling feedback meter
Difference between the target rgb light power obtained is divided into 5 ~ 10 parts, does steps regulation, and often one ladder of regulation will be again
Test and calculate, revise adjustment amount next time.
This utility model is reasonable in design, simple in construction, and reach has the beneficial effect that:
1, monochromaticity is high: light splitting optical path designs, and is effectively filtered light splitting light beam by filter plate, thus by RGB tri-
Color laser is effectively separated, and then effectively prevents interfering between not sharing the same light, and makes circuit regulation RGB LASER Light Source defeated
Light power is the most accurate.
2, uniformity is good: collimated light beam reflects through coated optics glass plate, after being filtered by filter plate, by plus lens
Converging, enter attenuator and decay light beam, the light after decay homogenizes through large angle scattering sheet, homogenizes light entrance cone of light and leads to
Pipe homogenizes shaping further, thus the light field being evenly distributed, and so advantageously reduces owing to light field inequality is brought
Detector measurement error, thus it is effectively increased the precision of feedback regulation.
3, degree of regulation is high: based on rational light path design, get rid of different colours light interfere and light field not
Uniformity, and then improve the accuracy of test result, then design through rational feedback circuit, thus defeated to RGB LASER Light Source
The luminous power gone out carries out high-precision control and regulation.
4, heat radiation sealed is effective: according to system structure demand, devises red of the heat radiation of special shape, dispels the heat red
Function is to collect unnecessary useless light, and converts it into heat, prevents reflecting light and enters detector, impacts measurement result,
Additionally dispel the heat red and light splitting optical path system is served good sealing function, and then ensure that the stability of system, finally should
Radiator structure good heat dissipation effect, monnolithic case is attractive in appearance.
5, the design simple in construction, cost is low, it is easy to processes and installs.
6, in device, each ingredient all can realize long time continuous working, and stable performance is safe and reliable.
This utility model on the one hand effectively processing by the useless light of the reasonable light splitting to light beam, shimming shaping and residue,
Improve the detection accuracy of detector, and then improve the precision of electronic feedback regulation；On the other hand by selecting high accuracy
Detector, stable performance and the high A/D sampling A/D chip of precision, and efficient feedback control circuit design, thus ensure that RGB
The high accuracy Self Matching of LASER Light Source Output optical power controls, and then improves the display quality of screen picture, this design structure
Simply, stable performance, RGB LASER Light Source Output optical power is carried out high accuracy feedback control, can be applicable to light field stability
Require higher laser lighting or technical field of laser display.
Accompanying drawing explanation
Fig. 1 represents light splitting optical path design diagram.
Fig. 2 represents feedback control circuit schematic diagram.
Fig. 3 represents system layout figure.
In figure, 1-the first optical glass flat board, 2-the second optical glass flat board, 3-the 3rd optical glass flat board, 4-arrowband R
Filter plate, 5-arrowband G filter plate, 6-arrowband B filter plate, 7-the first plus lens, 8-the second plus lens, 9-the 3rd converges thoroughly
Mirror, 10-the first optical attenuation sheet, 11-the second optical attenuation sheet, 12-the 3rd optical attenuation sheet, the even light diffusion sheet of 13-first, 14-second
Even light diffusion sheet, the even light diffusion sheet of 15-the 3rd, 16-the first cone of light siphunculus, 17-the second cone of light siphunculus, 18-triconic
Light siphunculus, 19-photodetector, 20-dispels the heat red, 21-feedback control circuit plate, 22-AD sampling A/D chip, and 23-system controls
Chip, 24-DA conversion chip, 25-RGB laser brightness adjusts signal, 26-analog electrical signal.
Detailed description of the invention
Below in conjunction with the accompanying drawings specific embodiment of the utility model is described in detail.
A kind of RGB LASER Light Source luminous power output Self Matching system, including light splitting optical path design, feedback control circuit design
And red of the heat radiation design carried out according to light splitting optical path structure.
As it is shown in figure 1, include the first, second and third optical glass flat board 1,2,3 being coated with anti-reflection film system；Described first optics
Set gradually R filter plate the 4, first plus lens the 7, first optical attenuation sheet the 10, first even light in arrowband in the light path of glass plate 1 to dissipate
Penetrate sheet 13 and the first cone of light siphunculus 16.
Arrowband G filter plate the 5, second plus lens 8, second is set gradually in the light path of described second optical glass flat board 2
Optical attenuation sheet the 11, second even light diffusion sheet 14 and the second cone of light siphunculus 17；
Arrowband B filter plate the 6, the 3rd plus lens the 9, the 3rd is set gradually in the light path of described 3rd optical glass flat board 3
Optical attenuation sheet the 12, the 3rd even light diffusion sheet 15 and triconic light siphunculus 18.
First, second and third attenuator is used for regulating illumination intensity, according to circumstances may select the attenuator of differential declines value, or
Cancel this attenuator.
In light splitting optical path, the useless light through the 3rd optical glass flat board 3 exposes to dispel the heat red 20, described heat radiation red 20
Heat be emitted in air by radiator fan.
Described feedback regulating circuit includes the photoelectricity being respectively placed in first, second and third cone of light siphunculus 16,17,18 exit end
Detector 19, the optical signal of detection is changed into analog electrical signal 26 and is sampled by AD respectively by three photodetectors 19 in real time
Chip 22 input system control chip 23, described system control chip 23 exports RGB laser brightness by DA conversion chip 24 and adjusts
Entire signal 25.
The outfan of described photodetector 19 passes through the additional reverse-biased 5V voltage of resistance.
Described system control chip 23 uses STM32 chip.
During work, as it is shown on figure 3, RGB parallel beam incident is on the first optical glass flat board 1 having plated anti-reflection film system,
A part of light reflects through the first optical glass flat board 1 of plated film, and reflection light filters through arrowband R filter plate 4, filtered monochromatic R
Light enters the first plus lens 7, is incident on the first optical attenuation sheet 10 after the first plus lens converges, and the R light after decay enters
Entering the first even light diffusion sheet 13 to carry out beam divergence and homogenize, the light beam after homogenizing enters the first cone of light siphunculus 16 to laser beam
Homogenizing shaping further, thus obtain uniform side's speckle light beam, the square speckle light beam of outgoing is radiated at photodetector
On 19, carry out photodetection, optical signal is changed into analog electrical signal 26, by the feedback control circuit plate 21 simulation to converting
The signal of telecommunication is acquired, and the analog electrical signal of collection is changed into digital signal, the stm32 digital signal number to obtaining
Word filtering and algorithm adjust, and then determine the signal 309 adjusting RGB laser brightness, thus regulate the luminous power of light source output,
Light source is controlled in real time；Another part is through the first optical glass flat board 1 transmission of plated film, and the RGB collimated light beam of transmission enters
Being mapped to the second optical glass flat board 2 of plated film, a part reflects, through the second of plated film through the second optical glass flat board 2 of plated film
The light of optical glass flat board 2 reflection is the same with aforesaid way, sequentially passes through arrowband G filter plate the 5, second plus lens 8, second declines
Subtract sheet 11, second even light diffusion sheet the 14, second cone of light siphunculus 17, after being shaped to uniform side speckle, be incident on photodetector
On 19, by feedback control circuit plate 21, RGB LASER Light Source is carried out real-time sampling feedback control；Another part is through the of plated film
Two optical glass flat board 2 transmissions, the RGB collimated light beam of transmission ibid incides the 3rd optical glass flat board 3 of plated film, incidence
A RGB collimated light beam part reflects through the 3rd optical glass flat board 3 of plated film, the optical circuit path of reflection light the most after filtering,
Shimming, shaping, another part is through the 3rd optical glass flat board 3 transmission of plated film, and transmission light is the useless light of residue, and the useless light of residue enters
Enter red of the heat radiation of design, absorbed by red of heat radiation and the luminous energy of absorption is changed into heat energy, the heat energy converted is derived simultaneously,
Then it is discharged in air by radiator fan.
Wherein, RGB directional light is separated into monochromatic sharp by arrowband R filter plate 4, arrowband G filter plate 5 and arrowband B filter plate 6
Light, as it is shown in figure 1, so can be prevented effectively from interfering between different colours light.Optical attenuation sheet plays light intensity in light path
The attenuation of degree, makees reflecting mirror although with the optical glass flat board having plated anti-reflection film, and its light intensity is also beyond photodetection
The investigative range of device, therefore use optical attenuation sheet, the light intensity in light path is rationally decayed, makes photodetector be operated in the quickest
Sensillary area, improves the control accuracy of feedback circuit further.Even light diffusion sheet and cone of light siphunculus play and homogenize light field with whole
Shape effect, laser is the Gauss spectrum of standard before homogenizing, and is then uniform side speckle light field, improves light the most further after homogenizing
The accuracy that electric explorer is measured.The appropriate design of red of dispelling the heat effectively prevent the useless light of residue and enters light splitting optical path system, from
And improve the feedback control precision of system further, secondly luminous energy is changed into heat energy, and to its effective derivation, high efficiency and heat radiation,
Also light splitting optical path system is served good sealing function simultaneously, make inside and outside isolation, the most dust-proof, and then ensured system
Cleanliness factor, improves the service life of product.
Feedback control circuit such as Fig. 2, samples core including additional reverse-biased 5V voltage, resistance, photodetector, sampled point, AD
Sheet, system control chip Stm32.Described feedback regulating circuit is integrated on feedback control circuit plate 21.
During work, the RGB collimated light beam that main optical path system is drawn, through light splitting, homogenize, respectively enter photodetection after shaping
Device, the optical signal of detection is changed into analog electrical signal 26 by photodetector in real time, by A/D sampling A/D chip 22, will simulation electricity
Signal changes into digital signal, through Stm32 control chip, the digital signal gathered is carried out digital filtering and algorithm and adjusts,
Final output RGB laser brightness adjusts signal 25, and signal is fed back to main optical path, monitors RGB LASER Light Source in real time
Control.
The present invention utilizes the optical glass flat board having plated anti-reflection film that RGB laser beam is divided into four parts, wherein three parts
For RGB LASER Light Source Output optical power automatic feedback control light path, another part is the useless light of residue, and useless light is red through the heat radiation of design
Sheet converts, derives and finally discharge in atmosphere；RGB LASER Light Source Output optical power automatic feedback control light path, utilizes RGB narrow
Separation by laser is become three kinds of monochromatic light by band filter plate respectively, the most respectively the monochromatic light separated is homogenized shaping, after shaping
Laser beam be radiated at respectively on 3 photodetectors, the luminous power of tri-kinds of LASER Light Sources of RGB output is carried out in real time simultaneously
Monitoring, and feedback control, to guarantee the stability of output light field.Parallel RGB LASER Light Source is reasonably separated into by the design
Three kinds of monochromatic light, successfully avoid interfering between not sharing the same light；The rationally selection of attenuator enables photodetector
It is operated in quasi linear region auto；Dispel the heat the appropriate design of red, on the one hand avoid residue useless light and photodetector measurement result is made
Become impact, on the other hand optical system is carried out good heat radiation and sealing function；To feedback control circuit main unit device
Part such as photodetector and A/D converter have carried out filler test, choose high-precision components and parts, thus ensure feedback control
In high precision；This design simple in construction, stable performance, can be applicable to light stability performance require higher laser lighting or
Display Technique field.
It should be noted last that, above example is only in order to illustrate the technical solution of the utility model and unrestricted, to the greatest extent
Pipe has been described in detail with reference to embodiment this utility model, it will be understood by those within the art that, new to this practicality
The technical scheme of type is modified or equivalent, without departure from the spirit and scope of the technical solution of the utility model, its
All should contain in claims of the present utility model.
Claims (4)
1. a RGB LASER Light Source luminous power output Self Matching system, it is characterised in that: include light splitting optical path and feedback regulation electricity
Road；
Described light splitting optical path includes the first, second and third optical glass flat board (1,2,3) being coated with anti-reflection film system；Described first optics
Arrowband R filter plate (4), the first plus lens (7), the first even light diffusion sheet (13) is set gradually in the light path of glass plate (1)
And the first cone of light siphunculus (16)；
Set gradually in the light path of described second optical glass flat board (2) arrowband G filter plate (5), the second plus lens (8),
Two even light diffusion sheets (14) and the second cone of light siphunculus (17)；
Set gradually in the light path of described 3rd optical glass flat board (3) arrowband B filter plate (6), the 3rd plus lens (9),
Three even light diffusion sheet (15) and triconic light siphunculus (18)；
Described feedback regulating circuit includes the light electrical resistivity survey being respectively placed in first, second and third cone of light siphunculus (16,17,18) exit end
Surveying device (19), the optical signal of detection is changed into analog electrical signal (26) and passes through AD respectively by three photodetectors (19) in real time
Sampling A/D chip (22) input system control chip (23), described system control chip (23) is exported by DA conversion chip (24)
RGB laser brightness adjusts signal (25).
RGB LASER Light Source luminous power the most according to claim 1 output Self Matching system, it is characterised in that: described photoelectricity
The outfan of detector (19) passes through the additional reverse-biased 5V voltage of resistance.
RGB LASER Light Source luminous power the most according to claim 1 and 2 output Self Matching system, it is characterised in that: described the
Before one even light diffusion sheet (13), the first optical attenuation sheet (10) is set；Before described second even light diffusion sheet (14), the second light is set
Attenuator (11)；Before described 3rd even light diffusion sheet (15), the 3rd optical attenuation sheet (12) is set.
RGB LASER Light Source luminous power the most according to claim 3 output Self Matching system, it is characterised in that: described feedback
Regulation circuit is integrated on feedback control circuit plate (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620724646.9U CN205811274U (en) | 2016-07-11 | 2016-07-11 | RGB LASER Light Source luminous power output Self Matching system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620724646.9U CN205811274U (en) | 2016-07-11 | 2016-07-11 | RGB LASER Light Source luminous power output Self Matching system |
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| CN205811274U true CN205811274U (en) | 2016-12-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105932546A (en) * | 2016-07-11 | 2016-09-07 | 山西傲维光视光电科技有限公司 | Optical power output self-matching system of RGB (Red, Green, Blue) laser light source |
-
2016
- 2016-07-11 CN CN201620724646.9U patent/CN205811274U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105932546A (en) * | 2016-07-11 | 2016-09-07 | 山西傲维光视光电科技有限公司 | Optical power output self-matching system of RGB (Red, Green, Blue) laser light source |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171226 Address after: No. 51, workshop No. 3, Zhengyang street, Taiyuan economic and Technological Development Zone, Shanxi Province Patentee after: JINMEI LASERTEC CORP., LTD. Address before: 401, room 226, 030006 Changzhi Road, Taiyuan hi tech Zone, Shanxi, China Patentee before: Shanxi Aowei Guangshi Photoelectric Technology Co., Ltd. |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 030032 No. 51 Zhengyang Street, Xiaodian District, Taiyuan City, Shanxi Province Patentee after: Shanxi Hanwei laser Polytron Technologies Inc Address before: 030032 No. 51 Zhengyang Street, Taiyuan Economic and Technological Development Zone, Shanxi Province Patentee before: JINMEI LASERTEC CORP., LTD. |