CN103925995A - Multicolor light source experimental device applied to photoelectric colorimeter - Google Patents
Multicolor light source experimental device applied to photoelectric colorimeter Download PDFInfo
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- CN103925995A CN103925995A CN201410155178.3A CN201410155178A CN103925995A CN 103925995 A CN103925995 A CN 103925995A CN 201410155178 A CN201410155178 A CN 201410155178A CN 103925995 A CN103925995 A CN 103925995A
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Abstract
The invention provides a multicolor light source experimental device applied to a photoelectric colorimeter. The multicolor light source experimental device is characterized in that a red LED light source, a green LED light source and a blue LED light source are arranged in a shading box, light emitted by the light sources can be coupled into light guiding fibers, and outlets of the light guiding fibers are provided with a beam expanding lens and a collimating lens. Eight colored light output control buttons are arranged on a power source controller, according to the three-primary color mixing principle, when one certain control button is pressed down, the power source controller controls the red LED light source, the green LED light source and the blue LED light source to emit colored light in the corresponding proportion, the colored light are mixed in the light guiding fibers, and the colored light in the corresponding colors is output to serve as an incidence light source of the photoelectric colorimeter. By means of the multicolor light source experimental device, the red LED light source, the green LED light source and the blue LED light source serve as three-primary-color light sources, various kinds of colored light can be obtained, the complementation colored light can be provided for solutions in various colors to serve as incidence light, and the measuring accuracy is improved. In addition, LEDs serve as the light sources, the heating amount is less, the stability is high, the service life is long, and luminance adjustment in the PWM mode is accurate and convenient to achieve.
Description
Technical field
The present invention relates to a kind of Photoelectric Detection and physics facility, specifically relate to a kind of polychromatic source experimental provision that is applied to photolometer.
Background technology
The solution of many materials is coloured, although the solution of some material itself does not have color, and can be by adding developer to generate colored solutions.These solution have a common feature, and, in the time that its concentration changes, the depth of solution colour also changes thereupon, and solution is denseer, and color relation is darker, and color intensity and content of material are proportional.Therefore, can measure by the depth of comparison solution color the content of coloring matter in solution.Material in solution, under the irradiation of light excites, produces the absorption effect to light.The intensity that therefore can be absorbed by colored solutions according to light, measure content of material in solution number.This shade is based on the comparison measured the analytical approach of content of material in solution and is called colorimetric analysis, claims again absorption photometry.
Colorimetric analysis is the one in chemical analysis method, has the features such as simple, quick, sensitivity is high, is widely used in the mensuration of microcomponent, conventionally measures content 10
-1-10
-4the microcomponent of mg/L.Particularly adopt in recent years new special efficacy organicvisualization reagent and complexing screening agent, can directly carry out without separation colorimetric estimation.Colorimetric analysis is the same with other instrumental analysis, also has the shortcoming of large (being generally 1%-5%) of relative error, but measures for microcomponent, and because absolute error is very little, measurement result is also gratifying.In modern instrumental analysis, there is 60% left and right to adopt or partly adopted this analytical approach.Colorimetric analysis is widely used in the aspects such as the species analysis in water analysis in Pharmaceutical Analysis, sanitary analysis, biochemical analysis, environmental pollution and smelting, geological exploration.
The use of photolometer and the mensuration of solution concentration are common experimental projects in Physical Experiment.Because colored solutions has selectivity to the absorption of light, while therefore carrying out colorimetric estimation, incident light must be selected, otherwise sensitivity is very low, causes measurement result inaccurate.If a certain coloured light can form white light after mixing in the proper ratio with another kind of coloured light, these two kinds of coloured light are just called " complementary colors ".Select the rule of incident light to be: the color of incident light and the color of solution to be measured should be " complementary colors ", because between complementary coloured light, can form the effect mutually stopping, thereby can make incident light farthest be absorbed, improve measuring accuracy." complementary colors " commonly used is: redness and cyan, and green and magenta (aubergine), blue and yellow, orange and cyanic colours.In experiment, photolometer experimental provision mainly has the following disadvantages at present:
One, adopts incandescent lamp as light source more, obtains the coloured light of three kinds of different colours blue (wavelength is 420nm), green (wavelength is 500nm), red (wavelength is 650nm) by color filter.Therefore can only for three kinds of colors yellow, purple, cyan solution good complementary coloured light is provided, and can only provide for the solution of other colors the incident light that approaches complementary colors, thereby affect accuracy of measurement.
Its two, adopt incandescent lamp as light source, thermal value is high, degree of stability is poor, affects measuring accuracy.
Its three, in experimentation, to constantly change color filter, accidentally color filter will be broken.
Summary of the invention
In order to overcome the above-mentioned deficiency of prior art, the present invention proposes a kind of polychromatic source experimental provision that is applied to photolometer, this device adopts three LED light sources of RGB, according to the three primary colors mixing principle of light, thereby mutually mix and can obtain various coloured light in varing proportions by these three kinds of coloured light, can provide complementary coloured light as incident light for versicolor solution, thereby improve accuracy of measurement.In addition, adopt LED as light source, thermal value is low, and degree of stability is high, and the life-span is long, drives simply, adopts PWM mode brightness adjusting accurately convenient.
The technical solution adopted for the present invention to solve the technical problems is: three LED light sources are set in a shading casing, are respectively red LED light source, green LED light source and blue led light source.The light that LED light source sends all can be coupled in optical fibers, and optical fibers exit arranges extender lens and collimation lens, after heat-intercepting glass is set.LED light source is connected with power-supply controller of electric by interface, LED light source is driven by constant current source, can regulate size of current by constant current source current adjusting knob, and can on electric current display screen, show, the brightness of light source adopts PWM (pulse-length modulation) mode to regulate, because this mode efficiency is higher, Current Control is also more accurate.We know that the three primary colors of light are RGB (RGBs), and other various coloured light all can be mixed in varing proportions mutually by these three kinds of coloured light, such as any two kinds of coloured light equivalent in primaries are added, become the complementary coloured light of another kind of coloured light in primaries, that is: the ruddiness+green glow=gold-tinted of equivalent, is complementary to blue light; Ruddiness+blue light=the magenta light of equivalent (also claiming fuchsin, more shallow purplish red), is complementary to green glow; Green glow+blue light=the green light of equivalent, is complementary to ruddiness.Eight coloured light outputs are set on power-supply controller of electric and control button, according to the three primary colors mixing principle of light, press a certain control button, sent the coloured light of corresponding proportion by controller control red LED light source, green LED light source and blue led light source, in optical fibers, mix, thereby can make the coloured light of optical fibers output respective color, as the incident light source of photolometer.Control button such as pressing cyan light output, controller control green LED light source and blue led light source send the coloured light of same intensity, mix, thereby make optical fibers output cyan light in optical fibers.When experiment according to the color of solution to be measured, according to " complementary colors " selection principle of incident light, control button by the coloured light output on power-supply controller of electric, make the coloured light of optical fibers output respective color, regulate constant current source to export suitable electric current, regulate PWM brightness adjustment control adjusting knob to make incident light brightness suitable, export through optical fibers, through extender lens and collimation lens, become directional light, the incident light source that can be used as photolometer carries out experiment measuring.
The invention has the beneficial effects as follows, this device, using three LED light sources of RGB as three primary light source, can obtain various coloured light, thereby can provide complementary coloured light as incident light to versicolor solution, improves accuracy of measurement.In addition, adopt LED as light source, thermal value is low, and degree of stability is high, and the life-span is long, adopts PWM mode brightness adjusting accurately convenient.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described.
Accompanying drawing is structural representation of the present invention.
1. shading casings in accompanying drawing, 2. red LED light source, 3. green LED light source, 4. blue led light source, 5. optical fibers, 6. extender lens, 7. collimation lens, 8. heat-intercepting glass, 9. cuvette, 10. photodiode, button is controlled in 11. red light outputs, button is controlled in 12. orange-colored light outputs, button is controlled in 13. sodium yellow outputs, button is controlled in 14. green light outputs, button is controlled in 15. cyan light outputs, button is controlled in 16. ultramarine coloured light outputs, button is controlled in 17. blue light outputs, button is controlled in 18. purple light outputs, 19. green LED light sources and power-supply controller of electric interface, 20. red LED light sources and power-supply controller of electric interface, 21. power-supply controller of electric, 22. blue led light sources and power-supply controller of electric interface, 23. constant current source electric current display screens, 24. constant current source current adjusting knobs, 25.LED light source PWM brightness adjustment control adjusting knob.
Embodiment
In accompanying drawing, three LED light sources are set shading casing 1 is interior, are respectively red LED light source 2, green LED light source 3 and blue led light source 4.The light that LED light source sends all can be coupled in optical fibers 5, and optical fibers 5 exits arrange extender lens 6 and collimation lens 7, after heat-intercepting glass 8 is set.LED light source passes through interface, it is respectively green LED light source and power-supply controller of electric interface 19, red LED light source and power-supply controller of electric interface 20, blue led light source and power-supply controller of electric interface 22, be connected with power-supply controller of electric 21, LED light source is driven by constant current source, can regulate size of current by constant current source current adjusting knob 24, and can on constant current source electric current display screen 23, show, the brightness of light source adopts PWM (pulse-length modulation) mode, regulate by LED light source PWM brightness adjustment control adjusting knob 25, because this mode efficiency is higher, Current Control is also more accurate.Eight coloured light outputs are set on power-supply controller of electric and control button, be respectively red light output and control button 11, button 12 is controlled in orange-colored light output, button 13 is controlled in sodium yellow output, button 14 is controlled in green light output, and button 15 is controlled in cyan light output, and button 16 is controlled in the output of ultramarine coloured light, button 17 is controlled in blue light output, and button 18 is controlled in purple light output.According to the three primary colors mixing principle of light, press a certain control button, sent the coloured light of corresponding proportion by controller control red LED light source 2, green LED light source 3 and blue led light source 4, in optical fibers, mix, thereby can make optical fibers 5 export the coloured light of respective color, as the incident light source of photolometer.Control button 15 such as pressing cyan light output, power-supply controller of electric 21 controls green LED light source 3 and blue led light source 4 sends the coloured light of same intensity, thereby makes optical fibers 5 export cyan light.
Specific experiment operation steps is:
(1) according to the color of solution to be measured, according to " complementary colors " selection principle of incident light, control button 11-18 by the coloured light output on power-supply controller of electric 21, make optical fibers 5 export the coloured light of respective color.The color of for example copper-bath to be measured is blue, its complementary colors is yellow, press sodium yellow output and control button 13, power-supply controller of electric 21 controls red LED light source 2 and green LED light source 3 sends the coloured light of same intensity, thereby makes optical fibers 5 export sodium yellow.
(2) make constant current source export suitable electric current by constant current source current adjusting knob 24, the coloured light brightness that optical fibers 5 is exported by LED light source PWM brightness adjustment control adjusting knob 25 is suitable.
(3) coloured light that regulates extender lens 6 and collimation lens 7 that optical fibers 5 is exported becomes directional light, as the incident light source of photolometer, through heat-intercepting glass 8 and cuvette 9, is irradiated on photodiode 10, can carry out experiment measuring.
Above structure of the present invention is set forth, but the not conditional intention of the embodiment that the present invention introduces, and not deviating from the scope of purport of the present invention, the present invention can have multiple variation and amendment.
Claims (2)
1. one kind is applied to the polychromatic source experimental provision of photolometer, three LED light sources are specifically set in a shading casing, be respectively red LED light source, green LED light source and blue led light source, it is characterized in that: the light that LED light source sends all can be coupled in optical fibers, and optical fibers exit arranges extender lens and collimation lens.
2. the polychromatic source experimental provision that is applied to photolometer according to claim 1, it is characterized in that: eight coloured light outputs are set on power-supply controller of electric and control button, according to the three primary colors mixing principle of light, press a certain control button, sent the coloured light of corresponding proportion by controller control red LED light source, green LED light source and blue led light source, in optical fibers, mix, thereby can make optical fibers export the coloured light of respective color, as the incident light source of photolometer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410155178.3A CN103925995A (en) | 2014-04-18 | 2014-04-18 | Multicolor light source experimental device applied to photoelectric colorimeter |
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| CN201410155178.3A CN103925995A (en) | 2014-04-18 | 2014-04-18 | Multicolor light source experimental device applied to photoelectric colorimeter |
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| CN103925995A true CN103925995A (en) | 2014-07-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568799A (en) * | 2015-01-28 | 2015-04-29 | 合肥工业大学 | Monochromatic light composited light scanning type luminosity absorption detection system |
| CN111696447A (en) * | 2020-03-20 | 2020-09-22 | 利亚德光电股份有限公司 | Dot matrix LED display screen, method and system for displaying image and storage medium |
-
2014
- 2014-04-18 CN CN201410155178.3A patent/CN103925995A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568799A (en) * | 2015-01-28 | 2015-04-29 | 合肥工业大学 | Monochromatic light composited light scanning type luminosity absorption detection system |
| CN111696447A (en) * | 2020-03-20 | 2020-09-22 | 利亚德光电股份有限公司 | Dot matrix LED display screen, method and system for displaying image and storage medium |
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