CN102288389A - Light source aging test measuring device - Google Patents
Light source aging test measuring device Download PDFInfo
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- CN102288389A CN102288389A CN2011101220113A CN201110122011A CN102288389A CN 102288389 A CN102288389 A CN 102288389A CN 2011101220113 A CN2011101220113 A CN 2011101220113A CN 201110122011 A CN201110122011 A CN 201110122011A CN 102288389 A CN102288389 A CN 102288389A
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- light source
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Abstract
The invention discloses a light source aging test measuring device which is provided with a reference light source capable of emitting light stably. Before and after the ageing of a tested light source, a measuring instrument compares the optical parameters of the measurement reference light source with those of a tested light source, thereby eliminating or correcting uncertain factors introduced due to the own change of the measuring instrument, therefore, the correctness of the light source ageing test is greatly improved.
Description
[technical field]
The invention belongs to the optical radiation measurement field, be specifically related to a kind of light source ages experimental measurement device.
[background technology]
New type light sources such as LED substitute conventional light source gradually with advantages such as its life-span length, environmental protections becomes the market mainstream, yet above-mentioned advantage but becomes the obstacle of the test of carrying out for accurate its performance of evaluation.For example, characteristics such as the long-life of new type light source, high stability have determined burning-point in its short time in normal working conditions, and its photoelectric properties change hardly.Therefore, must could correctly estimate its performance by the method for accelerated test.
Publication number is that the patent of invention of CN101799357A and CN201017022Y all discloses light source accelerated test method and device thereof, all measured light is placed in the temperature control testing laboratory, change the environmental baseline of measured light by temperature control testing laboratory, carry out accelerated aging test, and by measuring its photoelectric parameter data over time, calculate the every characterisitic parameter relevant of measured light with life-span and reliability, this be at present comparatively the typical case, also be comparatively advanced person's light source accelerated deterioration and life test method.In the above-mentioned open file, all have same open question: if the state of measurement instrument own changes, then can't distinguish this variation is from measured light or from measurement instrument self, brings great uncertainty to test.
[summary of the invention]
In order to overcome the above-mentioned defective that exists in the prior art, the present invention is by introducing the reference light source, aim to provide simplicity of design, easy to operate, the light source ages test unit that energy is eliminated or correcting measuring instrument self changes, with the significantly accuracy of raising test, thereby the optical parametric of accurately judging light source changes.
For achieving the above object, the present invention has adopted following technical proposal:
A kind of light source ages experimental measurement device of the present invention, comprise testing laboratory, in testing laboratory, be provided with measured light and sampler, it is characterized in that, be provided with the reference light source in the testing laboratory, perhaps described reference light source is arranged on outside the testing laboratory, by lightguide the light that the reference light source is sent is imported in the testing laboratory; Described measured light and reference light source are electrically connected with program-controlled power supply; Sampler receives the light that measured light and reference light source are sent, and with optical signal transmission in coupled photometric meter.
Described program-controlled power supply control measured light was lighted and is implemented wearing out of measured light with this in certain temperature environment in the ageing step, and the reference light source was only lighted before or after a certain ageing step of measured light, and its purpose of lighting is exactly to implement comparing and measuring reference light source and measured light for photometric meter.Because when measured light is aging, the reference light source is idle, reference light source itself is again comparatively stable light source, under rated condition, light the reference light source and can obtain its comparatively stable optical parametric all the time, therefore, before or after a certain ageing step of measured light, measure the optical parametric of measured light and reference light source simultaneously, can effectively eliminate or proofread and correct photometric meter self and change the error of being brought.For convenience of explanation, the photometric meter process of measuring the optical parametric of measured light and reference light source before or after a certain ageing step of measured light is called and compares and measures the stage.
Above-mentioned measuring method further specifies as follows:
Before a certain ageing step, the optical parametric reading that photometric meter records reference light source and measured light is respectively Y at measured light
1And Y
T1After this ageing step, the optical parametric reading that photometric meter records reference light source and measured light is respectively Y
2And Y
T2, suppose that the instrument coefficient of photometric meter before and after the aging ratio of true value (the optical parametric reading with) is respectively k
1And k
2, reference light source optics true value is Y
r, measured light is Y in aging front and back optics true value
Tr1With Y T
R2, then have:
Y
1＝k
1*Y
r (1)
Y
2＝k
2*Y
r (2)
Y
T1＝k
1*Y
Tr1 (3)
Y
T2＝k
2*Y
Tr2 (4)
Get from following formula:
Y
Tr1＝(Y
T1/Y
1)*Y
r (5)
Y
Tr2＝(Y
T2/Y
2)*Y
r (6)
Formula (6) and formula (5) are divided by, and the relative variation of optical parametric that just is easy to obtain measured light is than L:
L＝(Y
Tr2/Y
Tr1)＝(Y
T2/Y
T1)*(Y
1/Y
2)*100％ (7)
Above-mentioned L is a relative quantity, but by this test unit, no matter still is after the ageing step, as long as measure the absolute light mathematic(al) parameter of primary measured light source, to be easy to obtain the variation of measured light at the absolute value of entire test before the ageing step.
Because reference light source optics true value is Y
rRemaining unchanged around the ageing step, so Y
1/ Y
2Can compare the state difference of measurement instrument before and after the ageing step, this ratio is also referred to as coefficient of comparisons, uses coefficient of comparisons can eliminate or correcting measuring instrument self variation.
Above-mentioned reference light source can be arranged on the one or more positions in the testing laboratory.If the reference light source is arranged on a certain fixed position in the testing laboratory, then directly gets the optical parametric of ageing step front and back reference light source under this position and calculate coefficient of comparisons; When the reference light source was placed on a plurality of position in the testing laboratory, the optical parametric mean value or the summation that are taken at diverse location were calculated coefficient of comparisons.The reference light source is placed on a plurality of positions can be by a reference light source at diverse location, and photometric meter records optical parametric one by one and realizes; Or having a plurality of reference light sources to be placed on diverse location respectively, photometric meter is measured a plurality of light sources simultaneously, and the mean value of read off or summation.The technical scheme that the reference light source is arranged on a plurality of positions can reduce greatly because the luminous error of bringing of directive property of reference light source effectively improves accuracy of measurement.
As a kind of technical scheme, the light source that above-mentioned reference light source and measured light are same type, the measuring error so that the differences of avoiding owing to both such as spectrum, light distribution and physical dimension are brought reduces uncertainty of measurement.
As a kind of technical scheme, above-mentioned reference light source is the led light source with light stable output.
As a kind of technical scheme, above-mentioned lightguide is a light-conductive optic fibre.
Light-emitting area or upwards is in the burning-point attitude of regulation to guarantee most of led light source downwards during the test of above-mentioned reference light source and measured light, avoids the uncertain factor of being introduced by the burning-point attitude.
The sampling guide rail is installed in testing laboratory, and above-mentioned sampler is arranged on the sampling guide rail and can moves along the sampling guide rail, and sampler is by moving the optical information that obtains different measured lights or reference light source on guide rail.
Above-mentioned program-controlled power supply can be power supply only, has both controlled each measured light, also controls the reference light source.Above-mentioned program-controlled power supply also can be the independent current source more than two or two, controls measured light and reference light source respectively.
As a kind of technical scheme, above-mentioned photometric meter is electrically connected with power supply and host computer respectively, photometric meter is input to the measurement result of measured light and reference light source in the host computer respectively, the optical parametric of host computer storage and analysis measured light and reference light source, draw the coefficient of comparisons of measurement instrument, thereby be used for proofreading and correct the measurement result of measured light, obtain the precise optical parameter of measured light, eliminate or proofread and correct owing to measurement instrument self changes the measuring error of introducing.
The invention has the beneficial effects as follows by introducing luminous stable reference light source, eliminate or correcting measuring instrument self changes and the uncertain factor introduced, significantly improved the accuracy of light source ages test.
[description of drawings]
Accompanying drawing 2 is structural representations of embodiment 2;
Accompanying drawing 3 is vertical views of sampling guide rail in embodiment 1 and 2;
1-testing laboratory; The 2-measured light; The 3-power supply; The 4-sampler; The 5-photometric meter; 6-reference light source; 7-environment temperature probe; 8-heating and cooling device; 9-testing laboratory control module; The 10-anchor clamps; The 11-temperature measurement probe; The 12-host computer; 13-multi way temperature meter; The 14-guide rail of taking a sample; The 15-lightguide.
[embodiment]
Be illustrated in figure 1 as a kind of structural representation of light source ages experimental measurement device.
Present embodiment comprises a testing laboratory 1, and luminous stable reference light source 6, a plurality of measured light 2 are set in the testing laboratory 1.Reference light source 6 described in the present embodiment all is a led light source with measured light 2, and wherein, reference light source 2 is for having the constant temperature led light source of light stable output.Sampler 4 is sampling by optical fiber device movably.As shown in Figure 3, the sampling guide rail 14 of crux is installed in testing laboratory 1, described sampler 4 is arranged on the sampling guide rail 16 and can moves in level and vertical direction respectively along described sampling guide rail 14, can between each measured light 2 and reference light source 6, move around, gather the light signal of measured light 2 and reference light source 6, and will adopt light signal deliver to photometric meter 5, the photometric meter 5 in the present embodiment is photometers.On the anchor clamps 10 of tested LED, temperature measurement probe 11 is set, is used to monitor the temperature of tested LED.Environment temperature probe 7 is set in the testing laboratory 1, be used for monitoring and control reference light source 6 and tested LED 2 residing environment temperatures, environment temperature probe 7 is connected with multi way temperature meter 13, multi way temperature meter 13 is electrically connected with host computer 12, programmable power supply 3, measurement instrument 5, testing laboratory's control module 9 all are connected with host computer 12, realize that control automatically and result show.Also be provided with heating and cooling device 8 in testing laboratory 1 outside, described environment temperature probe 7 and heating and cooling device 8 are electrically connected with test control module 9.
When actual tests, before the ageing step, programmable power supply 3 is lighted reference light source 6 and measured light 2 respectively, and the light quantity that photometric meter 5 is measured reference light source 6 and measured light 2 respectively is respectively G
1And G
T1, i(i represents i measured light).In the ageing step, only reference light source 2 is lighted, and reference light source 6 keeps extinguishing state.After this ageing step finished, programmable power supply 3 was lighted reference light source 6 and measured light 2 once more respectively, obtains photometric parameter G
2And G
T2, iPhotometric meter is input to the photometric measurement result of measured light 2 and reference light source 6 in the host computer 12, the optical parametric of host computer 12 storages and comparative analysis measured light 2 and reference light source 6, and it is that lumen depreciation is that the light quantity that draws changes:
L
i＝(G
T2，i/G
T1，i)*(G
1/G
2)*100％ (8)
Be illustrated in figure 2 as a kind of structural representation of light source ages experimental measurement device.
The basic structure of present embodiment is similar to embodiment 1, and different is that in the present embodiment, reference light source 6 is arranged on outside the testing laboratory 1, by lightguide 15 light that reference light source 6 is sent is imported in the testing laboratory 1.In the present embodiment, described lightguide 15 is a light-conductive optic fibre, and sampler 4 is similarly movably sampling by optical fiber device, but described photometric meter 5 is a spectral radiometer.And, be provided with the program-controlled power supply 3 of two independences that is electrically connected with reference light source 6 and measured light 2 respectively in the present embodiment, be used for controlling 6, two program-controlled power supplies 3 of measured light 2 and reference light source respectively and all be electrically connected with host computer 12.
When actual tests, before the ageing step, programmable power supply 3-1,3-2 light reference light source 6 and measured light 2 respectively, and the spectral power distribution that photometric meter 5 is measured reference light source 6 and measured light 2 respectively is respectively P
1(λ) and P
T1(λ)
i(i represents i measured light).In the ageing step, only reference light source 2 is lighted, and reference light source 6 keeps extinguishing state.After this ageing step finished, programmable power supply 3 was lighted reference light source 6 and measured light 2 once more respectively, obtains spectral power distribution and is respectively P
2(λ) and P
T2(λ)
iPhotometric meter is input to the results of spectral measurements of measured light 2 and reference light source 6 in the host computer 12, and relatively the spectral power reading of reference light source 6 before and after the ageing step obtains coefficient of comparisons: P
1(λ)/P
2(λ), proofread and correct the spectral power of measured light 2 after the ageing step, obtain with this coefficient of comparisons:
P
T2C(λ)
1＝P
T2(λ)
i*P
1(λ)/P
2(λ) (9)
Use the spectral power calculating lumen depreciation after proofreading and correct to be:
Other optical parametric changes, and can use to compare before spectral power calculated value and ageing step after the ageing step of overcorrect as chromaticity coordinates drift etc. to obtain.
Claims (7)
1. light source ages experimental measurement device, comprise testing laboratory (1), in testing laboratory (1), be provided with measured light (2) and sampler (4), it is characterized in that, be provided with reference light source (6) in the testing laboratory (1), perhaps described reference light source (6) is arranged on outside the testing laboratory (1), and the light that reference light source (6) is sent by lightguide (14) imports in the testing laboratory (1); Described measured light (2) and reference light source (6) are electrically connected with program-controlled power supply (3); Described sampler (4) receives the light that measured light (2) and reference light source (6) send, and optical signal transmission is arrived in the coupled photometric meter (5).
2. a kind of light source ages experimental measurement device as claimed in claim 1, it is characterized in that, described program-controlled power supply (3) control measured light (2) was lighted in the ageing step, described reference light source (6) is in the ageing step that measured light (2) is lighted and extinguishes state, and reference light source (6) was lighted in the stage that compares and measures before and after measured light (2) ageing step.
3. a kind of light source ages experimental measurement device as claimed in claim 1 or 2 is characterized in that, described reference light source (6) is arranged on the one or more positions in the testing laboratory (1).
4. a kind of light source ages experimental measurement device as claimed in claim 1 is characterized in that, sampling guide rail (14) is installed in testing laboratory (1), and described sampler (4) is arranged on sampling guide rail (14) and goes up also and can move along sampling guide rail (14).
5. a kind of light source ages experimental measurement device as claimed in claim 1 or 2 is characterized in that, described reference light source (6) is the light source of same type with measured light (2).
6. a kind of light source ages experimental measurement device as claimed in claim 1 is characterized in that described lightguide (15) is a light-conductive optic fibre.
7. a kind of light source ages experimental measurement device as claimed in claim 1 or 2 is characterized in that described reference light source (6) is a led light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110122011.3A CN102288389B (en) | 2011-05-11 | 2011-05-11 | A kind of light source aging test measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110122011.3A CN102288389B (en) | 2011-05-11 | 2011-05-11 | A kind of light source aging test measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN102288389A true CN102288389A (en) | 2011-12-21 |
| CN102288389B CN102288389B (en) | 2016-01-06 |
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| CN201110122011.3A Active CN102288389B (en) | 2011-05-11 | 2011-05-11 | A kind of light source aging test measuring device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142481A (en) * | 2014-08-15 | 2014-11-12 | 苏州天泽新能源科技有限公司 | Device and method for testing accelerated aging and service life speculating of LED lamps |
| CN105675264A (en) * | 2016-01-18 | 2016-06-15 | 宁波卓时检测技术有限公司 | Test method for luminous flux of LED light strings |
| CN104142481B (en) * | 2014-08-15 | 2017-01-04 | 苏州天泽新能源科技有限公司 | LED lamp accelerated ageing, life-span speculate method of testing |
| CN110933399A (en) * | 2019-11-12 | 2020-03-27 | 信利光电股份有限公司 | Detection method and device of light source equipment |
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| JPS5726719A (en) * | 1980-07-24 | 1982-02-12 | Nec Corp | Measuring circuit for light output of light emitting element |
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| CN101799357A (en) * | 2009-11-19 | 2010-08-11 | 杭州远方光电信息有限公司 | Light source test method and device thereof |
| CN202188951U (en) * | 2011-05-11 | 2012-04-11 | 杭州远方光电信息股份有限公司 | Measuring device for light source ageing test |
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2011
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5726719A (en) * | 1980-07-24 | 1982-02-12 | Nec Corp | Measuring circuit for light output of light emitting element |
| US5325171A (en) * | 1991-09-20 | 1994-06-28 | Nec Corporation | System for calibration of optical instrument on satellite with reference light source |
| CN1651900A (en) * | 2004-02-02 | 2005-08-10 | 阿特拉斯材料测试技术有限责任公司 | Accelerated weathering test apparatus with full spectrum calibration, monitoring and control |
| CN201017022Y (en) * | 2007-03-13 | 2008-02-06 | 杭州浙大三色仪器有限公司 | Semiconductor lighting device service life accelerate tester |
| CN101799357A (en) * | 2009-11-19 | 2010-08-11 | 杭州远方光电信息有限公司 | Light source test method and device thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142481A (en) * | 2014-08-15 | 2014-11-12 | 苏州天泽新能源科技有限公司 | Device and method for testing accelerated aging and service life speculating of LED lamps |
| CN104142481B (en) * | 2014-08-15 | 2017-01-04 | 苏州天泽新能源科技有限公司 | LED lamp accelerated ageing, life-span speculate method of testing |
| CN105675264A (en) * | 2016-01-18 | 2016-06-15 | 宁波卓时检测技术有限公司 | Test method for luminous flux of LED light strings |
| CN110933399A (en) * | 2019-11-12 | 2020-03-27 | 信利光电股份有限公司 | Detection method and device of light source equipment |
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| Publication number | Publication date |
|---|---|
| CN102288389B (en) | 2016-01-06 |
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