CN105241640B - A kind of measuring device and its method of blue light weighting radiance - Google Patents
A kind of measuring device and its method of blue light weighting radiance Download PDFInfo
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- CN105241640B CN105241640B CN201510825104.0A CN201510825104A CN105241640B CN 105241640 B CN105241640 B CN 105241640B CN 201510825104 A CN201510825104 A CN 201510825104A CN 105241640 B CN105241640 B CN 105241640B
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Abstract
The invention discloses measuring devices and its method that a kind of blue light weights radiance, device includes test system and sighting system, test system includes object lens successively, speculum with holes, lens, first dispersion element, attenuator, second dispersion element and photocell, voltmeter is connected on photocell, object lens, lens, first dispersion element, attenuator, second dispersion element, the hole of photronic optical centre and speculum with holes is with light source in same optical axis, attenuator is tightly attached to the second dispersion element, sighting system includes object lens successively, speculum, be delayed lens group, cursor and eyepiece, the reflection light of reflective mirror with holes is incident on reflective mirror, the reflection light of reflective mirror is incident to by delay lens group and cursor on eyepiece, object lens and human eye, photocell is conjugated.The configuration of the present invention is simple, small, light-weight, easy to use, fast response time, cheap, technical difficulty is small, is suitble to use under a variety of occasions such as indoor and outdoors.
Description
Technical field
The present invention relates to field of photodetection, the especially a kind of measuring device and its method of blue light weighting radiance.
Background technology
LED has become common illumination and display light source.With the development of technology, LED light output is increasing.It brings
Efficient illumination and highlighted display screen, meanwhile, it also brings " blue light harm ".
Currently, national and foreign standards, such as CIE S 009/E:2002、IEC/TR62471-2-2009、IEC/TR 62778-
2012, the GB/T 20145-2006 in China etc. define " blue light weighting radiance " to describe the size of blue light harm.Root
According to these standards, blue light weights radiance LBIt is to be obtained by light source light spectrum radiance L (λ) weighting blue light harm coefficient Bs (λ)
It arrives：
The core of blue light weighting radiance measurement is the spectral radiance L of light source under the conditions of measurement standard is defined
(λ).The OST-300 reflective optical securities of corresponding test device such as Hangzhou distant place Photoelectric Co., Ltd. test system.But
In actually measuring, test device is mainly made of the spectrometer of luminance meter and 300nm to 700nm ranges, for LED light
Source, to obtain accurately as a result, spectrometer step-length requires to be 0.2nm, spectral error is not more than 3%, and lamps and lanterns needs, which are placed on, leads
On rail, darkroom is needed, therefore, this method condition is excessively harsh, can only be used in laboratory, cannot carry out blue light to general lighting
The assessment of harm.
Invention content
For problems of the prior art, the present invention provides one kind being suitable for daily life, and device structure is simple,
It is cheap, can quickly, accurately and easily assess general lighting lamps and lanterns blue light weighting radiance measuring device and its
Method.
The purpose of the present invention is achieved through the following technical solutions.
A kind of measuring device of blue light weighting radiance, including test system and sighting system, the test system
It is described successively including object lens, speculum with holes, lens, the first dispersion element, attenuator, the second dispersion element and photocell
Voltmeter, the object lens, lens, the first dispersion element, attenuator, the second dispersion element, photocell are connected on photocell
Optical centre and speculum with holes hole and light source in same optical axis, the emergent rays of the object lens passes through with holes reflective
The hole of mirror is incident on lens, and the emergent ray of the lens is incident on the first dispersion element, and the attenuator is
Between one dispersion element and the second dispersion element, the sighting system includes object lens, speculum, delay lens group, light successively
Mark and eyepiece, the reflection light of the reflective mirror with holes are incident on reflective mirror, and the reflection light of the reflective mirror passes through
Delay lens group and cursor are incident on eyepiece, and the object lens are conjugated with human eye, photocell.
The attenuator is distributed attenuator.
A kind of measurement method of blue light weighting radiance, calibration steps include：
1) it selects a blue light weighting radiance to be placed at light source for L1 standard lamps, adjusts speculum with holes along reflection
Mirror plane moves in parallel so that light reflection to human eye, human eye aim at standard lamp by sighting system；
2) it keeps instrument motionless, adjusts speculum with holes along the parallel playback of mirror plane so that standard lamp was sent out
Light enters test system from hole, enters the first dispersion element, distributed attenuator, the second dispersion element through lens are parallel successively
To photocell is arrived, it is U1 that registration is read from voltmeter；
Measuring process includes：
3) light source to be measured is placed at light source, adjusts speculum with holes and moved in parallel along mirror plane so that people
Eye aims at light source to be measured by sighting system；
4) it keeps instrument motionless, adjusts speculum with holes along the parallel playback of mirror plane, read and show from voltmeter
Number is U2；
5) the blue light weighting radiance for calculating light source to be measured is U2L1/U1.
Compared with the prior art, the advantage of the invention is that：It is simple in structure, small, light-weight, easy to use, response
Speed is fast, cheap, and technical difficulty is small, is suitble to use under a variety of occasions such as indoor and outdoors.
Description of the drawings
Fig. 1 is the structural schematic diagram for the measuring device that a kind of blue light of the present invention weights radiance.
Fig. 2 is prism chromatic dispersion principle figure.
In figure：1, light source 2, object lens 3, speculum with holes 4, lens 5, the first dispersion element 6, distributed attenuator
7, the second dispersion element 8, photocell 9, voltmeter 10, speculum 11, delay lens group 12, cursor 13, eyepiece.
Specific implementation mode
With reference to the accompanying drawings of the specification and specific embodiment, the present invention is described in detail.
As shown in Figure 1, a kind of measuring device of blue light weighting radiance, a kind of measurement dress of blue light weighting radiance
It sets, including test system and sighting system, the test system includes object lens 2, speculum with holes 3, lens 4, first successively
Dispersion element 5, distributed attenuator 6, the second dispersion element 7 and photocell 8 are connected with voltmeter 9 on the photocell 8,
The optical centre of the object lens 2, lens 4, the first dispersion element 5, distributed attenuator 6, the second dispersion element 7, photocell 8
With the hole of speculum 3 with holes with light source 1 in same optical axis, hole that the emergent rays of the object lens 2 passes through reflective mirror with holes
It is incident on lens 4, the emergent ray of the lens 4 is incident on the first dispersion element 5, the distributed attenuator 6
It is tightly attached to the second dispersion element 7, the sighting system includes speculum 10, delay lens group 11, cursor 12 and eyepiece successively
13, the reflection light of the reflective mirror with holes is incident on reflective mirror, and the reflection light of the reflective mirror is saturating by being delayed
Microscope group 11 and cursor 12 are incident on eyepiece 13, and the object lens 2 are conjugated with human eye, photocell 8.
" the first dispersion element 5, distributed attenuator 6, the second dispersion element 7, " be this patent core apparatus.First color
The effect for dissipating element 5 is to separate incident light in space by spatial distribution, the effect of the second dispersion element 7 on the contrary, be will be by
Spatial distribution it is separated it is photosynthetic together.They can be prism and Fresnel Lenses, can also be other dispersion elements, decline
The light decay rate for subtracting piece 6 is different and different with spatial position, is the function of spatial position.
A kind of measurement method of blue light weighting radiance, calibration steps include：
1) it is to adjust speculum with holes 3 along anti-at L1 standard lamps placement light source 1 to select blue light weighting radiance
It penetrates 10 plane of mirror to move in parallel so that human eye aims at standard lamp by sighting system；
2) it keeps instrument motionless, adjusts speculum 3 with holes along the parallel playback of 10 plane of speculum so that standard lamp is sent out
Light enter test system from hole, enter the first dispersion element 5, distributed attenuator 6, the second color through lens 4 are parallel successively
Element 7 is dissipated to photocell 8, and it is U1 that registration is read from voltmeter 9；
Measuring process：
3) light source to be measured is placed at light source 1, adjusts speculum 3 with holes and moved in parallel along 10 plane of speculum, is made
It obtains human eye and light source to be measured is aimed at by sighting system；
4) it keeps instrument motionless, adjusts speculum 3 with holes along the parallel playback of 10 plane of speculum, read from voltmeter 9
It is U2 to take registration；
5) the blue light weighting radiance for calculating light source to be measured is U2 × L1/U1.
As shown in Fig. 2, the first dispersion element 5 (by taking prism as an example) transmits incident light L (λ) according to wavelength difference respectively
Onto distributed attenuator 6, such as figure below, position x different in this way is corresponded from different wavelength Xs, if according to appropriate
Attenuation function A (x) decay, by the emergent light of the second dispersion element be equivalent to just to incident light L (λ) according to wavelength A (λ) into
Row decaying, is denoted as L (λ) A (λ).
The light of L (λ) the first dispersion elements 5 of incidence, λ is optical wavelength, and X indicates position or the coordinate of distributed attenuation piece, in figure,
The 1 corresponding positions λ are topmost, and the 4 corresponding positions λ are in bottom.A (x) is the attenuation function of distributed attenuation piece, i.e. L (x)
After the attenuator, become L (x) A (x)
The light injection photocell 8 exported after second prism 7, is converted into electricity output, if the spectral response of photocell 8
For S (λ), then electricity output and light radiationIt is directly proportional, it is evident that the alternative condition of A (x) is B (λ)
=A (λ) S (λ).
Finally, which is shown by voltmeter 9.
Prism is a kind of selectable dispersion element, in order to improve chromatic dispersion effects, can also use other yuan such as binary face
Part.
The novelty of this patent is：Relatively difficult blue light harm weighting function B (λ) is matched, becomes fairly simple
Distributed attenuator 6 design, greatly reduce design difficulty.
Distributed attenuator 6 can be changed the modes such as glazed area and realized, can also be led to by the thickness of change light transmission piece
Plated film is crossed directly distributed attenuator 6 is plated on 7.The distributed attenuation rate that these processing technologies obtain can reach very high essence
Degree, can meet the needs of this patent.
Claims (2)
1. a kind of measuring device of blue light weighting radiance, including test system and sighting system, it is characterised in that described
Test system includes object lens, speculum with holes, lens, the first dispersion element, attenuator, the second dispersion element and photoelectricity successively
Pond is connected with voltmeter, the object lens, lens, the first dispersion element, attenuator, the second dispersion member on the photocell
In same optical axis, the emergent ray of the object lens is logical for part, the hole of photronic optical centre and speculum with holes and light source
The hole for crossing speculum with holes is incident on lens, and the emergent ray of the lens is incident on the first dispersion element, described
For attenuator between the first dispersion element and the second dispersion element, the sighting system includes object lens, speculum, delay successively
The reflection light of lens group, cursor and eyepiece, the speculum with holes is incident on speculum, the reflection of the speculum
Light is incident to by delay lens group and cursor on eyepiece, and the object lens are conjugated with human eye, photocell, the attenuator
For distributed attenuator, the distribution attenuator refers to that the light decay rate A (x) of attenuator is different and different with spatial position,
A (x) is the function of spatial position.
2. a kind of measurement method of blue light weighting radiance, it is characterised in that calibration steps includes：
1）It selects a blue light weighting radiance to be placed at light source for L1 standard lamps, it is flat along speculum to adjust speculum with holes
Face moves in parallel so that light reflection to human eye, human eye aim at standard lamp by sighting system；
2）Keep instrument it is motionless, adjust speculum with holes along the parallel playback of mirror plane so that the light that standard lamp is sent out from
Enter test system in hole, enter the first dispersion element, distributed attenuator through lens are parallel successively, the second dispersion element is to arriving
Photocell, from voltmeter read registration be U1, it is described distribution attenuator refer to refer to attenuator light decay rate A (x) with
Spatial position is different and different, and A (x) is the function of spatial position；
Measuring process includes：
3）Light source to be measured is placed at light source, speculum with holes is adjusted and is moved in parallel along mirror plane so that human eye is logical
It crosses sighting system and aims at light source to be measured；
4）It keeps instrument motionless, adjusts speculum with holes along the parallel playback of mirror plane, reading registration is from voltmeter
U2；
5）The blue light weighting radiance for calculating light source to be measured is U2 × L1/U1.
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| CN105954154A (en) * | 2016-04-28 | 2016-09-21 | 清华大学深圳研究生院 | Method and device for measuring two-dimensional light scattering angular distribution of suspended particles |
| CN106768326B (en) * | 2016-11-24 | 2018-04-24 | 郑州航空工业管理学院 | A kind of device and its detection method for being used to detect LED white light spectral qualities |
| CN109459212A (en) * | 2018-11-07 | 2019-03-12 | 常州工学院 | A kind of LED life appraisal procedure based on blue light harm |
| CN109633489B (en) * | 2018-12-21 | 2021-06-04 | 常州工学院 | Method and device for LED blue light hazard brightness test and blue light leakage prediction |
| CN109632100B (en) * | 2018-12-29 | 2021-01-01 | 苏州市产品质量监督检验院 | Method for measuring blue light weighted radiance space distribution |
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| CN102253594A (en) * | 2011-06-21 | 2011-11-23 | 北京凌云光视数字图像技术有限公司 | Platform for testing performance of camera based on EMVA1288 standard |
| CN103076655A (en) * | 2013-01-17 | 2013-05-01 | 珠海保税区光联通讯技术有限公司 | Adjustable optical attenuator wavelength division multiplexer |
| CN103230254A (en) * | 2013-04-19 | 2013-08-07 | 饶丰 | Human eye chromatic aberration measuring device based on Hartmann sensor |
| CN203259248U (en) * | 2013-03-07 | 2013-10-30 | 中国计量学院 | Portable colorimeter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4258049B2 (en) * | 1998-12-24 | 2009-04-30 | ソニー株式会社 | Optical pickup device and optical disk device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253594A (en) * | 2011-06-21 | 2011-11-23 | 北京凌云光视数字图像技术有限公司 | Platform for testing performance of camera based on EMVA1288 standard |
| CN103076655A (en) * | 2013-01-17 | 2013-05-01 | 珠海保税区光联通讯技术有限公司 | Adjustable optical attenuator wavelength division multiplexer |
| CN203259248U (en) * | 2013-03-07 | 2013-10-30 | 中国计量学院 | Portable colorimeter |
| CN103230254A (en) * | 2013-04-19 | 2013-08-07 | 饶丰 | Human eye chromatic aberration measuring device based on Hartmann sensor |
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Effective date of registration: 20200330 Address after: 213000 No. 8, Huashan Road, Xinbei District, Jiangsu, Changzhou Patentee after: Changzhou Huichuang intelligent photoelectric Co., Ltd Address before: 213022 No. 1, Wushan Road, Xinbei District, Jiangsu, Changzhou Patentee before: CHANGZHOU INSTITUTE OF TECHNOLOGY |