CN105424321B - A kind of detection method of UV curing light sources emittance attenuation rate - Google Patents
A kind of detection method of UV curing light sources emittance attenuation rate Download PDFInfo
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The present invention relates to a kind of detection method of UV curing light sources emittance attenuation rate, belong to printing technology.It is determined that the wave band of solidification wave band radiation energy attenuation degree can have been represented in UV curing light sources spectral radiant energy to be detected as detection light；Detection lug V is prepared by middle grey light transmissive material0And Vm, light damping plate group and two light damping plate T are prepared by middle grey light transmissive material0And Tm, light source screening part, detection lug and light damping plate are overlaped, are placed in a tubular device, constitute can visual observation light transmission state detector；Initially and after the use section time, detection lug V is used in detector respectively in the use of UV light sources0、VmWith light damping plate T0、Tm, add suitable light damping plate Ti, UV light sources are observed, by whether two parts light field reaches whether the firm distinguishable attenuation rate to determine radiation of light source energy of luminance difference reaches m times of design.Device needed for this method is simple, suitable for being used in production environment.
Description
Technical field
The present invention relates to a kind of detection side of UV (Ultraviolet-UV, ultraviolet) curing light source emittance attenuation rate
Method, it is adaptable in print production environment, to solidifying the assessment with UV radiation of light source energy attenuation degree, may indicate that production management people
The availability of the apparent UV light sources of member, belongs to printing technology.
Background technology
UV solidifications refer to material after ultraviolet light, and the ultraviolet light for absorbing certain wave band crosslinks polymerisation, wink
Between be changed into the process of solid-state from liquid, it is widely used in the industries such as printing, printing circuit board.
Printing-ink solidification is divided into traditional mercury lamp class light source and LED class UV light sources with UV light sources, is referred to as traditional UV
Light source and LED UV light sources.Conventional traditional UV light sources include medium pressure mercury lamp (international standard) and metal halid lamp, LED UV light
Source includes the narrow wavestrip LED that centre wavelength is respectively 365nm, 375nm, 385nm, 395nm and 405nm.
No matter any class UV light source is used, all need certain emittance, energy not enough can not then be such that ink thoroughly solidifies.
UV light sources understand aging in use, and emittance can gradually decay.In production, the service life of UV light sources is to radiate
Energy attenuation rate is standard.Such as, it is often that the energy of radiation peak wavelength is down to tube design radiation peak wavelength energy in press
Amount 80% when, just think to reach its life span and do not use.
Meanwhile, it is equipped with the tester that the UV emittance means of testing used is mostly test-strips or specialty.Use survey
For example a German color shifting ink test-strips of the method for strip.In use, the test-strips need to be pasted to the production product of motion
On, it is compared by the discoloration after UV illumination and standard specimen, by the light intensity attenuation degree with identical color on standard specimen and representative
To judge the radiation level of UV light.But found in application, the detection sample color in test-strips is with the color on standard specimen in form and aspect
It is all different, which standard specimen color met it is difficult to determine.In addition, the use of this method is also cumbersome.Use professional test instrument
Situation, then need to put together the instrument with certain volume and printing and together move by UV illumination to test.Sent out in practicality
Existing, the thickness that instrument has makes it be difficult to be fixed on instrument with printing；Meanwhile, the UV light direct beams of high-energy are also easily damaged instrument
Device.
In view of the problem of above-mentioned UV Radiation intensities test is present, wait in expectation new detection technique.Exploitation is convenient, fast, low
The detection technique of the UV radiation of light source doughs softening of cost, as the actual demand in print production.
The content of the invention
It is an object of the invention to provide a kind of detection method of UV curing light sources emittance attenuation rate, the side of enabling
Just it is used in print production.
A kind of detection method for UV curing light sources emittance attenuation rate that the present invention is provided, comprises the following steps：
(1) for the UV curing light sources used, it is determined that representational ripple in UV curing light sources spectral radiant energy to be detected
Duan Zuowei detection lights；The wave band of solidification wave band radiation energy attenuation degree can have been represented by filtering out.The ripple such as filtered out
Section is λ1To λ2Wave-length coverage, radiation energy trans fer is Sc(λ)。
(2) detection lug is prepared by middle grey light transmissive material, detection lug includes two adjacent but different regions of light transmittance；
Transmission containing the square or border circular areas that two adjacent areas are identical, light transmittance is different is prepared by middle grey light transmissive material
Piece, referred to as detection lug.The spectral transmittance in detection lug two parts region is designated as τ respectively1(λ)=τ1And τ2(λ)=τ2。
(3) two detection lug V are prepared0And Vm, V0The light transmittance in two regions is respectively τ1And τ2, and τ2=(1+n1)τ1；Vm
The light transmittance in two regions is respectively τ '1With τ '2, and τ '2=(1+n2)τ'1；n1、n2Respectively detection lug V0、VmTwo regions
Light source visual brightness just distinguishable difference and ratios delta Y/Y, the Δ Y '/Y ' of brightness, Y and Y ' are respectively n1、n2It is worth corresponding brightness,
n1、n2Being chosen for light source visual brightness, just distinguishable difference and brightness ratio Δ Y/Y are very fast with brightness Y change curves middle part, Curvature varying
In the range of different Δ Y/Y values.
Prepare two τ described by step (2)1、τ2Different detection lugs, is designated as V respectively0And Vm。V0And VmIt is designed as
It is respectively used to characterize light source to decay to m times of initial value using initial and emittance (m is for representing declining for radiation of light source energy
The rear radiation of light source energy of lapse rate-use and the ratio using primary light source emittance, there is 0<m<1) radiation of light source energy when.
V0The light transmittance of two parts transmission region is respectively τ1And τ2, VmThe light transmittance of two parts transmission region is respectively τ '1With τ '2.Will
Seek τ2=(1+n1)τ1With τ '2=(1+n2)τ'1, n1、n2Numerical value is in the just distinguishable poor and brightness ratio Δ Y/ of the light source visual brightness
Y has n with the Δ Y/Y values in the middle part of brightness Y change curves, in the very fast scope of Curvature varying2>n1, n1、n2It is worth corresponding brightness difference
For Y and Y '.
(4) light damping plate group, including the light damping plate that multiple light transmittances are gradually changed are prepared by middle grey light transmissive material, each subtracted
The shape and area of mating plate are identical with detection lug, and the light transmittance of same light damping plate is consistent.The requirement of light damping plate group has enough
Piece number, sufficiently small minimum light transmittance, larger light transmittance excursion, and less transmissivity difference.Such as, in λ1To λ2
Light transmittance in wave band is maximum 0.4 or so, minimum in 0.05 or so, when light damping plate light transmittance order is arranged, adjacent light damping plate
Between transmissivity difference 0.007 or so.
Light damping plate group is pressed into the descending sequence of light transmittance, T is respectively labeled as1、T2、…、Ti、…、TN, i=1,2 ...,
N, is designated as Ti, light transmittance is also designated as Ti。
(5) two light damping plate T are prepared0And Tm, light transmittance TmWith T0Meet：M, τ in formula1、τ′1、
The same step of Y, Y ' implication (3).T0And TmIn, T0Light transmittance is higher (being preferably more than 0.3), and size is in T1~T10Between；This two subtract
Mating plate is respectively used to characterize radiation of light source energy when light source decays to m times of initial value using initial and emittance.
(6) light source screening part (such as optical filter), detection lug and light damping plate (1 or multi-disc) are overlaped, are placed on
In one such as device of lens barrel shape, constitute can visual observation light transmission state device, referred to as detector.Wherein, light damping plate
It is conveniently replaced with detection lug.
(7) detection lug V is placed in a detector using initial in UV light sources0With light damping plate T0, have UV light source lights at one
At the position scattered to, against the observation of UV light sources, suitable light damping plate T is addedi, make two parts light field observed in detector
Luminance difference it is just distinguishable.
(8) UV light sources were used after a period of time, and detection lug V is placed in a detectormWith light damping plate Tm, the phase in step (7)
At same position, against the observation of UV light sources, light damping plate TiConstant, it is bright whether two parts light field observed in detector reaches
Whether the firm distinguishable attenuation rate to determine radiation of light source energy of degree difference reaches m times of design.
In step (1), band logical filter can be used in the selection that can have represented solidification wave band radiation energy attenuation degree wave band
Mating plate.Now, spectral radiant energy S is used in detectionc(λ) is S (λ) L (λ).S (λ) and L (λ) is respectively UV light sources and bandpass filter
The spectral radiant energy and spectral transmittance of piece.L (λ) band-pass wavelength range lambda1~λ2The representational light of solidification need to be directed to
Wave band.Optical filter is shaped as square or circular, and the length of side or diameter are between 40mm~50mm.
In press, for metal halogen UV curing light sources, detection light can be used as using 380nm~400nm wave band；
For LED UV curing light sources, detection light can be used as using the wave-length coverage of light source in itself.
In step (2), detection lug is that middle grey transmits piece, that is, has characteristic of the light transmittance not with wavelength change, light transmittance τ
(λ)=τ.In practicality, it is desirable in the λ to be detected1~λ2Wave band meets τ (λ)=τ.The shapes and sizes of the detection lug with
Bandpass filter is identical, that is, is shaped as square or circular, the length of side or diameter are between 40mm~50mm.
In step (3), the detection lug V0, as detected light ScWhen (λ) irradiates, the light intensity Y of two parts light field in detection lug
It can be expressed as with Y+ Δs Y：
In formula, V (λ) is the spectral luminous efficiency function of human eye vision, kmFor constant, unit is lumens/watt (lm/W), bright
It is 683lm/W under visual condition.Y and Y+ Δs Y is detection lug V0The light intensity of two region transmitted lights, unit is cd/m2。τ1And τ2
Respectively detection lug V0The light transmittance of two transmission regions.
By (1), (2) formula and τ2=(1+n1)τ1, have：
Similarly, the detection lug Vm, as detected light ScWhen (λ) irradiates, in detection lug the light intensity Y ' of two parts light field and
Y '+Δ Y ' can be expressed as:
By (4), (5) formula and τ '2=(1+n2)τ'1, have：
(3) formula, (6) formula show, when the light transmittance in the region of detection lug two meets condition τ2=(1+n) τ1(n is a certain numerical value)
When, Δ Y/Y values are only relevant with n values, and the factor size such as light transmittance of emittance and detection lug with UV detection lights is unrelated.
Just distinguishable difference and brightness ratio Δ Y/Y, with brightness Y change curve, are human eyes in colourity theory to the brightness
The luminance difference threshold value rule of vision, as shown in Figure 1.Characterize be brightness just distinguishable difference with the ratios delta Y/Y of brightness with brightness Y
Variation relation, be divided into monocular and biocular case.Be respectively provided with gradually reduces in low-light level area Δ Y/Y as Y value increases, and drops
It is low to a certain extent after the characteristics of no longer change.When (Y, Δ Y/Y) point falls above threshold curve, luminance difference is clear and legible；
And work as (Y, Δ Y/Y) point fall below threshold curve when, luminance difference is not then completely distinguishable.
By taking binocular law curve as an example, the faster scope of Curvature varying in the middle part of the described curve is about scheduled on A points on curve and arrived
The scope of B points, as shown in Fig. 1 partial enlarged drawing Fig. 2.It is required that angle between the tangent line and Y-axis negative direction of A, B point 30 °~
Between 70 °.The Y and Δ Y/Y coordinate values of A, B point are designated as (Y respectively1、y1) and (Y2、y2)。
The n1、n2Value in the range of Δ Y/Y values on A, B curve, i.e., in y1~y2Between.
In step (4), the light damping plate is nearly middle grey transmission piece, also with the light transmittance characteristic unrelated with wavelength, table
State as T (λ)=T.In use, requiring in the λ to be detected1~λ2Wave band meets T (λ)=T.
Detection lug V in light damping plate and step (3)0During the transmission UV detection lights that are superimposed together, V0Middle τ1The transmission in region
Light intensity is：
Compare (7) formula and find out that the role of light damping plate is reduction of detection light S with (1) formulacThe radiation intensity of (λ), together
When also reduce transmitted light intensity.
Therefore, it is not difficult to export：
(8) formula shows, the addition of light damping plate, does not change the Δ Y/Y values of two region transmitted light intensities in detection lug, only plays
Change the effect of detection lug transmitted light intensity Y value.
Described light damping plate is identical with the shapes and sizes of detection lug in the bandpass filter in step (1) and step (2).
In step (6), the detector is that radiation of light source can screen the overlapping of optical filter, light damping plate and detection lug, and its is saturating
Penetrate light channel structure figure as shown in Figure 3.S (λ), L (λ), T and τ in figure1、τ2Respectively represent UV curing light sources spectral power distribution,
Screen the light transmittance of two adjacent areas in the spectral transmittance, the light transmittance of light damping plate and detection lug of optical filter, transmitted light intensity Y symbols
(7) formula of conjunction.Wherein light damping plate T can represent the combination of 1 or more than 2 light damping plate, and its light transmittance is all light damping plate light transmittances
Product.
In step (7), the UV light sources use initial, the detection lug V used0In two region light transmittance relation τ2=(1+
n1)τ1In n1It is designed as being more than y1And close to y1Some value, the value Y of one determination of correspondence on the poor threshold curve of brightness.
For the S of determinationc(λ) and τ1, the realization of the Y value of (7) formula decision can be by selecting suitable light damping plate TiTo protect
Card, in addition using V0When T is applied in combination0, Y value now is：
The UV radiation of light source energy is reduced to after mS (λ) by S (λ), in the case that screening colour filter L (λ) is constant, detection
Light Sc(λ) is also reduced to mSc(λ).Detection lug VmCharacterize the Δ Y/ on the poor threshold curve of corresponding brightness during this emittance
Y value is n2, corresponding transmission brightness is Y '.In order to which the transmitted light intensity for ensuring compliance with (7) formula reaches Y ' values, if still configuring dim light
Piece Ti(similarly, using VmWhen T is applied in combinationm), then have：
Then, have：
It is therefore desirable to light damping plate T described in step (5)0And TmMeet (11) formula relation.
To sum up it can be seen that, the function of detection lug is the Δ Y/Y values for determining its two Transmission field, and the function of light damping plate is then tune
The final transmitted light intensity Y value of section, does not influence each other between the two.
Can be the position at light source cover opening in addition, having in step (7) at the position that UV light source lights scatter to, according to
The actual conditions of printing equipment are determined.
In step (7)-(8), the detector prepared using step (6) detects UV curing light source emittance attenuation rates, bag
Include：
I) detection lug V is used in detector using initial in UV light sources0With light damping plate T0.Away from UV light source certain distances
Place, against the observation of UV light sources, now, needs that the luminance difference of two parts light field in detector can be can be clearly seen that.Add light damping plate,
And from the T of maximum transmission rate1Start to change light damping plate successively, until choosing suitable light damping plate TiSo that two parts in detector
The luminance difference of light field is just distinguishable.
Ii) after UV light sources use a period of time, by the detection lug V in step i)0It is replaced by Vm, light damping plate T0It is replaced by
Tm, TiIt is constant.Detector is placed into the Transmission field in identical position in step i), same method observation detector.If
The luminance difference vision of two parts light field is distinguishable, then shows that the attenuation rate of radiation of light source energy not yet reaches design load m；And if two
Part light field without luminance difference, then shows that the attenuation rate of radiation of light source energy has met or exceeded m.
The attenuation degree that radiation of light source can be general can further be estimated.
Former instance, need to change light damping plate Ti, successively from the smaller light damping plate T of light transmittancei+1、Ti+2、…、Ti+nDeng.When
When just having felt the luminance difference of two parts light field, corresponding Ti+nWith TiBe separated by it is more remote, then show radiation of light source can attenuation rate
More it is less than design load m.
Latter instance, the bigger light damping plate T of light transmittance need to be changed successivelyi-1、Ti-2、…、Ti-nDeng.When just feeling two
During the luminance difference of part light field, corresponding Ti-nWith TiIt is separated by more remote, then shows that the attenuation rate of energy of light source is more more than design load
m。
In this way, the perception by brightness difference realizes the detection of UV curing light source radiation energy attenuation rates.
So far, the principle of the detection method can be summarized as：It is determined that on the poor threshold curve of brightness, UV solidification detection light spokes
The two sign points penetrated after the reduction to a certain extent of initial and energy；This 2 points corresponding Δ Y/Y values determine two detection lug V0
And Vmτ2=(1+n1)τ1With τ '2=(1+n2)τ'1In n1、n2Value；On the poor threshold curve of brightness, n1、n2Value correspondence Y,
The realization of Y ' values, is respectively combined in transmitted light path and uses V0、T0、TiAnd Vm、Tm、TiComplete, as long as TmWith T0Between meet relationIt can select suitable light damping plate Ti.So, just UV can be detected by the firm distinguishable of brightness difference
The attenuation rate of optical radiation energy is characterized.
Detector, only need to be placed on UV light by the detection method for the UV curing light source emittance rates of disintegration that the present invention is provided
The ambient light of suitable human eye observation shines position in, and rule is differentiated using the luminance difference of human eye vision, just can detect that UV solidifies
The attenuation rate of energy of light source.Device needed for this method is simple, is not required to power supply, with low cost, and is not required to detecting instrument being placed into
Print on the base material in streamline, it is to avoid the inconvenience used, also in the absence of being damaged by strong UV illumination the problem of, suitable for life
Used in production environment.
Brief description of the drawings
Fig. 1 is the luminance difference threshold value law curve of human eye vision.
Fig. 2 is the partial enlarged drawing of the poor threshold curve of human eye visual brightness.
Fig. 3 is that the inventive method detects light path principle schematic.
Fig. 4 is metal halid lamp UV radiation of light source spectral power change curves.
Fig. 5 is the radiation energy spectral power distribution of LED/light source used in the embodiment of the present invention.
Fig. 6 is the spectral transmittance distribution curve of the different light transmittance film films of the embodiment of the present invention.
The firm distinguishable curve of brightness difference for the centre wavelength 385nmLED light sources that Fig. 7 is set up by the embodiment of the present invention.
Fig. 8 is the enlarged drawing that the embodiment of the present invention changes greatly region with the firm distinguishable curve mean curvature of light source brightness difference.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.After the content of the invention lectured has been read, ability
Field technique personnel can make various changes or modifications to the present invention, and it is claimed that these equivalent form of values equally fall within the application
Scope.
The spectral energy that the embodiment analyzes the conventional metal halid lamp for belonging to traditional mercury lamp class UV light sources first is special
Property.Metal halid lamp is arranged in UV cure test equipment.
Different operating voltage, Yi Jifen when initially being used metal halid lamp using AvaSpec-2048FT-SPU spectrometers
Not after after 2 months, 4 months, 6 months, the radiation energy spectrum work(in the printed matter exit (have scatter UV light) of equipment
Rate distribution function is measured, as a result as shown in Figure 4.Have 5 curves in figure, performance number change from high to low the 1st, the 3rd
~5 are that maximum working voltage and operating voltage are gradually decrease to the radiant power produced during the 60% of maximum when initially using
Distribution.It can be seen that, radiant power distribution is changed significantly with operating voltage reduction, when operating voltage is down to the 60% of maximum,
Overall radiant power about reduces half.The 2nd article of curve that power profile value changes from high to low in figure for experiment 6 months after most
Radiation energy power distribution under big operating voltage.3~5 hours opening times every workday, 6 months are about nearly 500 hours, total
Radiation luminous power about reduces by 15% or so.It was found that being worked when the radiant power changes in distribution of the UV lamp Natural Attenuation is with initial use
The radiant power changes in distribution of voltage change is much like, all shows as the energy of some peak positions and reduces with little or no change, and
The regular reduction of the energy of some peak positions.
The light trigger of most of ink solidifications used in press is mainly the ultraviolet-sensitive 300nm~400nm.
In this wave band, UV lamp radiation energy reduction only has at two wavelength of 314nm and 366nm with little or no the peak position of change.Wherein
The energy of 366nm peak positions is also reduction when Natural Attenuation about 15% and operating voltage are reduced to 70%, thereafter operating voltage
Reduce again, reduce unobvious.Other peak position energy between 300nm~400nm are with use time or operating voltage reduction
Reduction.
The blue or green pigment optical transmission window commonly used in press is near 350nm~370nm, and the optical transmission window of magenta pigment exists
Near 300nm~315nm and 345nm~365nm, the optical transmission window of yellow pigment is attached in 305nm~315nm and 325nm~340nm
Closely, the optical transmission window of mineral black is then acted as near 315nm~325nm and 355nm~365nm in UV light sources to ink solidification
Radiation energy is namely in the radiation in these optical transmission windows.Therefore, by above-mentioned optical transmission window be summarized as 300nm~
Tetra- scopes of 315nm, 315nm~325nm, 325nm~340nm and 345nm~370nm.Table 1 gives UV light sources shown in Fig. 4
When radiant power changes, in this four wave-length coverages of interest, and between 380nm~400nm Change of light energy relation, with ripple
The radiation energy rate of change that the ratio of corresponding gross energy embodies when gross energy in section is radiated with peak power is characterized.
Table 1：The radiation energy rate of change of UV light source different-wavebands
If had by each wave band radiation energy to ink solidification in terms of identical effect comes, each color ink solidification light window
Average radiation energy rate of change is as shown in table 2.
Table 2：The radiation energy rate of change of each conventional UV optical bands of color ink solidification
The rate of change of radiation energy between the data of analytical table 2, the only the 6th row 380nm~400nm, which is respectively less than in UV light sources, to be carried
Supply each color ink and play the radiation energy rate of change of solidification, and characterize 3rd~5 column data of the radiation energy attenuation rate less than 70% then
Show, the radiation energy rate of change between 380nm~400nm changes with the radiation energy for being supplied to each color ink to play solidification in UV light sources
Rate is suitable.
Above-mentioned analysis shows, for this metal halogen UV curing light sources, can use the change of radiation energy between 380nm~400nm
Rate reflects other changes for effectively solidifying wave band radiation energy.Can be using the bandpass filter transmitted in 380nm~400nm wave bands
Radiation energy between wherein 380nm~400nm is extracted and is used as detection light.
Another kind of LED UV curing light sources, including centre wavelength is respectively 365nm, 375nm, 385nm, 395nm and 405nm
Narrow wavestrip LED.Because such optical source wavelength scope is narrower in itself, then itself can be used as detection light.
On the one hand the embodiment is represented visual by the use of the LED/light source that centre wavelength is 385nm as detection light
LED class curing light sources, on the other hand also represent the detection light that metal halogen UV curing light sources are extracted.
The radiation energy spectral power distribution of the LED light is as shown in Figure 5.
Here is that the specific implementation step of radiation of light source energy attenuation rate detection is realized using the inventive method, including：
1st, detection light is determined
It is detection light to determine the LED light, and does not use optical filter and screened.Because of the perceived wavelength scope of human eye vision
For between 380nm~780nm, and the LED light can be distributed and almost end in 420nm, so, determine the EWL model of detection light
Enclose for 380nm~420nm.
2nd, detection lug is prepared
Prepare the film film used in material selection press.The film is imaged by the metallic silver particles of black, is had
Comparatively ideal neutral grey characteristic.Fig. 6 show its spectral transmittance distribution curve after being imaged through different-energy illumination.
See from Fig. 6, its light transmittance changes less between 380nm~420nm, can be approximately considered its spectral transmittance and ripple
Length is unrelated.
The preparation process of detection lug is：It is arrangement on the plate-making digital document of split (580mm × 860mm) in a size
Set respectively in a series of two regions that sizes are adjacent 25mm × 50mm in 50mm × 50mm imaging sub-district, each sub-district
N% and (N+n) % imaging controlling value, N values form the son of several different control parameters from 40 to 100 n% interval variations
Area.N=0.5 is set, and 1.0,1.5,2.0,2.5,3.0 six kinds of situations prepare six image files, by film film output equipment
Through exposure and development and it is fixing after, form several transmission piece prints, and its spectrum printing opacity is measured by ultraviolet-visible spectrophotometer
Rate.The serial print is selected for experiment and detection lug.
3rd, light damping plate is prepared
It is same to prepare light damping plate using film film.The method in implementation steps 2 is same as, 50mm × 50mm is prepared
The consistent film transmission sample of light transmittance in area, each sub-district Numerical Control value is spaced 1%, 51 altogether from 40% to 100%.
Its spectral transmittance is also measured by ultraviolet-visible spectrophotometer after output, it the descending sequence of light transmittance is pressed into, as subtracting
Mating plate group is used.
4th, for the LED coloured light that centre wavelength is 385nm, its brightness just distinguishable poor law curve is set up
The binocular curve of the poor threshold value rule of embodiment brightness to be utilized, but see the binocular curve of document shown in Fig. 1
And it is imperfect, also without whether variant between clear and definite different color light.Then, experiment has initially set up the binocular brightness of the light source
Poor threshold curve.
The method of use is：In dark room conditions, by LED/light source horizontal positioned (light source be bar-shaped spot light, with compared with
The small angle of divergence), allow its central ray in the horizontal direction, the diverse location on its light emission level direction, then with different
Optical radiation energy；The spectral radiant power distribution of its diverse location is measured, variation relation of its spectral radiant energy with position is obtained,
To obtain the spectral radiant energy of unmeasured any position by it；At 43 different positions of radiation energy, with prepared number
Individual detection lug vision picks out luminance difference corresponding with the position just distinguishable print, and the position of sample small can be moved during being somebody's turn to do
It is dynamic, to reach optimal luminance difference threshold decision；Luminance difference threshold value detection lug corresponding to each position, two region light transmittances with
Average transmittance meter between 380nm~420nm, the transmitted light intensity in two regions is calculated according to (1), (2) two formulas, its Y and △ is obtained
Y/Y values；Y and △ Y/Y values are calculated by all 43 location points, the poor threshold curve of brightness are drawn out, as a result as shown in Figure 7.With
Fig. 1 documents give the rule of the poor resolution curve of brightness consistent.
5th, detection lug V is determined0And Vm
Required according in foregoing detection method step (3), need to select to determine detection lug V0It is required that τ2=(1+n1)τ1In
n1With detection lug VmIt is required that τ '2=(1+n2)τ'1In n2Value.
Fig. 8 show the enlarged drawing that Fig. 7 curve mean curvatures change greatly region.Determine that curve mean curvature changes greatly region
In D1(0.30,0.08), D22 points of (0.17,0.12) corresponds to that UV light sources to be detected are initial and emittance decays 20% respectively
Corresponding detection lug V afterwards0N1With detection lug VmN2Value, i.e. n1=0.08, n2=0.12, then require detection lug V0τ2=
1.08τ1, detection lug Vmτ '2=1.12 τ '1。
Each measured controlling value exports the light transmittance of film film, selects and meets τ2=1.08 τ1Detection lug point
Not Ju You 45% and 40.5% controlling value, meet τ '2=1.12 τ '1Detection lug respectively have 47.5% and 41% control
Value.Its corresponding light transmittance be shown in Table 3 in the 1st, 2 column datas.
Table 3：The characteristic parameter (m=0.8) of embodiment UV optical radiation energy attenuation rate detector elements
6th, light damping plate T is determined0And Tm
According to principle, T in step (4)0Need higher light transmittance (being preferably more than 0.3), select for controlling value 48% it is defeated
The film film gone out, light transmittance is 0.3406；TmSelection need coincidence formula (11), i.e. Tm=T0τ1Y′/mτ'1Y=0.3406 ×
0.3604 × 0.1719/ (0.8 × 0.3467 × 0.3013)=0.2525, the film film of 60% controlling value output is substantially met
The requirement, actual measurement light transmittance is 0.2536.The data are included in the 3rd row in table 3.
7th, the preparation of detector
A diameter about 40mm has been made of black hard card paper, 100mm cylinder is about.In the middle part of its length point
It is not separated by about 5mm and has cut three opennings with 1mm thickness, otch accounts for the 90% of cylinder cross section.Three otch point
Not to place detection lug V0Or Vm, light damping plate T0Or Tm, and light damping plate Ti.Thereafter, it is of the same race in a side joint one for the cylinder
The horn mouth that black hard card paper makes, bell-mouthed side length about 200mm, outside diameter about 150mm.In use, eyes are pasted
Bell-mouthed outside observation.
The use of the purpose of black material is to avoid the influence of internal reflected light；The middle part that three otch are made in straight tube can be reduced
The entrance of external stray light；The effect of cone is so that eyes press close to the influence that exterior light is avoided when observing and meet dark situation
Condition.
8th, the mark of prompt radiation energy
In practicality, to the mark of used time at the beginning of light source, detector need to be placed at light source cover opening according to step i), or
Be in equipment somewhere it can be seen that the position of UV light source lights or scattered light.
In the embodiment, at a certain position in selection horizontal positioned LED/light source horizontal direction used in radiation light field
Light radiation represents the test position of practical light source.Afterwards, the V that will be selected in 5,6 steps0And T0It is placed on the detector of the 7th step making
In, V is observed at selected location0In two adjacent light fields brightness, it is now clear and legible.According to step i) method, the energy
Mark need to be in V0And T0A light damping plate T is added in overlapping light pathi, and now, need that V can be reached0In two adjacent light fields it is bright
Degree difference is just distinguishable.Through trying out one by one, the light damping plate for selecting controlling value for 66% output meets the requirements, its light transmittance TiTest
For 0.2151 (being included in the 4th row in table 1).
9th, the mark of emittance after decaying
According to step ii) method, by the V in detector0And T0It is replaced by Vm、Tm, but light damping plate TiKeep constant, and will
Observation position is moved to position (position set up by the 4th step and the radiation energy that radiation energy is reduced to the 8th step prompt radiation energy 80%
Relation determine), now, need can reach VmIn adjacent two light field luminance difference it is just distinguishable.Test result indicates that, the choosing of the 8th step
The T selectediThis requirement can be met.
In addition, the light damping plate T used in the 8th, 9 stepsi, with V0And T0Combination should reach the D that (9) formula is determined1Point is corresponding bright
Angle value 0.30, and and VmAnd TmThe D that (10) formula is determined need to be reached during combination2The corresponding brightness value 0.17 of point.It is computed, this two
Brightness value is respectively 0.3013 and 0.1719 (being included in the 5th row in table 3), has reached design object.
Said process shows, based on luminance difference threshold curve, passes through sign point D reasonable in design1And D2, thus, further
Determine detection lug V0And VmAnd light damping plate T0And Tm, just can select suitable in the detection of radiation of light source energy attenuation rate
Light damping plate Ti, with it is characterized go out radiation of light source energy attenuation rate.
In practicality, light damping plate series TiIt there is adjacent light damping plate light transmittance and differ the problem of being advisable.Difference is too small,
Application effect can not embody difference；Difference is too big, is probably difficult to find that brightness just distinguishable poor accurate status.It will be brought to judge
It is difficult.Found in the embodiment, the light damping plate made with 1% controlling value interval, adjacent light damping plate light transmittance when order is arranged
Difference about 0.007, using when the not only difference that visually easily judges, can also embody bright under different emittance
The poor threshold value of degree, is that the suitable light transmittance of light damping plate group is poor.
In practicality, also there are problems that the individual difference of observation personnel.Different personnel, T when corresponding brightness difference is just distinguishablei's
Selection is different.Find that this species diversity is almost only occurred on adjacent light damping plate in our experiment, i.e., most of persons
Select Ti, also someone selection Ti-1Or Ti+1.Illustrated with situation in embodiment, if selection is Ti-1(65% controlling value), rather than Ti
(66% controlling value), light transmittance is respectively 0.2208 and 0.2151.Corresponding the latter is correct m=0.8, and the former equivalent to
M=0.771 effect.I other words, should be by Ti-1It is objectively corresponding to decay to 77.1% journey of initial value for emittance
Degree, but misidentification is in order to meet the m=0.8 of design situation.This is the error being likely to occur in practical application, also indicates that the reality
Applying a detection method has ± 3% or so precision.
Find out from above-described embodiment, the present invention differentiates rule using the luminance difference of human eye vision, by rationally designing printing opacity
The transmittance characteristics of the light field of material two, and the combination application from different light transmittances transmission piece, by the change of radiation of light source energy
Rate is embodied in the just distinguishable mode of two light field luminance differences.This method is UV curing light source energy attenuation rates in print production
Detection provides a kind of new method.
Those of ordinary skills in the art should understand that：The specific embodiment of the present invention is the foregoing is only, and
The limitation present invention is not used in, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc.,
It should be included within protection scope of the present invention.
Claims (10)
1. a kind of detection method of UV curing light sources emittance attenuation rate, comprises the following steps：
(1) determine that in UV curing light sources spectral radiant energy to be detected solidification wave band radiation energy attenuation degree can have been represented
Wave band is used as detection light；
(2) detection lug V is prepared by middle grey light transmissive material0And Vm, detection lug includes two adjacent and different areas of light transmittance
Domain；V0The light transmittance in two regions is respectively τ1And τ2, and τ2=(1+n1)τ1；VmThe light transmittance in two regions is respectively τ '1With
τ'2, and τ '2=(1+n2)τ'1；n1、n2Respectively detection lug V0、VmTwo regions light source visual brightness just it is distinguishable it is poor with it is bright
Ratios delta Y/Y, the Δ Y '/Y ' of degree, and n2>n1, Y and Y ' are respectively n1、n2It is worth corresponding brightness；
(3) light damping plate group, including the light damping plate that multiple light transmittances are gradually changed, the shape of light damping plate are prepared by middle grey light transmissive material
Shape and area are identical with detection lug；
(4) two light damping plate T are prepared0And Tm, light transmittance TmWith T0Meet：Wherein m represents radiation of light source energy
Amount decays to the multiple of initial value；
(5) light source screening part, detection lug and light damping plate are overlaped, are placed in a tubular device, composition can vision
Observe the detector of light transmission state；
(6) when UV light sources use initial, detection lug V is used in detector0With light damping plate T0, against the observation of UV light sources, addition is closed
Suitable light damping plate Ti, make in detector observe two parts light field luminance difference it is just distinguishable；
(7) UV light sources were used after a period of time, and detection lug V is used in detectormWith light damping plate Tm, light damping plate TiIt is constant, away from UV
The same position of light source, against the observation of UV light sources, whether two parts light field observed in detector reaches that luminance difference just may be used
Whether the attenuation rate for distinguishing to determine radiation of light source energy reaches m times of design.
2. the detection method of UV curing light sources emittance attenuation rate according to claim 1, it is characterised in that：Described
Detection light is the wave band that representative plays solidification wave band radiation energy attenuation degree, can be obtained by using bandpass filter.
3. the detection method of UV curing light sources emittance attenuation rate according to claim 2, it is characterised in that：In printing
In industry, for metal halogen UV curing light sources, detection light is used as using 380nm~400nm wave band；Solidify light for LED UV
Source, detection light is used as using the wave-length coverage of light source in itself.
4. the detection method of UV curing light sources emittance attenuation rate according to claim 2, it is characterised in that：The band
Pass filter, detection lug are identical with the shapes and sizes of light damping plate.
5. the detection method of UV curing light sources emittance attenuation rate according to claim 4, it is characterised in that：Described
Bandpass filter, detection lug and light damping plate are shaped as square or circular, and the length of side or diameter are between 40mm~50mm.
6. the detection method of UV curing light sources emittance attenuation rate according to claim 1, it is characterised in that：n1And n2
The just distinguishable poor and brightness ratio Δ Y/Y of light source visual brightness is chosen for brightness Y change curves middle part, the very fast model of Curvature varying
Interior Δ Y/Y values are enclosed, and have n2>n1。
7. the detection method of UV curing light sources emittance attenuation rate according to claim 1, it is characterised in that：Described
In light damping plate group, the transmissivity difference between adjacent light damping plate is 0.007, and light transmittance is 0.4, minimum 0.05 to the maximum.
8. the detection method of UV curing light sources emittance attenuation rate according to claim 1, it is characterised in that：UV light sources
After a period of time, if the luminance difference vision for two parts light field observed in detector is distinguishable, show light source spoke
The attenuation rate for penetrating energy not yet reaches design load m；And if two parts light field shows radiation of light source energy without luminance difference
Attenuation rate met or exceeded m.
9. the detection method of UV curing light sources emittance attenuation rate according to claim 8, it is characterised in that：If by examining
The luminance difference vision for surveying two parts light field observed in device is distinguishable, then changes light damping plate Ti, it is smaller from light transmittance successively
Light damping plate；When just feeling the luminance difference of two parts light field, corresponding light damping plate Ti+nWith TiIt is separated by more remote, then shows
The attenuation rate of radiation of light source energy is more less than design load m.
10. the detection method of UV curing light sources emittance attenuation rate according to claim 8, it is characterised in that：If by
Two parts light field observed in detector without luminance difference, then changes the bigger light damping plate of light transmittance successively；When just
When feeling the luminance difference of two parts light field, corresponding light damping plate Ti-nWith TiIt is separated by more remote, then shows the attenuation rate of energy of light source
More it is more than design load m.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62106339A (en) * | 1985-11-05 | 1987-05-16 | Toray Ind Inc | Method for measuring light transmission loss of optical fiber with high accuracy |
| JP2004234833A (en) * | 2003-01-29 | 2004-08-19 | Samsung Electronics Co Ltd | Compatible optical pickup and method for detecting its optical output quantity |
| CN1789930A (en) * | 2004-12-17 | 2006-06-21 | 上海雷硕医疗器械有限公司 | Light source energy detection and display system for medical instrument |
| CN101067598A (en) * | 2007-05-29 | 2007-11-07 | 中国科学院安徽光学精密机械研究所 | Double-light path photoelectric detector and method for detecting light decrement thereof |
| CN101282489A (en) * | 2008-04-24 | 2008-10-08 | 北京中星微电子有限公司 | Light source detection apparatus and method as well as image processing method |
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2015
- 2015-11-05 CN CN201510747163.0A patent/CN105424321B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62106339A (en) * | 1985-11-05 | 1987-05-16 | Toray Ind Inc | Method for measuring light transmission loss of optical fiber with high accuracy |
| JP2004234833A (en) * | 2003-01-29 | 2004-08-19 | Samsung Electronics Co Ltd | Compatible optical pickup and method for detecting its optical output quantity |
| CN1789930A (en) * | 2004-12-17 | 2006-06-21 | 上海雷硕医疗器械有限公司 | Light source energy detection and display system for medical instrument |
| CN101067598A (en) * | 2007-05-29 | 2007-11-07 | 中国科学院安徽光学精密机械研究所 | Double-light path photoelectric detector and method for detecting light decrement thereof |
| CN101282489A (en) * | 2008-04-24 | 2008-10-08 | 北京中星微电子有限公司 | Light source detection apparatus and method as well as image processing method |
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