CN103728023A - Lovibond chroma scale spectrograph color measuring device and method - Google Patents

Abstract

The invention discloses a Lovibond chroma scale spectrograph color measuring device and method. The advantage that a CCD spectrograph can well measure spectral characteristics is used, and a Lovibond chroma scale color measuring technical scheme which can guarantee the accurate and uniform nationwide quantity value is provided. On one hand, the relative spectral power of a standard light source is stored in a computer; on the other hand, all Lovibond entitative color pieces can be changed to digital Lovibond standard color pieces, and a standard spectral characteristic transmittance function is formed regularly and stored in the computer; then, combination matching is conducted on the digital Lovibond standard color pieces through the method of successive approximation, a combination matching result which is uniform with the color of a sample is obtained and the Lovibond chroma scale value formed by combining the digital Lovibond standard color pieces is the color value of the sample to be measured. The color measuring device and method have the advantages of being high in color measuring accuracy, capable of avoiding color measuring errors caused by processing errors of the entitative color pieces and also capable of avoiding measuring errors caused by human eye visual fatigue, having no color vision requirements for detection personnel and the like.

Description

Lovibond colour scale spectrometer color measuring device and method for measuring color thereof

Technical field

The present invention relates to a kind of Lovibond colour scale spectrometer color measuring device and method for measuring color thereof.

Background technology

Because the demand in colorimetry field there are differences, the result so the variation of colour examining technical development is inevitable, but be mostly, based on existing national standard and the clear and definite method of international standard, to have the advantages that specificity is strong.Due to the development of advancing by leaps and bounds of science and technology, the miniature spectrometer growing up from the application of CCD technology has been widely used in each field that spectral measurement needs, is also used to colour examining field.

Lovibond colour meter is a kind of red with one group, yellow, the color chips group of green three primary colours color chips and one group of grey color chips composition, whether its method of measuring color is in visualization cylinder, to observe sample visual field to mate consistent with consistency of colour in Lovibond color chips visual field simultaneously, when the sample of needs measurement is placed on specimen holder, can observe the color of sample, at this moment, by selecting can mate in Lovibond color chips group the part color chips of color sample, under essentially identical light source condition, carry out color-match, when the color in Lovibond color chips visual field and color in sample visual field are the most consistent, in Lovibond color chips group, form the represented color of part color chips that is equal to color sample and be the color of sample under Lovibond colour scale.While using Lovibond colour meter to carry out colour examining, user's vision is had to certain requirement, as colour blindness, tritanope can not carry out this work, in addition, the fatigue of eyes also can produce measuring error.But also do not have at present application of spectral instrument colour examining technology to replace the spectroscopic methodology Lovibond colour scale colour photometer of (visual) Lovibond colour meter.

Summary of the invention

The present invention is the weak point existing in above-mentioned prior art for avoiding, a kind of Lovibond colour scale spectrometer color measuring device and method for measuring color thereof are provided, utilize spectrometer under a stable light source condition, measure the transmittance of whole standard Lovibond color chips, measurement result is carried out after necessary correction, together with the spectral power function of standard sources, only need to implement unique digitizing storage once, just can obtain digitizing standard Lovibond color chips and digitizing standard sources; When recording after the spectral transmittance of sample, just can calculate its color parameter in conjunction with digitizing standard sources, then utilize digitizing standard Lovibond color chips to combine and calculate the rear color parameter of its combination in conjunction with digitizing standard sources, when some colors that combines energy optimum matching sample, this optimum matching combines the Lovibond colour scale color value that expressed Lovibond colour scale color value is exactly sample.

The invention provides a kind of Lovibond colour scale spectrometer color measuring device.

Lovibond colour scale spectrometer color measuring device, its design feature is to comprise light processor and calculation element (9); Described light processor comprises light source (1), convex lens, parallel beam (3), specimen holder (4), optical fiber daylighting head (6), beam Propagation optical fiber (7) and CCD spectrometer (8); Described convex lens comprise the first convex lens (2) and the second convex lens (5); The light that light source (1) sends, by becoming parallel beam (3) after the first convex lens (2), parallel beam (3) is through the standard colorimetric sheet in specimen holder (4) and specimen holder (4) or the colourity sheet of sample, enter after converging at a bit after the second convex lens (5) and gathered by optical fiber daylighting head (6), optical fiber daylighting head (6) inputs to CCD spectrometer (8) by the light signal gathering by beam Propagation optical fiber (7), CCD spectrometer (8), through light splitting and opto-electronic conversion, is passed to described calculation element (9) and is carried out colour examining calculating after processing.

The design feature of Lovibond colour scale spectrometer color measuring device of the present invention is also:

The spectral measurement ranges of described CCD spectrometer is [V _min, V _max], wherein V _minbe not more than 380nm, V _maxbe not less than 780nm, the resolution of spectrometer is not less than 2.5nm.

Described calculation element (9) is computing machine or panel computer.

The present invention also provides a kind of method for measuring color of above-mentioned Lovibond colour scale spectrometer color measuring device.

As shown in Figure 2, comprise the steps:

Step 1: adopt the D65 light source that is equal to Lovibond tintmeter light source, its relative spectral power distribution S (λ) is carried out to datumization preservation, as datumization light source;

Step 2: select a stable light source (1) as work light, measure the relative spectral power distribution S of described light source (1) _w(λ);

Step 3: one of them the Lovibond standard colorimetric sheet in the multiple Lovibond standard colorimetric sheets that use as standard colorimetric sheet is placed in to specimen holder (4), measures relative spectral power and distribute

; Calculate the transmittance function of this Lovibond standard colorimetric sheet

Step 4: repeating step 3, obtains the transmittance function of each the Lovibond standard colorimetric sheet in multiple Lovibond standard colorimetric sheets

wherein, k is the number of multiple Lovibond standard colorimetric sheets;

Step 5: obtaining after the transmittance function of each standard Lovibond colourity sheet of all standard Lovibond colourity sheets, one group of transmittance function to homochromy Lovibond colourity sheet carries out artificial correcting process, the regularity that the interval of its transmission ratio in each wavelength points is consistent with the interval of its standard value, then together with the standard value of corresponding colourity sheet, form datumization Lovibond colourity sheet, be stored in computing machine, for the calculating output of result;

Step 6: sample colourity sheet is placed in to specimen holder, measures relative spectral power and distribute

calculate the transmittance function of this sample

Step 7: the lightness of calculation sample, chroma, hue angle, in order to coupling;

Step 8: according to the result of step 7, according to certain rule, select one or more datumization Lovibond colourity sheets to combine, lightness, chroma, the hue angle of the Lovibond colourity sheet after calculation combination also carried out consistance with lightness, chroma, the hue angle of sample and mated, and the Lovibond colour scale value that best consistance is mated one group of datumization Lovibond colourity sheet representative used is the Lovibond colour scale value of sample.

In described step 8, the method for consistance coupling is: with the color parameter of datumization Lovibond standard color chips coupling sample; Lightness, hue angle and chroma per sample selected datumization Lovibond color chips, successively approaches coupling, and its matching process is used the stack of datumization Lovibond color chips, and after stack, the transmittance of color chips is according to τ (λ)=τ ₁(λ) τ ₂(λ) τ ₃(λ) ... τ _x(λ) calculate, the main line of coupling is that hue angle successively approaches, and takes into account lightness and chroma.

The method of described consistance coupling is: adopt part retrieval approaching method successively again; First large chromatic value color chips is combined, the look parameter after combination is become to database table; When after sample look gain of parameter, carry out match selection, select a best record, and then successively approach coupling with little chromatic value color chips, then obtain optimum value.

The method of described consistance coupling is: adopt complete combination, the Lovibond color chips that is about to all datumizations combines, calculate color value and each combination lightness, hue angle and the chroma isochrome parameter of the Lovibond colour scale of all each combinations, then grouping, forms multiple database grouping sheets; When after lightness, hue angle and the chroma isochrome gain of parameter of sample, in database table, carry out match selection, select a most consistent best record of lightness, hue angle and chroma isochrome parameter in database table, in this best record, the color value of Lovibond colour scale is the color value of sample.

Compared with the prior art, beneficial effect of the present invention is embodied in:

Lovibond colour scale spectrometer method for measuring color of the present invention, utilizes the CCD spectrometer advantage of measure spectrum characteristic well, has realized the alternative observer's of instrument object, avoids the visually specific (special) requirements to people.

Lovibond colour scale spectrometer method for measuring color of the present invention, the relative spectral power of standard sources is stored in computing machine, form digitizing light source, by the spectral transmittance function standard of all Lovibonds color chips in kind make the Lovibond color chips parameter of standard, and be stored in computing machine, the datumization Lovibond standard color chips of formation standard, thus realize copy property, avoid a large amount of duplicate measurementss.

Lovibond colour scale spectrometer method for measuring color of the present invention, by the spectral transmittance of measuring sample, under datumization standard sources condition, according to the calculating of color parameter in concerned countries standard, obtain relevant colors aspect technical data, mate with the datumization Lovibond colourity sheet color parameter being stored in computing machine, obtain the color take Lovibond colour scale as result about sample, avoid the mismachining tolerance of colourity sheet in kind to cause colour examining error, thereby be conducive to guarantee that national value is accurately unified.

Lovibond colour scale spectrometer method for measuring color of the present invention, replace Lovibond color chips in kind with datumization standard Lovibond color chips, realize Auto-matching, the Lovibond tintmeter that can substitute current visual relatively colorimetry method completely needs artificial driver plate coupling, has the advantages such as high accuracy and fast and easy.

Accompanying drawing explanation

Fig. 1 is the structural representation of the color measuring device of Lovibond colour scale spectrometer method for measuring color of the present invention.

Fig. 2 is the process flow diagram of the matching process of Lovibond colour scale spectrometer method for measuring color of the present invention.

Below pass through embodiment, and the invention will be further described by reference to the accompanying drawings.

Embodiment

Referring to Fig. 1 and Fig. 2, Lovibond colour scale spectrometer color measuring device, as shown in Figure 1, the color measuring device of Lovibond colour scale spectrometer colour examining comprises light processor and calculation element 9; Described light processor comprises light source 1, convex lens, parallel beam (3), specimen holder 4, optical fiber daylighting 6, beam Propagation optical fiber 7 and CCD spectrometer 8; Described convex lens comprise the first convex lens 2 and the second convex lens 5; The light that light source 1 sends, by becoming parallel beam 3 after the first convex lens 2, parallel beam 3 is through the standard colorimetric sheet in specimen holder 4 and specimen holder 4 or the colourity sheet of sample, enter after converging at a bit after the second convex lens 5 and gathered by optical fiber daylighting 6, optical fiber daylighting 6 inputs to CCD spectrometer 8 by the light signal of collection by beam Propagation optical fiber 7, CCD spectrometer 8, through light splitting and opto-electronic conversion, is passed to described calculation element 9 and is carried out colour examining calculating after processing.

Light source 1 is pointolite, the light that light source 1 sends, by becoming parallel beam 3 after the first convex lens 2, parallel beam 3 is through the standard colorimetric sheet in specimen holder and specimen holder or the colourity sheet of sample, enter after converging at a bit after the second convex lens 5 and gathered by optical fiber daylighting 6, optical fiber daylighting 6 inputs to CCD spectrometer 8 by the light signal of collection by beam Propagation optical fiber 7, and CCD spectrometer 8, through light splitting and opto-electronic conversion, is passed to described computing machine 9 and carried out colour examining calculating after processing.Described parallel beam 3 is less than 4 ° of visual fields; Described specimen holder 4 is placed on the path of parallel beam 3, and described parallel beam 3 can be intactly through the sample in specimen holder.

The spectral measurement ranges of described CCD spectrometer is [V _min, V _max], wherein V _minbe not more than 380nm, V _maxbe not less than 780nm, the resolution of spectrometer is not less than 2.5nm.

Described calculation element 9 is computing machine or panel computer.

The method for measuring color of described Lovibond colour scale spectrometer color measuring device, is characterized in that, as shown in Figure 2, comprises the steps:

Step 1: adopt the D65 light source that is equal to Lovibond tintmeter light source, its relative spectral power distribution S (λ) is carried out to datumization preservation, as datumization light source, be stored in database pre-established in computing machine;

Step 2: select a stable light source 1 as work light, measure the relative spectral power distribution S of described light source 1 _w(λ);

Step 3: one of them the Lovibond standard colorimetric sheet in the multiple Lovibond standard colorimetric sheets that use as standard colorimetric sheet is placed in to specimen holder 4, measures relative spectral power and distribute ; Calculate the transmittance function of this Lovibond standard colorimetric sheet

Step 4: repeating step 3, obtains the transmittance function of each the Lovibond standard colorimetric sheet in multiple Lovibond standard colorimetric sheets

wherein, k is the number of multiple Lovibond standard colorimetric sheets;

Step 5: obtaining after the transmittance function of each standard Lovibond colourity sheet of all standard Lovibond colourity sheets, one group of transmittance function to homochromy Lovibond colourity sheet carries out artificial correcting process, the regularity that the interval of its transmission ratio in each wavelength points is consistent with the interval of its standard value, then together with the standard value of corresponding colourity sheet, form datumization Lovibond colourity sheet, be stored in computing machine 9, for the calculating output of result;

Multiple Lovibond standard colorimetric sheets are carried out to correspondence sign according to Lovibond colourity sheet sign respectively, be stored in the database within computing machine, in the time of sign, the value of Lovibond colourity sheet is set separately to the corresponding preservation of field again, for the calculating output of result; The homochromy Lovibond colourity sheet that same material is made, if there is non-rule transmittance situation, can carry out necessary desirability rule optimization, optimum results can guarantee that measurement result is accurately unified, while using as colour examining, above data can be inputted by data (copy) mode completely and store, and form datumization Lovibond colourity sheet, needn't duplicate measurements.Same method is measured sample relative spectral power and is distributed, and obtains the transmittance function of sample.

Step 6: sample colourity sheet is placed in to specimen holder 4, measures relative spectral power and distribute

; Calculate the transmittance function of this sample

Step 7: according to color parameters such as the lightness of CIE1931 and standard GB/T/T7921-2008 calculation sample, chroma, hue angles, in order to coupling;

Step 8: according to the result of step 7, according to certain rule, select one or more datumization Lovibond colourity sheets to combine, lightness, chroma, the hue angle of the Lovibond colourity sheet after calculation combination also carried out consistance with lightness, chroma, the hue angle of sample and mated, and the Lovibond colour scale value that best consistance is mated one group of datumization Lovibond colourity sheet representative used is the Lovibond colour scale value of sample.

In described step 8, the method for consistance coupling is: with the color parameter of datumization Lovibond standard color chips coupling sample; Lightness, hue angle and chroma per sample selected datumization Lovibond color chips, successively approaches coupling, and its matching process is used the stack of datumization Lovibond color chips, and after stack, the transmittance of color chips is according to τ (λ)=τ ₁(λ) τ ₂(λ) τ ₃(λ) ... τ _x(λ) calculate, the main line of coupling is that hue angle successively approaches, and takes into account lightness and chroma.

The method of described consistance coupling is: adopt part retrieval approaching method successively again; First large chromatic value color chips is combined, the look parameter after combination is become to database table; When after sample look gain of parameter, carry out match selection, select a best record, and then successively approach coupling with little chromatic value color chips, then obtain optimum value.

The method of described consistance coupling is: adopt complete combination, the Lovibond color chips that is about to all datumizations combines, calculate color value and each combination lightness, hue angle and the chroma isochrome parameter of the Lovibond colour scale of all each combinations, then grouping, forms multiple database grouping sheets; When after lightness, hue angle and the chroma isochrome gain of parameter of sample, in database table, carry out match selection, select a most consistent best record of lightness, hue angle and chroma isochrome parameter in database table, in this best record, the color value of Lovibond colour scale is the color value of sample.

The spectral measurement ranges of described spectrometer 8 is 380nm～780nm, and resolution is not less than 2.5nm; The light that described light source 1 sends becomes parallel beam 3 through convex lens 2, by specimen holder 4 places, and then be converged to optical fiber daylighting 6 by convex lens 5, and through beam Propagation optical fiber 7, entering CCD spectrometer 8, numerical information after treatment passes computing machine and stores and calculate colour examining result;

In step 7, first according to the computing formula of CIE1931 standard colorimetric system tristimulus values X, Y, Z

In formula: X, Y, Z---CIE1931 standard colorimetric system tristimulus values;

---the spectral distribution of colour stimulus function;

---CIE1931 standard colorimetric observer color matching function;

Δ λ---wavelength interval, the present invention gets 5nm;

K---normalization coefficient,

When

time, representing the stimulation function spectral distribution of the transmitted colour of datumization Lovibond colourity sheet and sample, the tristimulus values computing formula of transmitted colour that obtains datumization Lovibond colourity sheet and sample is as follows:

$X=k\underset{380}{\overset{780}{\mathrm{\Σ}}}\mathrm{\τ}\left(\mathrm{\λ}\right)\·S\left(\mathrm{\λ}\right)\·\stackrel{\‾}{x}\left(\mathrm{\λ}\right)\mathrm{\Δ\λ}$

$Y=k\underset{380}{\overset{780}{\mathrm{\Σ}}}\mathrm{\τ}\left(\mathrm{\λ}\right)\·S\left(\mathrm{\λ}\right)\·\stackrel{\‾}{y}\left(\mathrm{\λ}\right)\mathrm{\Δ\λ}$

$Z=k\underset{380}{\overset{780}{\mathrm{\Σ}}}\mathrm{\τ}\left(\mathrm{\λ}\right)\·S\left(\mathrm{\λ}\right)\·\stackrel{\‾}{z}\left(\mathrm{\λ}\right)\mathrm{\Δ\λ}$

When

time, represent that the tristimulus values computing formula of standard sources is as follows:

$X_n=k\underset{380}{\overset{780}{\mathrm{\Σ}}}S\left(\mathrm{\λ}\right)\·\stackrel{\‾}{x}\left(\mathrm{\λ}\right)\mathrm{\Δ\λ}$

Y _n=100

$Z_n=k\underset{380}{\overset{780}{\mathrm{\Σ}}}S\left(\mathrm{\λ}\right)\·\stackrel{\‾}{z}\left(\mathrm{\λ}\right)\mathrm{\Δ\λ}$

Wherein $k=100/\underset{380}{\overset{780}{\mathrm{\Σ}}}S\left(\mathrm{\λ}\right)\·\stackrel{\‾}{y}\left(\mathrm{\λ}\right)\mathrm{\Δ\λ}$ For normalization coefficient

The relative spectral power of S (λ)---D65 light source distributes;

The transmittance function of the datumization Lovibond color chips after the transmittance function of τ (λ)---sample or combination;

According to the computing formula computational data Lovibond colourity sheet in standard GB/T/T7921-2008 and lightness, chroma, the hue angle of sample, computing formula is as follows again:

$u^{\′}=\frac{4X}{X+15Y+3Z},{u_n}^{\′}=\frac{4X_n}{X_n+15Y_n+3Z_n}$

$v^{\′}=\frac{9Y}{X+15Y+3Z},{v_n}^{\′}=\frac{{9Y}_n}{X_n+15Y_n+3Z_n}$

Thereby can calculate:

Lightness: $L*=116f\left(\frac{Y}{Y_n}\right)-16$

U*=13L* (u'-u gets back _n')

v*=13L*(v'-v _n')

Chroma: $C_{\mathrm{uv}}^{*}=\sqrt{{\left(u^{*}\right)}^2+{\left(v^{*}\right)}^2}$

Hue angle: $h_{\mathrm{uv}}=\arctan \left(\frac{v^{*}}{u^{*}}\right)$

In above-mentioned " lightness " formula,

When $\frac{Y}{Y_n}>{\left(\frac{24}{116}\right)}^3$ Time, $f\left(\frac{Y}{Y_n}\right)={\left(\frac{Y}{Y_n}\right)}^{\frac{1}{3}}$

When $\frac{Y}{Y_n}\≤{\left(\frac{24}{116}\right)}^3$ Time, $f\left(\frac{Y}{Y_n}\right)=\frac{841}{108}\·\frac{Y}{Y_n}+\frac{16}{116}$

Then: according to the result of step 7, according to certain rule, select one or more datumization Lovibond colourity sheets to combine, lightness, chroma, the hue angle of the Lovibond colourity sheet after calculation combination also carried out consistance with lightness, chroma, the hue angle of sample and mated, and the Lovibond colour scale value of best coupling one group of datumization Lovibond colourity sheet representative used is the Lovibond colour scale value of sample.

The method one of described coupling is: with the color parameter of datumization Lovibond standard color chips coupling sample; Lightness, hue angle and chroma per sample selected datumization Lovibond color chips, successively approaches coupling, uses the stack of single datumization Lovibond color chips in its matching process, and after stack, the transmittance of color chips is according to τ (λ)=τ ₁(λ) τ ₂(λ) τ ₃(λ) ... τ _k(λ) calculate, the main line of coupling is that hue angle successively approaches, and takes into account lightness and chroma.

The method two of described coupling is: the method that adopts part retrieval successively to approach again; First large chromatic value color chips is combined, lightness, hue angle and chroma isochrome parameter after combination are become to database table; When after lightness, hue angle and the chroma isochrome gain of parameter of sample, in database table, carry out match selection, select a record best in database table, and then successively connect and approach coupling with little chromatic value color chips, then obtain the color value of best Lovibond colour scale.

The method three of described coupling is: adopt complete combination, being about to all Lovibond color chips combines, the color value and each combination lightness, hue angle and the chroma isochrome parameter that calculate the Lovibond colour scale of all each combinations, then grouping, forms multiple database grouping sheets; When after lightness, hue angle and the chroma isochrome gain of parameter of sample, in database table, carry out match selection, select a most consistent best record of lightness, hue angle and chroma isochrome parameter in database table, in this best record, the color value of Lovibond colour scale is the color value of sample.

Referring to Fig. 2, the process flow diagram of Lovibond colour scale spectrometer method for measuring color, the process of successively approaching coupling that described matching process one adopts can be carried out according to the flow scheme design of Fig. 2.During actual computation, can be according to actual ruuning situation adjustment, and not exclusive scheme; The part of described matching process two is retrieved in the scheme of successively approaching again, uses part flow process in Fig. 2.

Involved in the present invention is a kind of method of spectroscopy measurements color of Lovibond colour scale, by the spectral transmittance of measuring sample, under datumization light source condition, according to the calculating of color parameter in concerned countries standard, obtain relevant colors aspect technical data, mate with the datumization Lovibond color chips color parameter being stored in computing machine, obtain the color take Lovibond colour scale as result about sample.

In addition, aspect matching process, can adopt in theory the digitizing Lovibond standard color chips with color parameter is combined entirely, then calculate its lightness, chroma, hue angle, form searching database, as long as obtain lightness, chroma, the hue angle of sample, can mate simply, a certain array mode that provides datumization Lovibond standard color chips can obtain the Lovibond colour scale value of sample.

The method of the spectroscopy measurements color of Lovibond colour scale of the present invention, utilizes spectrometer under the light source condition of regulation, measures the spectral characteristic of sample, recycles intrinsic multiple Lovibond standard color chips spectral characteristics and carries out combinations matches, obtains its optimum matching.The Lovibond colour scale value that this best of breed multiple Lovibond standard color chips used form is the color value (Lovibond colour scale value) of institute's test sample product.

The present invention also proposes a kind ofly can guarantee accurately unified colour examining technical scheme of national value, and (1) can unify to stipulate the relative spectral power distribution function of light source, forms datumization light source, using this as standard sources.And actual measurement light source can be used a stabilized light source, as long as can measure exactly the transmittance of color chips or sample.(2) color chips in kind Lovibond can be become to datumization Lovibond standard color chips, standard ground forms the spectral characteristic transmittance function of standard, avoids the mismachining tolerance of colourity sheet in kind to cause colour examining error.The unification of these two aspects data makes spectrometer measurement Lovibond colour scale value have great advantage.

The table 1 composed as follows of Lovibond color chips, mates and has 1.28 × 10 according to full combination ¹⁰i.e. 12,800,000,000 records nearly of-1 combination, so googol need to spend larger time and space according to library searching, therefore should not adopt the mode of retrieval completely to mate, and should adopt the method for grouping, first judges group, and in grouping, enforcement is inquired about.

Table 1: the composition table of Lovibond color chips

Claims (7)

1. Lovibond colour scale spectrometer color measuring device, is characterized in that, as shown in Figure 1, the color measuring device of Lovibond colour scale spectrometer colour examining comprises light processor and calculation element (9); Described light processor comprises light source (1), convex lens, parallel beam (3), specimen holder (4), optical fiber daylighting head (6), beam Propagation optical fiber (7) and CCD spectrometer (8); Described convex lens comprise the first convex lens (2) and the second convex lens (5); The light that light source (1) sends, by becoming parallel beam (3) after the first convex lens (2), parallel beam (3) is through the standard colorimetric sheet in specimen holder (4) and specimen holder (4) or the colourity sheet of sample, enter after converging at a bit after the second convex lens (5) and gathered by optical fiber daylighting head (6), optical fiber daylighting head (6) inputs to CCD spectrometer (8) by the light signal gathering by beam Propagation optical fiber (7), CCD spectrometer (8), through light splitting and opto-electronic conversion, is passed to described calculation element (9) and is carried out colour examining calculating after processing.

2. Lovibond colour scale spectrometer color measuring device according to claim 1, is characterized in that, the spectral measurement ranges of described CCD spectrometer is [V _min, V _max], wherein V _minbe not more than 380nm, V _maxbe not less than 780nm, the resolution of spectrometer is not less than 2.5nm.

3. Lovibond colour scale spectrometer color measuring device according to claim 1, is characterized in that, described calculation element (9) can be computing machine or panel computer.

4. the method for measuring color of Lovibond colour scale spectrometer color measuring device according to claim 1, is characterized in that, comprises the steps:

Step 1: adopt the D65 light source that is equal to Lovibond tintmeter light source, its relative spectral power distribution S (λ) is carried out to datumization preservation, as datumization light source;

Step 2: select a stable light source (1) as work light, measure the relative spectral power distribution S of described light source (1) _w(λ);

Step 3: one of them the Lovibond standard colorimetric sheet in the multiple Lovibond standard colorimetric sheets that use as standard colorimetric sheet is placed in to specimen holder (4), measures relative spectral power and distribute

; Calculate the transmittance function of this Lovibond standard colorimetric sheet

Step 4: repeating step 3, obtains the transmittance function of each the Lovibond standard colorimetric sheet in multiple Lovibond standard colorimetric sheets wherein, k is the number of multiple Lovibond standard colorimetric sheets;

Step 5: obtaining after the transmittance function of each standard Lovibond colourity sheet of all standard Lovibond colourity sheets, one group of transmittance function to homochromy Lovibond colourity sheet carries out artificial correcting process, the regularity that the interval of its transmission ratio in each wavelength points is consistent with the interval of its standard value, then together with the standard value of corresponding colourity sheet, form datumization Lovibond colourity sheet, be stored in computing machine (9), for the calculating output of result;

Step 6: sample colourity sheet is placed in to specimen holder (4), measures relative spectral power and distribute

; Calculate the transmittance function of this sample

Step 7: the color parameters such as the lightness of calculation sample, chroma, hue angle, in order to coupling;

Step 8: according to the result of step 7, according to certain rule, select one or more datumization Lovibond colourity sheets to combine, lightness, chroma, the hue angle of the Lovibond colourity sheet after can calculation combination also carried out consistance with lightness, chroma, the hue angle of sample and mated, and the Lovibond colour scale value that best consistance is mated one group of datumization Lovibond colourity sheet representative used is the Lovibond colour scale value of sample.

5. Lovibond colour scale spectrometer method for measuring color according to claim 4, is characterized in that, in described step 8, the method for consistance coupling is: with the color parameter of datumization Lovibond standard color chips coupling sample; Lightness, hue angle and chroma per sample selected datumization Lovibond color chips, successively approaches coupling, and its matching process is used the stack of datumization Lovibond color chips, and after stack, the transmittance of color chips is according to τ (λ)=τ ₁(λ) τ ₂(λ) τ ₃(λ) ... τ _x(λ) calculate, the main line of coupling is that hue angle successively approaches, and takes into account lightness and chroma.

6. Lovibond colour scale spectrometer method for measuring color according to claim 4, is characterized in that, the method for described consistance coupling is: adopt part retrieval approaching method successively again; First large chromatic value color chips is combined, the look parameter after combination is become to database table; When after sample look gain of parameter, carry out match selection, select a best record, and then successively approach coupling with little chromatic value color chips, then obtain optimum value.

7. Lovibond colour scale spectrometer method for measuring color according to claim 4, it is characterized in that, the method of described consistance coupling is: adopt complete combination, the Lovibond color chips that is about to all datumizations combines, calculate color value and each combination lightness, hue angle and the chroma isochrome parameter of the Lovibond colour scale of all each combinations, then grouping, forms multiple database grouping sheets; When after lightness, hue angle and the chroma isochrome gain of parameter of sample, in database table, carry out match selection, select a most consistent best record of lightness, hue angle and chroma isochrome parameter in database table, in this best record, the color value of Lovibond colour scale is the color value of sample.

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