JPS62284228A - Spectrometric instrument - Google Patents

Abstract

PURPOSE:To permit the evaluation of a color with the optional spectral sensitivity set by a user by setting an optional coefft. for every wavelength by a coefft. setting means and calculating the addition value of the products of the coefft. set and the spectrometry value for every wavelength by a calculating means. for sum of products. CONSTITUTION:The user can set the optional weighting coefft. for every wavelength by the coefft. setting means US and the optional user spectral sensitivity can be defined by the set coefft. set. The addition value of the product of the spectrometry value and the coefft. set for every wavelength is calculated in a calculating means SIGMAM for sum of products. The sum of products calculated by the means SIGMAM is the value evaluated by the user spectral sensitivity with the spectrometry values.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention (Field of Industrial Application) The present invention calculates the sum of the products of the weighting coefficient for each wavelength arbitrarily set by the user and the spectral measurement value. It is related to a spectroscopic measurement device that can perform color measurement as well as, for example,
It is particularly suitable for uses such as photographic color density measurement and print color density measurement.

(Prior Art) Conventionally, spectrometers have been widely used that separate light from a sample into light of each wavelength and measure the light intensity of each of the separated wavelengths. In such a spectrometer, when evaluating the measured color, by calculating the product sum of the color matching function x k+ y l-+Σ of the CIE standard color system and the spectroscopic measurement value, Spectroscopic measurements are converted to tristimulus values.

(Problems to be Solved by the Invention) As mentioned above, when performing color evaluation using spectral measurement values, the number of color equivalence between the spectral measurement values and the CIE standard color system '5-
The sum of the products of the island V and the i-mata is calculated, but for example, when measuring the color density of a color photograph, another spectral sensitivity different from the color matching function is used. In addition, each industry and each user may want to evaluate color using their own spectral sensitivities. In such cases, if the user could set an arbitrary user spectral sensitivity and perform color evaluation based on the set spectral sensitivity,
It is considered convenient.

The present invention has been made based on such knowledge, and its purpose is to provide a spectrometer that can evaluate color with any spectral sensitivity set by the user.

<Means for Solving the Problems> In the spectrometer according to the present invention, in order to solve the above-mentioned problems, as shown in FIG. 1, an arbitrary coefficient ust( 1), usl(2>, ..., U
Coefficient setting means (LI
S), the spectroscopic measurement value R(i) and the above coefficient set u S 1
(i) and the added value of the product for each wavelength ΣU S 1 (i>・
and sum-of-product calculation means (ΣM) for calculating R).

In addition, in the combined invention, the sample (1) can be used as the illumination light source (2).
), and measures either the spectral reflectance or the spectral transmittance of the sample (1), using arbitrary coefficients US 1 (1), US 1 (2), etc. for each wavelength.
・, U S l (i), . 1
Addition value of product of each wavelength with (i> ΣP (i)・U S
1. Product-sum calculation means (ΣM) for calculating (i)・R(1)
It has the following.

Note that, if necessary, the coefficient setting means (US)
．． The third coefficient set U S 2 (i>, U S 3 (i
), and the sum of products calculation means (ΣM) may be configured to be able to calculate the sum of products for these coefficient sets as well.

(Function) In the present invention, the user can set an arbitrary weighting coefficient US 1 (i) for each wavelength using the coefficient setting means (US), and by this set coefficient set, ,
Any user can define spectral sensitivity. The sum-of-products calculation means (ΣM) calculates the sum value ΣU S of the product of the spectral measurement value R(i) and the coefficient set U S 1(i) for each wavelength.
1 Calculate (i)・R(i). Sum of products calculation means (ΣM
) is a value obtained by evaluating the spectral measurement value R(i) using the user's spectral sensitivity. Note that the present invention can be used not only for evaluating object colors but also for evaluating light source colors.

Next, the combined invention describes the sample under an arbitrary illumination light source (2) (
It is used when measuring the object color in 1).
In the product-sum calculation means (ΣM), when calculating the sum of the products of the spectral measurement value R(1) and the coefficient set US 1 (i>) for each wavelength, the spectral distribution P of the light source used for color evaluation calculation is calculated. (
i) is also multiplied by each wavelength 1jj. Therefore, the sum of products calculated by the sum of products calculating means (ΣM) is based on sample (1), taking into account the spectral distribution of the light source used for color evaluation calculation.
This is the value obtained by evaluating the reflected or transmitted color of the image using the user's spectral sensitivity.

(Example) Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a block diagram of one embodiment of the present invention. Second
In the figure, S 1 and S 2 are spectroscopic sensors that decompose incident light into light of each wavelength and output a photocurrent proportional to the light intensity of each wavelength in parallel. It is composed of silicon photodiode arrays PDA1 and PDA2. PDAI, P
DA2 is a silicon photodiode array in which silicon photodiodes each weighing 40 g are arranged in a straight line. Silicon photodiode array PDAl, PDA
2 each have a bandpass filter array F 1
, F2 are arranged in the optical path.

The bandpass filter arrays Fl and F2 are arrays in which a large number of optical bandpass filters having different transmission wavelengths are linearly arranged so that the transmission wavelengths continuously change from the short wavelength side to the long wavelength side. The light is passed through the bandpass filter arrays Fl and F2 to the silicon photodiode array PDAI.

By entering the PDA 2, the wavelength of the light detected by each photodiode in the photodiode array is
The wavelength changes continuously from short to long wavelength.

A portion of the light emitted from the pulsed xenon lamp (2) by the illumination circuit (3) is incident on S2, which is a spectral sensor for measuring the light source, in order to measure variations in the spectral energy distribution of the light source, and the remaining portion is incident on S2, which is a spectral sensor for measuring the light source. illuminates the measurement sample (1). The reflected light from the measurement sample (1) is incident on Sl, which is a spectroscopic sensor for sample measurement. Sensor 31. S
A photocurrent proportional to the energy of each wavelength of light incident on the sensor S1. It is output from each silicon photodiode of S2. The photocurrent from each silicon photodiode of PDAI and PDA2 is input to the photometry circuit (4), where it is integrated and A/D converted for each silicon photodiode, and its value is transmitted through the turnout board (5). , is input to the control/calculation section (6). Lighting circuit (3)
is connected to the control/calculation unit (6) via the input/output board (5).
controlled by Photometric circuit section (4) and lighting circuit (
The detailed configuration and operation of 3) will be described later.

The control/calculation unit (6) is a central processing unit fi (CPU) that controls and calculates the entire system.
6) includes a program storage section (7) which is a read-only memory (ROM) that stores programs executed by the control/calculation section (6), and a random access memory (RAM) which stores calculation data, system status, etc. ), and a spectral sensor data storage unit (9) which is an electrically erasable programmable read-only memory (EEPROM) that stores detection wavelengths and various correction constants of the spectral sensors St and S2, External input/output ports (10) for inputting and outputting data with external devices such as external personal computers, and magnetic storage devices (10) such as floppy disk drives and hard disk drives.
12), a display control unit (13) that controls the display unit 14) consisting of a liquid crystal or CRT, a keyboard (15), a printer (16), and a clock that measures the current time. A real-time clock (17) is connected to the control/calculation unit (6).
) controlled by

3, 4 and 5 are circuit diagrams of the photometry circuit section (4), FIGS. 6 and 8 are timing charts of photometry, and FIG. 9 is a flowchart of the photometry control program. First, Figure 3 shows a silicon photodiode array PDAI.
, a current-voltage conversion circuit and an integration circuit connected to any one silicon photodiode PDi in PDA2. Sisocon photodiode array PD
The circuit shown in FIG. 3 is connected to each of the silicon photodiodes of A1 and PDA2. In No. 3121, 0P1i is an operational amplifier, and a feedback resistor Rfi is connected between the inverting input terminal and the output terminal. The non-inverting input of operational amplifier 0P1i is connected to ground. The anode of the silicon photodiode PDi is connected to the inverting input terminal of the operational amplifier OP Li, and the cathode of PDi is connected to ground. The output terminal of the operational amplifier 0PLi is connected to the integrating resistor Re.
i, and the other end of the integrating resistor Rci is connected to the input terminal of the analog switch S W 1 i. The output terminal of the analog switch SW 1 i is connected to the inverting input terminal of the operational amplifier 0P2i. A control terminal of the analog switch S W 1 i is connected to an integral control signal C)IG, which will be described later. An integral capacitor Cci and an integral reset analog switch S W 2 i are connected in parallel between the inverting input terminal and the output terminal of the operational amplifier 0P2i. A control signal of the analog switch SW 2 i is connected to a signal RES, which will be described later. Further, the inverting input terminal of the operational amplifier 0P2i is connected to the input of the discharging analog switch SW 4 i, and the analog switch S
The output of W 4 i is connected to one end of a discharge resistor Rpi, and the other end of the resistor Rpi is connected to 5V. For convenience, the control signal of the analog switch SW 4 i will be named ADi. The non-inverting input of the operational amplifier 0P2i is connected to ground, and the output terminal is connected to the input terminal of the analog switch SW 3 i.

For convenience, the output terminal of the analog switch SW3i is
I'll name it Ol. Analog switch SW
3i control signal is analog switch 5W4i
It is connected to the ADi signal, which is the control signal for the ADi signal. l! ! For convenience, the above circuits are collectively named AN(i).

FIG. 6 is a timing chart illustrating the operation of the circuit of FIG. 3. The operation of the circuit shown in FIG. 3 will be explained below using the timing chart shown in FIG. 6. At time t1, the RES signal becomes Low-level, the CHG signal becomes High level, and the analog switch SW2i is turned off.
The analog switch SW 1 i is turned on. At the same time, or a little later, the lighting circuit (3)
A pulsed xenon lamp (2) emits light, which passes through a bandpass filter array F1 or F2 and enters a silicon photodiode PDi. When light enters the silicon photodiode PDi, a photocurrent 11i proportional to the intensity of the incident light flows from the anode of the PDi toward the inverting input terminal of the operational amplifier OP 1 i, and almost all of it flows to the feedback resistor Rfi. The output voltage V 1 i of the operational amplifier OP 1 i is expressed by the following formula.

V1i=-11i-Rfi...■Currently, the analog switch SW1i is ON and 5W21 is OFF, so it is connected to the operational amplifier 0P1i through the integrating resistor Rci.
A current I2i expressed by the following equation flows from the output terminal of ?to the integrating capacitor Cci.

The output voltage 21 of the integrating operational amplifier 0P2i is obtained by time-integrating I2i as shown in the following equation.

Therefore, V 2 i is the silicon photodiode PDi
The voltage is proportional to the time-integrated value of the intensity of the light incident on it. At time t2 after the pulse xenon lamp (2) finishes emitting light, the CHG signal becomes Low, and the analog switch S W 1 i is turned off. At this point, the output voltage V 2 i of the integrating operational amplifier 0P2i is held. Thereafter, at time t3, the ADi signal becomes High, and the analog switches 5W4i and 5W3I are turned on. The charge stored in the integrating capacitor Cei is transferred through the analog switch SW4i and the discharging resistor RDi.
(2) It is discharged with a constant current 13i expressed by the following formula.

Therefore, the output voltage 21 of the integrating operational amplifier 0P2i decreases linearly.The operation of the signal 01 and the operations at subsequent times will be described later.

FIG. 4 is a circuit diagram showing one block (first block) in the photometric circuit. Silicon photodiode array P
DA1. In this embodiment, a total of 80 silicon photodiodes in the PDA 2 are divided into 8 blocks of 10 blocks each, so that the silicon photodiodes included in one block are divided into 10 consecutive blocks. As shown in FIG. 4, the first block (k=o, 1..., 7
>10 silicon photodiodes PDj~P
The anodes of Dj+5 (J=k
9>. All candes of silicon photodiodes are connected to one circuit AN (
The outputs ○j to Oj+s of the analog switches 5W3j to 5W3j+s in j) to A N (j+9) are all connected to the non-inverting input of the comparator CMPk. The non-inverting input of comparator CMPk is connected to +5V via resistor R1k. The inverting input of comparator CM Pk is connected to a negative reference voltage -VB. Let Ck be the output of comparator CMPk.

ADj~ADj+s are respectively circuits A N (j)~
Analog switch 5W4j~5W in AN(j+9)
This is a control signal for Jj, 5W3j to 5W3j+*.

For convenience, the circuit block in Fig. 4 is referred to as BLOCK(k)(k
=0.1,2. ..., 7).

FIG. 5 is a circuit diagram of the entire photometric circuit of this embodiment. Fl
, F2 is the bandpass filter array, and PD
AI and PDA2 are the silicon photodiode arrays. The silicon photodiodes in PDAl and PDA2 are divided into 4 blocks of 10 each, that is, P
DAI and PDA2 are divided into 8 blocks, each of which is a circuit block BLOCK (0) explained in Fig. 4.
- Connected to BLOCK (7). The cathodes of all silicon photodiodes are connected to ground.

ICI is a 4-person decoder with 16 outputs. IC1 [
The input terminal is an enable terminal, and when [ is High, all outputs of Q0 to Qls are set to os. H
When is Low, one of the outputs Q0 to Qls becomes High, and the others become Low+w, depending on the 4-bit signal input to the A, B, C, and D input terminals.

In this embodiment, Q1o to Qls are not used, so the A, B, C, D, and E inputs and Q
, ~Q relationships are shown in Table 1.

(Margin below) Table 1 However, in the above table, H: High level L: Low level ×: H or L As a device that realizes this function, for example, CMO3-I
There is 4514 of C.

The output Q0 of IC1 is A Do , A D + . ,
AD2゜, AD,. ,AD,. , A.D.s. , A
Da. , A D t. and the output Q1 is
A D l, A D + +, A D 21,
A D 31 , A D 4 + .

A D s + , A D s 1. AD, 1
and the output Q2 is connected to A D z , A D +
2, AD22, AD3x, A
D42, ADs2, ADsz, AD
The output Q3 is connected to A D3. A D1 co・AD2 co・AD3 co・AD, co, A D 5 co, AD
, Co-AD is connected to Fuco, and the output Q is A D 4
, A D l 4 , A D 21 .

A D s a , A D 14 , A D 54
, A D a4 , A D? , and the output Q is A D s , A D ls , A D
2s, AD3s, AD4S
.

A D is, A D 65. It is connected to A D t5, and the output Q6 is A D s , A D + s ,
AD 21 , AD ys , AD 4
s, AD s i, AD i s, A
is connected to D t a, and the output Q is A D q ,
A D+7. AD2F, AD Tips, AD4F, AD
5, A D @t・AD is connected to output Q
, is A D , A D + s , A D 2
s.

A D 3 s , A D t s , A D s
s, A D s a , A D t s, and the output Q is A D Q, A D +s, A D
zs, A D 3! , A D , s.

A D , s , A D s * , A D ?
! is connected to.

Also, all circuit pro/re BLOCK (0) ~ BLO
Comparator outputs CO to C7 in CK(7) are input to IC2, which is an 8-manpower NOR gate. In addition, each comparator output CO, C1, C2) C3, C4, C5
, C6, and C7 are respectively two-man AND gates I
C4, IC5, IC6, IC7, IC8, IC9, IC
10, connected to one input of IC11, IC4, IC
5, IC6, IC7゜IC8, IC9, IC10, IC
The other input of 11 is all 2-man power NOR gate I.
Connected to the output of C3. IC12, ICl3. I
C14°ICl3. IC16, IC17, ICl3. I
C19 is a 16-bit counter, and the count value is cleared to 0 at the rising edge of the CLR input.
The count value is incremented by 1 at the rising edge of the K large input. OSC is an oscillator for outputting a reference clock for A/D conversion. The output of the OSC is connected to one input of a two-way NOR gate IC3. Ideku capo-1
-(5) was mentioned when explaining the second UA, and the signals RES and C) mentioned later when explaining FIG.
(G is the output of the input/output port (5). Decoder I
The E, A, B, C, and D inputs of CI are the outputs of the input/output port (5). The output of the 8-power NOR gate IC2 is input to the ADE input of the input/output board (5). The CLR output of the input/output board (5) is the counter IC12゜ICl3.
．． IC14, ICl3. IC16,I (47°ICl3
．． Connected to the CLR input of IC19. The output of the input/output board (5) is connected to one input of the two-man powered NOR gate IC3. Since the output of the oscillator O8C is input to the other input of the two-man power NOR gate IC3, the output of the two-man power NOR gate IC3 is "
When the signal is Low, an inverted signal of the output of the oscillator oSC is output, and when the H signal is High, it is always Low.

Counter IC12, ICl3. IC14, ICl3゜I
C16, IC17, ICl3. Output CTo of IC19,
CTI, CT2. CT3. CT4. CT5. CT6,C
T7 is input to the input/output port (5).

FIG. 7 is a block diagram for explaining the lighting circuit (3). In Fig. 7, the numbers <2), (3), and (5> correspond to those in Fig. 2. (35) is a power supply for the lighting circuit, and is a low voltage DC power supply of about 9V. (3
1) is a booster circuit that uses blocking oscillation, and supplies power to charge the main capacitor (37) for accumulating charges for pulsed xenon lamp light emission. (32) is a voltage control circuit; Main capacitor (
37) When the charging voltage is detected and the charging voltage becomes higher than the predetermined maximum voltage, the FCHG1 output is set to Low level,
When the charging voltage of the main capacitor (37) becomes lower than a predetermined minimum voltage lower than the maximum voltage, FCHGI
This is a voltage detection circuit with hysteresis in which the output is set to a high level, and when the charging voltage is between the maximum voltage and the minimum voltage, the FCHGI output maintains the state up to that point.

The boost circuit (31) receives the FCHGI signal from the voltage control circuit (32) and the boost control signal FCHG2 from the input/output port (5). F CHG 2 signal is
This is an output from the input/output board (5) and is a signal used by the CPU (6) to control the power supply from the booster circuit (31) via the input/output board (5). The booster circuit (31
) inputs the FCHG1 signal and FCHG2 signal,
Power is supplied only when both signals are at Higb level. (36) is a diode that prevents current from flowing backwards from the main capacitor (37) to the booster circuit (31). Therefore, the input/output board (FC from (5))
While the lG2 output is at High level, the voltage control circuit (32
) The booster circuit (31) is controlled by the output FCHGI from the main capacitor (37), and the charging voltage of the main capacitor (37) is controlled to be between the maximum level and the minimum level.

<33) is the charging voltage of the main capacitor (37),
Compare the minimum voltage with a predetermined charging completion voltage that is the same as or lower than the minimum voltage, and if the charging voltage is higher, the VCHK output signal is set to High, and if the charging voltage is lower, the VCHK output signal is set. Set to Low. However, the maximum voltage, minimum voltage, and charging completion voltage are set higher than the voltage at which the pulsed xenon lamp 2) can emit light. The V CHK signal from the voltage detection circuit (33) is input to the input/output board (5), and is input to the CPU (6).
) determines whether the lighting circuit (3) is in a state where it can emit light by inputting the VCHK signal through the input/output port (5). (34) is a pulsed xenon lamp (
2) is a light emitting circuit 1 to a trigger circuit for emitting light;
The pulse xenon lamp (2) is made to emit light at the rising edge of the FLASH signal from the input/output boat (5). C
PU (6) connects F'LASH via input/output port (5)
By controlling the signal, the light emission timing of the lighting circuit (3) is controlled.

FIG. 8 is a timing chart showing the photometry timing of this embodiment, and FIG. 9(a)<1+>(c)(d) shows C
FIG. 2 is a flowchart illustrating the control of the photometric circuit unit (4) by P U (6) and the calculation procedure for calculating a measured value. FIG. The photometry operation will be described below with reference to the timing chart of FIG. 8 and the flowchart of FIG. 9. Figure 9(a)
In #1, CPLI (6) is the input/output port (5)
Charging completion signal V CHK from the lighting circuit (3)
is input, and it is determined whether the lighting circuit (3) is capable of emitting light by determining whether VCHK is High and the bell is on. If VCHK is Low, the preparation for emitting light is not completed, so the process proceeds to #2, sets the error flag ERRF to 1, and returns.

If VCHK is Higb, it is possible to emit light, so proceed to #3.
Set the boost control signal FCHG2 to Low. When FCHG2 becomes Low, the booster circuit (31) stops supplying power, but it takes about 100 microseconds to completely stop, so we wait in step #4. The reason for stopping the power supply to 31) is that the booster circuit (31) oscillates at a high voltage while supplying power, which becomes a source of noise that is harmful to the photometry circuit (4). be.

Next, the CPU (6) proceeds to #5, sets the RES signal to Low, and sets the CHG signal to Higl+ to start the integration operation. Immediately after that, in step #6, set the FLASH signal to Hi.
gh and make the pulse xenon lamp (2) emit light.

As mentioned above, part of the light emitted from the pulsed xenon lamp (2) enters the light source measurement spectral sensor S2, and the remaining part is irradiated onto the measurement sample (1).
The reflected light from 1) is irradiated onto the sample measurement spectroscopic sensor S1. The light incident on the spectroscopic sensors SL and S2 is spectrally separated by bandpass filter arrays Fl and F2, respectively, and is then separated by a silicon photodiode array PDAI.

The light enters the PDA 2, and the silicon photodiodes in the PDAI and PDA 2 each output a photocurrent proportional to the intensity of the separated light. The photocurrent from each silicon photodiode is converted into a voltage according to the equation 0 and integrated according to the equation (2), as described in the explanation of the timing chart in FIG. Therefore, the output voltage of the integrating circuit is
2° to ■27 increases in the positive direction as shown in FIG.

The CPU (6) waits for the time until the light emission ends in step #7 (3 m5ec in this example), and then
In step 8, the CHG signal is set to Low to end the integration operation. In this state, the integral output voltage V 2 o ~ ■27
, holds a voltage proportional to the time-integrated value of the intensity of light incident on each silicon photodiode. At this time,
The FLASH signal is also returned to Low level in preparation for the next light emission.

Next, the CPU (6) proceeds to #9, where it sets the variable N to 0. The variable N is A of the decoder ICI in Fig. 5,
This is the value output to the B', C, and D inputs through the input/output port (5). When the variable N is expressed in binary, the 0th bit is A, the 1st bit is B, and the 2nd bit is C13. The bit corresponds to D.

Next, in #10, the CLR output of the input/output boat (5) is set to I(i
gl+, and counters IC12, ICl3. IC14°ICl3. IC16, IC17, ICl3. Clear the count value of IC19 to 0. Next, in #11, change the value of variable N to 0 from the input/output port (6) to A of ICI.

In step #12, the CLR signal is returned to Low, and the H signal is made Low.

Now, since A, B, C, and D inputs are all Low, Q as shown in Table 1. The signal becomes Higl+ and ADi(i
= 0.10, 20.30, 40, 50, 60.70) becomes Hlgll, and analog switch SW3 i, SW
41 (i=0.10, 20..., 60.70) has poor continuity. Therefore, as mentioned above, the integrated output voltage ■2i (i-0, 10, 20, ..., 60.70>
decreases linearly, at this time, the comparator CMP
O, CMP1. CMP2. CMP3. CMP4. CMP
5. CMP6. The non-inverting inputs of CMP7 are analog switches SW3o, SW316,
S W 3 z. , SW3. . , SW3. . , SW3.
. , S W 3 g. , through SW3.0, V 2
o, V 2 +o, V 220. V 2 *o, V
2 +. ,■2. . , ■26°, and ■27°. Now, to explain by focusing on the voltage of V2o, V2° is the voltage of analog switch SW3. Comparator commercial through
゛Connected to the non-inverting input of PO. As aforementioned,
The output of V 2 o decreases linearly, but from the reference voltage -■8 of the inverting input terminal of the comparator CMP, V
If 2° is higher, comparator CMP (1) output CO is High.7. ), CO double signal, two-man AND
It is connected to one input of gate IC4, and the other input of IC4 is connected to the output of oscillator O8C and the NO signal
Since R is input, the signal represented by the logical formula (2) is input to the clock input terminal CKO of the counter IC12.

CKO=(O3C+E)・C0=O3C−E, CO・・
・■ Therefore, a clock pulse signal is input to the clock input CKO of the counter IC 12 only when the comparator output CO is High and the output signal is LO-.

At #12, the [signal becomes Low, and the comparator output CO is currently Highb, so the counter IC 12 is counting tarok pulses.As one hour passes, the voltage of V2° decreases linearly, and the voltage of V2° decreases linearly, and the voltage of ■When it becomes lower than B, the comparator output CO changes from Higb to L.
Switch to o-. When CO becomes Low, the clock pulse signal is no longer input to the clock CKO according to equation (2), and the counter I Cj2 stops counting.

Therefore, the count 1 shift CTO of the counter IC12 is a value proportional to the time from when the mouth signal becomes Lo- until when CO becomes LoIll, that is, (V2°
The value is proportional to the voltage value. In this way, the integral value of the photocurrent of the silicon photodiode PDO is A/D converted. V2+o.

V2za, V2 ko, V2+o, V2so, V2s
The voltages of V2to and V2to are also A/D converted in the same manner as above, and the voltages of the counters ICl3. IC14, ICl3. IC16
, IC17, ICl3. The count value CTk of IC19 is a value expressed by the following formula.

CTk=C+(V2j+V days)...■(However, C3 is a proportionality constant) k=0.1, 2. ..., 7 j=kX 10 As mentioned above, all comparators CMPO to CM
The outputs CO to C7 of P7 are each connected to one input of the 8-power NOR gate IC2, and the output A of IC2
DE is only when the comparator outputs CO to C7 are all Low- (igl+, otherwise it is Low. The fact that the comparator outputs CO to C7 are all Low means that V2o, V2+a, V2za, V2z
o, V2+o, V2so, V2s. , v21° A/D
This means that all conversions have been completed.

In step #13, CP(J(6) inputs the ADE signal from the input/output port (5) and checks whether it is High. If the ADE signal is not High, the High
Repeat the input and check of the ADE signal until it becomes +.
When the AD'E signal becomes Hight-, the process proceeds to #14, which makes the entrance signal High. When the 0-mouth signal becomes HighI+, the outputs Q0 to Q9 of the decoder IC1 all become Loa+, and the analog switches SW4i, SW31(i =0.1
0, 20, 30, 40, 50, 60.70) is turned OFF, and the integral output V2i (i=o, 10, 20, 30.4
0, 50, 60.70), the linear decrease stops and the voltage is held at that point. Also, comparator C
The non-inverting input of MPk (k=o, 1, 2..., 7) becomes High by the pull-up resistor R1k, and the comparator output Ck becomes High, but when the mouth signal is High
Since it is l+, counting by the counters IC12 to IC19 is not performed according to formula (2), and the count value at that time is held.

Next, the CPU (6) inputs the counters IC12 to ICL9 directly through the input/output port (5) at #15.
CTI, CT2. ..., Cr2 are input, and array variables CM 1 (N) and CM 1 (N+10>) are input, respectively.

CMI(N+20),..., CMI(N+70>).Currently, N is 0, so CMI(0), CMl
(10), CM l (20>, ・ ・ , CM 1
(70), that is, the A/D conversion value of ■2I is CM
1 (i>(i=0.10, 20..., 70)) Next, increase N by 1 in #16, determine whether N is 10, and If not #
Return to 10. When executing from #10 to #15, in the same way as when N-〇, since N=1 this time, the integral output V2
+, V2'z, V221. V2j+, V2++, V2s
+, V2i+, V27□ are A/D converted and array variable C
Ml(1), CMl(11), CMl(21), CMH
31), CMI (41), CMI (51), CMH61
).

Stored in CMI (71). Add 1 to N in #16, and then repeat #10 to #17 until N becomes 10.
All integral outputs V 2 i are A/D converted and CM
1 (i). The relationship between y2; and CM 1 (i) can be expressed by equation 0.

CM 1 (i) = C + (V2i + V mouth) ・
... ■When it is determined that N has become 10 in #17,
Since A/D conversion of all integral outputs has been completed, set RES to Higl+ in #18 and connect it in parallel to integral capacitor Cci (i-0, 1, 2, ..., 79). The analog switch S W 2 i is turned on, and the charge on the integrating capacitor Cci is set to 0.

Furthermore, 0 is output to A, B, C, and D to return them to the initial state.

Next, the process proceeds to #19 in FIG. 9(b), and dark offset measurement begins. The measurement of dark offset is carried out by emitting light from the pulsed xenon lamp (2) described above.#
It is almost the same as #5 to #18, except that the pulse xenon lamp (2) does not emit light, and #31 after the measurement is completed.
In the step, the boost control signal FCHG2 is set to High,
The only difference is that the booster circuit (31) restarts power supply, so a timing chart is omitted. In #19 to #21, the integral output V2i (i=0.1, 2.
....

7) are obtained, and all integral outputs from #22 to #31 are A.
/D conversion and stored in array variables OF(i). This value of OF (i) is a value that includes all effects such as the offset of the operational amplifier, the influence of external light, the dark current of the silicon photodiode, and the leakage f and 'a of the analog switch. By subtracting this OF (i) from C M 1 (i>, which is the measured value when the lamp (2) is turned on, we can calculate the offset, the dark current of the silicon photodiode, the leakage current of the analog switch, and the influence of external light. It is possible to cancel errors caused by, etc.

Furthermore, since this embodiment uses a pulsed xenon lamp (2) as the light source, it is possible to measure the dark offset without chopping the light, unlike when using steady light as the light source. It has the advantage of not requiring any mechanical driving parts.

In steps #32 to #35 of FIG. 9(c), the above-mentioned dark offset correction is performed. In other words, the CMI is the value measured by emitting light from the pulse xenon lamp (2).
The value obtained by subtracting the dark offset measurement value OF (i) from (i) is stored in CM 1 (i>).

From #36, we will calculate the spectral sensitivity correction.Here, we will explain the meaning and principle of the spectral sensitivity correction.
Figure (a) shows the photocurrent 11i of each silicon photodiode in the spectroscopic sensor S1 used in this example, and the current-voltage conversion/integration circuit AN(i) (i=0.L, 2...
..., 39) is multiplied by the amplification factor, and the spectral sensitivity Si(λ) as a photometric circuit system is i=0.1, 2.・ ・ , 3
), where λ is the wavelength of light. Spectral sensor-SiS2 bandpass filter array F1. F2 is treated with infrared rays and ultraviolet rays, and S
The values of O(λ) to 539(λ) are approximately zero in the wavelength range shorter than 370n+* and in the wavelength El range longer than 720nm.

SO<λ) to 539(λ) are arranged at a pitch of approximately 10 nm, and the half width of the bandpass is wider than that within 10 nm. In addition, due to the effects of internal reflection between the bandpass filter array and photodiode array, there is sensitivity in a wavelength region far away from the peak wavelength, and this is called spectral sensitivity 0. The calculation of 0 spectral sensitivity correction, which causes an error in the measured value due to the spectral sensitivity tailing and wide half-width, is correct based on the output of a sensor that has spectral sensitivity with skirting and wide half-width. It is used to obtain measured values.

Now, the spectral sensitivity Si(λ)(i=0.1.2...,3
PKi (i=o, l, 2..)
, 39). Then, the measurement wavelength range (in this example, 3
70 to 720 nm) is divided into 40 regions Δλ1 (i=o, l.

2)・・139). Now, spectral sensor S1
The spectral distribution of the incident light is approximated to be flat within one wavelength region divided into 40 as shown in FIG. 10(b), and the light intensity at λ1 in the wavelength region is set as Pi. At this time, if the output of one sensor having a spectral sensitivity of Si (λ) is 0i (i=0.1°2)..., 39), Ol is expressed by the following equation.

PKo+PK.

Now, alj is defined as follows.

2 (j・1...., 38)
When defined in this way, equation 0 can be expressed as the following equation.

0i= Mustard Pj・a i j ...[Stock]j・
0 Since the above formula holds true for i-0 to 3, the following formula holds true using a matrix.

(However, n=39) ...■ The above equation is expressed as follows.

O=8・P...@ However, from formula 0, P=Δ-10...0 Here, Δ-1 is the inverse matrix to the matrix. Therefore,
If Δ−“ is known, the spectral energy distribution P of the incident light can be determined from the value of output 0 of the spectroscopic sensor S1 using equation (2). What is necessary is to measure the spectral sensitivity SO(λ) to 539(λ), obtain the matrix Δ=(aij) according to the formula 0, and calculate the inverse matrix mu−1 of Δ.

Although the spectroscopic sensor S1 for sample measurement has been described above for convenience, the same applies to the spectroscopic sensor S2 for light source measurement. Here, the spectral energy distribution of the incident light was approximated to be flat within the wavelength range Δλi, but this example is for measuring the spectral reflectance of a reflective object, such as paint or printed matter. Since the spectral reflectance of reflective objects generally follows a gentle curve and has no steep absorption, it can be approximated in this way.

Here, an explanation will be given again according to the flowchart of FIG. 9(e). Spectroscopic sensor for sample measurement (sample sensor > Δ-1 in the 0 formula for SL is B = (BiD
Then, 8-1 in equation 0 for light source measurement spectral sensor (reference sensor) S2 is expressed as B'=(B″iD
shall be. In #36 to #39, spectral sensitivity correction calculations shown in equation 0 are performed for the sample measurement spectral sensor S1. In #40 to #43, the spectral sensitivity correction calculation shown in equation 0 is performed for the light source measurement spectral sensor S2. Equation 0 is as follows for the spectroscopic sensor S1.

Pi = Σ Bij-Oi ... [phase]
j=0 Now, the output of the spectroscopic sensor S1 is 0i (i-0, 1, 2°・
..., 3) are stored in c M 1 (i), and if we decide to store them in PieCM2 (i) calculated using the formula 0, then CM 2 (i) = Σ Bij - CMI (j )
...■j=.

(n=o, 1, 2..., 39), and formula 0 is as follows for the spectroscopic sensor S2.

Now, the output of the spectroscopic sensor S2 is CMI (i + 40) (i
=o, 1, 2. ... , 39), and if we decide to store P; calculated using the [phase] formula in CM2 (i+40>), it becomes Q (i=0.1, 2... , 39) , Incidentally, the values of BIj and B'ij are stored in advance in the spectroscopic sensor data storage section (9).

Next, the process proceeds to #44 in FIG. 9(d), where light source correction calculations are performed. The illumination light source of this embodiment is a pulsed xenon lamp lamp 2), and its spectral energy distribution varies slightly each time it emits light. Since the light source measurement spectral sensor S2 measures the spectral energy distribution of the pulsed xenon lamp (2) at almost the same wavelength as the sample measurement spectral sensor S1,
By dividing the spectral energy distribution of the sample light measured by the spectral sensor S1 by the spectral energy distribution of the light source measured by the spectral sensor S2 for each corresponding wavelength, and using that value as the measurement value, the spectral energy distribution of the light source is calculated. Errors due to fluctuations in energy distribution can be eliminated. #44
The calculation is performed from #47. CM2 with #45
(1) is the measurement value corresponding to the first silicon photodiode of the spectroscopic sensor S1, and CM2(I +40
) is the measured value corresponding to the first silicon photodiode of the spectroscopic sensor S2. CM2(I) to CM2(
The value divided by 1+40) is stored in CM3(I). This is repeated until I=O to 39, and all measured values are corrected for the light source and stored in CM3(I). This completes the correction of the variation in the spectral energy distribution of the illumination light source, and the corrected values are stored in CM 3 (i>(i=O~3).

Next, the process proceeds to #48, where wavelength correction calculations are performed.

Here, we will explain the meaning of the calculation of wavelength correction.6 The spectroscopic sensors SL and S2 of this embodiment use a bandpass filter array, and the peak wavelengths are approximately 1Qna apart, but due to errors during the manufacturing of the filters. Therefore, there is some variation in wavelength pitch.

This variation in wavelength pitch was calculated by linear interpolation to
The wavelength correction calculation described here is to correct the value to +s+pitch.

At #48 in FIG. 9(d), the wavelength number J is first set to zero. The wavelength number J is a number assigned to a wavelength at Ionm intervals within the wavelength range from 400ns to 70OnI+1,
400 When n+a, J=O, 1 for every 10nw+ increase
This is a number that increases by ■ is the sensor number, #4
Initialize to zero with 9. However, ■-〇 is the number of the sensor whose peak wavelength is the shortest, and I increases by 1 toward the longer wavelength side. In #50, the wavelength W corresponding to the wavelength number J is calculated. In #51, compare the peak wavelength PK(I) of the first sensor with the J#th wavelength W, and if PK(I)<W, increase the value by 1 in #52 and return to #51. . If PK(I)≧W, proceed to #53, that is, #51. In #52, the number of the sensor having the peak wavelength equal to or greater than the fifth wavelength W and closest to W is searched. In #53 to #55, Wl, W2. shown in FIG. Calculate the value of M. What is wi #51
．． It is the difference between the peak wavelength PK (1) of the sensor whose peak wavelength is greater than or equal to W found in #52 and is closest to W, and the peak wavelength PK (I-1>) of the sensor one wavelength shorter than that, W2 is the difference between W and PK(I-1).M is the difference between the measured value CM3(I) of the first sensor and the measured value CM3(I-1) of the (I-1)th sensor. It's the difference.

In #56, the measured value at wavelength W is transferred to the first sensor (
1-1) Obtain by linear interpolation calculation from the measured value of the th sensor, and let the value be MEAS (J),
In #57, the wavelength number J is increased by 1, and in #58 it is increased to 4.
In order to determine whether or not the range from 00 nm to 1700 ■Im has been completed, J determines whether 31 or not. Obtain by calculation.

If J becomes 31, all the measured values of the Lone interval in the range of 400 nm to 7ooIII+ have been obtained by interpolation calculation, so proceed to #59, end the photometry subroutine, and return. In order to make the explanation easier to understand, we have provided the processing from #49 to #54, but the sensor number, ffi, W2, etc. corresponding to the wavelength W are calculated in advance and stored in the spectral sensor data storage section (9). In that case, #49.
#51. #52゜#53. #54 can be omitted.

The photometric circuit operation and correction calculation process of this embodiment have been explained above.Next, the functions and operations of the entire system will be explained according to the flowcharts starting from FIG. , 1212th
Proceed to step #100 in (a) and input/output board (5
), external input/output board 10), magnetic storage control unit (11)
), display control section (13), keyboard (15), and printer (16) are initialized.Next, the process proceeds to step #101, where the memory and setting data in the data storage section (8) are initialized.

Next, run the blue routine displayed in step #102,
The blue routine that displays 0 in step #103 to determine whether or not a key is pressed will be described in detail later. If the key is pressed, the process advances to #105 in FIG. 12(b); if the key is not pressed, the current time is input from the real-time clock (17) in #104, the value is displayed, and 1
Return to 03 0 FIG. 26 shows an example of the arrangement of the keyboard (15) used in this embodiment.

In #105 of the 11th [F(b), it is determined whether the key being pressed is the "'M E N U" key, and if so, a setting subroutine that performs settings-related processing is executed in step #125. and return to #102.

If the key is not "MENU", proceed to #106, determine whether the key is "'CAL", and if so, #
At step 126, a calibration subroutine is executed to perform processing related to calibration using the standard reflector, and the process returns to #102.

If the key is not "'CAL'", proceed to #107, determine whether the key is "MEAS" or not by P1, and if so, #1
In step 27, a measurement subroutine for processing related to measurement is executed, and the process returns to step 103. However, the measurement subroutine is different from the photometry subroutine mentioned above.
More details later. If the key is not "MEAS", the process proceeds to #108, where it is determined whether the key is '5TAT', and if so, the process proceeds to #128, where a statistical subroutine is executed to perform processing related to statistical calculation of measured values. , #102
Return to If the key is not ``5TAT'', proceed to #109, determine whether the key is ``DATA'',
If so, the process advances to #129 and executes a data number setting subroutine for setting the data number of the measured data to be displayed, and returns to #103. The key is “
If it is not 'DATA', proceed to #110 and the key is 'F
E E D”, if so, #13
0, executes a printer paper feed subroutine for feeding paper in the printer (16), and returns to #103. If the key is not “FEEL)”, proceed to #111 and the key is “H”.
If the key is 'HCOPY', proceed to #131, execute the screen copy subroutine to copy the display screen to the printer (16), and return to #103.If the key is 'HCOPY', proceed to #112. Proceed, key is LI
Determine whether it is S1'', and if so, #13
Proceed to step 2 and display the numerical data list of the measured values on the display (14).
A data list subroutine for displaying on the screen, printing on the printer (16), or outputting to the external input/output port (10) is executed, and the process returns to #102. If the key is not “LIST”, proceed to #113/\,
Determine whether the key is °'DEL", and if so, #
Proceeding to step 133, a data deletion subroutine is executed to delete the 1lt11 constant data currently displayed, and #
Return to 102. If the key is not “DIEL” #11
Proceed to 4/\, determine whether the key is ")IELP"', and if so, proceed to #134, execute the instructions subroutine for displaying an explanation of how to use the system, and return to #102. . If the key is not 'HELP', proceed to #115, determine whether the key is 'CUR', and if so, proceed to #135, and set whether or not to display the cursor on the spectral measurement value graph display. Execute the cursor ON10 F F subroutine that performs the processing for
Return to #103. #1 if the key is "'CUR'"
Proceed to step 16, determine whether the key is “→°°,
If so, the process advances to #136, executes a cursor left movement subroutine for moving the cursor of the spectral measurement value graph display to the right, and returns to #103. If the key is not ゛→pa, proceed to #117, determine whether the key is °“←′°, and if so, proceed to #137, and perform processing to move the cursor on the spectral reflectance graph display to the left. The cursor left movement subroutine is executed and the process returns to #103.

If the key is not ←″゛, proceed to #118 and the key is °゛D
It is determined whether or not OUT"", and if so, the process proceeds to #138 and executes a data output subroutine that outputs the measured data to the external input/output port (10).
Return to 3. If the key is not 'DOUT', proceed to #119, determine whether the key is 'PRINT', and if so, proceed to #139, send the measured data to the printer (16)
A data printing subroutine for printing is executed, and the process returns to #103. If the key is not 'PRINT', proceed to #120 in Figure 12(C) and the key is '°'1.
”, and if so, proceed to #140 and change the display scale of the spectral measurement value graph and chromaticity measurement value graph,
A range setting subroutine for setting the display range is executed, and the process returns to #103. If the key is not "r1°", proceed to #121, determine whether the key is "r2'", and if so, proceed to #141, and display the spectral measurement value graph and chromaticity measurement value graph. , Grid ON10 F to set whether to display the scale grid.
Execute the F subroutine and return to #103. key is r2
If not, proceed to #122, and determine whether the key is "3" or not. If so, proceed to #142, and perform processing to set which color system to use in color 1 direct calculation. Execute the color system setting subroutine and return to #1o2.If the key is not 'r3', proceed to #123, and if the key is 'r4'.
°.

If so, proceed to #143 and perform processing to set whether or not to display the reference value at the same time as the measured value in the display of the spectral measurement value graph.Reference value ○N/○
Execute the FF subroutine and return to #103. key is °
If it is not '[4''°, proceed to #124 and press the key °'f6
“°” is determined, and if so, the process proceeds to #144, executes a display mode setting subroutine that sets the format of the graph to be displayed and the unit of the measured value, and then executes the display mode setting subroutine in #102.
Return to

If the key is not °'rfS°', the process returns to #103.

Above, we have briefly explained the processing when various keys are pressed. Next, we will explain the main ones in detail. In step #200 of flowchart 1, the user is asked to select one of 19 setting items. Next, the process proceeds to #201, where it is determined whether the selected item is "light source" or not. If so, proceed to #202 and give the user D65. A, B, C, USE
Select one from R's five light source types for color value calculation, and return to #200.0 If the item is not "light source", #20
Proceed to step 3, determine whether the item is "field of view", and if so, in #204, the user is asked to select 2@field of view or 10° field of view, and the process returns to #200. If not #2
Proceed to step 05 and determine whether the item is "trigger mode". If so, proceed to #206 and set the trigger mode, which is an item that determines how to start measurement, to manual or external. Let the user select one from four options: single trigger, continuous external trigger, and timer.
Return to #200 0 If the item is not "trigger mode", proceed to #207, determine whether the item is "trace wavelength", and if so, proceed to #208, check the time change of spectral reflectance at the selected wavelength When displaying, the selected wavelength is set to be used, and the process returns to #200. If the item is not "Trace Wavelength", proceed to #209 and determine whether the item is a "Limit Warning". If so, proceed to #210 to determine if there is a difference greater than the limit value between the reference value and the measured value. The user sets whether or not to perform a warning process when a warning occurs, and the process returns to #200.0 If the item is not "Limit Warning", the process proceeds to #211, and if the item is "
If so, proceed to #212, have the user set the average number of times to use the average value of the measurements of the same mouth as the measurement value, and return to #200.0 item is " If it is not "average number of times", proceed to #213, and the item is "Determine whether or not print mode j is selected, and if so, whether to automatically print the measurement data for each measurement (AUTO), '"
The measurement data is printed only when the ``PRINT'' key is pressed, but the user has to set it to MANUAL, and the #200
Return to 0 If the item is in "print mode", proceed to #215, determine whether the item is a "print item", and if so, proceed to #216, when printing the measurement data, the spectroscopic Let the user select one or more types of data to be printed, such as data and color calculation values, #20
Returns to 0 0 If the item is not a "print item", proceed to #217, determine whether the item is in "data output mode", and if so, proceed to #218, transfer the measurement data to the external input/output port (io ) is automatically output for each measurement (
AUTO), ° Output measured data only when the “D OLI T” key is pressed (MANLIAL> is set by the user, return to #200 If the 9 items are not “data output mode”, go to #219) Then, it is determined whether the item is a "data output item", and if so, the process goes to #220, and when outputting the measurement data to the external input/output boat (10), one type or Let the user select which item of multiple types to output, and return to #200.0If the item is not a "data output item", proceed to #221, determine whether the item is 'R3232C mode J, and if so. If so, proceed to #222 and ask the user to connect R3, which is an external input/output boat.
The 6 items that allow you to set various modes such as the baud rate and stop bit length of the 232C boat and return to #200 are rR3.
If the item is not “232C mode”, proceed to #223 and the item is “232C mode”.
If so, proceed to #224 and use the measurement interval timer to determine its start time, interval time, end time, or number of times it ends, and whether to end it by time or number of times. Let the person set it, #200
Return to 0 If the item is not "timer", proceed to #225, determine whether the item is "clock", and if so, proceed to #22
Proceeding to step 6, the user is allowed to set the current time of the real-time clock (17), and the process returns to #200. If the item is not “Clock”, proceed to #227 and the item is “User Spectral Sensitivity”
If so, the process proceeds to #228 and the user inputs the spectral sensitivity.

Here, we will explain the meaning of user spectral sensitivity.Generally, when performing color calculations, the CIE spectral tristimulus values A, V, and Σ are used.For example, when measuring the color of a photograph, , three-color separation is performed using the spectral sensitivities shown in Figure 25, and each industry or user may use their own spectral sensitivities; in color measurement, :):L , ML, "It would be very convenient if any spectral sensitivity other than EQ could be used. In this embodiment, the data of X input and V island input are stored in the ROM (7) as standard.
This data is stored in RAM ( 8), and the sum of products of the spectral sensitivity, the spectral reflectance of the sample, and the spectral energy distribution of the light source can be calculated and displayed. Three types of spectral sensitivity can be input, making it convenient for three-color separation.

In steps #228 to #230, input the three types of user spectral sensitivities and set them as US 1 (i) and US 2, respectively.
(i).

Store in the memory US 3 (i) (i = O~30) and return to #200.If the 9 items are not "User Spectral Sensitivity", proceed to #231 and the item is "User Light Source".
If so, proceed to #232 and enter data on the spectral energy distribution of the user light source.
In the color calculation of the object color, which will explain the meaning of the user light source, D65 light source, A light source, B light source, C light source, etc. are used as standard light sources, and in this example,
The spectral energy distribution data of those light sources is stored in ROM
(7) and is used for color calculations, but if the user can define a light source with any spectral energy distribution apart from these standard light sources and perform color calculations using that light source, This is useful when evaluating color rendering, which is the effect of a light source and does not affect the appearance of object colors.In this example, the user can input any spectral energy distribution of the light source (hereinafter referred to as user light source). ), the data can be stored in RAM (8), and color calculation can be performed using the light source data. #232
Input the spectral energy distribution of the user light source and set LJ
Store in the memory P (i) (i=0 to 30) and return to #200.

If the item is not "User Light Source", proceed to #233 and determine whether the item is "User Standard Board".

If so, proceed to #234, input the spectral reflectance data of the user standard plate, store it in the memory R2(i) (i=O~30), and return to #200.

The user standard plate will be explained in detail in the explanation of the calibration subroutine to be described later, but simply put, the user uses a standard plate whose reflectance data has been measured by himself using a spectrometer, etc. in this example. This is the standard plate used when calibrating reflectance.

If the item is not “user standard board”, proceed to #235/\, determine whether the item is “limit value”, and if so, proceed to #2
Proceed to 36 0 In this embodiment, the upper and lower limits of spectral reflectance can be set for each wavelength, and a warning display is displayed when the measured spectral reflectance value deviates from the range of the limit values. It looks like this. Additionally, the upper and lower limit data can be overlaid on the spectral graph display that displays the measured spectral reflectance values, allowing you to see the relationship between the measured values and the limit values at a glance. It has become. #2
In 36, input the upper limit data and LfMH(i)
(i=O~30), and input the lower limit value data in #237, LIML(i)(i=0~30)
and return to #200.0 If the item is not a "limit value", proceed to #238, determine whether the item is a "reference value",
If so, proceed to #239 to perform measurement and use the measured value as the reference value.In #239, enter spectral reflectance data from the keyboard and select whether to use that value as the reference value. Display the selection items and wait for key power in #240. If there is key power, proceed to #241 and determine whether the key is 1 or not. If it is 1, the mode is to use the measured value as the reference value. , proceeds to #242, executes the photometry subroutine described above, and determines the spectral reflectance R(i) (i=
o~30), and in #244, store R(i> in the reference value memo')-STD(i) (i=o~30), and #2
Return to 00. In #241, if the key is not 1, #
Proceed to step 245 and determine whether the key is 2. If not, return to #240 and wait for key input. If the key is 2 in #245, input data from the numeric keypad is set as reference value data. mode, proceed to #246, enter the reference value spectral reflectance data from the numeric keypad, and input it into S
Store in T D (i) (i = 0 to 30) and #2
If the 0 item that returns to 00 is not the "reference value", proceed to #247, determine whether the item is "end" or not, and if so, end the setting subroutine and return to the 0 item that is "end".
Otherwise, return to #200.

This concludes the explanation of the setting subroutine, and next a description will be given of the calibration subroutine for calibrating the reflectance measurement value using a sample whose spectral reflectance is known in advance. A flowchart of the calibration subroutine is shown in FIG. 14. At #300, the user is asked to select one of five items. To explain the five items, "1. High-precision standard white plate" is a calibration using a high-precision standard white plate that has very little change in spectral reflectance over time but is expensive, and "2. Standard standard white plate" is a calibration using an inexpensive common standard white plate whose spectral reflectance changes over time are larger than that of a high-precision standard white plate. This is an item in which the spectral reflectance of a sample other than the attached white plate is measured using a spectrometer, etc., and calibration is performed using that sample. "41 Calibration Mode" is an item for selecting the calibration mode, and "5.
"End" is an item that ends the calibration subroutine.

In #301, determine whether the item is "End J", and if so, proceed to #302, end the calibration subroutine, and return.If not, proceed to #303, and if the item is "Completed", proceed to #302, end the calibration subroutine, and return. Determine whether it is proofread or not, and if so, #
Proceed to step 304, display a message to set a high-precision standard white plate as a sample, have the user select one of the two items "measurement" and "cancel" in #305, and #30
In step 6, it is determined whether the item is "cancelled" or not, and if it is "cancelled", the process proceeds to #307, the calibration subroutine is ended, and if the item is not "cancelled", the process proceeds to #308, and if the item is "cancelled", the process proceeds to #308. "Measurement" or not, if not, #305
If so, execute the photometry subroutine described above in #309, and set the measured value MEA S <i) in #310.
Store in CO(i) (i=0 to 30).

Next, in #311, a message indicating that a commonly used standard white plate is to be set as a sample is displayed, and in #312, the user is asked to select one of the two items "measurement" and "cancel", and in #31
In step 3, it is determined whether the item is "Cancel J", and if it is "Cancel", the calibration subroutine is ended and the process returns. If not, the process advances to #314, where it is determined whether the item is "measurement", and if not, the process returns to #312, and if so, the process proceeds to #315, where the photometry subroutine is executed. #3
16, the measured value ME A S (i) is changed to CI (i>(i=
o~30).

Next, in #317, calculate the spectral reflectance of the regular standard white plate using the [phase] formula, and store it in RL (i) (i = o ~ 30).
Proceed to #318, end the calibration subroutine, and return.

R1(i)-C1(i)XRO(i)/C0(i)
...[Phase] (i=0 to 30) In the above equation, RO(i) is the spectral reflectance data of the high-precision standard white plate, and its value is stored in advance in the ROM (7). That is, in #304 to #310, the measured values are calibrated using a high-precision standard white board, and in #311 to #310, the measured values are calibrated using a high-precision standard white plate.
In #317, the spectral reflectance of a commonly used standard white plate was measured and memorized. In #303, if the item is not "high-precision standard white plate", proceed to #319, and determine whether or not the calibration is to be performed using a commonly used standard white plate. If so, proceed to #320, and use the commonly used standard white plate as the sample. A message indicating that the setting is to be set is displayed, and in #321 the user selects one of the two items "Measurement" and "Cancel".In #322, it is determined whether the item is "Cancel" or not. If "Cancel", the process advances to #323, ends the calibration subroutine, and returns. If not "Cancel", proceed to #324, determine whether the item is "Measure", and if not "Measure", return to #321, select "Measure".
If so, the process advances to #325 and a photometry subroutine is executed. In #326, the measured value MEAS(i) is stored in C1(i>), the process proceeds to #327, the calibration subroutine is ended, and the process returns.

As mentioned above, in the apparatus of this embodiment, the absolute value calibration of the spectral reflectance includes calibration using a commonly used standard white plate and calibration using a high-precision standard white plate, which is inexpensive for daily calibration. In order to correct the changes over time in the spectral reflectance of the commonly used standard white plate, we use a high precision standard white plate to correct the spectral reflectance of the commonly used standard white plate once every few months. The method is to measure and store the information in memory. High-precision standard white plates are used infrequently, and by storing them in an appropriate place, they can be prevented from changing over time due to dirt and ultraviolet rays. Regular standard white plates are used only once every few months. Since the variation of f is corrected, maintenance is comparatively easy, and therefore, by this method, it is possible to construct a measurement system that is inexpensive, has good workability, and is highly accurate.

Now, in #319, if the item is not ``r regular standard white board'', the process proceeds to #328 in Figure 14(b), and the item is ``[r]
Determine whether it is a "user standard board" and if so, select #3.
Proceed 294.1m, stop at 1tllll)2
Let the user select one item from rjILl, determine whether the item is [Cancel] in #330, and if it is "Cancel", select #3
Proceed to step 31, complete the calibration subroutine, and return. If it is not "Cancel", proceed to #332, determine whether the item is "Measurement", and if not "Measure", return to #329, if "Measure", execute the photometry subroutine in #333, and # At 334, the measured value M E A S (i> is changed to C2 (
i) Store in (i=0-30) and return.

In #328, if the item is not "user standard board", proceed to #336, determine whether the item is in "calibration mode", otherwise return to #300, if so, #
Proceeding to step 337, one is selected from two types of calibration modes: reference white plate and user standard plate, and the process returns. When the standard white plate calibration mode is selected, when calculating the spectral reflectance of the sample, the value CI (i) obtained by the calibration using the commonly used standard white plate performed in #320 to #326 and #3
The spectral reflectance data RL (i) of the commonly used standard white plate measured in Nos. 11 to #317 is used. When the user standard plate calibration mode is selected, #3 is used when calculating the spectral reflectance of the sample.
The value C2(i) obtained by the calibration using the user standard plate in steps 29 to #334 and the spectral reflectance data R2(i) of the user standard plate input in #234 of the setting subroutine.
Use.

This concludes the explanation of the calibration subroutine, and next we will explain the measurement subroutine. Figure 15 is the flowchart 1 of the measurement subroutine. At #400, the trigger mode is first determined, and whether it is manual mode or #40
Proceed to 6, and if in timer mode, proceed to #401, #
In 401, the data of the real-time clock (17) is input, and the current time is set in #224 of the setting subroutine described above.
Determine whether or not the measurement start time set in ``NO'' has elapsed, proceed to #402, determine whether the stop key has been pressed, and if so, proceed to #403. Proceed to , end the measurement subroutine, and return. If the stop key is not pressed, return to #4011. #40
#404 if the current time has passed the measurement start time in 1
Go to #4 and clear the number of measurements J to zero.
At 05, store the current time in register T, and at #40
Proceed to 6. In #406, the photometry subroutine is executed,
In #407, a reflectance calculation subroutine is executed.

The calculation result is stored in R(i). Details of the 0 reflectance calculation subroutine will be described later. In #408, a calculation subroutine for calculations such as color calculation and limit discrimination is executed, and #
In step 409, a calculation value display routine for displaying measured values and calculation values is executed. In #410, it is determined whether or not there is free space in the memory for measured values. If there is no free space, the process proceeds to #411 to inform that there is no free space in the memory for measured values and the current measured value will not be stored. 1l11If there is free space in the fixed value memory, proceed to #413, add 1 to N1 indicating the number of the last measured data, and in #414 proceed to #412. Substitute N1 for N2 indicating the data number.

In #415, the value of N2, which is the number of the data being displayed, is displayed, and the process proceeds to #416, where the calculated spectral reflectance value R(i)<
1 = O ~ 30) value.

Store it in the memory for the N1th measured value and proceed to #412. #412t" determines whether the print mode is AUTO or not. If it is AUTO, proceed to #417 and select the value selected in #216 of the setting subroutine. Print the printed items on the printer (
16) and proceed to #418. If the print mode is not AUTO in #412, proceed to #418.
In #418, it is determined whether the data output mode is AUTO or not, and if it is AUTO, the process advances to #419/\ and outputs the data output item selected in #220 of the setting subroutine to the external input/output port (10). Proceed to #420, #41
In step 8, if the data output mode is not AUTO, the process advances to #420. In #420, the trigger mode is determined, and if it is manual mode, the process advances to #421, where the measurement subroutine is ended and the process returns. If it is timer mode, proceed to #422, increase the number of measurements J by 1,
In #423, the timer end mode is determined, and if it is the end mode based on the number of times, the process proceeds to #424, where it is determined whether the number of measurements J is equal to the end number set in #224 of the setting subroutine, and if they are equal, #425 and exit the measurement subroutine and return, if not equal #
Proceed to 426. In #423, if the timer termination mode is the time-based termination mode, proceed to #426;
At step 426, it is determined whether or not the stop key has been pressed, and if it has been pressed, the process advances to #425, where the measurement subroutine is ended and the process returns. #4 if the abort key is not pressed
Step 27 determines whether or not the current time has exceeded the time when the most tit measurement was performed plus the interval time set in step #224 of the setting subroutine. Return to and repeat the measurement. If the time has not elapsed, proceed to #428, determine the timer end mode, and if it is the end mode based on the number of times, return to #426,
Repeat checking the abort key and interval time 0
If the end time is in the time-based end mode, proceed to #429, determine whether the current time has passed the end time, and if so, proceed to #425, end the measurement subroutine and return; Return to #426 and press the cancel key.
Repeat checking the interval time and end time.

This concludes the explanation of the measurement subroutine, and next the reflectance calculation subroutine used in #407 of the measurement subroutine and #243 of the setting subroutine will be explained. Figure 16 is a flowchart of reflectance calculation. Zero reflectance calculation calculates the spectral reflectance of a sample from the spectral reflectance data of the standard plate used for calibration, the measured value, and the measured value of the sample. be. At #500, the wavelength counter I is first cleared to 0. In #501, it is determined whether the current calibration mode is the standard white plate or the user standard plate. This calibration mode is
If the 0 calibration mode set in #337 of the calibration subroutine is a standard white plate, the spectral reflectance R(I) of the sample at the first wavelength is calculated using the formula in #502, and # Proceed to 504.

MEAS(1) R(1>=-7, (I) x R1(1) =-■ In the above equation, MEAS(1) is the measured value of the sample, and C1(1) is the commonly used standard white color determined by the calibration subroutine. The measured value of the plate, R1 (
I) is the spectral reflectance of a commonly used standard white plate determined in the calibration subroutine. If the calibration mode is the user standard plate in #501, the spectral reflectance R(1) of the sample at the wavelength is calculated using the [phase] formula in #503, and the process proceeds to #504.

MEAS (I) R (I) = C2 (1, x R2 (1) -...[Phase] At #504, add 1 to the wavelength counter I, and at #50
5 to determine whether 1 is 31 or 100 0 In this example, 400
Since we calculate the reflectance of 1°n-pitch in the wavelength range from n- to 70On-, ■ is 0 to 30, and ■ is 31.
Since the reflectance of all wavelengths has been calculated at the time when I is 31, the process proceeds to #506, ends the reflectance calculation subroutine, and returns. If ① is not 31, the process returns to #501 and is repeated until the reflectance calculations at all wavelengths are completed.If the value is 0 or more, the explanation of the reflectance calculation subroutine ends.

Next, we will explain the calculation subroutine used in #408 of the measurement subroutine.This subroutine calculates the spectral reflectance R(i) of the sample calculated by the reflectance calculation subroutine.
This is a subroutine that performs various color 3-total calculations and limit discrimination processing based on .

FIG. 17 is a flowchart of the calculation subroutine.

In #600, the color system mode is determined, and if the color system mode is the user spectral sensitivity mode, proceed to #601.
In #601 to #609, the type of light source selected in #202 of the setting subroutine is determined, and the data of the spectral energy distribution of the selected light source is stored in P (i).1 If the selected light source is C65, If it is one of the A, B, or C light sources, the respective spectral energy distribution data D65(i) and A(i
), B(i>, C(i) (i = 0 to 30) as P(i)
0 If the selected light source is a user light source, the spectral energy distribution data U P (i) of the user light source set in #232 of the setting subroutine is stored in P (
1). In #610, color calculation is performed for the first user spectral sensitivity US l (i). As shown in the flowchart, the spectral energy distribution P(
i), the first user's spectral sensitivity U S 1 (i), and the sample's spectral reflectance R (i) within the measurement wavelength range, and then calculate the measurement wavelength of P (i) and U S 1 (i). The value divided by the sum of products within the area is calculated as the first user color data UC (
Substitute into 1). #611. In #612, 2 each
3rd user spectral sensitivity US2(i), US3
For (i), perform the same calculation as #610, and calculate the 21st and 3rd user color data UC(2) and U, respectively.
0th order to be substituted into C(3), #613. #614゜#6
Regarding the spectral reflectance data S'l''D(i) of the reference value set after #239 of the setting subroutine in step 15, the user spectral sensitivity U S 1 (i), U S 2 (i)
, US 3 (i), and calculate the values as USTD(1), USTD(2), and LISTD, respectively.
(3) 4.1m stored 0 Next, in #616, set the user spectral sensitivity number I to 1, and in #617, determine whether the color system is logarithmic mode or percentage mode of the user spectral sensitivity, and in logarithmic mode. If there is #618. #619, UC(1
) and USTD (1) from percent 1 to the absorbance value, and when measuring the color density of a color photograph by setting the spectral sensitivity for measuring the color density of a color photograph as the user spectral sensitivity, generally Since color evaluation is done using logarithmic values, the function of calculating absorbance values, which are logarithmic values, is very effective. In #620, the difference between the measured value and the reference value is calculated and ΔU
If the 0 color system stored in C(I> is not logarithmic mode but percentage mode, proceed to #622 and select UC(I)
Calculate the ratio between 1.2
．． For 3, perform the calculations in #617 to #621, and
Proceed to 624.

In #600, the color system is user spectroscopy! If the mode is not 8 degrees but XYZ mode, the tristimulus value data (previously stored in ROM (7)) of the field of view (2 degrees or 10 degrees) selected in the setting subroutine in #625 and the selected From the spectral energy distribution data of the light source and the spectral reflectance data of the sample, the normal XYZ color system or X,, Y,, Z, is calculated.

The color calculation is performed using the color system, and the process proceeds to #624.

In #624, the limit warning mode selected in #210 of the setting subroutine is determined, and if the limit warning mode is set (ON), the process proceeds to #625. In #625, the wavelength number I is cleared to zero. In #626, the spectral reflectance R(1) of the sample at the first wavelength is greater than or equal to the upper limit value L I M H (1) of the spectral reflectance at the first wavelength set in #236 of the setting subroutine. determine whether there is
If so, the process advances to #627, displays a limit warning indicating that the spectral reflectance of the sample is outside the allowable range, terminates the calculation subroutine, and returns. In #626, if R(I) is smaller than LIMI-1(I), proceed to #628;
Determine whether the spectral reflectance R(I) of the sample at the first wavelength is less than or equal to the lower limit value LIML(I) of the spectral reflectance at the first wavelength set in #237 of the setting subroutine; If so, the process advances to #627, displays a limit warning indicating that the spectral reflectance of the sample is outside the allowable range, and returns. In #628, R(1) is LIML(I)
If it is larger than , proceed to #629 and set 1 to wavelength number I.
In #630, in order to determine whether all wavelengths have been completed, it is determined whether ■ is 31 or not, and if "" is NO, the next wavelength is , #
Repeat the limit determination after 626. If "YES", it means that the spectral reflectance of the sample at all wavelengths is within the allowable range, so in #631, erase the limit warning display and execute the calculation subroutine. The process ends and returns. If the limit warning mode is a mode in which limit discrimination warning is not performed (OFF) in #624, the process immediately proceeds to #631 without performing limit discrimination, erases the limit warning display, and returns. This concludes the explanation of the calculation subroutine.

Next, the calculation value display routine used in #409 of the measurement subroutine will be described. FIG. 18 is a flowchart of a blue routine for displaying calculated values. Figure 19 (a
)(1+) shows an example of the display. In #700, the first
2 [Determine whether the display mode set in the display mode setting subroutine #144 of 2(c) is the spectral reflectance display mode, and if "'YES°", proceed to #701;
If the measured value of Moe is currently displayed on the spectral reflectance graph, it is erased and the spectral male weight resistance measurement value currently stored in R(i) is displayed on the spectral reflectance graph. here,
Determine whether the cursor display mode is ON or not, and if it is ON, process to correct the cursor currently displayed on the spectral reflectance graph and the number of data (color display) at the cursor point to correspond to the new measurement value. We will also do

Next, from #702 onwards, a time-varying graph of spectral reflectance at the selected wavelength is displayed. First, in #702, the selected wavelength number I is set to zero. In this embodiment, the j11 selected wavelength is WL(0), Three types of WL(1) and WL(2) can be set in the range of 400n+a to 700nm with 11111 pitches, and #208 of the setting subroutine
It is set in . Since the spectral reflectance measurement values are at intervals of 10 nm, the spectral reflectance at the selected wavelength is determined by interpolation calculation. #
In 703, the value obtained by rounding down the 1 digit of the first selected wavelength WL(I) is assigned to WL. In #704, a wavelength number k corresponding to the wavelength WL is calculated. In #705, the spectral reflectance R(k) at the wavelength W L n− and the wavelength (W
Spectral reflectance R(k-1) at L I O) nm
Using the value of , the spectral reflectance at wavelength WL(1) is calculated by interpolation and substituted into y. In #706, determine the value of ■, and if I=O, mark X in #707, I=
If 1, mark #708, if I=2, mark #709
An O mark is drawn at the coordinates (N 2 , y) of the time change graph. That is, so that the data of the three selected wavelengths can be identified, the data at the 0th selected wavelength W L (0) is an X mark, the data at the 1st selected wavelength W L (1) is an Data at the selected wavelength WL<2> is indicated by an O mark. Here, N2 is the data number of the data to be displayed, as explained in the measurement subroutine. Add 1 to I in #710, and add ■ in #711.
Determine the value of I = 0.1.2, #
In the 6-hour variable 1-hi display, which performs the processing from 7o3 to #710 and proceeds to #712, the graph displayed immediately before is overwritten with new data, and the spectral reflectance of the selected wavelength is Since the data from the oldest to the newest is displayed simultaneously from left to right I\\, the user can see the changes over time. In addition, on the spectral reflectance graph, a vertical broken line is drawn in advance at the position of the selected wavelength, and above it is a mark corresponding to each selected wavelength.
・, Since ○ is drawn (see Figure 19 (a)),
The relationship between the selected wavelength and the mark can be seen at a glance.Next, proceed to #712, determine whether or not the cursor is currently being displayed, and if it is, proceed to #713, and set the reflectance time. Move the cursor displayed on the change graph to position N2 on the horizontal axis. This cursor indicates which data on the time change graph corresponds to the data displayed on the spectral reflectance graph. If the cursor is not displayed in #712, the process immediately advances to #714. In #714, the color calculation value calculated in the calculation subroutine is displayed numerically, and the process proceeds to #7.
Proceed to step 15 to end the brutine that directly displays the calculations.

Return. If the display mode is not the spectral reflectance display mode in #700, it is the color graph display mode, so #7
Proceed to step 16, and thereafter display a color graph (see FIG. 19 (b>). In step #716, the current color system is XYZ.
Determine whether it is a color system or a user spectral sensitivity color system. If it is an XYZ color system, proceed to #717. Plot the Yxy calculated values on the Yxy chromaticity coordinate graph and proceed to #714. #718 to #72o for user spectral sensitivity color system
Proceed to the coordinates of the user color time change graph (N 2
, UC(1)), and the coordinates (N2.UC(2)
) and a circle mark at the coordinates (N2.UC(3)), then proceed to #712. UC(1), UC(2),
As mentioned in the calculation subroutine, UC(3) is the user spectral sensitivity U S 1 (i) and U S 2 (
i), is the color calculation value corresponding to U S 3 (i).

In #712 to #713, similarly to the time change graph of spectral reflectance, a cursor is displayed to show where the data corresponding to the data number being displayed is located on the user color time change graph, and the next In #714, the color calculation value is displayed numerically and returned.0 In this embodiment, uC(1) and UC(2>) are displayed in the user color time display graph.

Although the value of UC(3) is graphed, it is also easy to provide a function to graph t4Uc(1), ΔUC(2>, ΔUC(3)), which represents the deviation from the reference value. In order to identify the plot points in the reflectance time change graph and the user color time change graph, the marks of the plot points are changed to ×, ・, O, but if the display device is color This concludes the explanation of the broutine that displays a calculated value with a value greater than or equal to 0, which may be distinguished by the color to be displayed.

Next, the data number setting subroutine will be explained. Figure 20 shows the flowchart of the data number setting subroutine. In this subroutine, data of an arbitrary number is called for display from among the N1 measured value memories. , and performs processing to obtain reflectance data. The user inputs a data number and the memory contents of that data number are called up, so the data number can be input using the numeric keypad and set as numeric data.゛°、"'l"、'"→"、゛″←゛←
It is also possible to continuously increase or decrease the data number by pressing the key. By displaying the stored contents of the data number on the graph every time the data number is continuously increased or decreased by 3+lt and every time the data number changes, the time change of the spectral reflectance data can be seen on the spectral reflectance graph. It can be recognized as a moving image. The process will be explained below according to the flowchart shown in FIG. At #800, it is first determined whether Nl<data number of final measured value) is zero. If N1 is zero, it means that there is no 1ltll constant value, so proceed to #801 and return without doing anything. If Nl is not zero, proceed to #802 and wait until there is key power. If there is key force, proceed to #803, determine whether the key is a numeric key or not, and if it is a numeric key, write data like a numeric keypad. It is assumed that this is a number input, and the process proceeds to #804, where a numerical value is input from the numeric keypad and stored in variable N.

In #805, it is determined whether the value of variable N is appropriate or not, and “Y
ES", substitute N 2 Gm N and proceed to #8o7. As mentioned above, N2 is a variable that represents the data number of the data being displayed. If N is not an appropriate value in #805, change N2. Proceed to #807 without changing the value. #807
Then, the 1st shift of N2 is displayed as the data number display. #8
In 08, the N2th flood lI is added to the spectral reflectance data R(1).
5'i: Store i direct memory MEM (N2゜i), #
In 809, the calculation subroutine is executed using the R(i>), and in #810, the broutine that directly displays calculation 1 is executed, and the process returns to #8o2.If the key is not a numeric key in #803, the process goes to #811. Proceed. In #811, set the variable k to 5 to adjust the data number change speed. The larger the value, the slower the data number change speed. In #812, set the key manual content to KM.
Store it in the variable called . In #813, it is determined whether the contents of the key manpower and the contents of KM are equal or not, and if they are equal, the process proceeds to #814. In #814, it is determined whether the key is a cancel key or not, and if it is a cancel key, the process advances to #815, ends the data number setting subroutine, and returns. If it is not the cancel key, proceed to #816, and thereafter #816 to #824
Determine the content of the key power, and if the key power is the ゛°bi' key, set it to 10, if it is the ゛↓'° key, set -10, °“-
Set the data number change value d to 1 for the ゛′ key, -1 for the °−“ key, and 0 for other keys.
Proceed to #825. In #825, the value obtained by adding d to N2 is assigned to N, and in #826 to #83, the appropriateness of the value of N is determined. If N is less than zero, N2 = 1, N If is larger than the data number N1 of the final measured value, set N2=N1 and proceed to #831)\. If N is a proper value, set the value of N to N
Substitute 2 and proceed to #831'\. In #831, the value of N2 is displayed as the data number display, and in #832, the spectral reflectance data R(i) is set to the N2th measurement value memory MEM.
The contents of (N2.1) are stored, a calculation subroutine is executed in #833, and a buroutine for displaying the calculated value is executed in #834. After #835, it is determined whether the key is being pressed continuously and the process waits for a time to adjust the data change speed. In #835, it is determined whether or not the key has been pressed. If the key has not been pressed, the process returns to #802 and waits for a new key. If the key has been pressed, the process waits for 100 m5ec in #836. In #837, k is subtracted by 1, and in #83
Determine whether k is zero at step 8 and continue until it becomes zero #835
~ Repeat #837, if k becomes zero, k in #839
Set 1 to 1 and return to #813. In #813, the key manual content memory KM is compared with the current key manual content,
If they do not match, the process returns to #802 and waits for a new key input, but if they do match, the data numbers are increased and decreased repeatedly, i.e. "'↑°゛, °"↓゛, "-°°,"-°' If you keep pressing one of the keys, the data scent will increase/decrease continuously, but the time interval from MI+JJ data number increase/decrease to the second data number increase/decrease is 500 m5ec, and after that, the time interval is 100 m5ec. become. Also, if the keys ↑゛° and ↓°° are used, a high-speed increase or decrease by 10 units is performed, and if used by "-°'" or ``-'', a slow increase or decrease by 1 unit is performed. In other words, there are 4 data number change speeds, and when you want to view the time change in spectral reflectance as a moving image of a spectral reflectance graph, you can select the speed, which is convenient. End the explanation.

Next, we will explain the display routine used in #102 of the main program flowchart in Figure 12(a). However, the "display routine" described below will display the new display mode, color system, selected wavelength, etc. after the display mode, color system, selected wavelength, etc. have been changed.
This subroutine is used when redrawing a graph from the beginning, or when displaying a graph again after the display changes to something other than a graph, such as when displaying instructions for use.

FIG. 21 is a flowchart of the displayed blue routine.

Further, an example of the display is shown in FIG. 19, and in #900, all the displays are erased. The display mode is determined in #901, and if it is the spectral reflectance display mode, the process proceeds to #902, where the frame and units of the spectral reflectance graph and the frame and units of the time change graph of spectral reflectance are drawn. In #903, it is determined whether the grid display mode is ON or OFF, and if it is ON, in #904, a grid is drawn on the spectral reflectance graph and the time variation 1 whisker graph of the spectral reflectance (see FIG. 19(c)). If the grid display mode is OFF in #903, proceed to #905 without passing through #904.In #905, the spectral reflectance graph is marked with a vertical broken line and an x to indicate the position of the selected wavelength for time change display.・Draw a 0 mark. #906 determines whether the limit warning mode is ON or OFF, and if it is ON, #90
In step 7, display the spectral reflectance upper limit data LIMH(i) and lower limit value data IML(i) on the spectral reflectance graph and proceed to #908. If it is OFF, continue to #
Proceed to 908, cursor display mode is turned on in #908
If it is ON, move the cursor to 1 with #909.
1a stroke and numerically display the data at the cursor point #91
If it is OFF, proceed directly to #910. In #910, it is determined whether the reference value display mode is ON or not. If it is ON, the reference value data S is displayed in #911. Display T D (i) on the spectrograph #91
2I\Proceed. If it is OFF, proceed directly to #912.

If the display mode is the color graph display mode in #901, proceed to #926/\, determine whether the color system is the XYZ color system or the user spectral sensitivity color system, and if it is the XYZ color system, proceed to #926/\\.
Draw the frame and units of the graph, and if it is a user spectral sensitivity color system, draw the frame and units of the user color time variation 1 whisker rough. Determine whether the grid display mode is ON or OFF in #929, and if it is ON, draw a grid on the Yxy graph or user color time change graph in #930, and #9
Proceed to #Cj12. If it is OFF, do nothing and proceed to #Cj12.

#912~#9L7' is the first measurement in order to convert all the memory contents of the measured values from 1st to N1th into a time display graph of spectral reflectance, a Yxy graph, or a time change graph of user color. 1st memory MEM (1, i> to N1th measured value memory ME
Spectral reflectance R(i) in order toward M(N 1 , i)
#918 to #922 display the spectral reflectance graph, color calculation value, etc. of the N2th measurement value memory MEM (N2)i). This is the process for #91
In step 8, draw a frame and units for numerical display of color values, and #
At 919, assign MEM(N2.i> to R(i), #9
The calculation subroutine is executed in step 20, the value of N2 is displayed as the data number in step #921, the calculation value display subroutine is executed in step #922, and the explanation of the subroutine for displaying 6 or more is completed.

Next, the grind ON/'OFF subroutine used in #141 of the 12th [ff1(c)] will be explained.

This subroutine erases the grid display if the grid is displayed, draws the grid display if the grid is not displayed, and draws the grid after erasing the cursor display if the cursor is displayed. do. The flowchart is shown in No. 22121.

Next, a description will be given of the cursor ON10FF subroutine that is executed at #135 in FIG. 12(b).

This subroutine erases the cursor display and numerical display of the data at the cursor point if the cursor is displayed when the 5 display mode is the spectral reflectance display mode, and displays the cursor and displays the data at the cursor point numerically if the cursor is not displayed. If the grid is being displayed and the grid is being displayed, the grid display is erased before the cursor and data at the cursor point are drawn.

FIG. 23 shows the flowchart 1-. Grid ON
10 FF Subroutine and Cursor ON As can be seen from the explanation of the 10 FF subroutine, care has been taken not to mix the grid display and cursor display, and prevents the graph from becoming difficult to see due to the mix of the grid and cursor.

! ltf&, the reference value 0N10FF subroutine used in #143 of FIG. 12(c) will be explained.

This subroutine switches whether or not to display the reference value 5TD(i) on the spectral reflectance graph at the same time as the measured value when the display mode is the spectral reflectance display mode. When 5TD(i) is displayed on the graph, it disappears, and when 5TD(i) is not displayed on the graph, the reference value 5TD(i) is displayed on the spectral reflectance graph.A flowchart is shown in FIG.

(Effects of the Invention) Since the present invention is configured as described above, an arbitrary coefficient can be set for each wavelength by the coefficient setting means, and the above coefficient set and the spectral 11111 constant value can be calculated for each wavelength by the sum-of-products calculation means. By calculating the added value of the products of In addition, it can be used in various fields such as photographic color density measurement and printing color density measurement.

In addition, the combined invention provides a spectrometer that measures either the spectral reflectance or the spectral transmittance of the sample by illuminating the sample with an illumination light source.
When calculating the added value of the product of each wavelength with the constant value, the spectral distribution of the light source used for color evaluation calculation is also multiplied, so the color of an object under an illumination light source with an arbitrary spectral distribution This has the effect of letting you know how it looks.

Note that if the coefficient setting means can set multiple coefficient sets, and the product-sum calculation means can calculate the sum of products for each coefficient set, multiple spectral sensitivities can be set. This is advantageous for measuring decomposition values, etc.

Also, in the product sum calculation means, the product sum needle! If the system is configured to be able to calculate the logarithmic value of 1M, photographic color density and the like can be evaluated using logarithmic values, which is advantageous, for example, when performing color measurement of color photographs.

Furthermore, if the coefficient setting means is configured to display the set coefficient values in a graph, the set coefficient values can be easily confirmed on the graph display, thereby preventing mistakes in setting the coefficients.

[Brief explanation of drawings]

Figure 1 is a claim correspondence diagram showing the basic configuration of the present invention, Figure 2 is a claim correspondence diagram showing the basic configuration of the present invention.
The figure is a block diagram showing the overall configuration of a spectrometer according to an embodiment of the present invention, FIG. 3 is a circuit diagram of a current-voltage conversion integration circuit used in the above, and FIG. 4 is a circuit diagram of a photometric circuit used in the same. A circuit diagram showing one block, Fig. 5 is a circuit diagram of a photometric circuit used in the above, Fig. 6 is a timing chart for explaining the operation of the circuit in Fig. 3, and Fig. 7 is a lighting circuit used in the same. 8 is a timing chart showing the photometry timing in the above, FIGS. 9(a) to (d) are flowcharts showing the photometry operation in the above, and FIG. 10(a) is the spectral sensitivity of the photometry circuit in the above. FIG. 10(b) is an explanatory diagram for explaining the division of wavelength regions in the same as above, FIG. 11 is an explanatory diagram for explaining wavelength correction in the same as above, and FIGS. 12(a) to (c)
) is a flowchart 1 for explaining the operation of the entire system in the above, FIGS. 13(a) to (C) are flowcharts of the setting subroutine in the above, and FIG. 14(
a) (b) is the flowchart 1 of the calibration subroutine in the same as above, and FIGS.
]11 constant sub small subroutine - chart, Figure 16 is a flowchart of reflectance calculation in the same as above, Figure 17 (a
) to (C) are flowcharts of the calculation subroutine in the same as above, FIG. 18 is a flowchart of the calculation value display subroutine in the same as above, and FIGS. Figure 20 (a
)(b) is a flowchart of the data number setting subroutine in the same as above, 211:A is a flowchart of the display routine in the same as above, FIG. 22 is a flowchart of the subroutine for grid display in the same as above, and FIG. FIG. 24 is a flowchart of a subroutine for displaying a reference value in the same as above; FIG. 25 is a diagram showing a spectrometer for measuring color density of photographs that can be used in the same as above;
FIG. 26 is a diagram showing an example of the arrangement of the keyboard used in the same. (tJS) is a coefficient setting means, US 1 (i), US
2 (i). U S 3 (i), ... are coefficients, R(i) is the spectroscopic measurement value, (ΣM) is the sum of products calculation means, (1) is the sample, (2)
is the illumination light source, and P(1) is the spectral distribution of the illumination light source.

Claims (5)

[Claims] (1) The spectrometer has a coefficient setting means for setting an arbitrary coefficient for each wavelength, and a sum-of-products calculation means for calculating the sum of products of the spectroscopic measurement value and the coefficient set for each wavelength. A spectroscopic measurement device characterized by: (2) In the device according to claim 1, the coefficient setting means can set a plurality of coefficient sets, and the product sum calculation means is a calculation means for calculating the product sum for each coefficient set. A spectroscopic measurement device characterized by: (3) A spectroscopic measuring device according to claim 1, wherein the product sum calculation means is a calculation means capable of calculating a logarithm value of the product sum calculation value. (4) The spectrometer according to claim 1, wherein the coefficient setting means includes display means for displaying the set coefficient value in a graph. (5) In a spectrometer that measures either the spectral reflectance or the spectral transmittance of a sample, a coefficient setting means for setting an arbitrary coefficient for each wavelength, and a spectral distribution of a light source used for spectral measurement values and color evaluation calculations. A spectroscopic measuring device comprising: a product-sum calculation means for calculating a sum of products of the coefficient set and the coefficient set for each wavelength.