JP6502195B2 - Measuring device and measuring method - Google Patents

Description

The present invention relates to a measuring apparatus and measuring method for measuring the radiation amount of light for each wavelength within the measurement target wavelength range to specify the tristimulus value XYZ of the light to be measured.

  For example, even if the white balance adjustment measuring instruments used in product production bases and development departments differ in the production of liquid crystal televisions in the following patent documents, the deviation due to the differences in the measuring instruments is A method (hereinafter, also referred to as a "production control method") that enables accurate white balance adjustment by calibration is disclosed.

  In this production control method, first, in the development department, reference data is obtained from a standard sample. Specifically, in a state where a standard image is displayed on a standard sample, white balance is performed so that the luminance and chromaticity defined in advance are obtained while measuring the luminance and chromaticity on the screen using a spectral radiance meter Make adjustments. In addition, when the adjustment is completed, the first measurement data indicating the measurement values (brightness and chromaticity) at that time is acquired as reference data, and the standard sample after the adjustment is transferred to the production site.

  Next, at the production site, it was transferred from the development department using a measuring instrument (for example, a color analyzer) used when performing white balance adjustment of the product (liquid crystal television of the same type as the standard sample) produced at that site. Perform measurements on standard samples. Specifically, the second measurement data is measured by measuring the luminance and chromaticity on the screen using a color analyzer while displaying the same reference image as when the white balance adjustment is performed in the management department. get.

Subsequently, based on the first measurement data and the second measurement data, calibration data for calibrating the color analyzer at the production site is calculated. Specifically, the tristimulus values based on the calculated tristimulus values XYZ based on the first measurement data (measurement result of spectral radiance meter), and the second measurement data (measurement result of the color analyzer) XYZ While generating calibration data based on the difference between the two tristimulus values XYZ . Thereafter, for products manufactured at the production site, white balance adjustment performed on the standard sample in the development department by performing white balance adjustment using the color analyzer calibrated using the above calibration data It becomes possible to adjust the white balance of the product as well.

JP-A-2014-87037 (pages 5-11, 1-7)

  However, the following problems exist in the production control method disclosed in the above-mentioned patent documents. That is, in the above production control method, when generating calibration data for calibrating a measuring instrument used when performing white balance adjustment at a production base, reference data from a standard sample using a spectroradiometer (First measurement data) is acquired.

  In this case, at the development site of a display such as a liquid crystal television, the radiation amount of light within the measurement target wavelength range is set at a sufficiently narrow wavelength interval (wavelength resolution) of about 5 nm so that accurate measurement results can be obtained. A measurable spectroradiometer (e.g. a polychromator spectroradiometer) is used. In addition, in order to accurately measure light with a small amount of radiation, it is necessary to use a spectral radiance meter having a sufficiently high sensitivity of the light receiving sensor for each wavelength. For this reason, in a spectral radiance meter used in a development site of a display, etc., the detectable wavelength range (range of the wavelength having substantial sensitivity) of the light receiving sensor for each wavelength is the wavelength of the spectral radiance meter It is wider than the resolution (about 5 nm).

  Specifically, in this type of spectral radiance meter, as shown in FIG. 3, the relative spectral sensitivity of the light receiving sensor for measuring the radiation amount of light of wavelength λ nm has a characteristic as shown by the solid line 50a. The relative spectral sensitivity of the light receiving sensor for measuring the radiation amount of light of wavelength (λ-d) nm (“d” is a wavelength corresponding to the wavelength resolution of the spectral radiance meter) is indicated by a dashed dotted line 50b. The relative spectral sensitivity of the light receiving sensor for measuring the radiation amount of light of wavelength (λ + d) nm is as shown by a two-dot chain line 50c. In this case, in the example shown in the drawing, the detectable wavelength range of each light receiving sensor is wider than ± 5 nm by setting the sensitivity of each light receiving sensor to a certain high sensitivity A1.

  Therefore, as shown in the figure, the light receiving sensor for wavelength λ nm not only detects light of wavelength λ nm with sensitivity A1, but also light of wavelength (λ−d) nm and light of wavelength (λ + d) nm Also for each of Similarly, the light receiving sensor for the wavelength (λ-d) nm not only detects the light of the wavelength (λ-d) nm with the sensitivity A1, but also the light of the wavelength λ nm and the wavelength (λ-2d) nm Light is also detected with sensitivity A2, and the light receiving sensor for wavelength (λ + d) nm not only detects light with wavelength (λ + d) nm with sensitivity A1, but light with wavelength λ nm and light with wavelength (λ + 2 d) nm The light is also detected by the sensitivity A2.

  Therefore, this type of spectral radiance meter can emit a certain amount of radiation even for light of a wavelength shorter than the wavelength of light actually incident, and light of a wavelength longer than the wavelength of light actually incident. It has a characteristic to be detected (hereinafter, such a characteristic is also referred to as "spread of spectrum width"). Further, the spread of the spectrum width tends to be further spread as the sensitivity of each light receiving sensor is increased.

  In this case, as shown in FIG. 4, for example, when light from a white LED is measured by a spectral radiance meter, the spectral sensitivity for each wavelength of the actually emitted light has a spectrum as shown by the solid line 60a. The measurement result including the influence of the above-mentioned spread of the spectrum width in the spectral radiance meter becomes a spectrum shown by a broken line 60b, and both are slightly different. However, for continuous spectrum light (light with a wide spectral width) such as light from a white LED, the effect of the spread of the above spectral width extends over a wide wavelength range as well, so the actual spectrum and measurement results Is almost the same as the spectrum of

Therefore, for light with a wide spectrum width, three light sources for each wavelength are calculated based on the measurement results (emission amount) for each wavelength by the spectral radiance meter and values corresponding to each wavelength in the color matching function. As a result that the photometric quantity corresponding to the stimulation value XYZ becomes a nearly accurate value, it is possible to calculate the tristimulus value XYZ of the combined light of the light of each wavelength based on this accurate photometric quantity. In addition, although illustration and detailed description are omitted, even when light from a liquid crystal television configured to include red LEDs, green LEDs, and blue LEDs (combined light of light of each wavelength) is to be measured, Because the spectrum width of the light from the LED is wide, the actual spectrum and the spectrum of the measurement result are almost the same. For this reason, even when light from a liquid crystal television is to be measured, the tristimulus values XYZ calculated based on the measurement result by the spectral radiance meter become to some extent accurate values.

  On the other hand, today, laser projectors have been developed which are provided with a red laser, a green laser and a blue laser as light sources, and project various images on a screen by combined light of lights (laser lights) from the respective lasers. In this case, it is known that the light emitted from the laser (laser light) has a very narrow spectral width. Specifically, as shown in FIG. 4, the spectra of the light from the red laser, the light from the green laser, and the light actually emitted from the blue laser are as shown by the solid lines 70ra, 70ga, and 70ba, respectively. There is.

  When configuration data is generated according to a conventional production control method for such a laser projector from which light is emitted, the measurement result by the spectral radiance meter indicates that the red laser is caused due to the spread of the above-mentioned spectrum width. The light from the light source has a spectrum shown by a broken line 70rb, the light from the green laser has a spectrum shown by a broken line 70gb, and the light from the blue laser has a spectrum shown by a broken line 70bb.

Thus, for light having a very narrow spectral width, such as light from a laser, a wavelength that does not actually exist or a wavelength for which the actual radiation amount is very small due to the spread of the spectral width described above Since light is detected as having a certain amount of radiation, each wavelength calculated based on the measurement result (radiation amount) of each wavelength by the spectroradiometer and the value corresponding to each wavelength in the color matching function The photometric quantity corresponding to each tristimulus value XYZ becomes inaccurate. For this reason, in the conventional production control method of acquiring reference data using a spectroradiometer, the tristimulus value XYZ of the combined light of light of each wavelength is accurately calculated for light with a very narrow spectrum width. There is a problem that it is difficult to generate accurate calibration data because of this. Although the detailed description is omitted, the above-mentioned problems caused by the spread of the spectrum width occur similarly when the monochromator type spectroradiometer is used.

The present invention has been made in view of such problems, and provides a measuring apparatus and measuring method capable of accurately measuring tristimulus values XYZ of combined light of light of each wavelength even for light having a narrow spectral width. As the main purpose.

In order to achieve the above object, according to the first aspect of the present invention, the measuring apparatus according to the first aspect comprises: a first red wavelength range of light output from the red laser; a first green wavelength range of light output from the green laser; A measuring unit for measuring the radiation amount of light within a measurement target wavelength range including the respective wavelength ranges of the first blue light wavelength range of the light to be output at predetermined first wavelength intervals to generate measurement value data; A processing unit that executes tristimulus value identification processing for identifying tristimulus values XYZ of the light from the red laser, the light from the green laser, and the combined light of the light from the blue laser based on the measurement value data with the door, wherein the processing unit in the tristimulus value specification processing, on the basis of the measurement value data, not including the first green light wavelength range and the first blue light wavelength range, and the first red light wavelength Including the range A representative red light wavelength within the defined second red light wavelength range is specified, and the first red light wavelength range and the first blue light wavelength range are not included, and the first green light wavelength range is included in advance. While specifying a green light representative wavelength within the defined second green light wavelength range, not including the first red light wavelength range and the first green light wavelength range, and including the first blue light wavelength range The red light representative wavelength in the color matching function on the basis of a representative wavelength specifying process for specifying a blue light representative wavelength within the second blue light wavelength range defined in advance, and the specification result of the representative wavelength specifying process and the measurement value data using values corresponding as a coefficient corresponding to the tristimulus values XYZ for each wavelength of light within the second red light wavelength range of the radiation of each wavelength of light within the second red light wavelength range Calculate the photometric amount respectively, Three to radiation of each wavelength of light within the second green light wavelength range using a value corresponding to the green light representative wavelength as a coefficient for each wavelength of light in the second green light wavelength range of thereby calculating photometric quantity corresponding to the stimulus value XYZ of each, the amount of radiation for each wavelength of light within the second blue light wavelength range using a value corresponding to the blue light representative wavelength in the color matching function as a coefficient From the first calculation processing for calculating the photometric amount corresponding to the tristimulus value XYZ for each wavelength of light in the second blue light wavelength range from the first calculation processing, and based on the calculation result of the first calculation processing, Performing a second calculation process for calculating tristimulus values XYZ , and, in the representative wavelength specification process, determining the second red light wavelength range based on the radiation amount for each wavelength of the light within the second red light wavelength range; Identifying the center wavelength of the light in the The barycentric wavelength of the light in the second green light wavelength range is specified based on the radiation amount of each wavelength of the light in the second green light wavelength range as the front wavelength, and the green light representative wavelength is determined. The barycentric wavelength of the light in the second blue light wavelength range is specified based on the radiation amount of each wavelength of the light in the second blue light wavelength range to be the blue light representative wavelength .

According to the second aspect of the present invention, in the measurement apparatus according to the second aspect , the first red light wavelength range of the light output from the red laser, the first green light wavelength range of the light output from the green laser, and the light output from the blue laser From the red laser, a measurement unit for measuring the radiation amount of light within a measurement target wavelength range including each wavelength range of the first blue light wavelength range at a first wavelength interval defined in advance to generate measurement value data; A processing unit for executing a tristimulus value specifying process for specifying tristimulus values XYZ of the combined light of the light from the green laser and the light from the blue laser based on the measurement value data, The processing unit does not include the first green light wavelength range and the first blue light wavelength range based on the measurement value data in the tristimulus value identification process, and includes the first red light wavelength range in advance. Specified second A red light representative wavelength within the color light wavelength range is specified, and a second green light defined in advance not including the first red light wavelength range and the first blue light wavelength range and including the first green light wavelength range A second representative green light wavelength within the light wavelength range is specified, and the first red light wavelength range and the first green light wavelength range are not included, and a second predetermined light wavelength range is included. The value corresponding to the red light representative wavelength in the color matching function is coefficiented based on the representative wavelength specifying process for specifying the blue light representative wavelength in the blue light wavelength range, the specification result of the representative wavelength specifying process, and the measurement value data. Calculate the photometric amount corresponding to the tristimulus value XYZ for each wavelength of the light in the second red light wavelength range from the radiation amount for each wavelength of the light in the second red light wavelength range as , Said green in color matching function The tristimulus value XYZ for each wavelength of light within the second green light wavelength range from the radiation amount for each wavelength of light within the second green light wavelength range using a value corresponding to the light representative wavelength as a coefficient The photometric quantity corresponding to each is calculated, and the value corresponding to the blue light representative wavelength in the color matching function is used as a coefficient to calculate the radiation amount for each wavelength of light within the second blue light wavelength range. (2) A first calculation process for calculating photometric amounts corresponding to tristimulus values XYZ for each wavelength of light within the blue light wavelength range, and a tristimulus value of the combined light based on the calculation result of the first calculation process Performing a second operation process for calculating XYZ, and defining in advance the maximum radiation amount among the radiation amounts for each wavelength of light within the second red light wavelength range in the representative wavelength identification process; Identify the reference radiation amount of The wavelength of light exceeding the amount is averaged to obtain the representative wavelength of red light, and the ratio of the radiation amount for each wavelength of the light within the second green light wavelength range is a ratio defined in advance with respect to the maximum radiation amount The reference radiation amount is specified, and the wavelengths of light exceeding the reference radiation amount are averaged to be the green light representative wavelength, and the maximum among the radiation amounts of each wavelength of light within the second blue light wavelength range A reference radiation amount of a ratio defined in advance with respect to the radiation amount is specified, and wavelengths of light exceeding the reference radiation amount are averaged to be the blue light representative wavelength.

Furthermore, in the measurement apparatus according to claim 3, in the measurement apparatus according to claim 1 or 2 , the processing unit is configured to receive each wavelength of the measurement value data generated by the measurement unit prior to the representative wavelength identification process. The radiation amount of each light is interpolated at a predetermined second wavelength interval narrower than the first wavelength interval, and each process after the representative wavelength identification process using the measured value data including the interpolated radiation amount Run.

Furthermore, in the measurement apparatus according to claim 4, in the measurement apparatus according to any one of claims 1 to 3 , the processing unit is based on the tristimulus value XYZ of the combined light identified by the tristimulus value identification process. Thus, at least a third operation process is performed to calculate the chromaticity of the combined light.

In the measurement method according to claim 5 , the first red light wavelength range of the light output from the red laser, the first green light wavelength range of the light output from the green laser, and the light output from the blue laser The light from the red laser, the green light based on measurement value data obtained by measuring the radiation amount of light within the measurement target wavelength range including each wavelength range of the first blue light wavelength range at each of the previously defined first wavelength intervals In the tristimulus value identification process for identifying tristimulus values XYZ of light from a laser and synthetic light of light from the blue laser, the first green light wavelength range and the first blue light based on the measurement value data A red light representative wavelength within a second red light wavelength range defined in advance and not including the wavelength range and including the first red light wavelength range is specified, and the first red light wavelength range and the first blue light are specified. Wavelength range included And specifying the representative green light wavelength within the second green light wavelength range defined in advance including the first green light wavelength range, the first red light wavelength range and the first green light wavelength range Representative wavelength specifying processing for specifying a blue light representative wavelength within a predetermined second blue light wavelength range which does not include the first blue light wavelength range, and a result of specifying the representative wavelength specifying processing and the measurement based on the value data, within the second red light wavelength range of the radiation of each wavelength of light within the second red light wavelength range using a value corresponding to the red light representative wavelength as a coefficient in the color matching function light in the three metering amount corresponding to the stimulus values XYZ were respectively calculated, the second green light wavelength range using a value corresponding to the green light representative wavelength in the color matching function as a coefficient for each wavelength of light The amount of radiation for each wavelength of Thereby calculating photometric respectively corresponding to the tristimulus values XYZ for each wavelength of light in the second green light wavelength range, the values corresponding to the blue light representative wavelength in the color matching function using the coefficient a (2) a first calculation process for calculating the photometric amount corresponding to the tristimulus value XYZ for each wavelength of light within the second blue light wavelength range from the radiation amount for each wavelength of light within the blue light wavelength range; And performing a second calculation process of calculating the tristimulus value XYZ of the combined light based on the calculation result of the first calculation process, and in the representative wavelength specifying process, each of the light within the second red light wavelength range The barycentric wavelength of light in the second red light wavelength range is specified based on the radiation amount for each wavelength, and the red light representative wavelength is determined as the radiation amount for each wavelength of light in the second green light wavelength range. Identify the center wavelength of light within the second green light wavelength range based on And the center wavelength of the light within the second blue light wavelength range is specified based on the radiation amount of each wavelength of the light within the second blue light wavelength range and the blue light The representative wavelength is used .
In the measurement method according to claim 6, the first red light wavelength range of the light output from the red laser, the first green light wavelength range of the light output from the green laser, and the light output from the blue laser The light from the red laser, the green light based on measurement value data obtained by measuring the radiation amount of light within the measurement target wavelength range including each wavelength range of the first blue light wavelength range at each of the previously defined first wavelength intervals In the tristimulus value identification process for identifying tristimulus values XYZ of light from a laser and synthetic light of light from the blue laser, the first green light wavelength range and the first blue light based on the measurement value data A red light representative wavelength within a second red light wavelength range defined in advance and not including the wavelength range and including the first red light wavelength range is specified, and the first red light wavelength range and the first blue light are specified. Wavelength range included And specifying the representative green light wavelength within the second green light wavelength range defined in advance including the first green light wavelength range, the first red light wavelength range and the first green light wavelength range Representative wavelength specifying processing for specifying a blue light representative wavelength within a predetermined second blue light wavelength range which does not include the first blue light wavelength range, and a result of specifying the representative wavelength specifying processing and the measurement Within the second red light wavelength range from the radiation amount for each wavelength of the light within the second red light wavelength range using the value corresponding to the red light representative wavelength in the color matching function as a coefficient based on the value data Light in the second green light wavelength range by calculating the photometric amount corresponding to the tristimulus value XYZ for each wavelength of each light, using the value corresponding to the green light representative wavelength in the color matching function as a coefficient The amount of radiation for each wavelength of The photometric quantities corresponding to the tristimulus values XYZ for each wavelength of light within the second green light wavelength range are respectively calculated, and the value corresponding to the blue light representative wavelength in the color matching function is used as a coefficient (2) a first calculation process for calculating the photometric amount corresponding to the tristimulus value XYZ for each wavelength of light within the second blue light wavelength range from the radiation amount for each wavelength of light within the blue light wavelength range; And performing a second calculation process of calculating the tristimulus value XYZ of the combined light based on the calculation result of the first calculation process, and in the representative wavelength specifying process, each of the light within the second red light wavelength range A reference radiation amount specified in advance with respect to a maximum radiation amount among radiation amounts for each wavelength is specified, and wavelengths of light exceeding the reference radiation amount are averaged to be the red light representative wavelength, Radiation for each wavelength of light in the 2 green light wavelength range Identifying a reference radiation amount in a proportion defined in advance with respect to the maximum radiation amount among the amounts, averaging the wavelengths of light exceeding the reference radiation amount as the green representative wavelength, and the second blue light Identifying a reference radiation amount in a proportion defined in advance with respect to the maximum radiation amount among the radiation amounts of each wavelength of light within the wavelength range and averaging the wavelengths of light exceeding the reference radiation amount to obtain the blue color The light representative wavelength is used.

In the measurement apparatus according to claims 1 and 2 and the measurement method according to claims 5 and 6 , in the tristimulus value identification process for identifying tristimulus values XYZ of the combined light of light from each laser, the second red light wavelength A representative wavelength specifying process for specifying a red representative wavelength within the range, a green representative wavelength within the second green light wavelength range, and a blue representative wavelength within the second blue light wavelength range, and red light in color matching function corresponding to the tristimulus values XYZ for each wavelength of light in the second red light wavelength range of the radiation of each wavelength of light in the second red light wavelength range using a value corresponding as coefficients representative wavelength calculating photometric respectively, from a radiation amount of each wavelength of light in the second green light wavelength range using a value corresponding to the green light representative wavelength as a coefficient in the color matching functions in the second green light wavelength range The photometric amount corresponding to the tristimulus value XYZ for each wavelength of light While calculating respectively , using the value corresponding to the blue light representative wavelength in the color matching function as a coefficient , the radiation amount of light in the second blue light wavelength range to the light amount in the second blue light wavelength range Executes the first calculation processing to calculate the photometric quantity corresponding to the tristimulus value XYZ for each wavelength and the second calculation processing to calculate the tristimulus value XYZ of the combined light based on the calculation result of the first calculation processing Do.

Therefore, according to the measuring apparatus of claims 1 and 2 and the measuring method of claims 5 and 6 , each wavelength within the second red light wavelength range, the second green light wavelength range and the second blue light wavelength range The red light representative for all wavelengths within the second red light wavelength range compared to the configuration and method of calculating the photometric amount using the value corresponding to each wavelength (color matching function) as a coefficient from the radiation amount for each A value corresponding to a wavelength (color matching function) is used as a coefficient, and a value corresponding to a green light representative wavelength (color matching function) is used as a coefficient for all wavelengths within the second green light wavelength range, and the second blue A wavelength away from each representative wavelength, that is, a value larger than the actual radiation amount, by the value calculated using the value (color matching function) corresponding to the blue representative wavelength for all wavelengths within the light wavelength range as a coefficient Wavelengths that are detected to be It is also possible to calculate a value close to the correct photometric amount. Therefore, accurate tristimulus values XYZ can be calculated for combined light obtained by combining light having a very narrow spectral width.

The measurement apparatus according to claim 1, and according to the measuring method according to claim 5, wherein, in the representative wavelength identifying process, the second red on the basis of the amount of radiation for each wavelength of light in the second red light wavelength range The barycentric wavelength of light in the light wavelength range is specified as a red light representative wavelength, and the barycentric wavelength of light in the second green light wavelength range based on the radiation amount for each wavelength of light in the second green light wavelength range Is specified as the green representative wavelength, and the barycentric wavelength of light within the second blue light wavelength range is specified based on the radiation amount of each wavelength of light within the second blue light wavelength range, and the blue light representative wavelength Since the spectrum of the photometric quantity calculated using the value (color matching function) corresponding to the centroid wavelength as the representative wavelength as a coefficient becomes almost similar to the spectrum of the actual light, An accurate tristimulus value XYZ can be measured based on the quantity.

Further, according to the measuring apparatus of claim 2 and the measuring method of claim 6 , the maximum emission of the radiation amount for each wavelength of light within the second red light wavelength range in the representative wavelength specifying process. Identify the reference radiation amount in a ratio defined in advance with respect to the amount, and average the wavelengths of light exceeding the reference radiation amount as a red light representative wavelength, and emit radiation for each wavelength of light within the second green light wavelength range Identify a reference radiation amount in a predetermined ratio to the maximum radiation amount among the amounts, and average the wavelengths of light exceeding the reference radiation amount as a green representative wavelength, and within the second blue light wavelength range Specify the standard radiation amount in a proportion defined in advance with respect to the maximum radiation amount among the radiation amounts for each wavelength of light, and average the wavelengths of light exceeding the reference radiation amount as the blue light representative wavelength by a value corresponding to the center wavelength of the representative wavelength (equal Spectrum photometric quantity is calculated using the function) as coefficients, to become substantially the same as the spectrum of the actual light can be accurately measured tristimulus values XYZ based on accurate photometric.

Furthermore, according to the measuring apparatus of the third aspect and the measuring method thereof, the radiation amount of the light for each wavelength of the measurement value data generated by the measuring unit prior to the representative wavelength specifying process can be calculated from the first wavelength interval. Each wavelength used to specify the representative wavelength by performing each processing after the representative wavelength identification processing using the measured value data including the interpolated radiation amount and interpolated at a narrow predetermined second wavelength interval. By making the spectrum of the amount of radiation close to the actual spectrum, the representative wavelength can be accurately identified, so each wavelength within the second red light wavelength range, the second green light wavelength range, and the second blue light wavelength range As a result that the photometric quantity corresponding to each tristimulus value XYZ can be calculated more accurately, the tristimulus value XYZ of the combined light can be calculated more accurately.

Furthermore, according to the measuring apparatus of the fourth aspect and the measuring method thereof, the third arithmetic processing of calculating at least the chromaticity of the combined light based on the tristimulus value XYZ of the combined light specified by the three-stimulus value specifying processing By performing this operation, it is possible to calculate the correct chromaticity and luminance based on the correct tristimulus values XYZ . For example, it is accurately determined whether or not the chromaticity of the combined light is the desired chromaticity. can do.

FIG. 1 is a block diagram of a measuring device 1; 10 is a flowchart of measurement processing 10; It is explanatory drawing for demonstrating the relationship between the sensitivity of each light reception sensor, and a detectable wavelength range. It is explanatory drawing for demonstrating the difference of the real value regarding the relationship between the wavelength of the light of measurement object, and relative spectral sensitivity, and a measured value.

  Hereinafter, embodiments of a measuring apparatus and a measuring method will be described with reference to the attached drawings.

The measuring device 1 shown in FIG. 1 is an example of a “measuring device” that measures tristimulus values XYZ or chromaticity of light to be measured according to the “measuring method”, and includes a measuring unit 2, an operation unit 3, a display unit 4, A processing unit 5 and a storage unit 6 are provided.

  In the measurement apparatus 1 of this example, by switching the measurement mode, light (light with a wide spectrum width) from a liquid crystal television or the like is targeted in the same manner as the spectral radiance meter used in the conventional production control method. In this example, the combined light Lrgb (laser light) of the light (laser light) from the red laser 21r, the green laser 21g, and the blue laser 21b in the laser projector 20 is used. An example will be described in which the measurement processing is performed with the combined light Lrgb emitted from the projector 20 and reflected by the screen as an example of the measurement target light). In the following description, the “light emitted from the laser projector 20 and reflected by the screen” is also simply referred to as “light emitted from the laser projector 20” or “light from the laser projector 20”. Furthermore, in FIG. 1, the illustration of the screen is omitted.

  The measuring unit 2 corresponds to a "measuring unit", and is configured and processed in the same manner as, for example, a spectral radiance meter (for example, a polychromator type spectral radiance meter) used in a conventional production control method The measurement processing can be performed under the control of the unit 5. Specifically, as shown in FIG. 4, the measurement unit 2 in the measurement apparatus 1 of the present embodiment has a wavelength range Hr1 of light emitted from the red laser 21 r (an example of “first red light wavelength range”), green The wavelength range Hg1 of the light emitted from the laser 21g (an example of the "first green light wavelength range") and the wavelength range Hb1 of the light emitted from the blue laser 21b (an example of the "first blue light wavelength range") The radiation amount of light within the wavelength range Hm (an example of “measurement target wavelength range” in the present example: 400 nm to 700 nm range) is included at a wavelength interval of 5 nm (an example of “predetermined first wavelength interval”) Each measurement is configured to be able to generate measurement value data D1. The detailed structure of the measurement unit 2 (spectral radiance meter) is known and will not be illustrated and described.

  The operation unit 3 includes various operation switches for setting operation of conditions of various processes described later and instructing start / stop of the process, and outputs an operation signal according to the switch operation to the processing unit 5. The display unit 4 displays various display screens such as a measurement result display screen (not shown) according to the control of the processing unit 5.

The processing unit 5 controls the measuring device 1 generally. The processing unit 5 is an example of the “processing unit”, and executes the measurement processing 10 shown in FIG. 2 to measure the tristimulus value XYZ of the combined light Lrgb, the chromaticity, and the luminance. Specifically, the processing unit 5 controls the measuring unit 2 to measure the radiation amount for each wavelength in the wavelength range Hm. The processing unit 5 also performs interpolation processing on the measurement value data D1 generated by the measurement unit 2 to generate measurement value data D2. Furthermore, based on the generated measurement value data D2, the processing unit 5 determines the photometric amount (a value corresponding to the tristimulus value XYZ for each wavelength of light within the second red light wavelength range, within the second green light wavelength range). A value corresponding to the tristimulus value XYZ for each wavelength of light and a value corresponding to the tristimulus value XYZ for each wavelength of light within the second blue light wavelength range are calculated to generate measurement value data D3. At the same time, the tristimulus value XYZ of the combined light Lrgb is specified based on the generated measurement value data D3. Further, the processing unit 5 specifies the chromaticity and the luminance of the combined light Lrgb based on the specified tristimulus values XYZ , and executes a process of generating measurement result data D4 indicating the specified result. The storage unit 6 stores an operation program of the processing unit 5 and the measurement value data D1 to D3 and the measurement result data D4.

In the measurement of the tristimulus values XYZ , the chromaticity, and the like by the measuring device 1, the measuring device 1 is first installed at a position where the image projected on the screen can be observed by the laser projector 20, as an example. At this time, the combined light Lrgb (combined light Lrgb reflected on the screen) of the light from the red laser 21r, the green laser 21g and the blue laser 21b (hereinafter, also referred to as "laser 21" when they are not distinguished) is measured. The light receiving surface is directed to the screen so as to be incident on the light receiving unit of the unit 2.

  Next, the power of the laser projector 20 is turned on to project a white balance adjustment image (as one example, a white image uniform over the entire projection area: hereinafter, this image is also referred to as an “adjustment image”). Start it. At this time, light of the spectrum shown by the solid line 70ra in FIG. 4 is emitted from the red laser 21r, and light of the spectrum shown by the solid line 70ga is emitted from the green laser 21g. Light is emitted.

  In this state, when the start of the process is instructed by the operation of the operation unit 3, the processing unit 5 starts the measurement process 10 shown in FIG. In the measurement process 10, the processing unit 5 first controls the measurement unit 2 to measure the radiation amount for each wavelength in the wavelength range Hm (step 11). At this time, the radiation amount for each wavelength is measured as a value such as a spectrum shown by broken lines 70rb, 70gb, 70bb in FIG. 4, and measurement value data D1 indicating the measurement value is output from measurement unit 2. . Further, the processing unit 5 causes the storage unit 6 to store the measurement value data D1 output from the measurement unit 2.

  Next, prior to “representative wavelength identification processing” in step 13 described later, the processing unit 5 executes interpolation processing to interpolate each measurement value of the measurement value data D1 (step 12). Specifically, the processing unit 5 sets the radiation amount of the light for each wavelength of the measurement value data D1 generated by the measurement unit 2 to a wavelength interval (0. 1) smaller than 5 nm interval as “first wavelength interval”. Wavelength interval within the range of 05 nm to 0.5 nm: as an example, 0.1 nm interval: linear interpolation according to a known interpolation method with “predefined second wavelength interval”) The value data D2 is generated and stored in the storage unit 6.

Subsequently, the processing unit 5 specifies the representative wavelength of red light measured by the measurement unit 2, the representative wavelength of green light, and the representative wavelength of blue light based on the measured value data D2 generated in step 12 respectively. (An example of “representative wavelength identification processing”), values corresponding to each representative wavelength in the color matching function are respectively identified (step 13). In this case, in the measurement apparatus 1 of this example, as shown in FIG. 4, the wavelength range Hr1 of the light emitted from the red laser 21r of the laser projector 20, the wavelength range Hg1 of the light emitted from the green laser 21g, and the blue Wavelength ranges Hr2, Hg2, and Hb2 for referring to the radiation amount when specifying the representative wavelength are defined in advance according to the wavelength range Hb1 of the light emitted from the laser 21b.

  Specifically, the wavelength range Hr2 is an example of the “second red light wavelength range”, and the wavelength range Hg1 as the “first green light wavelength range”, and the wavelengths as the “first blue light wavelength range” It is specified not to include the range Hb1 and to include the wavelength range Hr1 as the “first red light wavelength range”. The wavelength range Hg2 is an example of the “second green light wavelength range”, and is defined so as not to include the wavelength ranges Hr1 and Hb1 and to include the wavelength range Hg1. Furthermore, the wavelength range Hb2 is an example of the “second blue light wavelength range”, and is defined so as not to include the wavelength ranges Hr1 and Hg1 and to include the wavelength range Hb1.

  Further, the processing unit 5 identifies the “centroid wavelength” of the light in the wavelength range Hr2 based on the radiation amount of each wavelength of the light in the wavelength range Hr2, and determines the identified wavelength as a representative wavelength of red light Example of “optical representative wavelength”. Furthermore, the processing unit 5 identifies the “centroid wavelength” of the light within the wavelength range Hg2 based on the radiation amount of each wavelength within the wavelength range Hg2, and identifies the identified wavelength as a representative wavelength of green light (“green Example of “optical representative wavelength”. In addition, the processing unit 5 identifies the “centroid wavelength” of the light in the wavelength range Hb2 based on the radiation amount of each wavelength of the light in the wavelength range Hb2, and identifies the identified wavelength as a representative wavelength of blue light (“blue wavelength Example of “optical representative wavelength”.

In this case, (in this example, the wavelength range Hr2, Hg2, Hb2) wavelength range of interest to identify the centroid of each in the range of "lambda ₁ to [lambda] _2", the "lambda ₁ to [lambda] _2" in the measurement data D2 Assuming that the wavelength interval (0.1 nm in this example) in the range is “dλ” and the radiation amount for each wavelength “λ” is “τ (λ)”, the processing unit 5 is, for example, The barycentric wavelength (the barycentric wavelength) “λg” is calculated according to the following equation [Equation 1].

Thus, the “representative wavelength specification process” is completed, and “red light representative wavelength: λrg”, “green light representative wavelength: λgg”, and “blue light representative wavelength: λbg” are specified. The processing unit 5, "red light representative wavelength: Ramudarg" in the color matching function corresponding value, "blue light representative" green light representative wavelength "λgg" to the corresponding value, and the color matching function in a color matching function The values corresponding to the wavelength “λbg” are specified respectively.

Next, the processing unit 5 uses the measured value data D2 and the values (color matching functions) for each “representative wavelength: λrg, λgg, λbg” in the color matching function specified in step 13 as coefficients to be measured values. Based on the radiation amount for each wavelength in the wavelength range Hr2, Hg2 and Hb2 in the data D2, the photometric amount corresponding to the tristimulus value XYZ for each wavelength in the wavelength range Hr2, Hg2 and Hb2 is calculated respectively (“1st "Example of operation processing": Step 14) The operation result is stored in the storage unit 6 as the measured value data D3. In this case, in the measurement apparatus 1 of this example, for example, “representative wavelength of red light: λrg” in the color matching function for each wavelength from the shortest wavelength in the wavelength range Hr2 to the longest wavelength in the wavelength range Hr2. arrangement for calculating a photometric value from the radiation amount using a value corresponding the coefficient is employed to.

Therefore, in the measurement apparatus 1 of this example, a wavelength larger than the actual radiation amount is detected due to the influence of the “red light representative wavelength: λrg” (that is, the “spectrum width spread” described above). Relative to the configuration in which the photometric amount is calculated from the radiation amount using the value (color matching function) corresponding to the wavelength as a coefficient , a relatively large value for all wavelengths in the wavelength range Hr2 The amount of radiation of the red light representative wavelength that is being measured is calculated using the value (color matching function) corresponding to "red light representative wavelength: λrg (wavelength representative of the wavelength range Hr2)" as a factor. As a result, each photometric quantity to be calculated has a value close to the spectrum of the light actually emitted from the red laser 21r.

The photometric quantities corresponding to the tristimulus values XYZ for each wavelength in the wavelength range Hg2 are also close to the spectrum of the light actually emitted from the green laser 21g in the same manner as the photometric quantities in the wavelength range Hr2. The photometric quantities corresponding to the tristimulus values XYZ for each wavelength in the wavelength range Hb2 are actually the same as the photometric quantities in the wavelength ranges Hr2 and Hg2 of the light actually emitted from the blue laser 21b. It becomes a value close to the spectrum.

Subsequently, the processing unit 5 calculates the tristimulus value XYZ of the combined light Lrgb of the light emitted from the laser projector 20 (each of the lasers 21 r, 21 g, 21 b) based on the photometric quantity for each wavelength (“second Execution of operation processing: step 15). The method of calculating the tristimulus value XYZ of the combined light Lrgb from the photometric quantity corresponding to the tristimulus value XYZ for each wavelength is publicly known, and thus the detailed description is omitted. In this case, in the measurement apparatus 1 of this example, the photometric quantity corresponding to the tristimulus values XYZ for each wavelength calculated in step 14 is a spectrum close to the spectrum of the light actually emitted from the laser projector 20. Since (the correct photometric amount is calculated), the tristimulus value XYZ calculated in this step 15 is also an accurate value. Thus, the "tristimulus value identification process" is completed.

Next, the processing unit 5 calculates the chromaticity and the luminance of the combined light Lrgb based on the calculated tristimulus values XYZ (an example of the “third calculation process”: step 16), and the calculation results (the chromaticity and the luminance) ) Is stored in the storage unit 6 as the measurement result data D4 together with the tristimulus values XYZ calculated in step 15, and then this measurement processing 10 is ended. In addition, about the method to calculate a chromaticity and a brightness | luminance from tristimulus value XYZ, since it is well-known, detailed description is abbreviate | omitted. In this case, in the measurement apparatus 1 of this example, since the tristimulus values XYZ calculated in step 15 are accurate values, the chromaticity and luminance calculated in step 16 are also accurate values. .

Specifically, for example, when measuring the chromaticity of light from a white LED using a spectral radiance meter used in a conventional production control method, measurement results for each wavelength by the spectral radiance meter A photometric quantity corresponding to the tristimulus value XYZ for each wavelength is calculated from (radiation quantity) using a value corresponding to each wavelength in the color matching function as a coefficient , and based on the photometric quantity, the white LED When the tristimulus values XYZ of light (combined light of light of each wavelength emitted from the white LED) are calculated to calculate the chromaticity, the error of the absolute value of the chromaticity is about 0.0005 at the maximum.

Also, when measuring the chromaticity of the combined light Lrgb of the light from the red laser 21r, the green laser 21g, and the blue laser 21b using the spectral radiance meter used in the conventional production control method, the spectral radiance meter calculated from the measurement results of each wavelength (radiation amount), the photometric quantity corresponding to the tristimulus values XYZ for each wavelength using the corresponding values to the respective wavelengths as a coefficient in the color matching functions by, the photometric When the chromaticity is calculated by calculating the tristimulus value XYZ of the combined light Lrgb based on the above, it is confirmed that the error of the absolute value of the chromaticity is about 0.0020 at the maximum.

Furthermore, for example, the central wavelength of the wavelength range Hr2, the central wavelength of the wavelength range Hg2, and the central wavelength of the wavelength range Hb2 are respectively referred to as "red representative wavelength", "green representative wavelength" and "blue representative wavelength". In the configuration and method described above, each wavelength in the wavelength range Hg2 when the peak of the spectrum at the radiation amount for each wavelength in the wavelength range Hr2 deviates from the central wavelength (representative wavelength of red light) of the wavelength range Hr2. When the peak of the spectrum at each radiation amount deviates from the central wavelength (green light representative wavelength) of the wavelength range Hg2, and the peak of the spectrum at the radiation amount for each wavelength in the wavelength range Hb2 is the wavelength range Hb2 in a state shifted from the center wavelength (blue light representative wavelength), the three thorns for each wavelength that is calculated using a value corresponding to each "representative wavelength" (color matching functions) as coefficients Spectrum photometric amount corresponding to the value XYZ is, since a state that differs from the spectrum of the actual light, accurately becomes difficult to measure the tristimulus values XYZ of the combined light Lrgb, the error of the absolute value of the chromaticity Is a somewhat large value.

On the other hand, in the measuring apparatus 1 of this example, when measuring the chromaticity of the combined light Lrgb of the light from the red laser 21r, the green laser 21g and the blue laser 21b, it is used in the conventional production control method Although the measurement results of the measurement unit 2 configured similarly to the spectral radiance meter are used, from the measurement results (radiation amount) for each wavelength by the measurement unit 2, “the representative wavelength (in the color matching function centroid wavelength): λrg, λgg, by calculating the photometric quantity corresponding to the tristimulus values XYZ for each wavelength using a value corresponding as coefficients λbg ", the vertex in the spectrum of radiation of each wavelength Even if it exists in any position within the wavelength range Hr2, Hg2, Hb2, it is possible to calculate an accurate photometric quantity. As a result, when the chromaticity is calculated by calculating the tristimulus value XYZ of the combined light Lrgb based on the photometric quantity, the error of the absolute value of the chromaticity may be very small at about 0.0005 at the maximum. It has been confirmed.

As described above, in this measurement apparatus 1 and the measurement method thereof, red light representative within the wavelength range Hr2 in the “tristimulus value identification process” of identifying the tristimulus value XYZ of the combined light Lrgb of the light from each laser 21 Wavelength: λrg, green light representative wavelength in the wavelength range Hg2: λgg, and blue light representative wavelength in the wavelength range Hb2: “representative wavelength specification processing” for specifying λbg, and red light representative wavelength in the color matching function: λrg photometric quantity corresponding to the tristimulus values XYZ for each wavelength of light in the wavelength range Hr2 from the radiation amount of each wavelength of light in the wavelength range Hr2 using the values corresponding as coefficient calculation respectively, etc. Green light representative wavelength in the color function: using the value corresponding to λgg as a coefficient , the radiation amount for each wavelength of light within the wavelength range Hg2 to the phase of tristimulus values XYZ for each wavelength of light within the wavelength range Hg2 Thereby calculating equivalent metering the amount of the respective blue light representative wavelength in a color matching function: Ramudabg using the value that corresponds as a coefficient to the amount of radiation for each wavelength of light in the wavelength range Hb2 in the wavelength range Hb2 light Calculate the tristimulus value XYZ of the combined light Lrgb based on the calculation result of the “first calculation process” which calculates the photometric quantity corresponding to the tristimulus value XYZ for each wavelength and the “first calculation process” The second operation process is performed.

Therefore, according to this measuring device 1 and its measuring method, the wavelength ranges Hr2, Hg2. As compared with the configuration and method of calculating the photometric amount using the value corresponding to each wavelength (color matching function) as a coefficient from the radiation amount for each wavelength in Hb2, the wavelength ranges Hr2, Hg2. Representative wavelengths for all wavelengths in Hb2: Wavelengths separated from representative wavelengths: λrg, λgg, λbg, ie, actually, by using values (color matching functions) corresponding to λrg, λgg, λbg as coefficients It is possible to calculate a value close to an accurate photometric amount even for a wavelength that is detected to be a radiation amount of a value larger than the radiation amount of. For this reason, accurate tristimulus values XYZ can be calculated for combined light Lrgb obtained by combining light having a very narrow spectral width.

Further, according to the measurement apparatus 1 and the measurement method thereof, in the “representative wavelength specification process”, the “centroid wavelength” of the light within the wavelength range Hr2 based on the radiation amount for each wavelength of the light within the wavelength range Hr2. Is specified as the red light representative wavelength: λrg, and based on the radiation amount for each wavelength of light within the wavelength range Hg 2, the “center of gravity wavelength” of the light within the wavelength range Hg 2 is specified and the green light representative wavelength: λgg By specifying the "centre wavelength" of the light in the wavelength range Hb2 based on the radiation amount of each wavelength in the wavelength range Hb2 and setting it as a blue light representative wavelength: λbg, as a "representative wavelength" Since the spectrum of the photometric quantity calculated using the value (color matching function) corresponding to the "center of gravity wavelength" as a coefficient becomes almost the same as the spectrum of the actual light, accurate three of the three based on the correct photometric quantity it is possible to measure the stimulus value XYZ .

Furthermore, according to the measurement apparatus 1 and the measurement method thereof, the radiation amount of light for each wavelength of the measurement value data D1 generated by the measurement unit prior to the "representative wavelength specification process" (In this example, interpolation is performed at a predetermined "second wavelength interval (in this example, 0.1 nm interval)" narrower than "5 nm interval"), and measurement value data D2 including the interpolated radiation amount is used. By performing each processing after “representative wavelength identification processing”, the “representative wavelength” can be accurately identified by bringing the spectrum of the radiation amount for each wavelength used to identify the “representative wavelength” closer to the actual spectrum. it is possible, the wavelength range Hr2, Hg2, the photometric quantity corresponding to the tristimulus values XYZ for each wavelength in Hb2 can be more accurately calculated results, the tristimulus values XYZ of the combined light Lrgb more accurately Calculate Can.

Furthermore, according to the measuring apparatus 1 and the measuring method thereof, the chromaticity and the luminance of the combined light Lrgb are calculated based on the three stimulus values XYZ of the combined light Lrgb specified by the “three-stimulus value specifying process”. By performing “calculation processing”, accurate chromaticity and luminance can be calculated based on accurate tristimulus values XYZ . For example, it is determined whether the chromaticity of the combined light Lrgb is a desired chromaticity or not. It is possible to judge exactly.

  The specific configuration of the “measuring device” and the specific procedure of the “measuring method” are not limited to the above-described configuration of the measuring device 1 and an example of the procedure of the measuring method by the measuring device 1. For example, in the “representative wavelength specification process”, “center of gravity wavelength” in the wavelength range Hr2 is “red representative wavelength: λrg”, “center of gravity wavelength” in the wavelength range Hg2 is “green representative wavelength: λgg”, And although the structure and method which set "the gravity center wavelength" in the wavelength range Hb2 to "blue light representative wavelength: λbg" were mentioned as an example and explained, each "representation wavelength" is not limited to the "gravity center wavelength".

For example, instead of the process of step 12 in the measurement process 10 described above, a ratio defined in advance with respect to the maximum amount of radiation (peak amount of radiation) of the radiation amount for each wavelength of light within the wavelength range Hr2. A wavelength (hereinafter also referred to as a “central wavelength”) obtained by specifying “a reference radiation amount (for example, a radiation amount of 50% of the peak radiation amount)” and averaging wavelengths of light exceeding the specified “reference radiation amount” As “red representative wavelength: λrg”. In addition, the radiation amount of 50% of the peak radiation amount in the radiation amount for each wavelength of light within the wavelength range Hg2 is specified as the “reference radiation amount”, and the wavelength of light exceeding the “reference radiation amount” The average “central wavelength” is “green representative wavelength: λgg”, and 50% of the amount of peak radiation in the amount of radiation for each wavelength of light in the wavelength range Hb2 is “reference radiation” While specifying, the "center wavelength" which averaged the wavelength of the light exceeding the "reference radiation amount" is made into "blue light representative wavelength: (lambda) bg." After this, using the values (color matching functions) corresponding to the specified "representative wavelengths: λrg, λgg, λbg" as coefficients, the tristimulus for each wavelength is determined from the radiation amount specified based on the measurement value data D2 The processing of step 13 and subsequent steps for calculating the photometric amount corresponding to the value XYZ is executed. The “reference radiation dose” is not limited to 50% of the radiation dose with respect to the peak radiation dose, and any ratio of the radiation dose with respect to the peak radiation dose can be the “reference radiation dose”.

According to the “measuring device” having such a configuration and the “measuring method”, the value corresponding to the “central wavelength” as the “representative wavelength” (the same as the measuring device 1 and the measuring method described above The spectrum of the photometric quantity calculated using the color matching function as a coefficient is almost the same as the spectrum of the actual light, so that the accurate tristimulus values XYZ can be measured based on the correct photometric quantity .

Also, instead of the process of step 12 in the above measurement process 10, the wavelength of the maximum radiation amount (peak radiation amount) among the radiation amounts for each wavelength of light within the wavelength range Hr2 (hereinafter, "peak wavelength" (Also referred to as “red representative wavelength: λrg”), the wavelength (peak wavelength) of the peak radiation amount in the emission amount of each wavelength of light within the wavelength range Hg 2 as “green representative wavelength: λgg”, And let the wavelength (peak wavelength) of the peak radiation amount in the radiation amount for each wavelength of the light within the wavelength range Hb2 be “blue representative wavelength: λbg”. After this, using the values (color matching functions) corresponding to the specified "representative wavelengths: λrg, λgg, λbg" as coefficients, the tristimulus for each wavelength is determined from the radiation amount specified based on the measurement value data D2 The processing of step 13 and subsequent steps for calculating the photometric amount corresponding to the value XYZ is executed.

According to the “measuring device” having such a configuration and the “measuring method”, the value corresponding to the “peak wavelength” as the “representative wavelength” (the same as the measuring device 1 and the measuring method described above The spectrum of the photometric quantity calculated using the color matching function as a coefficient is almost the same as the spectrum of the actual light, so that the accurate tristimulus values XYZ can be measured based on the correct photometric quantity .

  In addition, prior to the “representative wavelength identification process” in step 12, the measurement value data D1 generated by the measurement unit 2 is interpolated to generate the measurement value data D2, and the generated measurement value data D2 is used to generate the “representation wavelength For example, when the wavelength interval at the time of measurement processing by the “measurement unit” is sufficiently narrow, the “configuration unit” generates “the measurement unit”. It is also possible to adopt a configuration and method of executing each processing after the “representative wavelength identification processing” by using the “measurement value data” as it is without interpolation.

Furthermore, the configuration and method of specifying (calculating) the chromaticity and luminance of the combined light Lrgb based on the tristimulus values XYZ specified (computed) by the “tristimulus value specifying process” have been described as an example. The configuration and method (specifying / calculating) only the chromaticity of the combined light Lrgb based on the tristimulus value XYZ (configuration / method not specifying the brightness), only the brightness of the combined light Lrgb is specified based on the tristimulus value XYZ It is also possible to adopt a configuration / method (configuration / method not specifying the chromaticity) and a configuration / method not specifying the chromaticity or luminance of the combined light Lrgb based on the tristimulus value XYZ .

  In addition, although the example provided with the measurement unit 2 configured similarly to the polychromatic meter radiance meter has been described, the “measurement unit” configured similarly to the monochromator spectral radiance meter is configured You can also.

DESCRIPTION OF SYMBOLS 1 measurement device 2 measurement unit 3 operation unit 4 display unit 5 processing unit 6 storage unit 10 measurement processing 20 laser projector 21 r red laser 21 g green laser 21 b blue laser 50 a, 60 a, 70 ra, 70 ga, 70 ba solid line 50 b one-dot chain line 50 c two dot chain line 60b, 70rb, 70gb, 70bb dashed line D1 to D3 measurement value data D4 measurement result data Hr1, Hg1, Hb1, Hr2, Hg2, Hb2, Hm wavelength range Lrgb synthetic light

Claims (6)

Each wavelength range of the first red light wavelength range of the light output from the red laser, the first green light wavelength range of the light output from the green laser, and the first blue light wavelength range of the light output from the blue laser A measurement unit for measuring the radiation amount of light within the measurement target wavelength range including each at a first wavelength interval defined in advance to generate measurement value data;
A processing unit that executes tristimulus value identification processing for identifying tristimulus values XYZ of the light from the red laser, the light from the green laser, and the combined light of the lights from the blue laser based on the measurement value data; equipped with a,
The processing unit does not include the first green light wavelength range and the first blue light wavelength range based on the measurement value data in the tristimulus value identification process, and includes the first red light wavelength range. Specifying a red light representative wavelength within a second red light wavelength range defined in advance, not including the first red light wavelength range and the first blue light wavelength range, and including the first green light wavelength range While specifying a green light representative wavelength within a second green light wavelength range defined in advance, the first red light wavelength range and the first green light wavelength range are not included, and the first blue light wavelength range is included. And a representative wavelength specifying process for specifying a blue light representative wavelength within the second blue light wavelength range defined in advance, and the red light representative in the color matching function based on the specified result of the representative wavelength specifying process and the measurement value data. corresponding to a wavelength Each used as coefficients in the second red light wavelength range light photometric quantity corresponding to the tristimulus values XYZ for each wavelength of light within the second red light wavelength range of the radiation of each wavelength calculated, light in the second green light wavelength range of the radiation of each wavelength of light within the second green light wavelength range using a value corresponding to the green light representative wavelength as a coefficient in the color matching function The photometric quantities corresponding to the tristimulus values XYZ for each wavelength of each are respectively calculated, and the value corresponding to the blue light representative wavelength in the color matching function is used as a factor as a coefficient of light of the second blue light wavelength range In the first calculation processing for calculating the photometric amount corresponding to the tristimulus value XYZ for each wavelength of light in the second blue light wavelength range from the radiation amount for each wavelength, and the calculation result of the first calculation processing based, first calculates the tristimulus values XYZ of the combined light Run the arithmetic processing, at the representative wavelength identifying process, identifies the centroid wavelength of light within the second red light wavelength range based on the amount of radiation for each wavelength of light within the second red light wavelength range And the center wavelength of light within the second green light wavelength range is specified based on the radiation amount of each wavelength of light within the second green light wavelength range, and the green light representative wavelength And a measuring device for specifying the barycentric wavelength of the light in the second blue light wavelength range based on the radiation amount of each wavelength of the light in the second blue light wavelength range as the blue light representative wavelength . Each wavelength range of the first red light wavelength range of the light output from the red laser, the first green light wavelength range of the light output from the green laser, and the first blue light wavelength range of the light output from the blue laser A measurement unit for measuring the radiation amount of light within the measurement target wavelength range including each at a first wavelength interval defined in advance to generate measurement value data;
A processing unit that executes tristimulus value identification processing for identifying tristimulus values XYZ of the light from the red laser, the light from the green laser, and the combined light of the lights from the blue laser based on the measurement value data; equipped with a,
The processing unit does not include the first green light wavelength range and the first blue light wavelength range based on the measurement value data in the tristimulus value identification process, and includes the first red light wavelength range. Specifying a red light representative wavelength within a second red light wavelength range defined in advance, not including the first red light wavelength range and the first blue light wavelength range, and including the first green light wavelength range While specifying a green light representative wavelength within a second green light wavelength range defined in advance, the first red light wavelength range and the first green light wavelength range are not included, and the first blue light wavelength range is included. And a representative wavelength specifying process for specifying a blue light representative wavelength within the second blue light wavelength range defined in advance, and the red light representative in the color matching function based on the specified result of the representative wavelength specifying process and the measurement value data. corresponding to a wavelength Each used as coefficients in the second red light wavelength range light photometric quantity corresponding to the tristimulus values XYZ for each wavelength of light within the second red light wavelength range of the radiation of each wavelength calculated, light in the second green light wavelength range of the radiation of each wavelength of light within the second green light wavelength range using a value corresponding to the green light representative wavelength as a coefficient in the color matching function The photometric quantities corresponding to the tristimulus values XYZ for each wavelength of each are respectively calculated, and the value corresponding to the blue light representative wavelength in the color matching function is used as a coefficient as a factor of light within the second blue light wavelength range. In the first calculation processing for calculating the photometric amount corresponding to the tristimulus value XYZ for each wavelength of light in the second blue light wavelength range from the radiation amount for each wavelength, and the calculation result of the first calculation processing based, first calculates the tristimulus values XYZ of the combined light Run the arithmetic processing, at the representative wavelength specific process, reference radiation amount of pre-defined percentage of the maximum amount of radiation among the radiation dose for each wavelength of light within the second red light wavelength range And the wavelength of light exceeding the reference radiation amount is averaged to be the red light representative wavelength, and the maximum radiation amount among the radiation amounts for each wavelength of light within the second green light wavelength range is determined. And a wavelength of light exceeding the reference radiation amount is averaged to be the green light representative wavelength, and for each wavelength of light within the second blue light wavelength range A measuring device for specifying a reference radiation amount of a ratio defined in advance with respect to the maximum radiation amount among radiation amounts and averaging wavelengths of light exceeding the reference radiation amount as the blue light representative wavelength . The processing unit, prior to the representative wavelength identification processing, the second predetermined emission amount of the light of each wavelength of the measurement value data generated by the measurement unit is narrower than the first wavelength interval. The measuring apparatus according to claim 1 or 2, wherein each processing after the representative wavelength specifying processing is executed using the measurement value data including the radiation amount interpolated and interpolated at the wavelength interval. Wherein the processing unit any one of claims 1 to 3 for executing a third arithmetic processing for calculating the chromaticity of at least the combined light based on the tristimulus values XYZ of the combined light identified by the tristimulus values specifying process Measuring device described in. Each wavelength range of the first red light wavelength range of the light output from the red laser, the first green light wavelength range of the light output from the green laser, and the first blue light wavelength range of the light output from the blue laser The light from the red laser, the light from the green laser, and the light from the blue laser, based on the measurement value data obtained by measuring the radiation amount of light within the measurement target wavelength range including each at the first wavelength interval defined in advance. In a tristimulus value identification process for identifying a tristimulus value XYZ of combined light of light, the first green light wavelength range and the first blue light wavelength range are not included based on the measurement value data, and the first red light wavelength range is not included. A red light representative wavelength within a predetermined second red light wavelength range including a light wavelength range is specified, and the first red light wavelength range and the first blue light wavelength range are not included, and the first green light wavelength range is included. Light wavelength range While specifying a green light representative wavelength within a second green light wavelength range defined in advance and including, and not including the first red light wavelength range and the first green light wavelength range, the first blue light wavelength range And the red light in the color matching function based on the representative wavelength identification processing for identifying the blue light representative wavelength in the second blue light wavelength range defined in advance and the identification result of the representative wavelength identification processing and the measurement value data. tristimulus values XYZ for each wavelength of light within the second red light wavelength range of the radiation of each wavelength of light within the second red light wavelength range using a value corresponding to the light representative wavelength as a coefficient corresponding to the photometric quantity calculated respectively, the second from the radiation amount of each wavelength of light within the second green light wavelength range using a value corresponding to the green light representative wavelength in the color matching function as a coefficient Each wave of light in the green light wavelength range Photometric quantity corresponding to the tristimulus values XYZ as well as calculating the respective each, the color matching function the blue light representative wavelength using a value corresponding as a coefficient for each wavelength of light within the second blue light wavelength range of A first calculation process for calculating a photometric amount corresponding to the tristimulus value XYZ for each wavelength of light in the second blue light wavelength range from the radiation amount of the second blue light wavelength range, and the calculation result of the first calculation process; And performing a second calculation process for calculating a tristimulus value XYZ of the combined light , wherein, in the representative wavelength specifying process, the second red light is calculated based on the radiation amount for each wavelength of the light within the second red light wavelength range. The barycentric wavelength of the light in the light wavelength range is specified to be the representative wavelength of the red light, and the light in the second green light wavelength range based on the radiation amount for each wavelength of the light in the second green light wavelength range. Identifying the centroid wavelength of the green light as the representative wavelength of the green light, and The measuring method which specifies the barycentric wavelength of the light in the said 2nd blue light wavelength range based on the radiation amount for every wavelength of the light in the said 2nd blue light wavelength range, and uses it as the said blue light representative wavelength . Each wavelength range of the first red light wavelength range of the light output from the red laser, the first green light wavelength range of the light output from the green laser, and the first blue light wavelength range of the light output from the blue laser The light from the red laser, the light from the green laser, and the light from the blue laser, based on the measurement value data obtained by measuring the radiation amount of light within the measurement target wavelength range including each at the first wavelength interval defined in advance. In a tristimulus value identification process for identifying a tristimulus value XYZ of combined light of light, the first green light wavelength range and the first blue light wavelength range are not included based on the measurement value data, and the first red light wavelength range is not included. A red light representative wavelength within a predetermined second red light wavelength range including a light wavelength range is specified, and the first red light wavelength range and the first blue light wavelength range are not included, and the first green light wavelength range is included. Light wavelength range While specifying a green light representative wavelength within a second green light wavelength range defined in advance and including, and not including the first red light wavelength range and the first green light wavelength range, the first blue light wavelength range And the red light in the color matching function based on the representative wavelength identification processing for identifying the blue light representative wavelength in the second blue light wavelength range defined in advance and the identification result of the representative wavelength identification processing and the measurement value data. tristimulus values XYZ for each wavelength of light within the second red light wavelength range of the radiation of each wavelength of light within the second red light wavelength range using a value corresponding to the light representative wavelength as a coefficient corresponding to the photometric quantity calculated respectively, the second from the radiation amount of each wavelength of light within the second green light wavelength range using a value corresponding to the green light representative wavelength in the color matching function as a coefficient Each wave of light in the green light wavelength range Photometric quantity corresponding to the tristimulus values XYZ as well as calculating the respective each, the color matching function the blue light representative wavelength using a value corresponding as a coefficient for each wavelength of light within the second blue light wavelength range of A first calculation process for calculating a photometric amount corresponding to the tristimulus value XYZ for each wavelength of light in the second blue light wavelength range from the radiation amount of the second blue light wavelength range, and the calculation result of the first calculation process; Performing a second calculation process for calculating the tristimulus value XYZ of the combined light, and in the representative wavelength specifying process, the maximum radiation amount among the radiation amounts for each wavelength of the light within the second red light wavelength range; And the wavelength of light exceeding the reference radiation amount is averaged to obtain the representative wavelength of red light, and each wavelength of light within the second green light wavelength range Against the maximum radiation dose of And the wavelength of light exceeding the reference radiation amount is averaged to be the green representative wavelength, and radiation for each wavelength of light within the second blue light wavelength range A measuring method of specifying a reference radiation amount of a ratio defined in advance with respect to the maximum radiation amount among the amounts and averaging wavelengths of light exceeding the reference radiation amount to be the blue light representative wavelength .

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