WO2014092024A1 - 紫外線防御効果の評価方法及び評価装置並びに記録媒体 - Google Patents
紫外線防御効果の評価方法及び評価装置並びに記録媒体 Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N2201/12—Circuits of general importance; Signal processing
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Definitions
- the present invention relates to an evaluation method, an evaluation apparatus, and a recording medium for an ultraviolet protection effect.
- SPF Silicon Protection Factor
- the time-dependent change of the spectral transmission spectrum of the measurement sample in a predetermined wavelength region is measured at a predetermined wavelength interval, and based on the time-dependent change of the measured spectral transmission spectrum, the light irradiation time, A correlation with the erythema effect amount in a predetermined time unit obtained by dividing the erythema effect amount per MED from the erythema effect amount of the measurement sample is set, and the cumulative erythema effect amount obtained by time integration from the set correlation is 1 MED.
- the in vitro SPF prediction value of the measurement sample is calculated according to the time until it reaches
- the integrating sphere when an integrating sphere is used to collect the light transmitted through the portion of the application member where the sample is applied (sample application portion), the integrating sphere has a low light collection efficiency.
- a highly sensitive photomultiplier tube or the like must be used for the detector.
- the amplification factor of the photomultiplier tube is sequentially changed to expand the dynamic range.
- a predetermined stable period is required after the change. For this reason, in the conventional method, for example, it may take a long time of about 2 minutes to acquire one spectrum.
- the spectral radiant intensity of the light source for spectral transmittance measurement has less wavelength dependency.
- the spectral radiant intensity of the light source for ultraviolet irradiation is highly wavelength-dependent due to the necessity of having properties as pseudo-sunlight, and the spectral radiant intensity is very small on the short wavelength side of the measurement range.
- the spectral radiation intensity of the ultraviolet light source for the sample coating portion and the light source for spectral transmittance measurement are combined. Therefore, on the short wavelength side of the measurement range where the spectral radiation intensity is very small, there is a possibility that the accuracy of the spectral transmittance measurement is deteriorated with a dark sample having a small transmittance.
- an object of the present invention is to evaluate the ultraviolet protection effect with high accuracy in a short time.
- the method for evaluating the ultraviolet protection effect of a measurement sample applied to a coating member is the measurement in a predetermined wavelength region by light irradiation of a light source including ultraviolet light under a predetermined light irradiation condition.
- a second step of measuring the spectral transmittance by switching the second filter to the first filter after irradiating the measurement sample with ultraviolet rays for a predetermined time to cause photodegradation.
- a third step of evaluating the ultraviolet protection effect based on a temporal change in the spectral transmittance obtained by repeating the second step for a predetermined time or a predetermined number of times.
- an evaluation program for causing a computer to function as the evaluation device is recorded on a computer-readable recording medium.
- the UV protection effect can be evaluated with high accuracy in a short time.
- FIG. 1A It is a front view of an example of the evaluation system in one embodiment of the present invention. It is a side view of an example of the evaluation system shown in Drawing 1A. It is a figure which shows an example of a function structure of the evaluation apparatus by one Embodiment of this invention. It is a figure which shows an example of the hardware constitutions which can implement
- a plurality of optical filters are switched, and the spectral radiant intensity with respect to the light source is changed to the spectral radiant intensity for irradiating ultraviolet rays onto the portion (sample coated portion) where the measurement sample of the coating member is coated.
- the sample application portion (including the applied measurement sample) has a configuration that switches timely with the spectral radiation intensity for spectral transmittance measurement.
- a spectrometer evaluation system
- a one-dimensional image sensor is used.
- the spectral intensity of the light transmitted through the sample application portion can be simultaneously acquired for the entire specified wavelength range in a short time (for example, selectable within a range of 0.01 to 10 seconds). Therefore, it is possible to shorten the time for switching to the spectral transmittance measuring filter used in the evaluation process.
- 1A and 1B are diagrams illustrating an example of an evaluation system according to an embodiment of the present invention.
- 1A and 1B are a front view and a side view of the evaluation system 10, respectively.
- An evaluation system 10 shown in FIGS. 1A and 1B includes a personal computer (PC) 11 as an example of an evaluation apparatus, a light source 12, a filter unit 13, a filter switching unit 14 (filter changer), a rod lens 15, and a light.
- a pipe 16 and a spectroscope 17 are provided.
- the light source 12, the filter unit 13, and the filter switching unit 14 may be provided in the housing 21, but are not limited to this configuration.
- the rod lens 15 has a mirror 22.
- the evaluation system 10 includes a holder 23 that can be moved by placing an application plate (application member) 30 on which a sample to be measured (measurement sample) is applied.
- the light pipe 16 includes a condenser lens 24 and the like.
- the PC 11 controls each device in the evaluation system 10 to execute a preset process, and acquires a corresponding measurement value. Further, the PC 11 evaluates the ultraviolet ray protection effect based on the result such as the acquired measurement value.
- the PC 11 is not limited to a general-purpose PC, and may be various information processing apparatuses such as a server, a notebook PC, a tablet terminal, and a smartphone.
- the light source 12 irradiates, for example, ultraviolet rays having a predetermined wavelength at a predetermined timing by a control signal from the PC 11 in order to evaluate the ultraviolet protection effect.
- the filter unit 13 has one or a plurality of optical filters 13a.
- the filter unit 13 installs the optical filter 13 a selected by the filter switching unit 14 on the optical path of the ultraviolet rays emitted from the light source 12.
- the filter unit 13 may include a plurality of optical filters 13a having different bands of light to be transmitted. Thereby, the wavelength of the light passing through the optical filter of the filter unit 13 can be switched to a wavelength in a predetermined band.
- the filter switching means 14 can switch one or a plurality of optical filters 13 a provided in the filter unit 13 based on a predetermined condition by a control signal from the PC 11.
- a circular plate or the like provided with a plurality of different optical filters 13a is rotated around the center of the plate, and a predetermined filter is positioned on the optical axis.
- the configuration for switching the filter is not limited to this.
- a plurality of optical filters are provided on a slidable plate, and the plate is slid in a predetermined direction, whereby a predetermined optical filter is provided. Can be positioned on the optical axis.
- the rod lens 15 enlarges or reduces the irradiation area on the plane by moving the lens with respect to the optical path of the ultraviolet light obtained through the optional optical filter 13a of the filter unit 13. Specifically, in the rod lens 15, the light is made uniform and the optical path area is expanded.
- the rod lens 15 changes the optical path to the light pipe 16 side by the mirror 22. If there is no need to change the optical path, the mirror 22 may not be provided on the rod lens 15.
- the light pipe 16 may be, for example, a synthetic quartz light pipe (for example, a hexagonal column shape), but is not limited thereto.
- the light pipe 16 can use, for example, an optical fiber when outputting the light condensed on the spectroscope 17. Therefore, the light condensed on the end face of the light pipe 16 is made uniform while reflecting in the light pipe 16, and a part of the light is incident on the spectroscope 17 through a ⁇ 0.6 mm fiber for input of the spectroscope 17. The Thereby, the optical degradation at the time of transmission can be prevented.
- a spectrometer having no mechanical moving part using a semiconductor one-dimensional image sensor having no moving part integrated with spectroscopy and detection is used as the spectroscope 17, as described above.
- the spectral intensity of the light transmitted through the portion can be simultaneously acquired in a short time for the entire designated wavelength range. Thereby, for example, the time for switching to the spectral transmittance measuring filter can be shortened.
- the light collection efficiency can be increased by using a lens and a synthetic quartz light pipe as described above.
- the exposure (accumulation) time is changed (for example, selectable within a range of 0.01 to 10 seconds), and a plurality of results obtained in succession are synthesized by the PC 11 to obtain a final result. Dynamic range can be expanded.
- the filter switching means 14 for switching the plurality of optical filters 13a by having the filter switching means 14 for switching the plurality of optical filters 13a, it is possible to appropriately select each filter 13a and cope with another ultraviolet ray protection effect evaluation method corresponding to light degradation. It becomes possible. Specifically, for example, it is possible to cope with photodegradation UVA-PF measurement and the like, but the method for evaluating the ultraviolet protection effect corresponding to the photodegradation that can be dealt with is not limited to this.
- the temperature of the coating plate 30 and the sample attached to the holder 23 can be adjusted. Therefore, for example, as defined in the ISO 24443 protocol, the temperature of the sample can be adjusted to about 25 ° C. to 35 ° C. during irradiation.
- the intensity of the light source 12 in this embodiment is about 0.001 MED / min. To about 20.0 MED / min.
- the coating amount of the sample can be about 0.01 mg / cm 2 to about 10.0 mg / cm 2 , but the intensity of the light source 12 and the coating amount of the sample are limited to these ranges. Is not to be done.
- the arithmetic average roughness (Sa value) of the coating plate 30 can be about 0.01 ⁇ m to about 400 ⁇ m, but is not limited thereto.
- a plate coated with cosmetics for preventing ultraviolet rays may be used as a measurement sample, or a glass filter may be used in order to improve measurement reproducibility.
- FIG. 2 is a diagram illustrating an example of a functional configuration of a PC according to an embodiment of the present invention.
- 2 includes an input unit 41, an output unit 42, a storage unit 43, a light source control unit 44, a filter switching control unit 45, a spectral transmittance measurement unit 46, and an evaluation unit.
- Means 47, screen generation means 48, transmission / reception means 49, and control means 50 are provided.
- the input means 41 accepts various inputs such as start and end of various instructions from the user who uses the PC 11, input of settings, and the like. Specifically, the input unit 41 receives instructions such as a light source control instruction, a filter switching control instruction, a spectral transmittance measurement instruction, an evaluation instruction, a screen generation instruction, and a transmission / reception instruction in the present embodiment.
- instructions such as a light source control instruction, a filter switching control instruction, a spectral transmittance measurement instruction, an evaluation instruction, a screen generation instruction, and a transmission / reception instruction in the present embodiment.
- the input of information acquired by the input means 41 may be input using an input interface such as a keyboard or a mouse, for example, may be input in a touch panel format using a screen, or may be input using an operation key or the like.
- the input unit 41 may include a voice input unit that inputs voice using, for example, a microphone.
- the output unit 42 outputs the content input by the input unit 41 and the processing content executed based on the input content.
- the output means 42 may have display means such as a display and a monitor when outputting by screen display, for example, and may have sound output means such as a speaker when outputting by sound.
- the input unit 41 and the output unit 42 may be integrated with input / output, such as a touch panel.
- the storage means 43 stores various information necessary for the present embodiment. Specifically, the storage unit 43 stores various setting information at the time of measurement, execution progress of various processes, execution results, and the like. The storage unit 43 can read and write various stored information at a predetermined timing as required.
- the storage means 43 is composed of, for example, a hard disk or a memory.
- the light source control unit 44 controls the irradiation timing and intensity of the light source 12, outputs the control signal to the light source 12, and emits ultraviolet light having a predetermined wavelength from the light source 12. Etc. are irradiated.
- the filter switching control unit 45 selects a predetermined filter from one or a plurality of filters 13 a provided in the filter unit 13 switched by the filter switching unit 14 when measuring the spectral transmittance, and also selects the predetermined filter. The timing of switching to the filter is controlled. Note that the filter switching control means 45 generates a filter switching control signal and outputs the generated signal to the filter switching means 14 so that switching to a predetermined filter is performed.
- the spectral transmittance measuring means 46 measures the spectral transmittance for evaluating, for example, the ultraviolet protection effect using the evaluation system 10 shown in FIG. 1 described above. Specifically, the spectral transmittance measuring unit 46 performs light source control by the light source control unit 41, filter switching control by the filter switching control unit 45, and the like, and acquires a spectral transmittance measurement result based on a predetermined condition. .
- the spectral transmittance measuring unit 46 includes, for example, a first measuring unit 46a and a second measuring unit 46b.
- the first measuring means 46a refers to, for example, first selecting a spectral transmittance measuring filter and measuring the spectral transmittance before the measurement sample is photodegraded.
- the second measuring means 46b is, for example, after the measurement by the first measuring means 46a described above, after switching the spectral transmittance measuring filter to a filter for ultraviolet irradiation, photodegradation of the measurement sample applied.
- the process of the 1st and 2nd measuring means 46a and 46b is not limited to the above-mentioned content.
- the evaluation means 47 performs highly accurate evaluation of the protective effect against ultraviolet rays irradiated in, for example, real life use conditions and use environments based on the measurement results obtained by the spectral transmittance measurement means 46 described above.
- the evaluation unit 47 continues the measurement result due to the temporal change of the spectral transmittance for a predetermined time, for example, with the light degradation and the spectral transmittance measurement in the second measuring unit 46b described above as one cycle. Acquired and the time change of the spectral transmittance is recorded in the storage means 43 and the like. Moreover, the evaluation means 47 performs the ultraviolet-ray protective effect evaluation process etc. which considered the light degradation from the time change of the spectral transmittance, when measuring the time change of the spectral transmittance for a predetermined time.
- the transmission / reception means 49 is, for example, an external device such as the light source 11, the filter switching means 14, the spectroscope 17, or other external devices via a communication network connected to the Internet, a LAN (Local Area Network), and other various cables. Is a communication means for transmitting and receiving data to and from.
- the transmission / reception means 49 can receive various information already stored in the external device or the like, and can also transmit the result processed by the PC 11 to the external device or the like via a communication network or the like.
- an execution program (evaluation program) that can cause a computer to execute each function is generated, and the execution program is installed in, for example, a general-purpose PC or server.
- the evaluation process can be realized.
- an example of a hardware configuration of a computer capable of realizing the evaluation process according to an embodiment of the present invention will be described.
- FIG. 3 is a diagram illustrating an example of a hardware configuration capable of realizing the evaluation process.
- 3 includes an input device 61, an output device 62, a drive device 63, an auxiliary storage device 64, a main storage device 65, a central processing unit (CPU) 66, and a network connection device 67. These are connected to each other via a system bus B.
- CPU central processing unit
- the input device 61 includes a pointing device such as a keyboard and a mouse operated by a user who uses the evaluation device, and a voice input device such as a microphone.
- the input device 61 inputs a program execution instruction from a user or the like, various operation information, information for starting software, and the like.
- the output device 62 has a display that displays various windows and data for operating the computer main body for performing processing in the present embodiment, and the CPU 66 executes a control program to execute the program execution progress and results. Can be displayed. Further, the output device 62 can print the above processing result or the like on a print medium such as paper and present it to the user or the like.
- the execution program installed in the computer main body in the present embodiment is provided by, for example, a universal recording medium 68 such as a Universal Serial Bus (USB) memory, a CD-ROM, a DVD, or the like.
- the recording medium 68 on which the execution program is recorded can be set in the drive device 63, and the execution program included in the recording medium 68 is transferred from the recording medium 68 via the drive device 63 based on the control signal from the CPU 66. 64 is installed.
- the auxiliary storage device 64 stores an execution program in this embodiment, a control program provided in the computer, an execution process, an execution result, and the like based on a control signal from the CPU 66.
- the auxiliary storage device 64 can read and write necessary information from each stored information based on a control signal from the CPU 66 and the like.
- the auxiliary storage device 64 is made of, for example, Hard Disk Drive (HDD), Solid State Drive (SSD), or the like, and corresponds to the storage means 43 described above, for example.
- HDD Hard Disk Drive
- SSD Solid State Drive
- the main storage device 65 stores an execution program read from the auxiliary storage device 64 by the CPU 66.
- the main storage device 65 is composed of Read Only Memory (ROM), Random Access Memory (RAM), and the like.
- the evaluation process for the database in this embodiment can be executed by the hardware configuration as described above. Further, by installing the program, the evaluation process in the present embodiment can be easily realized on a general-purpose PC or the like.
- step S01 of FIG. 4 a filter for spectral transmittance measurement is selected from a plurality of preset filters by switching the filter in the filter switching unit 14 under the control of the filter switching control unit 45.
- step S02 The spectral transmittance of the measurement sample before light degradation in a predetermined wavelength region is measured (for example, about 10 seconds) by light irradiation of a light source including ultraviolet rays under preset light irradiation conditions. Note that the processing in steps S01 and S02 described above corresponds to the first step (first measuring means 46a).
- step S03 the spectral transmittance measuring filter is switched to the ultraviolet irradiation filter, and in step S04, the sample coating portion is subjected to light degradation for a predetermined time.
- the filter is switched to a filter different from the filter used in the process of step S01, and this filter switching is performed by the filter switching means 14.
- the predetermined time in step S04 is preferably about 2 minutes, for example, but is not limited thereto.
- step S05 the ultraviolet irradiation filter is switched again to the spectral transmittance measurement filter, and in step S06, the spectral transmittance after light degradation caused by irradiation with ultraviolet rays for a predetermined time is measured (for example, 10 seconds). Note that the processing in steps S03 to S06 described above corresponds to the second step (second measuring means 46b).
- step S07 it is determined whether or not the temporal change of the spectral transmittance for a predetermined time has been measured. If it has not been measured (NO in step S07), the evaluation process returns to step S03.
- step S08 when the temporal change of the spectral transmittance for a predetermined time is measured (YES in step S07), in step S08, an ultraviolet protection effect evaluation process is performed in consideration of light degradation from the temporal change of the spectral transmittance. Note that the processing in steps S07 and S08 described above corresponds to the third step (evaluation means).
- step S08 for example, the “erythema effect amount” is calculated from the transmitted light amount of the measurement sample, and the reaction end point is determined from the “cumulative erythema effect amount” obtained by accumulating the calculated value over the irradiation time. Then, the UV protection effect is evaluated by calculating the SPF value.
- the specific description here is abbreviate
- FIG. 5 is a diagram illustrating an example of each filter configuration included in the filter unit according to the embodiment of the present invention.
- items such as filter identification information (No.), measurement object, application, and related matters are shown.
- the light source filter (optical filter 13a) provided in the filter unit 13 in the present embodiment for example, a spectral transmittance measuring light source filter (for SPF measurement) or an irradiation (for UV degradation) light source filter (for UVA-PF measurement).
- the present invention is not limited to this.
- the filter unit 13 prepares a plurality of light source filters for each application. Thereby, for example, in SPF measurement, by switching the filter, it is possible to use the measurement light source spectrum in which the short wavelength side and the long wavelength side are not cut with respect to the irradiation light source spectrum.
- the transmittance can be accurately measured on the side.
- the transmittance on the short wavelength side greatly affects the SPF measurement value because there is a large weighting in the calculation of the SPF value.
- the above-mentioned% RCEE indicates, for example, the relative cumulative erythema effect (Relativistic Cumulative Erythemal Effects).
- MED means the minimum amount of erythema (Minimal Erythema Dose).
- MED on human skin is clearly bordered on an area of 2/3 or more of the irradiated site 16-24 hours after irradiation with ultraviolet rays. The minimum amount of ultraviolet rays that initially causes slight erythema (the unit for displaying the amount of ultraviolet rays is not specified).
- the SPF value can be calculated as (the minimum amount of erythema when the measurement sample protects the skin against ultraviolet rays) / (the minimum amount of erythema when the skin is directly irradiated with ultraviolet rays).
- the plurality of spectral transmittance measurement filters can optimize the dynamic range of the spectral transmittance measurement by switching the ND filter (a neutral density filter) according to the light amount of the light source. This is because the time required for one scan becomes shorter as the dynamic range becomes narrower.
- the filter unit 13 has a filter corresponding to irradiation (corresponding to ISO 24443) and spectral transmittance measurement (less than 0.2 J / cm 2 per measurement) as a UVA-PF measurement filter.
- the UVA-PF measurement filter is not limited to this. Also, the type of filter is not limited to the example of FIG.
- the irradiation light source filter can adjust the band of the light source by overlapping a plurality of filters, for example.
- a reflective ND filter can be used as the spectral transmittance measuring light source filter.
- ND is an acronym for Neutral Density
- NDxx% indicates, for example, a specification value of transmittance.
- FIG. 6 is a diagram illustrating an example of the high dynamic range process.
- FIG. 6A is a diagram for explaining the dependency of the image sensor output on the accumulation time.
- the horizontal axis represents the accumulation time [msec], and the vertical axis represents the sensor output value [Counts].
- FIG. 6B shows a spectrum acquisition example, the horizontal axis indicates the wavelength [nm], and the vertical axis indicates the sensor output value / integrated time [Counts / msec].
- the image sensor used at the time of measurement shown in the example of FIG. 6A has a resolution of 16 bits, but can change the accumulation time from 10 msec to 10000 msec. By applying this, a program to acquire the spectrum was created and verified to expand the dynamic range while maintaining linearity.
- the linearity of the sensor output with respect to the accumulation time is maintained in a region where the sensor is not saturated. Therefore, in this embodiment, as a data acquisition procedure, first, a spectrum group with a different accumulation time is acquired, and one sensor output becomes near the 16-bit upper limit (actually 63500) in order from the data with the longer accumulation time. Switch to short accumulation time spectrum data. Next, in the present embodiment, the final spectrum data can be obtained by combining the output by dividing the sensor output by the accumulation time.
- the noise of the sensor itself was 1 to 1.7 with “(sensor output) / (accumulation time)”.
- the dynamic range was a little less than 3 digits (combined output: 1.7 to 6553.5).
- a spectrum of 200 nm to 400 nm can be acquired within 10 seconds. Note that if the dynamic range needs only about the first two digits, the spectrum can be acquired within one second.
- the scanning speed is reduced to 1/10 to 1/100 of the conventional speed (about 120 seconds), and the speed can be increased.
- the sensor output value [Counts] is a value proportional to the incident intensity [mW / cm 2 ].
- FIG. 7 is a diagram for explaining an example of a screen according to an embodiment of the present invention.
- 7 includes a measurement parameter setting area 71, a count state display area 72, a transmission spectrum result display area 73, and an SPF value calculation result display area 74.
- the display content of the screen, the display layout, etc. are not limited to this.
- the user sets various measurement parameters for each setting information indicated in the measurement parameter setting area 71 by the input means 41 or the like. Thereafter, by executing processing, the count state for the measurement in real time is displayed in the count state display area 72 and the result is displayed in the transmission spectrum result display area 73.
- the SPF value is calculated from the time change of the area in consideration of the weighting (for example, erythema coefficient), and the SPF value calculation result display area 74 is calculated. Can also be displayed.
- FIG. 8 is a diagram showing an example of the result of the SPF value in the present embodiment.
- a spectrophotometer and a conventional device as shown in, for example, Patent Document 1 is shown, and “BG18” and “ND2%” are shown.
- BG18 is a glass filter manufactured by SCHOTT AG, and is used as an example of a glass filter having a higher wavelength dependency of transmittance (% T) other than various ND glass filters.
- 9 to 13 are diagrams showing an example of spectral transmittance using a glass filter. 9 to 13 correspond to the result example of FIG.
- FIG. 9 shows the spectral transmittance when the BG18 filter is used
- FIG. 10 shows the spectral transmittance when the ND2% filter is used
- FIG. 11 shows the spectral transmittance when the ND3% filter is used
- FIG. 12 shows the spectral transmittance when the ND5.2% filter is used
- FIG. 13 shows the spectral transmittance when the ND10% filter is used.
- FIGS. 9 to 13 show the results of transmittance (% T) with respect to wavelengths of 280 nm to 400 nm in the spectrophotometer, the conventional apparatus, and the present embodiment, respectively, as a broken line, a one-dot chain line, and a solid line. Yes.
- the spectrophotometer in the case of the BG18 filter, the spectrophotometer, the conventional apparatus, and the present embodiment can measure almost the same transmittance.
- the wavelength is about 290 nm to 320 nm. It can be seen that the amount of light is insufficient, and the transmittance (erythema transmitted light amount) is not accurately measured (stability is poor).
- an accurate value can be obtained for any of the filters described above, as in the case of the spectrophotometer.
- FIG. 14 is a diagram showing an example of the correlation with the spectrophotometer.
- FIG. 14A shows the correlation between the spectrophotometer and the conventional apparatus
- FIG. 14B shows the correlation between the spectrophotometer and the present embodiment.
- each of the diagrams shown in FIGS. 9 to 14 can also be generated by the screen generation means 48 described above, and the generated screen is displayed by the output means 42 and presented to the user or the like. be able to.
- the ultraviolet protection effect can be evaluated with high accuracy in a short time.
- there is means for switching a plurality of optical filters and an appropriate optical filter is selected for ultraviolet irradiation to the sample application part and for spectral transmittance measurement of the sample application part. Then, by measuring the spectral radiation intensity, for example, the measurement accuracy on the short wavelength side can be improved. Further, by using the embodiment of the present invention, it is possible to improve the stability of the result of evaluating the ultraviolet ray protection effect in consideration of light degradation.
- a mechanical movable part using a one-dimensional image sensor is used instead of performing mechanical sequential scanning over about 2 minutes using a photomultiplier tube and a monochromator as in the conventional method.
- a mechanical movable part using a one-dimensional image sensor is used instead of performing mechanical sequential scanning over about 2 minutes using a photomultiplier tube and a monochromator as in the conventional method.
- the spectral intensity of the light transmitted through the sample application portion can be acquired simultaneously for the entire specified wavelength range in a short time (for example, a spectrometer can be selected within a range of 0.01 to 10 seconds). Therefore, it is possible to shorten the time for switching to the spectral transmittance measuring filter.
- the light collection efficiency can be increased by using a lens, a synthetic quartz light pipe, and the like instead of an integrating sphere having a low light collection efficiency.
- the dynamic range is expanded by changing the signal amplification factor.
- the final dynamic range can be expanded by combining a plurality of results obtained continuously by changing the exposure (accumulation) time in the evaluation apparatus.
- Evaluation System 11 PC (Evaluation Equipment) DESCRIPTION OF SYMBOLS 12 Light source 13 Filter part 14 Filter switching means 15 Rod lens 16 Light pipe 17 Spectroscope 21 Case 22 Mirror 23 Holder 24 Condensing lens 30 Application
Abstract
Description
11 PC(評価装置)
12 光源
13 フィルタ部
14 フォルタ切換手段
15 ロッドレンズ
16 ライトパイプ
17 分光器
21 筐体
22 ミラー
23 ホルダ
24 集光レンズ
30 塗布プレート
41 入力手段
42 出力手段
43 記憶手段
44 光源制御手段
45 フィルタ切換制御手段
46 分光透過率測定手段
46a 第1の測定手段
46b 第2の測定手段
47 評価手段
48 画面生成手段
49 送受信手段
50 制御手段
61 入力装置
62 出力装置
63 ドライブ装置
64 補助記憶装置
65 主記憶装置
66 CPU
67 ネットワーク接続装置
68 記録媒体
70 画面
71 測定パラメータ設定領域
72 カウント状態表示領域
73 透過スペクトル結果表示領域
74 SPF値算出結果表示領域
Claims (9)
- 塗布部材に塗布された測定試料の紫外線防御効果の評価方法において、
予め設定された光照射条件による紫外線を含む光源の光照射により、所定の波長領域における前記測定試料の光劣化前の分光透過率を測定する第1のフィルタを選択して分光透過率を測定する第1のステップと、
前記第1のステップによる測定後に、前記第1のフィルタを紫外線照射用の第2のフィルタに切り換え、前記測定試料に紫外線を所定時間照射し光劣化させた後、前記第2のフィルタを前記第1のフィルタに切り換えて分光透過率を測定する第2のステップと、
前記第2のステップを所定時間又は所定回数繰り返して得られる前記分光透過率の時間変化に基づいて、前記紫外線防御効果の評価を行う第3のステップとを有することを特徴とする評価方法。 - 前記第1のステップ及び前記第2のステップは、
一次元イメージセンサを用いて前記塗布部材を透過した光の分光強度を取得することにより分光透過率を測定することを特徴とする請求項1に記載の評価方法。 - 前記光源から照射された光をレンズと合成石英ライトパイプとを用いて集光することを特徴とする請求項1に記載の評価方法。
- 塗布部材に塗布された測定試料の紫外線防御効果の評価装置において、
予め設定された光照射条件により紫外線を含む光を照射するように光源を制御する光源制御手段と、
前記光源の波長領域を調整する複数のフィルタを切り換えるフィルタ切換制御手段と、
前記光源制御手段と前記フィルタ切換制御手段とを用いて前記光源から照射された光に対する前記測定試料が塗布された前記塗布部材の分光透過率を測定する分光透過率測定手段とを有することを特徴とする評価装置。 - 前記分光透過率測定手段は、
前記光源の光照射により、所定の波長領域における前記測定試料の光劣化前の分光透過率を測定する第1のフィルタを選択して分光透過率を測定する第1の測定手段と、
前記第1の測定手段による測定後に、前記第1のフィルタを紫外線照射用の第2のフィルタに切り換え、前記測定試料に紫外線を所定時間照射し光劣化させた後、前記第2のフィルタを前記第1のフィルタに切り換えて分光透過率を測定する第2の測定手段とを有することを特徴とする請求項4に記載の評価装置。 - 前記第2の測定手段による測定を所定時間又は所定回数繰り返して得られる前記分光透過率の時間変化に基づいて、前記紫外線防御効果の評価を行う評価手段を更に有することを特徴とする請求項5に記載の評価装置。
- 前記第1の測定手段及び前記第2の測定手段は、
一次元イメージセンサを用いて前記塗布部材を透過した光の分光強度を取得することにより分光透過率を測定することを特徴とする請求項5に記載の評価装置。 - 前記光源から照射された光を集光するレンズと合成石英ライトパイプとを更に有することを特徴とする請求項4に記載の評価装置。
- コンピュータを、請求項4に記載の評価装置として機能させるための評価プログラムを記録したコンピュータ読取可能な記録媒体。
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