KR102394646B1 - System and Method for measuring UV protection index - Google Patents

Abstract

The present invention relates to a system and method for measuring a UV protection index, and the UV protection index measurement system according to an embodiment of the present invention measures at least one of UV index, environmental index, skin index, sunscreen index, and UV exposure time It includes a UV protection factor measurement unit, and a UV protection index calculation unit for calculating the UV protection index based on the UV index, environmental index, skin index, sunscreen index, and UV exposure time.

Description

UV protection index measuring system and method {System and Method for measuring UV protection index}

The present invention relates to a system and method for measuring a UV protection index, and to a system and method for measuring a UV protection index capable of measuring a UV protection index suitable for a user's skin type and environment.

Ultraviolet rays cause imbalance and damage of collagen and elastin in the epidermis and dermis of the skin, reducing skin elasticity, forming wrinkles, and promoting aging. In addition, it may induce melanin pigmentation in the skin, causing melasma, freckles, and the like. Furthermore, it can cause serious diseases such as skin cancer, cataracts, and immunosuppression. In order to prevent such effects of ultraviolet rays, the Korea Meteorological Administration and other national meteorological agencies currently forecast the ultraviolet index in advance, and each individual is also preventing the harmful effects of ultraviolet rays by applying sunscreen to the skin. Sunscreens sold on the market have a wide variety of sunblock indexes, and users are purchasing the product without specific standards for which one to select.

However, the sensitivity of the skin to UV rays is markedly different for each individual. For example, even when exposed to the same amount of ultraviolet light, there are people whose skin does not turn black with severe redness, while there are people who hardly turn red and darken. This difference is even greater when there are different races. In addition, the amount of UV light shows a significant difference depending on the weather environment of the day, and the amount of UV light shows a significant difference depending on the background environment such as a swimming pool or the sea. Accordingly, the UV protection index of the required sunscreen varies significantly depending on the weather environment, the background environment, and the user's skin characteristics.

In Patent Document 1, an attempt was made to determine an individual's UV protection index required for skin protection, but it was difficult to obtain an accurate UV protection index because it was difficult to obtain practical information on the UV reflectivity or transmittance of the background environment. In addition, it was not possible to provide an accurate UV protection index because factors such as the residual amount of sunscreen and UV sensitivity or irritation for each skin type were not taken into account.

KR 10-1221224 B1

The present invention is to solve the above problems, and provides a UV protection index measuring system and method that can be used for various UV research by objectively comparing UV intensity in a laboratory environment rather than an actual environment without weather, location, or time restrictions. will do

In addition, it is to provide a UV protection index measurement system and method that can provide UV protection index information suitable for the user in consideration of both individual skin characteristics and environmental characteristics.

A UV protection index measuring system according to an embodiment of the present invention includes: a UV blocking element measuring unit for measuring at least one of a UV index, an environmental index, a skin index, a sunscreen index, and a UV exposure time; and a UV protection index calculator for calculating the UV protection index based on the UV index, the environmental index, the skin index, the sunscreen index, and the UV exposure time.

The UV blocking element measuring unit includes an environmental index measuring unit including a UV light source, a background material storage unit, and a first UV sensor, wherein the UV light source, the background material storage unit and the first UV sensor are arranged to be aligned in a straight line, , The background material storage unit may be formed of a light-transmitting material.

The UV blocking element measuring unit includes an environmental index measuring unit including a UV light source, a background material storage unit, and a second UV sensor, wherein the second UV sensor is preset with respect to a light path from the UV light source toward the background material storage unit It is disposed at an angle, and an actuator may be connected to the second UV sensor or the background material storage unit.

The environmental index measuring unit may include a light blocking film surrounding the UV light source, the background material storage unit, and the UV sensor, and an anti-scattering film may be attached to an inner surface of the light blocking film.

The environmental index measuring unit may measure the environmental index (E) according to the following [Equation 6] by giving a weight to the effective ultraviolet light amount to the UV transmittance (T) or UV reflectance (R).

[Equation 6]

The UV blocking element measurement unit, the skin index measurement for measuring the skin index (S) by giving a weight to the amount of change of the measured minimum erythema amount (MED) of the user with respect to the minimum erythema amount (MED) of the skin in which erythema does not occur It may include more wealth.

The skin index measurement unit gives weight to the change rate of the minimum erythema amount (MED) of the user's skin type measured on the basis of 1 for skin type 6 in which erythema does not occur in the Fitzpatrick skin type, to determine the skin index (S) can be measured

The sunscreen factor measuring unit may further include the sunscreen index measuring unit measuring the sunscreen index (D) as shown in [Equation 5] below by weighting the residual amount of the sunscreen to be tested over time. .

[Equation 5]

The UV protection index calculation unit, the UV index (U) for the amount of UV light on the target day, the environmental index (E) in which a weight is given to the reflectivity or transmittance of the background material, and the skin index (S) in which a weight is given to the skin characteristics of the user ), the sunscreen index (D) and the ultraviolet exposure time (T) weighted with respect to the residual amount of the sunscreen may be used to calculate the sunscreen index.

The UV protection index calculation unit multiplies the UV index (U), the environmental index (E), the skin index (S), the sunscreen index (D), and the UV exposure time (T) to effectively affect the effective UV light amount on the user is calculated and divided by the user's minimum erythema amount (MED) to calculate the SPF UV protection index.

A method for measuring a UV protection index according to another embodiment of the present invention includes the steps of measuring a UV blocking factor for measuring at least one of a UV index, an environmental index, a skin index, a sunscreen index, and a UV exposure time; and calculating the UV protection index based on the UV index, the environmental index, the skin index, the sunscreen index, and the UV exposure time.

The measuring step of the UV blocking element, calculating the UV index (U) according to the UV index; measuring an environmental index (E) by weighting the UV reflectivity or UV transmittance of the background material; measuring the user's skin index (S) by weighting the user's skin characteristics; measuring the sunscreen index (D) by weighting the residual amount of the sunscreen over time; It may include calculating the UV exposure time (T).

In the step of calculating the sunscreen index, multiply the ultraviolet index (U), environmental index (E), skin index (S), sunscreen index (D), and ultraviolet exposure time (T) to effectively affect the user It is possible to calculate the amount of effective UV light exerted and divide it by the user's minimum amount of erythema (MED) to calculate the SPF UV protection index.

According to an embodiment of the present invention, it is possible to provide a UV protection index measuring system and method that can be used for various UV research by being able to objectively compare UV intensity in a laboratory environment rather than an actual environment without weather, location, and time restrictions. there is.

In addition, it is possible to provide a UV protection index measurement system and method that can more effectively protect the user's skin from UV rays by calculating a UV protection index suitable for them in consideration of both individual skin characteristics and environmental characteristics.

Based on the determined UV protection index, it is possible to provide a UV protection index measurement system and method that can effectively guide the selection and use of UV protection products.

1 is a view schematically showing a UV protection index measuring system according to an embodiment of the present invention.
2 is a view showing a UV protection index measuring system according to an embodiment of the present invention.
3 is a diagram schematically illustrating an environmental index measuring unit according to an embodiment of the present invention.
4 is a flowchart schematically illustrating a method for measuring a UV protection index according to an embodiment of the present invention.
5 is a flowchart illustrating a method for measuring a UV protection index according to an embodiment of the present invention.

Since the present embodiments can apply various transformations and can have various embodiments, specific embodiments are illustrated in the drawings to be described in detail. However, this is not intended to limit the scope of the specific embodiments, and it should be understood to include all transformations, equivalents and substitutions included in the spirit and scope of the disclosure. In describing the embodiments, if it is determined that a detailed description of a related known technology may obscure the subject matter, the detailed description thereof will be omitted.

In an embodiment, a 'module' or 'unit' performs at least one function or operation, and may be implemented as hardware or software, or a combination of hardware and software. In addition, a plurality of 'modules' or a plurality of 'units' are integrated into at least one module and implemented with at least one processor (not shown) except for 'modules' or 'units' that need to be implemented with specific hardware. can be

Hereinafter, the embodiment will be described in detail with reference to the accompanying drawings, and in the description with reference to the accompanying drawings, the same or corresponding components are given the same reference numerals, and the overlapping description thereof will be omitted.

Ultraviolet rays can be divided into ultraviolet C (UVC) having a wavelength of 100 to 280 nm, ultraviolet B (UVB) having a wavelength of 280 to 315 nm, and ultraviolet A (UVA) having a wavelength of 315 to 400 nm. Generally used, the sun protection factor SPF (Sun Protection Factor) is an index showing the blocking effect of blocking UVB, and the UV protection factor PA (Protection factor of UVA) is an index showing the blocking effect of blocking UVA.

Here, the UV protection index SPF is an index indicating the blocking effect of products that block UVB. It means a value divided by the obtained minimum erythema amount (MED), and can be expressed as [Equation 1] below.

[Equation 1]

For example, the minimum amount of erythema (MED) of the user may be obtained by measuring the minimum amount of ultraviolet light that can show erythema in most of the irradiation area at 16 to 24 hours after irradiating the user's skin.

In the case of the present invention, the UV protection index SPF is obtained by measuring the total amount of effective UV light that effectively affects the user (hereinafter, “effective UV light dose”), and dividing it by the minimum erythema (MED) value according to the skin characteristics of the user. It can be calculated as in [Equation 2] below.

[Equation 2]

Measuring or calculating the total amount of effective UV light that can affect the user on the target day and background environmental conditions, and dividing it by the user's minimum erythema (MED) value, You can calculate the SPF index of a sunscreen.

1 relates to a system for measuring a UV protection index according to an embodiment of the present invention. The system for measuring a UV protection index according to an embodiment of the present invention is a UV blocking element for measuring factors affecting the total amount of effective UV light. It includes a measuring unit 10 and a UV blocking index calculator 20 for calculating a UV blocking index based on the total amount of UV light and the skin characteristics of the user based on the measured elements.

The UV blocking factor measuring unit 10 measures factors necessary to determine the UV blocking index. In addition to the case where the user directly measures the values of the necessary elements, the user's skin type, the remaining amount of sunscreen, the UV reflectance or UV transmittance of the background material, the UV index of the target day, etc. It is also possible to use a pre-stored value by storing it in (DB). In addition, the above values may be measured in advance and provided from an external server for use.

2 is a view schematically showing a system for measuring a UV protection index according to a specific embodiment of the present invention. Referring to FIG. 2 , in order to calculate an effective UV light amount, the UV blocking element measuring unit 10 includes a UV index, At least one of an environmental index, a skin index, a sunscreen index, and a UV exposure time can be measured. It may include at least one of the index measuring unit 14 and the UV exposure time measuring unit 15 .

Accordingly, the UV index according to the weather environment (U), the environmental index according to the background environment (E), the user's skin index (S), the sunscreen index for the properties of the sunscreen (D), and the UV exposure time (T) One or more of these factors may be taken into account to calculate the required UV protection factor value based on the exact weather, background, user, sunscreen, and UV exposure time.

Specifically, factors affecting the UV protection index include UV index, UV reflectance or transmittance for each background material, UV sensitivity according to the user's skin characteristics, UV exposure time, and the residual amount of the UV blocking agent.

Based on these factors, the effective ultraviolet light quantity (Q) is calculated, and the effective ultraviolet light quantity (Q) is divided by the minimum erythema quantity (MED) of the user's skin to calculate the ultraviolet protection index SPF.

According to an embodiment of the present invention, the effective amount of UV light (Q) can be calculated as shown in [Equation 3] below in consideration of factors that have an effective influence on the UV protection index.

[Equation 3]

The UV index measurement unit 11 may measure the UV index according to a seasonal variable or weather (sunny/cloudy). Currently, the World Health Organization (WHO) has developed the Global Solar UV index for the UV index and is announcing the risk of UV rays as the UV index every day.

In order to obtain the effective ultraviolet light quantity Q, the ultraviolet index measuring unit 11 can be used to calculate the ultraviolet index U by converting it into a corresponding ultraviolet light quantity known according to the UV index.

That is, the UV index measuring unit 11 may calculate the UV index (U) using the UV index. The UV index is divided into 10 grades and is expressed as a number from 1 to 11+ (11 or more), and the amount of light according to the international standard (WHO) is as follows [Table 1].

[Table 1]

On the other hand, the environmental index measurement unit 12 measures the environmental index (E, Environmental UV) by the background environment that is the active area on the day the user is a target. For example, the background environment may include a swimming pool, the sea, grass, sand, and the like. In the case of a swimming pool or the sea, the reflectivity or transmittance of ultraviolet rays varies depending on the material contained therein, so the effect can be reflected.

3 is a diagram schematically showing an environmental index measuring unit according to an embodiment of the present invention.

Referring to FIG. 3 , the environmental index measuring unit 12 includes a UV light source 101 , a background material storage unit 103 and UV sensors 105a and 105b to measure the UV transmittance or UV reflectivity of the background material. may include

3 (a) is a structure for measuring the UV transmittance of the background material (X), is formed to irradiate UV from the UV light source 101, the background material storage unit 103 and sequentially on the UV light path A first UV sensor 105a may be disposed. Since the first UV sensor 105a measures transmitted light passing through the background material X, the UV light source 101, the background material storage unit 103, and the first UV sensor 105a are arranged to be aligned in a straight line. can be In addition, the background material storage unit 103 may be formed of a material having light transmittance to minimize the effect on UV transmittance. As an example, a member such as a mass cylinder made of glass may be used.

3 (b) is a structure for measuring the UV reflectivity of the background material (X), is formed to irradiate UV from the UV light source 101 toward the background material storage unit 103, the reflected light reflected from the background material A second UV sensor may be disposed to have a preset angle with respect to the light path from the UV light source 101 toward the background material storage 103 to measure the .

The background material storage unit 103 may be made of a light-transmitting or non-transmissive material. In addition, the second UV sensor 105b may be connected to an actuator (not shown) to adjust the angle of the UV light source 101-background material storage unit 103 with respect to the light path. To adjust the angle, the background material storage unit 103 may be connected to an actuator (not shown) to adjust the height. That is, the reflectance of the second UV sensor 105b or the background material storage 103 is adjusted to adjust the angle of the second UV sensor 105b with respect to the light path of the UV light source 101-background material storage 103 . An actuator that moves to this highest position may be connected.

Meanwhile, the environmental index measuring unit 12 includes a UV light source 101 , a background material storage unit 103 having light transmission properties, and a UV light source 101-background material storage unit to measure both UV transmittance and UV reflectivity. The first UV sensor 105a disposed on the optical path of 103, the second UV sensor 105b having a preset angle with respect to the optical path of the UV light source 101-background material storage 103, and the It may be formed to include an actuator connected to the second UV sensor 105b or the background material storage unit 103 . Accordingly, it is possible to store a predetermined background material in the background material storage unit 103 and measure both UV transmittance and UV reflectivity.

That is, in the case of swimming pool water or seawater in a liquid state, both UV transmittance and UV reflectivity can be measured and used. And, in the case of grass, sand, asphalt, etc., where transmitted light cannot be measured, UV reflectivity may be measured and used.

3 (a) and (b), the UV light source 101, the background material storage unit 103 and the first UV sensor 105a, or the UV light source 101, the background material storage unit 103 and a light blocking film 107 surrounding the second UV sensor 105b, and may include, for example, a light blocking film 107 in the form of a chamber. Accordingly, it is possible to measure accurate UV reflectance or UV transmittance by blocking external light sources. In addition, an anti-scattering film is attached to the inner surface of the light blocking film 107 to measure UV reflectance or transmittance more accurately.

According to an embodiment, 1000W UV Solar simulator (model No. 91294)) may be used as the above-described UV light source. In addition, a UV-visible Spectroradiometer (model No. SPR-4001) may be used as the first UV sensor or the second UV sensor. It is not necessarily limited thereto, and various UV light sources or UV sensors that can be used in the art may be applied thereto.

Accordingly, according to an embodiment of the present invention, the UV intensity of various materials in a laboratory environment reflecting actual outdoor environmental factors may be considered and reflected in the environmental index.

By measuring the UV intensity of each background material and the UV transmittance of each background material without restrictions on location, time, and weather, it is possible to calculate the effective amount of UV light that affects users in various background environments. In addition, by measuring the reflectivity of ultraviolet rays for each background material, it is possible to calculate the effective amount of ultraviolet light that affects the user for each background environment.

According to an embodiment of the present invention, since the UV blocking index is calculated based on the measurement of UV reflectance or UV transmittance for the actual background environment, it is possible to provide a more objective and reliable UV blocking index.

According to an embodiment of the present invention, the environmental material measuring unit 12 may include a control unit (not shown) connected to at least one of the first UV sensor and the second UV sensor.

The control unit is based on the UV transmission amount (UV reference 1) in a state in which the background material to be tested is not contained and the amount of UV transmission in the state in which the background material to be tested is contained (UV transmission) measured by the first UV sensor, The transmittance (T) can be calculated. The formula of UV transmittance (T) can be calculated as [Equation 4] below.

[Equation 4]

In addition, the control unit is based on the intensity of the UV light source measured by the second UV sensor (UV reference 2) and the amount of UV reflection reflected by the background material to be tested (UV reflection), as shown in [Equation 5] below, the UV reflectance ( R) can be calculated.

[Equation 5]

The controller may calculate the environmental index (E, Environmental UV) based on UV reflectance or UV transmittance.

According to an embodiment, the environmental index (E) may be calculated by weighting the UV reflectivity or UV transmittance of the background material. The increase or decrease of the amount of ultraviolet light may be reflected according to the reflectivity or transmittance of the background material, and specifically, it may be calculated as shown in [Equation 6] below.

[Equation 6]

The UV reflectivity or UV transmittance and the environmental index (E) of each background material measured according to an embodiment are shown in Table 2 below.

[Table 2]

By measuring the UV transmittance of each material, the amount of UV transmitted light in various environments can be predicted. In addition, it is possible to estimate the amount of reflected UV light for each background environment by measuring the reflectivity of UV rays for each material such as sand, grass, seawater, and swimming pool water.

Meanwhile, the skin index measurement unit 13 may calculate the skin index (S, Skin type) by measuring the skin characteristics of the user and assigning weights to the increase or decrease of the effective ultraviolet light amount according to the skin characteristics. The skin index measuring unit 13 may calculate the UV weighting index according to the user's skin type by reflecting the user's UV sensitivity.

The skin index measurement unit 13 can measure the skin index (S) by giving a weight to the change amount of the user's minimum erythema amount (MED) measured with respect to the minimum erythema amount (MED) of the skin in which erythema does not occur. there is.

According to an embodiment, the skin index measurement unit 13 is a Fitzpatrick skin type skin type 6, which does not cause erythema, as a reference 1, as a change rate of the measured minimum erythema amount (MED) of the user's skin type. By weighting, the skin index (S) can be measured.

Specifically, the minimum erythema amount (MED) may be calculated according to the user's Fitzpatrick skin type by measuring the user's skin characteristics. In this specification, the MED for each Fitzpatrick skin type is “Assessment of the feasibility of using sunlight exposure to obtain the recommended level of vitamin D in Canada (CMAJ open, 2015 Jul 17, 3(3), E258-63)”.

Therefore, the skin index measurement unit 13 calculates the skin type 6 in which erythema does not occur as the reference 1, and assigns the amount of change in the MED value showing the difference for each skin type as a weight to calculate the skin index (S). there is. For example, for each skin type, it may be calculated in advance as shown in [Table 3] below.

[Table 3]

Specifically, the MED change rate from skin type 6 to type 5 is 40%, and when type 5 is compared to type 6, erythema occurs on the skin even with a smaller amount of light. Therefore, the UV weight for skin type 5 may be given a weight of 0.4 compared to type 6. That is, the skin index (S) of skin type 5 may be 1.4. Accordingly, the skin index measuring unit 13 may calculate the user's skin index (S) by measuring the user's skin type.

The sunscreen index measuring unit 14 assigns a weight according to the residual amount of the sunscreen according to time to reflect this, since the residual amount of individual sunscreen decreases with time, and thus the sunscreen index (D, sunscreen dose) ) is measured.

The sunscreen index measuring unit 14 may apply the sunscreen to be tested to the skin, measure the residual amount over time, calculate the change rate, and assign a weight to it. Specifically, the sunscreen index (D) can be calculated as shown in [Equation 7] below.

[Equation 7]

For example, if the amount of the preset sunscreen agent remaining over time is as follows, the sunscreen index (D) may be calculated as shown in [Table 4] below.

[Table 4]

Referring to [Table 4] above, since the residual amount of the sunscreen at 0 hours is 100%, the sunscreen index (D) becomes 1, and when the residual amount is 98.09% after 0.5 hours, the sunscreen index (D) ) changed approximately 2% compared to when it was 100%, so the sunscreen index (D) can be 1.02 by adding a weight of 0.02.

The UV exposure time measuring unit 15 may measure the UV exposure time T because the effective UV light amount is proportional to time. The UV exposure time T may be a time during which an actual user is exposed to UV rays or may be an expected exposure time. value can be reflected.

As an example, since the unit of the total amount of ultraviolet light in the amount of light according to the international standard (WHO) is used in mJ/cm ² sec, it may be converted into a value in seconds (sec) and reflected.

As described above, the UV protection index calculation unit 20 includes the UV index (U), the environmental index (E), the skin index (S), and the sunscreen index (D) measured by the UV blocking factor measuring unit 10 as described above. And it is possible to measure the UV protection index based on the UV exposure time (T).

According to one embodiment, referring to the above-mentioned [Equation 2] and [Equation 3], it is possible to calculate the UV protection index SPF as shown in [Equation 8] below.

[Equation 8]

4 schematically shows a method for measuring the UV protection index according to an embodiment of the present invention. Referring to FIG. 4 , the method for measuring the UV protection index according to the present invention includes UV index, environmental index, skin index, and sunscreen A UV protection factor measuring step (S10) of measuring one or more of the index and UV exposure time, and calculating the UV protection factor based on the UV index, environmental index, skin index, sunscreen index, and UV exposure time (S20) includes

According to an embodiment, the contents regarding the UV protection index measuring system may also be applied to the UV blocking index measuring method. The opposite is also true. Duplicate content will be omitted.

5 is a method for measuring the UV blocking index SPF according to a specific embodiment of the present invention. Referring to FIG. 5 , the UV blocking factor measuring step (S10) is to calculate the UV index (U) according to the UV index. Step (S11), measuring the environmental index (E) by weighting the UV reflectivity or UV transmittance of the background material (S12), measuring the user's skin index (S) by weighting the user's skin characteristics Step, measuring the sunscreen index (D) by weighting the residual amount over time of the sunscreen, and measuring the ultraviolet exposure time (T).

The ultraviolet index (U), environmental index (E), skin index (S), sunscreen index (D), and ultraviolet exposure time (T) may be measured or calculated in the manner described in the ultraviolet protection factor measuring unit 10 . there is.

In the step of calculating the UV protection index, the effective UV light amount is calculated by multiplying the UV index (U), the environmental index (E), the skin index (S), the sunscreen index (D), and the UV exposure time (T), This can be divided by the user's minimum erythema amount (MED) to calculate the SPF UV protection index (S21).

In addition to the transmittance and reflectivity of UV rays, the effect of UV rays on the skin depends on various factors such as weather, personal living environment, and skin type. According to an embodiment of the present invention, the amount of UV rays affecting the actual skin is predicted by using the UV index, which is an individual skin type, UV reflectivity by location, residual amount of UV blocker, exposure time, and the weather index of the day, and each individual It is possible to calculate the required UV protection index so that you can choose a UV protection product suitable for your skin type and environment.

Calculate the effective amount of UV light that affects the skin by calculating the weight of factors that affect the UV protection index can be calculated.

Such an effective UV protection index can help users to select a UV protection product suitable for their skin and environment by providing the user with the necessary UV protection factor information. Accordingly, it is possible to increase the satisfaction of sunscreen products and provide unique characteristic indicators necessary for the selection of sunscreen products.

[Example 1]

When the UV Index of the day was 10, the indices of a person with skin type 1 staying in the swimming pool for 3 hours with sunscreen applied were calculated as shown in [Table 5] below.

[Table 5]

Here, the unit of light quantity was changed from mW/m ² to mJ/cm ² in order to match the unit of light quantity and total UV light according to the international standard (WHO). In this case, the effective UV light quantity (Q ₁ ) is calculated as follows became

Since the user is skin type 1, in this case, the MED is 20mJ/cm ² , so the UV protection factor (SPF) was calculated as follows.

As a result, it can be seen that the UV protection index of the sunscreen required by the user is approximately 69, approximately 70.

10: UV blocking element measurement unit
11: UV index measuring unit
12: Environmental index measurement unit
13: skin index measurement unit
14: Sunscreen index measurement unit
15: UV exposure time measurement unit
20: UV protection index calculation unit

Claims (13)

UV protection factor measuring unit for measuring UV index, environmental index, skin index, sunscreen index and UV exposure time; and
a UV protection index calculator for calculating a UV protection index based on the UV index, the environmental index, the skin index, the sunscreen index, and the UV exposure time;
The UV blocking element measuring unit includes: a UV light source; background material storage; and an environmental index measuring unit including a UV sensor,
UV protection index measurement system.
The method of claim 1,
The UV sensor comprises a first UV sensor,
The UV light source, the background material storage unit and the first UV sensor are arranged to be aligned in a straight line, and the background material storage unit is formed of a light-transmitting material.
The method of claim 1,
The UV sensor includes a second UV sensor,
The second UV sensor is disposed to have a preset angle with respect to the light path from the UV light source toward the background material storage, and the second UV sensor or the background material storage unit is a UV blocking index measurement, characterized in that the actuator is connected system.
4. The method according to any one of claims 1 to 3,
The environmental index measuring unit includes a light-shielding film surrounding the UV light source, the background material storage unit and the UV sensor, and an anti-scattering film is attached to the inner surface of the light-shielding film.
5. The method of claim 4,
The environmental index measurement unit, UV transmittance (T) or UV reflectance (R) by giving a weight to the effective amount of ultraviolet light to measure the environmental index (E) according to the following [Equation 6] UV protection index measurement, characterized in that system.
[Equation 6]

The method of claim 1,
The UV blocking element measurement unit, the skin index for measuring the skin index (S) by giving a weight based on the change amount of the user's minimum erythema amount (MED) measured with respect to the minimum erythema amount (MED) of the skin in which erythema does not occur UV protection index measurement system, characterized in that it further comprises a measurement unit.
7. The method of claim 6,
The skin index measurement unit gives weight to the change rate of the minimum erythema amount (MED) of the user's skin type measured on the basis of 1 for skin type 6 in which erythema does not occur in the Fitzpatrick skin type, to determine the skin index (S) UV protection index measurement system, characterized in that for measuring.
The method of claim 1,
The sunscreen factor measuring unit further comprises the sunscreen index measuring unit measuring the sunscreen index (D) as shown in [Equation 5] below by weighting the residual amount of the sunscreen to be tested over time UV protection index measurement system with
[Equation 5]

The method of claim 1,
The UV protection index calculation unit, the UV index (U) for the amount of UV light on the target day, the environmental index (E) in which a weight is given to the reflectivity or transmittance of the background material, and the skin index (S) in which a weight is given to the skin characteristics of the user ), a UV protection index measurement system, characterized in that the UV protection index is calculated based on the UV protection factor index (D) and the UV exposure time (T) weighted with respect to the residual amount of the UV blocking agent.
10. The method of claim 9,
The UV protection index calculation unit,
The UV index (U), environmental index (E), skin index (S), sunscreen index (D), and UV exposure time (T) are multiplied to calculate the effective amount of UV light that has an effective effect on the user, and is A UV protection index measurement system, characterized in that it calculates the SPF UV protection factor by dividing it by the amount of erythema (MED).
UV protection factor measuring step of measuring UV index, environmental index, skin index, sunscreen index and UV exposure time; and
Calculating the UV protection index based on the UV index, the environmental index, the skin index, the sunscreen index, and the UV exposure time.
12. The method of claim 11,
The step of measuring the UV blocking factor,
Calculating the UV index (U) according to the UV index;
measuring an environmental index (E) by weighting the UV reflectivity or UV transmittance of the background material;
measuring the user's skin index (S) by weighting the user's skin characteristics;
measuring the sunscreen index (D) by weighting the residual amount of the sunscreen over time; and
UV protection index measurement method comprising the step of measuring the UV exposure time (T).
13. The method of claim 12,
In the step of calculating the UV protection index,
Multiply the UV index (U), environmental index (E), skin index (S), sunscreen index (D), and UV exposure time (T) to calculate the effective amount of UV light that effectively affects the user A method of measuring the UV protection index, characterized in that the SPF UV protection factor is calculated by dividing by the minimum erythema amount (MED).

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