JP2014238989A - Illumination device and illumination method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology for irradiating an object with light for making it look beautiful by controlling a spectrum of irradiation light so that intensity of light in a specific wavelength region generated from the object increases.SOLUTION: An illumination device includes: an illumination part 2 capable of applying light having different spectra; a light intensity measurement part 3 which measures intensity of light in a wavelength region generated from the object when the object S is irradiated with irradiation light; and a control part 4 which, on the basis of a measured value obtained by the light intensity measurement part, controls so that the intensity of light in a specific wavelength region out of the wavelength region increases. When the object is skin of a person, light for making the skin more beautiful is applied by setting the specific wavelength region to 460-500 nm.

Description

  The present invention relates to a lighting device and a lighting method. In particular, the present invention relates to lighting technology for making human skin look beautiful.

In the fields of beauty and fashion, photographing the skin beautifully is one of the most important issues.
The appearance of the beauty of the skin differs depending on the skin color and skin quality of the object (subject) and the presence or absence of makeup even under the same lighting. Therefore, in order to make the skin look most beautiful, it is necessary to adjust the illumination according to the object.
Conventionally, the illumination light has been adjusted based on the experience and know-how of the illuminator.

The following technologies are known as lighting devices that make skin look beautiful.
Patent Document 1 discloses an illumination device that irradiates light with an illumination unit having a light emitting element and a phosphor that emits light of different wavelengths when excited by light from the light emitting element, and the illumination unit has a wavelength When the output value of light at the emission peak in the range of 440 to 465 nm is 100%, the output value of light at the wavelength of 500 nm is in the range of 35 to 55%, and the output value of light at the wavelength of 550 nm is 45 to 80%. The output value of light at a wavelength of 600 nm is in the range of 45 to 75%, the output value of light at a wavelength of 640 nm is in the range of 50 to 80%, and the output value of light at a wavelength of 640 nm with respect to the output value of light at a wavelength of 600 nm is The output value is in the range of 100 to 120%, the output value of the light of wavelength 640 nm is in the range of 85 to 130% with respect to the output value of light of wavelength 550 nm, and light having a color temperature of 4500 to 5500K is irradiated. The lighting device is described which is characterized.

JP 2013-58473 A

  As described in Patent Document 1, although an illumination device that irradiates illumination light that makes the skin look beautiful has been developed, illumination that looks more beautiful according to the object, particularly in scenes such as shooting. It is desirable to choose.

  Then, this invention makes it a subject to provide the illumination technique which implement | achieves the illumination which makes skin look beautiful according to a target object. That is, it is an object to provide an illumination technique for customizing irradiation light according to an object.

  In view of such a situation, as a result of earnest research efforts for the lighting technology to make the skin look beautiful, the present inventors have found that the intensity of light in a specific wavelength region (460 to 500 nm) generated from the skin is I found that it is deeply related to the beauty of.

Therefore, the present inventors controlled the spectrum of light applied to the skin based on the intensity of light in a specific wavelength region generated from the skin, so that the light suitable for making the skin look more beautiful. It was found that can be irradiated.
The present invention has been made based on the above findings.

In order to solve the above problems, an illumination device according to the present invention includes an illumination unit capable of irradiating light of different spectra, and an intensity of light in a wavelength region generated from the object when the object is irradiated with irradiation light. A light intensity measurement unit to measure, and a control unit that controls the intensity of light in a specific wavelength region out of the wavelength regions based on a measurement value obtained by the light intensity measurement unit; It is characterized by that.
By controlling the intensity of light in a specific wavelength region generated from the object to increase, for example, it becomes possible to control the spectrum of irradiation light or the spectrum of light generated from the object. Depending on the situation, it is possible to irradiate light that makes the skin look beautiful, or to produce an effect that makes the skin look beautiful.
When the object is human skin, the specific wavelength region can be set to 460 to 500 nm to irradiate light that makes the skin look more beautiful.

In a preferred aspect of the present invention, the illumination unit includes a plurality of light sources having different peaks, and a light source control unit that controls an output value of each light source.
With such a configuration, it is possible to irradiate light of various spectra by simply switching the light source sequentially.

In a preferred embodiment of the present invention, the illumination unit includes: a wavelength range selection unit that selects a wavelength range of light that irradiates the object; and a light amount adjustment unit of a light source that corresponds to the selected wavelength range. To do.
As described above, the illumination unit includes the wavelength range selection unit for the light irradiating the object and the light amount adjustment unit for the light source. Therefore, the wavelength range selection unit sequentially selects the wavelength range of the light irradiating the object. Thus, it becomes possible to irradiate light of various spectra. In this case, since it is not necessary to provide a large number of light sources, the size can be reduced accordingly.

In a preferred embodiment of the present invention, the irradiation light is light having a color temperature of 4500 to 5500K.
By selecting the irradiation light within the color temperature range, it is possible to irradiate light that makes the skin look more beautiful.

In a preferred embodiment of the present invention, the light intensity measurement unit measures the intensity of light in the wavelength region generated from the object when the object is irradiated with the first irradiation light; A second measuring unit that measures the intensity of light in the wavelength region generated from the object when the object is irradiated with second irradiation light having a spectrum different from that of the first irradiation light. The control unit includes an irradiation light selection unit that selects irradiation light corresponding to light having a large measurement value by comparing the measurement value by the first measurement unit with the measurement value by the second measurement unit. It is characterized by.
By comparing two measured values of the intensity of light in a specific wavelength region generated from the object, it is possible to easily select appropriate irradiation light.

In a preferred embodiment of the present invention, the light intensity measurement unit includes an optical filter that transmits light in the specific wavelength region, and a gain processing unit that can increase or decrease the amount of light in the specific wavelength region. To do.
As described above, the light intensity measurement unit includes the optical filter that transmits light in the specific wavelength region and the gain processing unit that can increase or decrease the light amount in the specific wavelength region, so that the specific object obtained from the target object can be obtained. The intensity (light quantity) in the wavelength region can be arbitrarily adjusted.

  In one form of this invention, the said control part is light of the said wavelength range which arises from this output object when the output value of each said light source calculated | required beforehand and the irradiation light of this output value are irradiated to a target object The output value of each light source is determined so as to increase the intensity of light in the wavelength region generated from the object, and a control signal is sent to the light source control unit. It is characterized by.

  The present invention includes an irradiation step of irradiating an object with light having different spectra, a light intensity measurement step of measuring the intensity of light in a wavelength region generated from the object, and a measurement value obtained in the light intensity measurement step. And a control step of controlling the intensity of light in the wavelength region of 460 to 500 nm in the wavelength region to be increased.

In a preferred embodiment of the present invention, the irradiation light is emitted so that the intensity of light in the wavelength region generated from the object is increased by repeatedly performing the irradiation step, the light intensity measurement step, and the control step. It is characterized by selecting.
By repeating these steps, it is possible to select irradiation light that is relatively appropriate for the irradiation light previously irradiated.

In a preferred embodiment of the present invention, the light intensity measurement step includes a first measurement step of measuring the intensity of light in the wavelength region generated from the object when the first irradiation light is irradiated on the object; A second measurement step of measuring the intensity of light in the wavelength region generated from the object when the object is irradiated with second irradiation light having a spectrum different from that of the first irradiation light. In the control step, by comparing the measurement value obtained in the first measurement step and the measurement value obtained in the second measurement step, the irradiation light corresponding to the light having a large measurement value is selected. It has the light selection process, It is characterized by the above-mentioned.
By such a method, it is possible to easily select relatively appropriate irradiation light. Further, by repeating this, it is possible to easily bring the irradiation light closer to the optimum one.

In a preferred embodiment of the present invention, in the light intensity measurement step, a step of transmitting light in a specific wavelength region of 460 to 500 nm through the optical filter and a light amount of the transmitted specific wavelength region are increased by the gain processing unit. And performing the process.
As described above, the intensity of the specific wavelength region obtained from the object using the optical filter that transmits light in the specific wavelength region and the gain processing unit that can increase or decrease the light amount in the specific wavelength region of 460 to 500 nm. The (light quantity) can be increased arbitrarily. Therefore, it is possible to directly obtain a more beautiful skin image by causing a light receiving element such as a CCD image sensor to receive light in which the amount of light in the specific wavelength region is sufficiently increased.

  ADVANTAGE OF THE INVENTION According to this invention, the illumination which makes skin look beautiful according to a target object is realizable. In other words, the irradiation light can be made to order according to the object, and optimal illumination can be realized in shooting scenes in the fields of beauty and fashion.

It is a functional block diagram concerning Embodiment 1 of an illuminating device of the present invention. It is a schematic block diagram concerning Embodiment 1 of the illuminating device of this invention. It is a flowchart which shows an example of the illumination method which concerns on Embodiment 1 of the illuminating device of this invention. It is a schematic block diagram which concerns on Embodiment 2 of the illuminating device of this invention. It is a face photograph at the time of irradiating a face with 13 types of light having different color temperatures. It is a figure which shows the spectrum of 27 types of light which has a color temperature of 5000K. It is a photograph at the time of irradiating a face with 27 types of light having a color temperature of 5000 K and having different spectra. It is a figure which shows the reflected light spectrum obtained from the frame | frame at the time of irradiating the said 27 types of light to a face. A face photograph with a higher skin beauty score (condition 1, condition 4) and a face photograph with a lower score (condition 9). It is a figure which shows the reflected light spectrum obtained from a test subject's forehead in each said condition. In other subjects, a facial photograph with a higher skin beauty score (conditions 1 and 5) and a facial photograph with a lower score (conditions 6 and 7). It is a figure which shows the reflected light spectrum obtained from a test subject's forehead in each said condition. In other subjects, a facial photograph with a higher skin beauty score (conditions 1 and 4) and a facial photograph with a lower score (conditions 6 and 7). It is a figure which shows the reflected light spectrum obtained from a test subject's forehead in each said condition.

[1] Illuminating Device An embodiment of an illuminating device according to the present invention will be described below with reference to FIGS.
The illumination target of the illumination device 1 shown in the present embodiment is human skin.
As shown in FIG. 1, the illumination device 1 of the present invention includes an illumination unit 2, a light intensity measurement unit 3, and a control unit 4.

The illumination unit 2 generates irradiation light that irradiates the object S such as a person.
FIG. 2 is a block diagram illustrating a schematic configuration of the illumination device 1. As shown in the figure, the illumination unit 2 includes eight types of light sources 21 (1... 8) composed of LED elements that emit light having peaks at various wavelengths in the visible light region, and the light sources 21 (1 ... 8) ON / OFF, and a light source control unit 211 for controlling the light quantity and the like.

  In the present embodiment, one of the light sources 21 (1... 8) is an LED element that has a peak at a wavelength of 402 nm and emits violet light. By using a light source using a light emitting element having a peak in the wavelength range of 390 to 420 nm, the light source control unit 211 increases the intensity of light in the 460 to 500 nm wavelength region (specific wavelength region) generated from the object S. This makes it easier to control.

The light intensity measurement unit 3 measures the intensity of light in a specific wavelength region of 460 to 500 nm generated from the object S.
In the illumination device 1 shown in FIG. 2, the light intensity measurement unit 3 forms an image of a light amount adjuster 310 that adjusts the amount of light from the outside according to the aperture of the diaphragm, and light whose light amount has been adjusted by the light amount adjuster 310. The refracting lens 320, the etalon (filter) 330 that selects the range of wavelengths to be transmitted with respect to the light from the lens 320, and the light of the wavelength component that has passed through the etalon 330 and receiving the received light intensity. A light receiving element 340 that outputs an analog signal. As the light receiving element 340, a CCD image sensor capable of outputting an analog signal indicating the received light intensity (light quantity) for each light receiving position is used.

  In addition, the light intensity measuring unit 3 selects the wavelength by the etalon 330 by adjusting the optical gap provided in the etalon 330 by electrostatic attraction and the light amount controller control unit 311 that controls the opening degree of the light amount adjuster 310. An etalon control unit 331 for controlling the signal, an AD converter 350 for converting an analog signal from the light receiving element 340 into a digital signal, a light receiving element control unit 341 for controlling sensitivity by controlling a read cycle from the light receiving element 340, and And a gain processing unit 342 that adjusts the gain of the signal input from the AD converter 350.

  The light intensity measurement unit 3 includes a first measurement unit 361 that measures the light reception intensity of light generated from the object S when the first irradiation light is irradiated on the object S, and the second irradiation light. And a second measuring unit 362 that measures the light receiving intensity of light generated from the object S when the object S is irradiated.

The control unit 4 controls the spectrum of the irradiation light emitted from the illumination unit 2 based on the measurement value of the light intensity in the wavelength region of 460 to 500 nm measured by the light intensity measurement unit 3.
This is because the intensity of light in the wavelength region of 460 to 500 nm is closely related to the beauty of skin color, particularly the beauty of skin color of bare skin. As shown in the examples described later, the present inventors have newly found the relationship between the intensity of light in the wavelength region of 460 nm to 500 nm and the beauty of the skin.

  In the illumination device 1 shown in FIG. 2, the control unit 4 includes an irradiation light selection unit 410 that selects the light source 21 (1... 8) to be irradiated from the illumination unit 2, a storage device 420 that stores various data, And a calculation processing unit 430 using a digital signal processor (DSP) that performs various calculations.

  The irradiation light selection unit 410 selects the irradiation light corresponding to the larger measurement value by comparing the measurement value obtained by the first measurement unit 361 and the measurement value obtained by the second measurement unit 362. In this embodiment, since eight types of light sources 21 are provided, measurement and selection are sequentially repeated for these light sources, and the light source corresponding to the largest measured value is selected.

  The control unit 4 of the illuminating device 1 outputs a control signal to the etalon 330 via the etalon control unit 331, thereby arbitrarily setting the wavelength range of light passing through the etalon 330 within the visible light range (360 to 780 nm). Can be set.

Further, the storage device 420 has an output value of the light source 21 (1... 8) and a wavelength region of 460 to 500 nm generated from the object S when the object S is irradiated with irradiation light of the output value. Reference data (table) 421 indicating the relationship of light intensity is stored.
Accordingly, the control unit 4 can refer to the table 421 and cause the calculation processing unit 430 to calculate the output value so that the light intensity in the wavelength region increases.

The light source control unit 211, the light amount controller control unit 311, the etalon control unit 331, the light receiving element control unit 341, the gain processing unit 342, the calculation processing unit 430, and the storage device 420 described above are controlled by the system control unit 5 using a computer. Centralized control.
In addition, the illumination device 1 includes a display unit 6 that displays various data, an image to be irradiated, and the like.

  By using the illumination device 1 described above, the irradiation light that makes the skin of the object S look more beautiful is selected, generated, and irradiated using the intensity of light in a specific wavelength region of 460 to 500 nm generated from the skin as an index. Is possible. Then, by the irradiation, the intensity of light in the wavelength region of 460 to 500 nm generated from the object S is increased, and an image that looks more beautiful can be displayed on the display unit 6.

[2] Illumination Method Next, an illumination method using the illumination device 1 will be described with reference to FIG.
This process is a process executed mainly by the system control unit 5. Here, for convenience of explanation, a case will be described in which the light source 21 includes a plurality (two types) of light sources having a spectrum used for general illumination.
First, the system control unit 5 selects any first irradiation light of the illumination unit 2 (for example, selects 1 of the light source 21), and irradiates the object S such as a person (step S10).

  Subsequently, among the components of light from the object S obtained as a result of the first measurement unit 361 of the light intensity measurement unit 3 irradiating the first irradiation light, a wavelength region of 460 to 500 nm which is a specific wavelength region. Is measured and the measured data is stored in the storage device 420 (step S11).

  Subsequently, the system control unit 5 selects the second irradiation light having a spectrum different from that of the first irradiation light (for example, selects 2 of the light source 21), and irradiates the object S such as a person (step S12). ).

  Subsequently, the second measuring unit 362 of the light intensity measuring unit 3 measures the light intensity in the wavelength region of 460 to 500 nm among the components of the light from the object S obtained as a result of irradiating the second irradiation light. Then, the data is stored in the storage device 420 (step S13).

  Subsequently, the irradiation light selection unit 410 of the control unit 4 reads and compares the two measurement data stored in the storage device 420 (step S14). As a result, when the measurement data D1 measured by the first measurement unit 361 is larger than the measurement data D2 measured by the second measurement unit 362, the control unit 4 selects the spectrum of the first irradiation light as the target. The spectrum of the irradiation light to be irradiated on the object S is determined and stored in the storage device 420 (step S15).

On the other hand, when the measurement data D1 is smaller than the measurement data D2 measured by the second measurement unit 362, the spectrum of the second irradiation light is determined as the spectrum of the irradiation light to be irradiated on the object S and stored. This is stored in the device 420 (step S16).

  Subsequently, in step S15, when the system control unit 5 determines the first irradiation light as the spectrum of the irradiation light to be irradiated on the object S, the system S 5 uses the first irradiation light. Is illuminated (step S17).

  On the other hand, when the system control unit 5 determines the second irradiation light as the spectrum of the irradiation light to be irradiated on the object S in step S16, the system control unit 5 uses the first irradiation light to determine the object S. Irradiate and illuminate (step S17).

  As shown in FIG. 2, when there are eight types of light sources 21 (1... 8), eight types of light sources are obtained by the first measurement unit 361, the second measurement unit 362, and the irradiation light selection unit 410. The measurement, comparison, and selection are sequentially repeated, and the light source corresponding to the largest measured value is selected, and the object S is irradiated with the selected light source for illumination.

In this way, by controlling the spectrum of the irradiation light so that the intensity of light in a specific wavelength region of 460 to 500 nm generated from the object S is increased, the light that makes the object S appear beautifully is controlled. Can do.
Thereby, according to the target object S, the illumination which makes skin look beautiful is realizable. That is, the irradiation light can be made to order according to the object S, and optimal illumination can be realized in the scene of photography in the fields of beauty and fashion.

In the illumination device 1 of the present embodiment, the light intensity measurement unit 3 includes an etalon 330 and an etalon control unit 331 that are optical filters that transmit light in a selected wavelength region, and a gain processing unit that can increase or decrease the light amount in the wavelength region. 342.
As described above, the light intensity measurement unit 3 includes the optical filter that transmits light in the specific wavelength region and the gain processing unit 342 that can increase or decrease the light amount in the specific wavelength region, thereby obtaining from the object S. It is possible to arbitrarily adjust the intensity (light quantity) of a specific wavelength region.

  Therefore, by using this illumination device 1, the gain processing unit 6 can directly increase the intensity (light quantity) of light in a specific wavelength region of 460 to 500 nm generated from the object S. Thereby, the intensity | strength of the light of the 460-500 nm wavelength range which arises from the target object S is increased, and the image which looks more beautiful can be displayed on the display part 6. FIG. In this case, it is possible to easily obtain an image in which the skin looks more beautiful.

  In the present embodiment, the output value of the light source 21 (1... 8) and the 460 to 600 generated from the human skin when the irradiation light generated from the light source having the output value is applied to the human skin in advance. A method of referring to the table T showing the relationship with the intensity of light in the wavelength region of 500 nm can also be adopted. In this way, in the second and subsequent flows, the selection of the first irradiation light and the second irradiation light can be facilitated and the processing speed can be increased.

  FIG. 4 shows Embodiment 2 of the lighting device according to the present invention. In the figure, components that are basically the same as those of the first embodiment shown in FIG.

  In the second embodiment shown in FIG. 4, the configuration of the illumination unit 2 is different from that of the first embodiment. That is, the illumination unit 2 according to this embodiment includes two light sources 22 and 23 in the visible light region, a light source control unit 211, a filter 24 disposed on the irradiation side of the light source 23, and a filter control unit 25. have.

The light source control unit 211 includes ON / OFF control of the light sources 22 and 23 and a light amount adjustment function. Similarly to the etalon control unit 331, the filter control unit 25 controls the filter 24 and can sequentially switch the wavelength range of light in the visible light region irradiated from the light source 23 to the object S.
Therefore, here, in addition to the irradiation light R1 in the visible light region irradiated from the light source 22, the irradiation light synthesized from the irradiation light R2 in a specific wavelength range irradiated from the light source 23 and transmitted through the filter 24 is used. Can be generated.

  In the present embodiment, the filter 24, the filter control unit 25, the light sources 22, 23, and the light source control unit 211 of the illumination unit 2, the wavelength range selection unit that selects the wavelength range of the light that irradiates the object S, and the selected wavelength The light quantity adjusting means of the light source corresponding to the range is configured.

As described above, the illumination unit 2 includes the wavelength range selection unit for the light irradiating the object S and the light amount adjustment unit for the light source, so that the wavelength range of the light irradiating the object is sequentially selected by the wavelength range selection unit. By simply doing so, it becomes possible to irradiate light of various spectra. In this case, since it is not necessary to provide a large number of light sources, the size can be reduced accordingly.
The lighting device according to the present invention is not limited to human skin lighting technology, and can be applied to lighting technology for animal skin, fruit, or a photograph thereof as long as it can achieve beautiful lighting. is there.

<1> Analysis of relationship between color temperature and beauty of skin Thirteen kinds of light with different color temperatures between 2500 and 8000K are irradiated on the face of a specific subject (see FIG. 5), and the skin is Arranged in the order in which they look beautiful. As a result, it was found that the skin looks beautiful when exposed to light having a color temperature in the range of 4500 to 5500K, and that the skin looks most beautiful when exposed to light of 5000K.

<2> Analysis of Irradiation Light Spectrum Subsequently, 27 types of light having a color temperature of 5000 K (see FIG. 6) having different spectra were irradiated on the face of the subject (Conditions 1-27, see FIG. 7), and a specialized panelist. In order that the skin looks beautiful.
Subsequently, the relationship between the beauty of the skin and the reflected light spectrum was analyzed using the reflected light spectrum (FIG. 8) obtained from the forehead when the 27 types of light were applied to the face.
As a result, the higher the intensity of the reflected light in the wavelength region of 460 to 500 nm, the higher the evaluation of the beauty of the skin by a specialized panelist.
FIG. 9 shows a face photograph (condition 1, condition 4) taken under the higher conditions and a face photograph (condition 9) taken under the lower conditions in determining whether the skin looks beautiful. FIG. 10 shows a reflected light spectrum obtained from the subject's forehead under each of the above conditions. 9 and 10, it was found that there is a significant difference in the intensity of reflected light in the wavelength region of 460 to 500 nm between the upper condition and the lower condition in determining whether the skin looks beautiful.

  Similarly, the test was conducted using two other subjects. In any case, the greater the intensity of the reflected light in the wavelength region of 460 to 500 nm obtained from the skin, the greater the evaluation of the beauty of the skin by a specialized panelist. The result was high (FIGS. 11-14).

  INDUSTRIAL APPLICABILITY The present invention can be used in scenes such as lighting in aesthetic beauty scenes, various types of photography, and development of cosmetics.

DESCRIPTION OF SYMBOLS 1 Illuminating device 2 Illumination part 3 Light intensity measurement part 4 Control part 5 System control part 6 Display part 21,22,23 Light source 24 Filter 25 Filter control part 211 Light source control part 310 Light quantity adjuster 311 Light quantity adjuster control part 320 Etalon 330 Light receiving element 331 Etalon control unit 341 Light receiving element control unit 342 Gain processing unit 350 AD converter 361 First measurement unit 362 Second measurement unit 410 Irradiation light selection unit 420 Storage device 421 Table 430 Calculation processing unit

Claims (12)

An illumination unit capable of emitting light of different spectra;
A light intensity measuring unit that measures the intensity of light in a wavelength region generated from the object when the object is irradiated with irradiation light;
And a control unit configured to control the intensity of light in a specific wavelength region in the wavelength region based on a measurement value obtained by the light intensity measurement unit.   The lighting device according to claim 1, wherein the specific wavelength region is a wavelength range of 460 to 500 nm.   The illumination device according to claim 1, wherein the illumination unit includes a plurality of light sources having different peaks, and a light source control unit that controls an output value of each light source.   The said illumination part contains the wavelength range selection means which selects the wavelength range of the light irradiated to a target object, and the light quantity adjustment means of the light source corresponding to the selected wavelength range, The characterized by the above-mentioned. The lighting device described in 1.   The illumination device according to claim 1, wherein the irradiation light is light having a color temperature of 4500 to 5500K. The light intensity measurement unit is configured to measure the intensity of light in the wavelength region generated from the object when the object is irradiated with the first irradiation light;
A second measuring unit that measures the intensity of light in the wavelength region generated from the object when the object is irradiated with second irradiation light having a spectrum different from that of the first irradiation light. ,
The control unit includes an irradiation light selection unit that selects irradiation light corresponding to light having a large measurement value by comparing the measurement value by the first measurement unit and the measurement value by the second measurement unit. The lighting device according to any one of claims 1 to 5, wherein the lighting device is characterized.   The said light intensity measurement part has an optical filter which permeate | transmits the light of the said specific wavelength area | region, and a gain process part which can increase / decrease the light quantity of the said specific wavelength area | region, It is characterized by the above-mentioned. The lighting device according to any one of the above. The control unit shows a relationship between an output value of each light source that has been obtained in advance and an intensity of light in the wavelength region generated from the object when the object is irradiated with irradiation light of the output value. Browse the table
8. The output value of each light source is determined so as to increase the intensity of light in the wavelength region generated from the object, and a control signal is sent to the light source control unit. A lighting device according to claim 1.   Based on the irradiation step of irradiating the object with light of different spectrum, the light intensity measurement step of measuring the intensity of light in the wavelength region generated from the object, and the measurement value obtained in the light intensity measurement step, And a control step of controlling the intensity of light in the wavelength region of 460 to 500 nm in the wavelength region to increase.   The irradiation light is selected so that the intensity of the light in the wavelength region generated from the object is increased by repeatedly performing the irradiation step, the light intensity measurement step, and the control step. The illumination method according to claim 9.   The light intensity measurement step includes a first measurement step of measuring the intensity of light in the wavelength region generated from the object when the first irradiation light is irradiated on the object, and the first irradiation light. A second measurement step of measuring the intensity of light in the wavelength region generated from the target object when the target object is irradiated with second irradiation light having a different spectrum, and in the control step, Having an irradiation light selection step of selecting irradiation light corresponding to light having a large measurement value by comparing the measurement value obtained in the first measurement step with the measurement value obtained in the second measurement step; The illumination method according to claim 9 or 10.   In the light intensity measurement step, performing a step of transmitting light in a specific wavelength region of 460 to 500 nm through an optical filter and a step of increasing the amount of light of the transmitted specific wavelength region by a gain processing unit The illumination method according to any one of claims 9 to 11.