Optical dual brain signal tester

Abstract

The present invention relates to an optical fiber photometric measurement technique. An optical brain signal measurement device (100) according to one embodiment may comprise a light source unit (110), an excitation filter unit (120), a first split-splice unit (130), a second split-splice unit (140), an emission filter unit (150), and a measurement unit (160). The optical brain signal measurement device 100 transmits an optical signal to a brain signal measurement object through a directional optical fiber, divides or splices the signal through a dividing and splicing part, and recognizes a wavelength range corresponding to each of the multiple signals through an optical splitter, thereby eliminating a dichroic filter. Therefore, multiple brain signals (multiple light sources) can be obtained by using the light source directivity of the optical fiber and the optical splitter.

Description

Technical Field

[0001] The present invention relates to an optical brain signal measurement device and method, and more specifically, to a fiber optic photometry technology that utilizes the light source directionality and light source classification function of an optical fiber and a spectrometer to obtain multiple brain signals without a dichroic filter. Background Art

[0002] Fiber optic photometry technology uses an optical fiber to emit light to a target sample and receive the light through the optical fiber.

[0003] Because it can measure light signals generated deep within the brain of living animals, it is used to study neural activity.

[0004] Among non-invasive methods for measuring brain signals, there is a technique for extracting and amplifying optical brain response signals using a lock-in amplifier.

[0005] In the method of extracting and amplifying optical brain response signals using a lock-in amplifier, a photodetector is used.

[0006] There are some technologies, such as: a method of measuring brain signals by adding a 405nm light source to remove autofluorescence and noise; and a method of using multimode fiber to transmit brain signals from multiple regions (multiple objects) to a CMOS camera instead of a photodetector, and using software to measure them as regional light source values.

[0007] The fluorescence intensity recorded by the CMOS camera is optically calculated and defined as the brain signal. This is not the actual measured light source value. Since the calculated value is stored as the brain signal, there is a time difference between the measured value and the calculated value.

[0008] Fiber photometry, which optically records brain signals and includes non-invasive methods for measuring brain signals, requires the use of excitation filters, dichroic filters, and emission filters because filters are needed to set the directionality and wavelength range of light.

[0009] According to existing technologies, in order to use multimode optical fibers to record multiple areas and multiple objects, additional dichroic lenses are required. In order to record multiple brain signals generated by the increase in light sources, additional lenses, dichroic filters and photodetectors are required. Summary of the Invention

[0010] Technical issues

[0011] The purpose of the present invention is to obtain multiple brain signals by utilizing the light source directionality and light source classification function of optical fiber and a spectrometer without a dichroic filter.

[0012] The object of the present invention is to provide a fiber photometry technology that obtains multiple brain signals using optical fibers with specific directionality and filtering functions without various lenses and filters.

[0013] The object of the present invention is to provide an optical brain signal measuring device and method with a light source that does not require various filter configurations, is intuitive and simple, and can simultaneously record multiple brain signals.

[0014] Means of solving the problem

[0015] According to one embodiment of the present invention, an optical brain signal measuring device may include: a light source unit, which inputs a light signal of a first wavelength and a light signal of a second wavelength; an excitation filter unit, which allows the light signal of the first wavelength to pass through in a first wavelength range, and allows the light signal of the second wavelength to pass through in a second wavelength range; a first splitting and splicing unit, which receives the light signal passing through in the first wavelength range and the light signal passing through in the second wavelength range based on the first directivity of the optical fiber, and outputs a spliced ​​signal obtained by splicing the received light signals or a split signal obtained by splitting the spliced ​​signal; a second splitting and splicing unit, which transmits any one of the spliced ​​signal and the split signal to at least one brain signal measuring object based on the first directivity of the optical fiber, and transmits a measurement signal returned from the at least one brain signal measuring object based on the second directivity of the optical fiber; an emission filter unit, which allows the transmitted measurement signal to pass through in at least one wavelength range of a third wavelength range and a fourth wavelength range; and a measuring unit, which measures at least one brain signal of the at least one brain signal measuring object based on the measurement signal passed through in the at least one wavelength range.

[0016] The first directivity of the optical fiber may indicate a directionality of transmitting the optical signal from the light source portion to the excitation filter portion, from the excitation filter portion to the first splitting and splicing portion, from the first splitting and splicing portion to the second splitting and splicing portion, and from the second splitting and splicing portion to the at least one brain signal measurement object. The second directivity of the optical fiber may indicate a directionality of transmitting the optical signal returned from the at least one brain signal measurement object to the second splitting and splicing portion, from the second splitting and splicing portion to the emission filter portion, and from the emission filter portion to the measurement portion.

[0017] When the at least one brain signal measurement subject is a plurality of brain signal measurement subjects, the second dividing and splicing unit, the emission filter unit, and the measurement unit may be additionally configured according to the number of the plurality of brain signal measurement subjects.

[0018] When the at least one brain signal measurement object is a single brain signal measurement object, the first segmentation and splicing unit may output a spliced ​​signal for splicing the received optical signals; and when the at least one brain signal measurement object is a plurality of brain signal measurement objects, the first segmentation and splicing unit may output a segmentation signal for segmenting the spliced ​​signal.

[0019] The first segmentation and splicing unit may adjust the segmentation ratio of the segmented signal to any one of 1:10 to 10:1.

[0020] When the measurement signal transmitted in the at least one wavelength range is within a plurality of wavelength ranges, the measurement unit may be a spectrometer. When the measurement signal transmitted in the at least one wavelength range is within a single wavelength range, the measurement unit may be a photodetector.

[0021] According to one embodiment of the present invention, an optical brain signal measuring device may include: a light source unit, which transmits the optical signal of the first wavelength and the optical signal of the second wavelength through a first optical fiber that transmits an optical signal with a first directivity, which transmits the optical signal of the first wavelength in a first wavelength range and transmits the optical signal of the second wavelength in a second wavelength range; a first splitting and splicing unit, which outputs a spliced ​​signal of the optical signal transmitted in the first wavelength range and the optical signal transmitted in the second wavelength range or a split signal of splitting the spliced ​​signal through the first optical fiber; a second splitting and splicing unit, which transmits any one of the spliced ​​signal and the split signal to at least one brain signal measurement object through the first optical fiber, and transmits a measurement signal returned from the at least one brain signal measurement object through the second optical fiber that transmits the measurement signal in at least one wavelength range of the third wavelength range and the fourth wavelength range and transmits in the second directionality; and a measuring unit, which measures at least one brain signal of the at least one brain signal measurement object based on the transmitted measurement signal.

[0022] The first directionality may represent the directionality of transmitting the light signal from the light source part to the first splitting and splicing part, from the first splitting and splicing part to the second splitting and splicing part, and from the second splitting and splicing part to the at least one brain signal measurement object. The second directionality may represent the directionality of transmitting the light signal returned from the at least one brain signal measurement object to the second splitting and splicing part, and from the second splitting and splicing part to the measurement part.

[0023] When the at least one brain signal measurement subject is a plurality of brain signal measurement subjects, the second dividing and splicing unit and the measurement unit may be additionally configured according to the number of the plurality of brain signal measurement subjects.

[0024] When the at least one brain signal measurement object is a single brain signal measurement object, the first segmentation and splicing unit may output a spliced ​​signal for splicing the received optical signals; and when the at least one brain signal measurement object is a plurality of brain signal measurement objects, the first segmentation and splicing unit may output a segmentation signal for segmenting the spliced ​​signal.

[0025] The first segmentation and splicing unit may adjust the segmentation ratio of the segmented signal to any one of 1:10 to 10:1.

[0026] The measuring unit may be at least one of a spectrometer and a photodetector.

[0027] According to one embodiment of the present invention, an optical brain signal measurement method may include: a step of inputting a light signal of a first wavelength and a light signal of a second wavelength in a light source section; a step of transmitting the light signal of the first wavelength in a first wavelength range and transmitting the light signal of the second wavelength in a second wavelength range in an excitation filter section; a step of receiving, in a first splitting and splicing section, a light signal transmitted in the first wavelength range and a light signal transmitted in the second wavelength range based on a first directivity of an optical fiber, and outputting a spliced ​​signal obtained by splicing the received light signals or a split signal obtained by splitting the spliced ​​signal; a step of transmitting, in a second splitting and splicing section, any one of the spliced ​​signal and the split signal to at least one brain signal measurement object based on the first directivity of the optical fiber, and transmitting a measurement signal returned from the at least one brain signal measurement object based on the second directivity of the optical fiber; a step of transmitting, in an emission filter section, the transmitted measurement signal in at least one wavelength range of a third wavelength range and a fourth wavelength range; and a step of measuring, in a measurement section, at least one brain signal of the at least one brain signal measurement object based on the measurement signal transmitted in the at least one wavelength range.

[0028] The first directivity of the optical fiber may indicate a directionality of transmitting the optical signal from the light source portion to the excitation filter portion, from the excitation filter portion to the first splitting and splicing portion, from the first splitting and splicing portion to the second splitting and splicing portion, and from the second splitting and splicing portion to the at least one brain signal measurement object. The second directivity of the optical fiber may indicate a directionality of transmitting the optical signal returned from the at least one brain signal measurement object to the second splitting and splicing portion, from the second splitting and splicing portion to the emission filter portion, and from the emission filter portion to the measurement portion.

[0029] According to one embodiment of the present invention, the optical brain signal measuring method may include: in a light source section, a step of transmitting an optical signal of the first wavelength and an optical signal of the second wavelength through a first optical fiber that transmits an optical signal in a first directionality so as to transmit an optical signal of the first wavelength in a first wavelength range and an optical signal of the second wavelength in a second wavelength range; in a first splitting and splicing section, a step of outputting a spliced ​​signal obtained by splicing the optical signal transmitted in the first wavelength range and the optical signal transmitted in the second wavelength range or a split signal obtained by splitting the spliced ​​signal through the first optical fiber; in a second splitting and splicing section, a step of transmitting any one of the spliced ​​signal and the split signal to at least one brain signal measuring object through the first optical fiber, a step of transmitting a measurement signal returned from the at least one brain signal measuring object through a second optical fiber that transmits the measurement signal in at least one wavelength range of a third wavelength range and a fourth wavelength range and transmits in a second directionality; and in a measuring section, a step of measuring at least one brain signal of the at least one brain signal measuring object based on the transmitted measurement signal.

[0030] The first directivity of the optical fiber may indicate a directionality of transmitting the optical signal from the light source portion to the excitation filter portion, from the excitation filter portion to the first splitting and splicing portion, from the first splitting and splicing portion to the second splitting and splicing portion, and from the second splitting and splicing portion to the at least one brain signal measurement object. The second directivity of the optical fiber may indicate a directionality of transmitting the optical signal returned from the at least one brain signal measurement object to the second splitting and splicing portion, from the second splitting and splicing portion to the emission filter portion, and from the emission filter portion to the measurement portion.

[0031] Effects of the Invention

[0032] The present invention can obtain multiple brain signals by utilizing the light source directionality and light source classification function of the optical fiber and the spectrometer without a dichroic filter.

[0033] The present invention can provide a fiber photometry technology that obtains multiple brain signals using optical fibers with specific directionality and filter functions without various lenses and filters.

[0034] The present invention can provide an optical brain signal measuring device and method with a light source that does not require various filter configurations, is intuitive and simple, and can simultaneously record multiple brain signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figures 1 to 8 This is a diagram illustrating an optical brain signal measuring device according to an embodiment of the present invention.

[0036] Figure 9 and Figure 10 A diagram illustrating an optical brain signal measurement method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0037] An optical brain signal measuring device, comprising:

[0038] a light source portion for inputting an optical signal of a first wavelength and an optical signal of a second wavelength;

[0039] an excitation filter portion that transmits light signals of the first wavelength in a first wavelength range and transmits light signals of the second wavelength in a second wavelength range;

[0040] a first splitting and splicing section that receives an optical signal transmitted in the first wavelength range and an optical signal transmitted in the second wavelength range based on a first directivity of the optical fiber, and outputs a spliced ​​signal obtained by splicing the received optical signals or a split signal obtained by splitting the spliced ​​signal;

[0041] a second splitting and splicing unit that transmits either the spliced ​​signal or the split signal to at least one brain signal measurement subject based on the first directivity of the optical fiber, and transmits a measurement signal returned from the at least one brain signal measurement subject based on the second directivity of the optical fiber;

[0042] an emission filter portion that transmits the transmitted measurement signal in at least one of a third wavelength range and a fourth wavelength range; and

[0043] The measurement unit measures at least one brain signal of the at least one brain signal measurement subject based on the measurement signal transmitted in the at least one wavelength range.

[0044] The specific structural or functional descriptions of the embodiments according to the inventive concept disclosed in this specification are only exemplified to illustrate the embodiments of the inventive concept. The embodiments according to the inventive concept can be implemented in various forms and are not limited to the embodiments described in this specification.

[0045] The embodiments of the present invention are susceptible to various modifications and forms, and thus, embodiments will be illustrated in the accompanying drawings and described in detail in this specification. However, this is not intended to limit the embodiments of the present invention to the specific disclosed forms, but rather to encompass modifications, equivalents, or alternatives within the spirit and technical scope of the present invention.

[0046] Although terms such as "first" or "second" may be used to describe various structural elements, the structural elements should not be limited by these terms. The terms are only used to distinguish one structural element from another structural element. For example, a first structural element may be named "second structural element" and similarly, a second structural element may be named "first structural element" without departing from the scope of the present invention.

[0047] When a structural element is referred to as being "connected" or "connected" to another structural element, it should be understood that it can be directly connected or connected to the other structural element, but other structural elements may exist in between. Conversely, when a structural element is referred to as being "directly connected" or "directly connected" to another structural element, it should be understood that no other structural elements exist in between. Expressions describing the relationship between structural elements, such as "between," "immediately adjacent to," or "directly adjacent to," should be interpreted similarly.

[0048] The terms used in this specification are intended only to describe specific embodiments and are not intended to limit the present invention. Unless the context clearly indicates otherwise, singular expressions include plural expressions. In this specification, terms such as "including" or "having" are intended to indicate the presence of the described feature, number, phase, operation, structural element, component, or combination thereof, and do not preclude the presence or additional possibility of one or more other features, numbers, phases, operations, structural elements, components, or combinations thereof.

[0049] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms defined in commonly used dictionaries, etc., should be interpreted as having a meaning consistent with that in the context of the relevant technology and should not be interpreted as idealized or overly formalized unless explicitly defined in this specification.

[0050] Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings. However, the scope of the patent application is not limited or defined by these embodiments. The same reference numerals shown in the various drawings represent the same components.

[0051] Figures 1 to 8 This is a diagram illustrating an optical brain signal measuring device according to an embodiment of the present invention.

[0052] Figure 1 The present invention illustrates the structural elements of an optical brain signal measurement device that uses the light source directivity of an optical fiber and a spectrometer to obtain multiple brain signals (multiple light source) without a dichroic filter, according to one embodiment of the present invention.

[0053] Reference Figure 1According to one embodiment of the present invention, an optical brain signal measuring device 100 may include a light source unit 110, an excitation filter unit 120, a first splitting and splicing unit 130, a second splitting and splicing unit 140, an emission filter unit 150 and a measuring unit 160.

[0054] The light source unit 110 according to one embodiment of the present invention inputs an optical signal of a first wavelength and an optical signal of a second wavelength.

[0055] For example, the first wavelength may be a wavelength of 405 nm or 465 nm, and the second wavelength may be 473 nm or 560 nm.

[0056] For example, the light source unit 110 may include a first light source that inputs an optical signal of a first wavelength and a second light source that inputs an optical signal of a second wavelength.

[0057] The excitation filter unit 120 according to one embodiment of the present invention transmits a light signal with a first wavelength in a first wavelength range, and transmits a light signal with a second wavelength in a second wavelength range.

[0058] The first wavelength range may be 400 nm to 410 nm or 445 nm to 475 nm, and the second wavelength range may be 465 nm to 495 nm or 555 nm to 565 nm.

[0059] As an example, the excitation filter unit 120 may include an excitation filter that transmits an optical signal of a first wavelength in a first wavelength range and an excitation filter that transmits an optical signal of a second wavelength in a second wavelength range.

[0060] According to one embodiment of the present invention, the first splitting and splicing section 130 can receive optical signals transmitted in the first wavelength range and optical signals transmitted in the second wavelength range based on the first directivity of the optical fiber, and output a spliced ​​signal that splices the received optical signals or a split signal that splits the spliced ​​signal.

[0061] For example, the first directionality of the optical fiber can represent the directionality of transmitting the light signal from the light source part to the excitation filter part 120, from the excitation filter part 120 to the first split splicing part 130, from the first split splicing part 130 to the second split splicing part 140, and from the second split splicing part 140 to at least one brain signal measurement object.

[0062] According to one embodiment of the present invention, when at least one brain signal measurement object is a brain signal measurement object, the first segmentation and splicing unit 130 can output a spliced ​​signal of splicing the received optical signals; when at least one brain signal measurement object is multiple brain signal measurement objects, it can output a segmentation signal of the segmented spliced ​​signal.

[0063] For example, the first segmentation and splicing unit 130 may adjust the segmentation ratio of the segmented signal to any segmentation ratio between 1:10 and 10:1.

[0064] For example, when the first splitting and splicing unit 130 splits and splices the signal and outputs the split signals to two lines, the output ratio of the optical signal transmitted to each line is adjusted to any split ratio between 1:10 and 10:1.

[0065] That is, the first splitting and splicing unit 130 can increase the maximum output signal by adjusting the output ratio of the optical signal, for example, adjusting it to 25:75, 10:90, 50:50, etc.

[0066] The numerical range related to the output ratio of the optical signal is not limited to the above range, and various adjustments can be made within a range that can increase the maximum output signal.

[0067] According to one embodiment of the present invention, the second splitting and splicing unit 140 can transmit any one of the splicing signal and the split signal to at least one brain signal measurement object based on the first directionality of the optical fiber, and transmit the measurement signal returned from at least one brain signal measurement object based on the second directionality of the optical fiber.

[0068] As an example, the second splitting and splicing unit 140 may output a spliced ​​signal obtained by splicing the transmitted optical signals or output a split signal obtained by splitting the spliced ​​signal, similar to the first splitting and splicing unit 130 .

[0069] For example, the second directionality of the optical fiber can represent the directionality of transmitting the optical signal returned from at least one brain signal measurement object to the second splitting and splicing part 144, from the second splitting and splicing part 144 to the emission filter part 150, and from the emission filter part 150 to the measurement part 160.

[0070] For example, when at least one brain signal measurement subject is a plurality of brain signal measurement subjects, the second dividing and splicing unit 140 , the emission filter unit 150 , and the measurement unit 160 may be additionally configured according to the number of the plurality of brain signal measurement subjects.

[0071] According to one embodiment of the present invention, the emission filter unit 150 can transmit the transmitted measurement signal in at least one wavelength range of the third wavelength range and the fourth wavelength range.

[0072] For example, the third wavelength range may be 505 nm to 545 nm, and the fourth wavelength range may be 575 nm to 710 nm.

[0073] According to an embodiment of the present invention, the measurement unit 160 may measure at least one brain signal of at least one brain signal measurement subject based on a measurement signal transmitted in at least one wavelength range.

[0074] For example, when the measurement signal transmitted in at least one wavelength range exists in multiple wavelength ranges, the measurement unit 160 may use a spectrometer, and when the measurement signal transmitted in at least one wavelength range exists in one wavelength range, a photodetector may be used.

[0075] According to one embodiment of the present invention, the optical brain signal measuring device 100 can transmit optical signals to the brain signal measurement object through a directional optical fiber, split or splice the signals through a splitting and splicing part, and identify the wavelength range corresponding to each signal in the multiple signals through a spectrometer, thereby obtaining multiple brain signals (multiple light sources) by utilizing the light source directionality of the optical fiber and the spectrometer without a dichroic filter.

[0076] Figure 2 The present invention illustrates a connection circuit of an optical brain signal measuring device that uses the light source directionality of an optical fiber and a spectrometer to obtain multiple brain signals (multiple light sources) without a dichroic filter, according to one embodiment of the present invention.

[0077] Reference Figure 2 According to one embodiment of the present invention, the optical brain signal measuring device 200 can be composed of a first light source 210, a second light source 211, a first excitation filter 220, a second excitation filter 221, a first splitting and splicing part 230, a second splitting and splicing part 240, an emission filter 260 and a measuring part 270.

[0078] The light input from the first light source 210 and the second light source 211 passes through the first excitation filter 220 and the second excitation filter 221 , and the optical signal is transmitted to the first splitting and splicing portion 230 based on the first directivity of the optical fiber connecting each structure.

[0079] The first wavelength of the light source input by the first light source 210 may be 405 nm or 465 nm, and the second wavelength of the light source input by the second light source 211 may be 473 nm or 560 nm.

[0080] The first excitation filter 220 transmits light in a first wavelength range, which may be 400 nm to 410 nm or 445 nm to 475 nm.

[0081] The second excitation filter 221 transmits light in a second wavelength range, which may be 465 nm to 495 nm or 555 nm to 565 nm.

[0082] The first splitting and splicing section 230 transmits the spliced ​​signal to the second splitting and splicing section 240 based on the first directivity.

[0083] The second dividing and splicing unit 240 transmits the optical signal to the brain signal measurement subject 250 based on the first directivity, receives the measurement signal returned from the brain signal measurement subject 250 based on the second directivity, and transmits the received measurement signal to the emission filter 260 .

[0084] The emission filter 260 transmits the transmitted measurement signal in at least one wavelength range of the third wavelength range and the fourth wavelength range.

[0085] For example, the third wavelength range may be 505 nm to 545 nm, and the fourth wavelength range may be 575 nm to 710 nm.

[0086] When the measurement signal transmitted in at least one wavelength range exists in a plurality of wavelength ranges, the measurement unit 270 may use a spectrometer. When the measurement signal transmitted in at least one wavelength range exists in one wavelength range, a photodetector may be used.

[0087] When the measurement signal is a brain signal in a single wavelength range, the measurement unit 270 senses it using a photodetector. When the measurement signal is two or more brain signals in a plurality of wavelength ranges, the measurement unit senses it using a spectrometer.

[0088] Figure 3 An example is provided of a connection circuit of an optical brain signal measuring device that uses the light source directionality of an optical fiber and a spectrometer to obtain multiple brain signal (multiple light source) signals from multiple parts of a brain signal measurement object without a dichroic filter according to one embodiment of the present invention.

[0089] Reference Figure 3 According to one embodiment of the present invention, the optical brain signal measuring device 300 can be composed of a first light source 310, a second light source 311, a first excitation filter 320, a second excitation filter 321, a first splitting and splicing part 330, a second splitting and splicing part 340 and a second splitting and splicing part 341, an emission filter 360, an emission filter 361, a measuring part 370 and a measuring part 371.

[0090] Light input from the first light source 310 and the second light source 311 passes through the first excitation filter 320 and the second excitation filter 321 , and the optical signal is transmitted to the first division and splicing portion 330 based on the first directivity of the optical fiber connecting each component.

[0091] The first wavelength of the light source input by the first light source 310 may be 405 nm or 465 nm, and the second wavelength of the light source input by the second light source 311 may be 473 nm or 560 nm.

[0092] The first excitation filter 320 transmits a first wavelength range, which may be 400 nm to 410 nm or 445 nm to 475 nm.

[0093] The second excitation filter 321 transmits light in a second wavelength range, which may be 465 nm to 495 nm or 555 nm to 565 nm.

[0094] The first segmentation and splicing unit 330 transmits the segmentation signal based on the first direction to the second segmentation and splicing unit 340 and the second segmentation and splicing unit 341. For example, the segmentation signal may be a signal segmented at the same ratio, and the segmentation ratio may be determined based on a user setting.

[0095] As an example, the first segmentation and splicing unit 330 may adjust the segmentation ratio of the segmented signal to any segmentation ratio between 1:10 and 10:1.

[0096] For example, when the first splitting and splicing unit 330 splits and splices the signal and outputs the split signals to two lines, the output ratio of the optical signal transmitted to each line is adjusted to any split ratio between 1:10 and 10:1.

[0097] That is, the first splitting and splicing unit 330 can increase the maximum output signal by adjusting the output ratio of the optical signal, for example, 25:75, 10:90, 50:50, etc.

[0098] The second splitting and splicing unit 340 and the second splitting and splicing unit 341 transmit the optical signal to multiple parts of the brain signal measurement object 350 based on the first directionality, receive the measurement signal returned from the brain signal measurement object 350 based on the second directionality, and transmit the received measurement signal to the emission filter 360 and the emission filter 361.

[0099] The emission filter 360 and the emission filter 361 transmit the transmitted measurement signal in at least one wavelength range of the third wavelength range and the fourth wavelength range.

[0100] For example, the third wavelength range may be 505 nm to 545 nm, and the fourth wavelength range may be 575 nm to 710 nm.

[0101] When the measurement signal transmitted in at least one wavelength range exists in multiple wavelength ranges, the measurement units 370 and 371 may use a spectrometer. When the measurement signal transmitted in at least one wavelength range exists in one wavelength range, a photodetector may be used.

[0102] When the measurement signal is a brain signal in a single wavelength range, the measurement units 370 and 371 use photodetectors for sensing. When the measurement signal is two or more brain signals in multiple wavelength ranges, a spectrometer can be used for sensing.

[0103] Figure 4 The present invention illustrates an embodiment of an optical brain signal measuring device that uses the light source directionality of an optical fiber and a spectrometer to obtain multiple brain signal (multiple light source) signals from multiple brain signal measurement objects without a dichroic filter.

[0104] Reference Figure 4 According to one embodiment of the present invention, the optical brain signal measuring device 400 can be composed of a first light source 410, a second light source 411, a first excitation filter 420, a second excitation filter 421, a first splitting and splicing part 430, a second splitting and splicing part 440 and a second splitting and splicing part 441, an emission filter 460, an emission filter 461, a measuring part 470 and a measuring part 471.

[0105] According to one embodiment of the present invention, the optical brain signal measuring device 400 and Figure 3 The optical brain signal measurement device 300 described in operates in the same manner and can measure brain signals from the brain signal measurement subject 450 and the brain signal measurement subject 451 .

[0106] Figure 5 The present invention illustrates structural elements of an optical brain signal measuring device for acquiring multiple brain signals using optical fibers with a light source classification function without dichroic filters, excitation filters, and emission filters according to one embodiment of the present invention.

[0107] Reference Figure 5 According to one embodiment of the present invention, an optical brain signal measuring device 500 includes a light source unit 510, a first splitting and splicing unit 520, a second splitting and splicing unit 530, and a measuring unit 540. The light source unit 510, the first splitting and splicing unit 520, and the second splitting and splicing unit 530 are connected by a first optical fiber 550, and the second splitting and splicing unit 530 and the measuring unit 540 can be connected by a second optical fiber 551.

[0108] According to one embodiment of the present invention, the light source unit 510 can transmit the optical signal of the first wavelength and the optical signal of the second wavelength through the first optical fiber 550 that transmits the optical signal in a first directionality, allowing the optical signal of the first wavelength to pass through in a first wavelength range and allowing the optical signal of the second wavelength to pass through in a second wavelength range.

[0109] For example, the first splitting and splicing unit 520 outputs a spliced ​​signal obtained by splicing an optical signal transmitted in the first wavelength range and an optical signal transmitted in the second wavelength range, or a split signal obtained by splitting the spliced ​​signal, through the first optical fiber 550 .

[0110] As an example, the first segmentation and splicing unit 520 may adjust the segmentation ratio of the segmented signal to any segmentation ratio between 1:10 and 10:1.

[0111] For example, when the first splitting and splicing unit 520 splits and splices the signal and outputs the split signals to two lines, the output ratio of the optical signal transmitted to each line is adjusted to any split ratio between 1:10 and 10:1.

[0112] That is, the first splitting and splicing unit 520 can increase the maximum output signal by adjusting the output ratio of the optical signal, for example, 25:75, 10:90, 50:50, etc.

[0113] The numerical range related to the output ratio of the optical signal is not limited to the above range, and various adjustments can be made within a range that can increase the maximum output signal.

[0114] According to one embodiment of the present invention, the second splitting and splicing unit 530 transmits any one of the spliced ​​signal and the split signal to at least one brain signal measurement subject through the first optical fiber 550 .

[0115] As an example, the second splitting and splicing unit 140 may output a spliced ​​signal obtained by splicing the transmitted optical signals or output a split signal obtained by splitting the spliced ​​signal, similar to the first splitting and splicing unit 130 .

[0116] Furthermore, the second splitting and splicing section 530 may transmit a measurement signal from at least one brain signal measurement object, which is returned through the second optical fiber that transmits the measurement signal in at least one wavelength range of the third wavelength range and the fourth wavelength range and transmits in the second directionality.

[0117] According to one embodiment of the present invention, the measurement unit 540 may measure at least one brain signal of at least one brain signal measurement subject based on the transmitted measurement signal.

[0118] According to one embodiment of the present invention, when the wavelength of the light source input by the first light source is 465nm and the wavelength of the light source input by the second light source is 560nm, the first optical fiber 550 classifies and transmits the wavelengths of the light sources, so that the wavelength range of the spliced ​​signal in the first split splicing part 520 is 473nm to 561nm.

[0119] According to one embodiment of the present invention, the second optical fiber 551 classifies and transmits the wavelength of the light source, so that the wavelength range of the measurement signal transmitted to the measurement unit 540 is 532 nm to 670 nm.

[0120] According to one embodiment of the present invention, the optical brain signal measuring device 500 transmits optical signals to the brain signal measurement object through an optical fiber with directionality and wavelength transmission (classification) functions, splits or splices the signals through a splitting and splicing part, and identifies the wavelength range corresponding to each signal in the multiple signals through a spectrometer, thereby obtaining multiple brain signals (multiple light source) signals without a dichroic filter, an excitation filter, and an emission filter.

[0121] Figure 6 The invention illustrates a connection circuit of an optical brain signal measuring device for acquiring multiple brain signals using optical fibers with a light source classification function without a dichroic filter, an excitation filter, and an emission filter according to an embodiment of the present invention.

[0122] Reference Figure 6 According to one embodiment of the present invention, the optical brain signal measuring device 600 can be composed of a first light source 610, a second light source 611, a first splitting and splicing part 630, a second splitting and splicing part 640 and a measuring part 670.

[0123] The optical signal 620 transmitted by the first light source 610 in a wavelength range after passing through the first optical fiber and the optical signal 621 transmitted by the second light source 611 in a wavelength range after passing through the first optical fiber are transmitted to the first splitting and splicing part 630, and the optical signal 620 and the optical signal 621 spliced ​​in the first splitting and splicing part 630 are transmitted to the second splitting and splicing part 640.

[0124] The second splitting and splicing unit 640 transmits the optical signals 620 and 621 to the brain signal measurement object 650 , and transmits the optical signals 660 and 661 that pass through the second optical fiber in the wavelength range to the measurement unit 670 .

[0125] According to one embodiment of the present invention, the optical brain signal measuring device 600 is a fiber optic photometry technology that utilizes the directionality of the light source and a multifunctional optical fiber that only transmits light sources of specific wavelengths. It does not have dichroic filters, excitation filters, and emission filters, and can also record multiple brain signal light sources.

[0126] According to one embodiment of the present invention, in the first optical fiber associated with optical signal 620 and optical signal 621, when the wavelength of the first light source input is 465 nm and the wavelength of the second light source input is 560 nm, the wavelengths of the light sources are classified and transmitted so that the wavelength range of the spliced ​​signal spliced ​​in the first split splicing part 630 is 473 nm to 561 nm.

[0127] According to one embodiment of the present invention, the second optical fiber associated with the optical signal 660 and the optical signal 661 classifies and transmits the wavelength of the light source, so that the wavelength range of the measurement signal transmitted to the measurement unit 670 is 532 nm to 670 nm.

[0128] Figure 7 An example of a connection circuit of an optical brain signal measuring device for acquiring multiple brain signals of multiple parts of a brain signal measuring object using an optical fiber with a light source classification function in the absence of a dichroic filter, an excitation filter, and an emission filter according to one embodiment of the present invention is illustrated.

[0129] Reference Figure 7 According to one embodiment of the present invention, the optical brain signal measuring device 700 can be composed of a first light source 710, a second light source 711, a first splitting and splicing part 730, a second splitting and splicing part 740 and a second splitting and splicing part 741 and a measuring part 770 and a measuring part 771.

[0130] The optical signal 720 transmitted by the first light source 710 in a wavelength range after passing through the first optical fiber and the optical signal 721 transmitted by the second light source 711 in a wavelength range after passing through the first optical fiber are transmitted to the first splitting and splicing part 730, and the optical signal 720 and the optical signal 721 split in the first splitting and splicing part 730 are transmitted to the second splitting and splicing part 740 and the second splitting and splicing part 741.

[0131] As an example, the first segmentation and splicing unit 730 may adjust the segmentation ratio of the segmented signal to any segmentation ratio between 1:10 and 10:1.

[0132] For example, when the first splitting and splicing unit 730 splits and splices the signal and outputs the split signals to two lines, the output ratio of the optical signal transmitted to each line is adjusted to any split ratio between 1:10 and 10:1.

[0133] That is, the first splitting and splicing unit 730 can increase the maximum output signal by adjusting the output ratio of the optical signal, for example, 25:75, 10:90, 50:50, etc.

[0134] The numerical range related to the output ratio of the optical signal is not limited to the above range, and various adjustments can be made within a range that can increase the maximum output signal.

[0135] The second splitting and splicing unit 740 transmits the optical signals 720 and 721 to the brain signal measurement object 750 , and transmits the optical signals 760 and 761 that pass through the second optical fiber in a wavelength range to the measurement units 770 and 771 .

[0136] As an example, the second splitting and splicing unit 740 may output a spliced ​​signal obtained by splicing the transmitted optical signals or output a split signal obtained by splitting the spliced ​​signal, similar to the first splitting and splicing unit 730 .

[0137] Figure 8 An example is provided of a connection circuit of an optical brain signal measuring device for acquiring multiple brain signals of multiple brain signal measuring objects using an optical fiber with a light source classification function in the absence of a dichroic filter, an excitation filter, and an emission filter according to one embodiment of the present invention.

[0138] Reference Figure 8 According to one embodiment of the present invention, the optical brain signal measuring device 800 can be composed of a first light source 810, a second light source 811, a first splitting and splicing part 830, a second splitting and splicing part 840 and a second splitting and splicing part 841 and a measuring part 870 and a measuring part 871.

[0139] The optical signal 820 transmitted by the first light source 810 in a wavelength range after passing through the first optical fiber and the optical signal 821 transmitted by the second light source 811 in a wavelength range after passing through the first optical fiber are transmitted to the first splitting and splicing part 830, and the optical signal 820 and the optical signal 821 split in the first splitting and splicing part 830 are transmitted to the second splitting and splicing part 840 and the second splitting and splicing part 841.

[0140] The second splitting and splicing unit 840 transmits the optical signals 820 and 821 to the brain signal measurement objects 850 and 851, and transmits the optical signals 860 and 861 that pass through the second optical fiber in a wavelength range to the measurement units 870 and 871.

[0141] According to one embodiment of the present invention, the brain signal measuring device can not only utilize the optical fiber with light source classification function, but also measure the optical fiber luminosity of multiple brain signal recordings in the absence of a dichroic filter, an excitation filter, and an emission filter, thereby measuring brain signals.

[0142] Therefore, the present invention can provide an optical brain signal measurement device and method with a light source that does not require various filter configurations, is intuitive and simple, and can simultaneously record multiple brain signals.

[0143] Figure 9 and Figure 10 A diagram illustrating an optical brain signal measurement method according to an embodiment of the present invention.

[0144] Figure 9 An optical brain signal measurement method for acquiring multiple brain signal (multiple light source) signals using the light source directionality of an optical fiber and a spectrometer without a dichroic filter according to one embodiment of the present invention is illustrated.

[0145] Reference Figure 9 In step 901, according to one embodiment of the present invention, the optical brain signal measurement method inputs an optical signal.

[0146] That is, according to one embodiment of the present invention, the optical brain signal measurement method can input an optical signal of a first wavelength and an optical signal of a second wavelength.

[0147] In step 902, according to one embodiment of the present invention, an optical brain signal measurement method is performed with a specific wavelength range.

[0148] That is, according to one embodiment of the present invention, the optical brain signal measuring method is capable of transmitting an optical signal of a first wavelength in a first wavelength range, and transmitting an optical signal of a second wavelength in a second wavelength range.

[0149] In step 903 , according to one embodiment of the present invention, the optical brain signal measurement method outputs a spliced ​​signal or a segmented signal.

[0150] That is, according to one embodiment of the present invention, the optical brain signal measurement method can receive optical signals transmitted in a first wavelength range and optical signals transmitted in a second wavelength range based on the first directivity of the optical fiber, and output a spliced ​​signal that splices the received optical signals or a split signal that splits the spliced ​​signal.

[0151] In step 904 , according to one embodiment of the present invention, the optical brain signal measurement method receives and transmits measurement signals from a brain signal measurement subject.

[0152] That is, according to one embodiment of the present invention, the optical brain signal measurement method can transmit any one of the spliced ​​signal and the split signal to at least one brain signal measurement object based on the first directionality of the optical fiber, and transmit the measurement signal returned from at least one brain signal measurement object based on the second directionality of the optical fiber.

[0153] In step 905, according to one embodiment of the present invention, an optical brain signal measurement method is performed with a specific wavelength range.

[0154] That is, according to one embodiment of the present invention, the optical brain signal measuring method can allow the transmitted measurement signal to pass through at least one wavelength range of the third wavelength range and the fourth wavelength range.

[0155] In step 906 , according to one embodiment of the present invention, an optical brain signal measurement method measures brain signals.

[0156] That is, according to one embodiment of the present invention, the optical brain signal measurement method can measure at least one brain signal of at least one brain signal measurement subject based on a measurement signal transmitted in at least one wavelength range.

[0157] Figure 10 An optical brain signal measurement method for acquiring multiple brain signals using an optical fiber with a light source classification function without a dichroic filter, an excitation filter, and an emission filter according to an embodiment of the present invention is illustrated.

[0158] Reference Figure 10 In step 1001, according to one embodiment of the present invention, the optical brain signal measurement method inputs an optical signal.

[0159] That is, according to one embodiment of the present invention, the optical brain signal measuring method can transmit an optical signal of a first wavelength and an optical signal of a second wavelength through a first optical fiber that transmits an optical signal with a first directionality, allowing the optical signal of the first wavelength to pass through in a first wavelength range and allowing the optical signal of the second wavelength to pass through in a second wavelength range.

[0160] In step 1002 , according to one embodiment of the present invention, the optical brain signal measurement method outputs a spliced ​​signal or a segmented signal.

[0161] That is, according to one embodiment of the present invention, the optical brain signal measurement method can output a spliced ​​signal obtained by splicing an optical signal transmitted in a first wavelength range and an optical signal transmitted in a second wavelength range through a first optical fiber, or a split signal obtained by splitting the spliced ​​signal.

[0162] In step 1003 , according to one embodiment of the present invention, the optical brain signal measurement method receives and transmits a measurement signal from a brain signal measurement subject.

[0163] That is, according to one embodiment of the present invention, the optical brain signal measurement method can transmit the spliced ​​signal and any one of the split signals to at least one brain signal measurement object through a first optical fiber, and transmit the measurement signal returned from the at least one brain signal measurement object through a second optical fiber that allows the measurement signal to pass through at least one wavelength range of a third wavelength range and a fourth wavelength range and is transmitted in a second directionality.

[0164] In step 1004 , according to one embodiment of the present invention, an optical brain signal measurement method measures brain signals.

[0165] That is, according to one embodiment of the present invention, the optical brain signal measurement method can measure at least one brain signal of at least one brain signal measurement subject based on a measurement signal transmitted in at least one wavelength range.

[0166] Therefore, the present invention can provide an optical brain signal measuring device and a light source that does not require various filter configurations, is intuitive and simple, and can simultaneously record multiple brain signals.

[0167] The devices described above can be implemented using hardware structural elements, software structural elements, and / or a combination of hardware structural elements and software structural elements. For example, the devices and structural elements described in the embodiments can be implemented using one or more general-purpose computers or special-purpose computers, such as processors, controllers, arithmetic logic units (ALUs), digital signal processors (DSPs), microcomputers, field programmable arrays (FPAs), programmable logic units (PLUs), microprocessors, or any other device capable of executing and responding to instructions. The processing device can execute an operating system (OS) and one or more software applications executed on the operating system. Furthermore, the processing device can also access, store, manipulate, process, and generate data in response to the execution of the software. For ease of understanding, although the processing device is sometimes described as using a single processing device, those skilled in the art will appreciate that the processing device can include multiple processing elements and / or multiple types of processing elements. For example, the processing device can include multiple processors or a processor and a controller. In addition, other processing configurations can also be used, such as parallel processors.

[0168] The method according to the embodiment can be implemented in the form of program instructions executed by various computer means and recorded on a computer-readable medium. The computer-readable medium can contain program instructions, data files, data structures, etc., alone or in combination. The program instructions recorded on the medium can be specially designed and configured for the embodiment, or can be known and usable by those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and tapes, optical recording media such as CD-ROMs and DVDs, magneto-optical media such as optical floppy disks, and specially configured hardware devices such as ROMs, RAMs, and flash memories for storing and executing program instructions. Examples of program instructions include machine language codes generated by a compiler, and high-level language codes that can be executed by a computer using an interpreter, etc. The hardware device can be configured to run as one or more software modules provided for executing the operation of the embodiment, and vice versa.

[0169] Software may include a computer program, code, instructions, or a combination of one or more of these, and may configure a processing device to run on demand, or to instruct a processing device individually or collectively. Software and / or data may be embodied permanently or temporarily in some type of machine, component, physical device, virtual device, computer storage medium or device, or transmitted signal wave so that instructions or data are interpreted by or provided to a processing device. Software may be distributed on networked computer systems for storage or execution in a decentralized manner. Software and data may be stored on one or more computer-readable recording media.

[0170] Although the embodiments are described above with limited figures, those skilled in the art may make various modifications and variations from the description. For example, even if the described techniques are performed in a different order than the described method, and / or the structural elements of the described systems, structures, devices, circuits, etc. are combined or combined in a different manner than the described method, or are replaced or substituted with other structural elements or equivalents, appropriate results can still be achieved.

[0171] Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

[0172] Industrial Applicability

[0173] The present invention relates to an optical brain signal measurement device and method, and more specifically, to a fiber optic photometry technology that utilizes the light source directionality and light source classification function of an optical fiber and a spectrometer to obtain multiple brain signals without a dichroic filter.

Claims

1. An optical brain signal measuring device, characterized in that: include: a light source portion for inputting an optical signal of a first wavelength and an optical signal of a second wavelength; an excitation filter portion that transmits light signals of the first wavelength in a first wavelength range and transmits light signals of the second wavelength in a second wavelength range; a first splitting and splicing section that receives an optical signal transmitted in the first wavelength range and an optical signal transmitted in the second wavelength range based on a first directivity of the optical fiber, and outputs a spliced ​​signal obtained by splicing the received optical signals or a split signal obtained by splitting the spliced ​​signal; a second splitting and splicing unit that transmits either the spliced ​​signal or the split signal to at least one brain signal measurement subject based on the first directivity of the optical fiber, and transmits a measurement signal returned from the at least one brain signal measurement subject based on the second directivity of the optical fiber; an emission filter portion that transmits the transmitted measurement signal in at least one of a third wavelength range and a fourth wavelength range; as well as The measurement unit measures at least one brain signal of the at least one brain signal measurement subject based on the measurement signal transmitted in the at least one wavelength range.

2. The optical brain signal measuring device according to claim 1, characterized in that The first directivity of the optical fiber indicates a directionality for transmitting the optical signal from the light source section to the excitation filter section, from the excitation filter section to the first splitting and splicing section, from the first splitting and splicing section to the second splitting and splicing section, and from the second splitting and splicing section to the at least one brain signal measurement subject. The second directivity of the optical fiber indicates a directivity of transmitting the optical signal returned from the at least one brain signal measurement object to the second splitting and splicing section, from the second splitting and splicing section to the emission filter section, and from the emission filter section to the measurement section.

3. The optical brain signal measuring device according to claim 1, wherein: When the at least one brain signal measurement subject is a plurality of brain signal measurement subjects, the second dividing and splicing unit, the emission filter unit, and the measurement unit are additionally configured according to the number of the plurality of brain signal measurement subjects.

4. The optical brain signal measuring device according to claim 1, wherein: When the at least one brain signal measurement object is a single brain signal measurement object, the first segmentation and splicing unit outputs a spliced ​​signal for splicing the received optical signals; and when the at least one brain signal measurement object is a plurality of brain signal measurement objects, the first segmentation and splicing unit outputs a segmentation signal for segmenting the spliced ​​signal.

5. The optical brain signal measuring device according to claim 4, characterized in that: The first segmentation and splicing unit adjusts the segmentation ratio of the segmented signal to any one of 1:10 to 10:

1.

6. The optical brain signal measuring device according to claim 1, wherein: When the measurement signal transmitted in the at least one wavelength range exists in a plurality of wavelength ranges, the measurement unit is a spectrometer, and when the measurement signal transmitted in the at least one wavelength range exists in one wavelength range, the measurement unit is a photodetector.

7. An optical brain signal measuring device, characterized in that: include: a light source unit that transmits the optical signal of the first wavelength and the optical signal of the second wavelength through a first optical fiber that transmits an optical signal with a first directivity, the optical signal transmitting the first wavelength in a first wavelength range and transmitting the second wavelength in a second wavelength range; a first splitting and splicing unit configured to output, through the first optical fiber, a spliced ​​signal obtained by splicing the optical signal transmitted in the first wavelength range and the optical signal transmitted in the second wavelength range, or a split signal obtained by splitting the spliced ​​signal; a second splitting and splicing unit, configured to transmit either the spliced ​​signal or the split signal to at least one subject for brain signal measurement via the first optical fiber, and to transmit a return measurement signal from the at least one subject for brain signal measurement via the second optical fiber that transmits the measurement signal in at least one of a third wavelength range and a fourth wavelength range and transmits the measurement signal in a second directionality; as well as The measurement unit measures at least one brain signal of the at least one brain signal measurement subject based on the transmitted measurement signal.

8. The optical brain signal measuring device according to claim 7, characterized in that: The first directionality indicates a directionality of transmitting the light signal from the light source unit to the first segmentation and splicing unit, from the first segmentation and splicing unit to the second segmentation and splicing unit, and from the second segmentation and splicing unit to the at least one brain signal measurement subject. The second directionality indicates a directionality in which an optical signal returned from the at least one brain signal measurement subject is transmitted to the second dividing and splicing section and then transmitted from the second dividing and splicing section to the measurement section.

9. The optical brain signal measuring device according to claim 7, characterized in that: When the at least one brain signal measurement subject is a plurality of brain signal measurement subjects, the second dividing and splicing unit and the measurement unit are additionally configured according to the number of the plurality of brain signal measurement subjects.

10. The optical brain signal measuring device according to claim 7, characterized in that: When the at least one brain signal measurement object is a single brain signal measurement object, the first segmentation and splicing unit outputs a spliced ​​signal for splicing the received optical signals; and when the at least one brain signal measurement object is a plurality of brain signal measurement objects, the first segmentation and splicing unit outputs a segmentation signal for segmenting the spliced ​​signal.

11. The optical brain signal measuring device according to claim 10, characterized in that: The first segmentation and splicing unit adjusts the segmentation ratio of the segmented signal to any one of 1:10 to 10:

1.

12. The optical brain signal measuring device according to claim 7, wherein: The measuring unit is at least one of a spectrometer and a photodetector.

13. A method for measuring optical brain signals, characterized in that: include: a step of inputting an optical signal of a first wavelength and an optical signal of a second wavelength into the light source unit; a step of transmitting, in the excitation filter unit, an optical signal of the first wavelength in a first wavelength range and an optical signal of the second wavelength in a second wavelength range; a step of receiving, in a first splitting and splicing section, an optical signal transmitted in the first wavelength range and an optical signal transmitted in the second wavelength range based on a first directivity of the optical fiber, and outputting a spliced ​​signal obtained by splicing the received optical signals or a split signal obtained by splitting the spliced ​​signal; a step of transmitting, in a second splitting and splicing unit, either the spliced ​​signal or the split signal to at least one brain signal measurement subject based on a first directionality of the optical fiber, and transmitting a measurement signal returned from the at least one brain signal measurement subject based on a second directionality of the optical fiber; a step of transmitting the transmitted measurement signal in at least one of a third wavelength range and a fourth wavelength range in the emission filter section; as well as The step of measuring, in the measurement unit, at least one brain signal of the at least one brain signal measurement subject based on the measurement signal transmitted in the at least one wavelength range.

14. The optical brain signal measurement method according to claim 12, characterized in that: The first directivity of the optical fiber indicates a directionality for transmitting the optical signal from the light source section to the excitation filter section, from the excitation filter section to the first splitting and splicing section, from the first splitting and splicing section to the second splitting and splicing section, and from the second splitting and splicing section to the at least one brain signal measurement subject. The second directivity of the optical fiber indicates a directivity of transmitting the optical signal returned from the at least one brain signal measurement object to the second splitting and splicing section, from the second splitting and splicing section to the emission filter section, and from the emission filter section to the measurement section.

15. A method for measuring optical brain signals, characterized in that: include: a step of transmitting, in a light source unit, the optical signal of the first wavelength and the optical signal of the second wavelength through a first optical fiber that transmits an optical signal with a first directivity and transmits an optical signal of a first wavelength in a first wavelength range and transmits an optical signal of a second wavelength in a second wavelength range; In the first splitting and splicing section, a step of outputting a spliced ​​signal obtained by splicing an optical signal transmitted in the first wavelength range and an optical signal transmitted in the second wavelength range, or a split signal obtained by splitting the spliced ​​signal, through the first optical fiber; a step of transmitting, in the second splitting and splicing section, either the spliced ​​signal or the split signal to at least one brain signal measurement subject via the first optical fiber, and transmitting, from the at least one brain signal measurement subject, a measurement signal returned via a second optical fiber that transmits the measurement signal in at least one of a third wavelength range and a fourth wavelength range and transmits the measurement signal in a second directionality; as well as The step of measuring, in a measuring unit, measuring at least one brain signal of the at least one brain signal measurement subject based on the transmitted measurement signal.

16. The optical brain signal measurement method according to claim 15, characterized in that: The first directionality indicates a directionality of transmitting the light signal from the light source unit to the first segmentation and splicing unit, from the first segmentation and splicing unit to the second segmentation and splicing unit, and from the second segmentation and splicing unit to the at least one brain signal measurement subject. The second directionality indicates a directionality in which an optical signal returned from the at least one brain signal measurement subject is transmitted to the second dividing and splicing section and then transmitted from the second dividing and splicing section to the measurement section.

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