JP2007195816A - Throwaway photodetector and noninvasive optical biosensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To take out a light-emitting element or a light-receiving element including a harmful substance from a detector body for segregated disposal or reuse of the element. <P>SOLUTION: The photodetector is structured so as to remove a light-emitting section and a light-receiving section only from a detector body 21a. Consequently, by using a vantage material or a plastic material for a cutting portion where the light receiving/emitting element 1 and the detector body are cut away, and cuts and holes are provided in the cutting portion 2a. By folding or tearing the cutting line along the cuts or the holes, the light-emitting section or the light-receiving section and the detector body 21a on the periphery can be easily cut away. Furthermore, the provision of cuts or holes in a flexible substrate 2 or a printed board 12 and tearing or folding along the cuts or the holes facilitates cutting of the connection between the light-receiving section, and the light-emitting section and wiring. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a disposable photodetector used by being attached to a body (living body), and a non-invasive optical biosensor that performs pulse measurement, blood oxygen saturation measurement, and the like using the photodetector.

  This type of conventional non-invasive optical biosensor as a light detector irradiates a living body with light emitted from a light emitting unit, detects light transmitted or reflected in the living body with a light receiving unit, and converts it into an electrical signal. It has a structure to do.

  Examples of applications of this non-invasive optical biosensor include a pulse measuring device and an oxygen saturation measuring device.

  Among hemoglobins in blood, oxyhemoglobin and reduced hemoglobin are known to have different light absorption and transmission characteristics depending on the wavelength of light. Oxyhemoglobin decreases red light absorption and increases infrared light absorption. On the other hand, reduced hemoglobin has an optical property that the absorption of red light increases and the absorption of infrared light decreases.

  The above-mentioned pulse measuring device measures the pulse by detecting the increase / decrease amount of hemoglobin contained in the blood in the blood vessel from the change in the light absorption characteristics of the irradiated light. The oxygen saturation measuring instrument utilizes the difference in light absorption characteristics between oxyhemoglobin and reduced hemoglobin. In this oxygen saturation measuring device, the body is irradiated with light of two different wavelengths, and light transmitted or reflected by blood vessels inside the body is detected by the light receiving unit. In this light-receiving unit, the amount of light having two different wavelengths transmitted or reflected is measured, and the ratio of oxyhemoglobin and deoxyhemoglobin is obtained.

  In many of the pulse measuring devices and oxygen saturation measuring devices, a light emitting diode is used for a light emitting portion and a photodiode is used for a light receiving portion.

  Conventional photodetectors such as a pulse measuring instrument and an oxygen saturation measuring instrument that are widely used include a clip-type detector disclosed in Patent Document 1 and that disclosed in Patent Document 2, for example. There is a disposable type that can be attached to a living body.

  The clip-type photodetector has a light-emitting element and a light-receiving element for detection mounted on a clamping member, and performs detection by sandwiching a living body detection part such as a fingertip with a probe. Since this clip-type photodetector simply sandwiches the fingertip, it can be easily measured, but it is difficult to always wear it on the body and is used for temporary measurement.

On the other hand, disposable photodetectors that are attached to living bodies use adhesive parts, and put the light emitting and receiving parts of the photodetectors along with fingers, feet, and other body (living body) measurement sites to fix the foreskin Let By fixing the foreskin to the living body, it can be worn for a long time without shifting even if there is some movement of the body.
JP-A-8-103435 JP 2005-110816 A

  However, the conventional disposable photodetector has the following problems.

  That is, since the adhesive part is directly attached on the body (living body), the disposable photodetector is greatly reduced in tackiness and cannot be used again. In addition, various components such as a light emitting element and a light receiving element are included in the photodetector and cannot be easily removed. Therefore, since all these members are discarded in one use, the cost is high, and it is also necessary to discard light emitting elements and light receiving elements containing arsenic and other harmful substances together with other members. It is not very favorable from the environmental aspect.

  The present invention solves the above-mentioned conventional problems, it is possible to easily separate the light-emitting element and the light-receiving element from the detector body, remove the light-emitting element and the light-receiving element containing harmful substances when discarded, It is an object of the present invention to provide a disposable photodetector that can be disposed of and reused light emitting elements and light receiving elements and is environmentally friendly, and a noninvasive optical biosensor using the same.

  The disposable photodetector of the present invention detects a light emitting unit that emits light to a living body, a light receiving unit that converts light transmitted or reflected in the living body into an electrical signal, and a signal from the light receiving unit. In a disposable photodetector having a signal detection unit and used by being attached to the living body, the light emitting unit and the light receiving unit can be detached from the detector main body provided with the signal detection unit It has a detaching structure, and thereby the above object is achieved.

  Preferably, as a detachable structure in the disposable photodetector of the present invention, a peripheral member that houses the light emitting unit and the light receiving unit should separate the light emitting unit, the light receiving unit, and the detector main body unit. It is made of a material that is easier to cut than a metal material.

  Further preferably, the peripheral member in the disposable photodetector of the present invention is made of a vantage material or a plastic material.

  Further preferably, as a detachable structure in the disposable photodetector of the present invention, a peripheral member that houses the light emitting part and the light receiving part is cut between the light emitting part and the light receiving part and the detector main body part. At least one of the cutting part for cutting and the hole for cutting is provided.

  Further preferably, in the disposable photodetector according to the present invention, a space between the light emitting portion and the light receiving portion and the detector main body portion is a portion including the light emitting portion and the light receiving portion removed from the detector main body. Compared to a narrower configuration.

  Further preferably, in the disposable photodetector of the present invention, a wiring for supplying a light emission current to the light emitting unit and a wiring for transmitting a signal from the light receiving unit to the signal detection unit are formed on a flexible substrate or a printed circuit board. Has been.

  Further preferably, in the disposable photodetector according to the present invention, the light emitting unit, the light receiving unit, and the flexible substrate or the printed circuit board include an adhesive layer and an external layer that can be attached to a living body. It is included.

  Further preferably, when the light emitting unit and the light receiving unit are separated from the detector main body in the outer layer of the disposable photodetector according to the present invention, a knob for protruding the outer layer is provided to protrude. It has been.

  Further preferably, in the disposable photodetector of the present invention, in the portion where the light emitting unit and the light receiving unit are detached from the detector main body, the adhesive layer is formed of the light emitting unit, the light receiving unit, and the flexible substrate. Or it is not bonded to the printed circuit board.

  Further, preferably, in the disposable photodetector of the present invention, the electrodes of the light emitting unit and the light receiving unit and the wiring are connected via a connecting unit.

  Furthermore, preferably, the connection part in the disposable photodetector of the present invention is provided on the light emitting part and the light receiving part side removed from the detector main body.

  Further, preferably, as a removal structure in the disposable photodetector of the present invention, the flexible substrate or the printed circuit board is provided with at least one of a cutting notch and a cutting hole.

  Further preferably, in the disposable photodetector of the present invention, the light emitting section and the light receiving section are configured by a photo interrupter.

  The noninvasive optical biosensor of the present invention performs at least one of pulse measurement and blood oxygen saturation measurement using the disposable photodetector of the present invention. Achieved.

  The operation of the present invention will be described below with the above configuration.

  In the present invention, in the disposable photodetector, a detaching structure is provided so that only the tip portion including the light emitting portion and the light receiving portion can be detached from the detector main body side.

  In order to separate the light-emitting unit including the light-emitting element and the light-receiving unit including the light-receiving element from the other detector main body, the light-emitting unit, the light-receiving unit, and the outer portion of the photodetector (the periphery of the light-emitting unit and the light-receiving unit) ) And the connection between the light receiving part or the light emitting part and the wiring.

  For this reason, it is preferable to use a material that can be easily cut, such as a vantage material or a plastic material, at a cutting portion that separates the light emitting portion, the light receiving portion, and the detector main body from the periphery of the light emitting portion and the light receiving portion.

  Further, by providing a cut portion or hole for cutting in the cut portion, and breaking or tearing the cut portion (cut line) along the cut portion or hole, the light emitting portion, the light receiving portion and the peripheral portion thereof Can be easily separated.

  Further, the wiring for supplying the light emission current to the light emitting section and the wiring for transmitting the signal obtained by the light receiving section to the signal detecting section need to be firmly connected to the light emitting section and the light receiving section. Therefore, for example, if the structure of the light emitting unit or the light receiving unit is easily broken so that the light emitting unit or the light receiving unit is easily separated from the detector main body, a problem arises in reliability.

  Therefore, it is preferable to cut the wiring portion of the flexible board or the printed board connected to the electrodes of the light emitting part and the light receiving part.

  As a result, when the light emitting unit and the light receiving unit are separated from the detector main body unit, the connection between the light receiving unit and the light emitting unit and the signal line can be easily cut by tearing or folding along the notch or the hole. Is possible.

  Furthermore, when these wirings are formed on a flexible substrate or a printed circuit board, a cut portion or a hole for cutting is provided in the flexible substrate or the printed circuit board, and the substrate is torn or folded along the cut portion or the hole. By doing so, it becomes possible to easily disconnect the light receiving unit and the light emitting unit from the signal line.

  As described above, according to the present invention, the light-emitting unit including the light-emitting element and the light-receiving unit including the light-receiving element are removed from the other detector main body units and separated and discarded after the use of the disposable photodetector, or the light emission The element and the light receiving element can be reused.

  In the present invention, “reuse of a photodetector” refers to reuse by a supplier. In addition, “separated disposal” means that the hospital can be disposed of at a hospital or a business. In the current disposable photodetector, the light emitting / receiving element is in close contact with the main body, and even when the contractor collects it, the separation work is very difficult. If this sorting operation can be performed efficiently, sorting and disposal can be performed efficiently. Furthermore, in the case of current disposable photodetectors, the usage period is about one week at the longest, which is a very short period with respect to the lifetime of the light emitting element and the light receiving element. If it can be realized, it becomes easy to reuse the light emitting element and the light receiving element.

Embodiments 1 and 2 of the disposable photodetector according to the present invention will be described below in detail with reference to the drawings.
(Embodiment 1)
1 is a perspective view showing a tip portion of a disposable photodetector according to Embodiment 1 of the present invention, and FIG. 2 is a longitudinal sectional view of a tip portion of the photodetector in FIG.

  In FIG. 1 and FIG. 2, the disposable photodetector 21 of the first embodiment has a light emitting / receiving element 1 and a flexible substrate 2, which are vertically moved by an adhesive layer 3 and an outer layer 4. It is sandwiched and included. The disposable photodetector 21 includes a signal detection unit (not shown) that processes and detects a signal from the light emitting / receiving element 1 and a power source unit (not shown) for supplying a light emission current to the light receiving / emitting element 1. 11 side.

  The light emitting / receiving element 1 includes a light emitting unit (not shown) that irradiates a living body with light, and a light receiving unit (not shown) that converts light transmitted or reflected on the living body into an electric signal. The light emitting / receiving element 1 is provided with an electrode terminal 5 connected to the wiring from the flexible substrate 2 and connected by a connecting portion 5a.

  The connection portion 5a is connected to the wiring from the flexible substrate 2 by solder connection or crimp connection.

  The flexible substrate 2 is formed with wiring for supplying a light emission current to the light emitting section and wiring for transmitting a signal from the light receiving section to the detection section.

  The pressure-sensitive adhesive layer 3 is covered with a pressure-sensitive adhesive tape so as to be attached in contact with the body. The adhesive layer 3 transmits light to a predetermined front surface of the light emitting / receiving element 1 in order to transmit light irradiated to the living body from the light emitting unit and light transmitting or reflecting in the living body to convey information on the living body. A portion 3a is provided. Further, the light receiving / emitting element 1 and the flexible substrate 2 are covered and accommodated by the adhesive layer 3 and the outer layer 4.

  In the first embodiment, the following removal structure is used to remove (remove) the light emitting / receiving element 1 from the detector main body 21a provided with the signal detection unit and the power supply unit.

  The adhesive layer 3 and the outer layer 4 are made of a material that is easy to cut, such as a plastic material such as a vantage material or vinyl (polyvinyl chloride), instead of a metal. Thereby, the line-shaped cutting part which separates the light emitting / receiving element 1 and the detector main body 21a can be easily cut.

  In addition, the light receiving and emitting element 1, the flexible substrate 2, the adhesive layer 3 and the outer layer 4 have different bonding methods depending on each part. On the side of the separation part 6 removed from the detector main body 21a, the outer layer 4, the light emitting / receiving element 1, the electrode terminal 5 of the light emitting / receiving element 1 and the flexible substrate 2 are bonded. It is not glued. In the portions other than the above, the flexible substrate 2, the outer layer 4, and the adhesive layer 3 are all bonded to each other. Thereby, the light emitting / receiving element 1 is sandwiched between the outer layer 4 and the adhesive layer 3 and can be held inside the photodetector 21 without being displaced. Yes.

  Further, in the outer layer 4, as shown by a dotted line in FIGS. 1 and 2, the outer layer 4 made of a perforation is formed as a cutting notch at the line boundary between the detector main body 21 a and the separating portion 6. A cutting portion 4a is provided, and the light emitting / receiving element 1 and the detector main body 21a in the periphery thereof are easily separated by folding and tearing the outer layer 4 along the line-shaped cutting portion (broken line portion). It becomes possible. Instead of such a notch, the outer layer 4 can be easily cut into a line by providing a notch or a hole.

  Furthermore, a knob portion 7 that partially protrudes is provided at the distal end portion of the photodetector 21 (here, the outer layer 4), so that the separation portion 6 can be easily detached from the detector main body 21a.

  Furthermore, the flexible substrate 2 is provided with a cutting notch (notch) or one or more holes in a line shape, and is bent or torn along the notch or the one or more holes. The connection between the light receiving unit and the light emitting unit and the signal line can also be easily disconnected.

  FIG. 3 is a plan view showing a connection portion between the flexible substrate 2 of FIG. 2 and the electrode terminal 5 of the light emitting / receiving element 1.

  In FIG. 3, the flexible substrate 2 has a metal portion 8a (adhesive portion between the element electrode terminal and the flexible substrate in FIG. 2) of the plurality of wirings 8 provided on the flexible substrate 2 exposed on the surface. These wiring portions are accommodated and arranged in the flexible substrate 2 by the cover layer 9. The electrode terminal 5 of the light emitting / receiving element 1 is connected to each wiring 8 on the flexible substrate 2 side in the metal portion 8a.

  The flexible substrate 2 is divided into a separation portion A of the flexible substrate 2 that is separated from the detector body 21a and a body portion B of the flexible substrate 2 that is not separated from the detector body 21a. Corresponds to a part (substrate part) of the separation part 6 shown in FIG. 1, and the main body part B of the flexible substrate 2 corresponds to a part (substrate part) of the detector main body 21 a other than the separation part 6. In the flexible substrate 2, a cut portion (notch portion) 10 a for cutting and a plurality of holes 10 b arranged in a line are formed at positions corresponding to the cut portions 2 a of the flexible substrate 2.

  When the detector main body 21a and the separating part 6 including the light emitting / receiving element 1 are separated by the above configuration, the outer layer cutting part 4a of the outer layer 4 and the cutting part of the flexible substrate 2 are pulled up by lifting the knob 7. 2a is cut. As a result, as shown in FIG. 4, it is possible to separate the separation portion 6 that is a portion including the light emitting / receiving element 1 from the detector main body 21a. In this way, the detector main body 21a is formed in a ring shape so as to surround the periphery of the light emitting / receiving element 1 along the outer layer cutting portion 4a of the outer layer 4 instead of separating them by separating them at the constricted portion. Alternatively, the separation part 6 may be separated and separated.

  As described above, in the disposable photodetector 21 according to the first embodiment, the separation portion A of the flexible substrate 2 is bonded to the outer layer 4 when the separation portion 6 is separated from the detector main body 21a. When the outer layer 4 is cut from the detector body 21a, the cut-off portion A of the flexible substrate 2 is simultaneously cut along the line shape to the cut portion 2a of the flexible substrate 2 shown by a double line in FIG. Thereby, the detector main body 21a and the separation part 6 are separated.

Furthermore, in the separation part 6, since the light receiving / emitting element 1, the electrode terminal 5 of the light receiving / emitting element 1 and the flexible substrate 2 and the adhesive layer 3 are not bonded, the adhesive layer 3 includes the light receiving / emitting element 1 and the light receiving / emitting element 1. The electrode terminal 5 and the flexible substrate 2 can be easily removed.
(Embodiment 2)
FIG. 5 is a longitudinal cross-sectional view showing a tip portion of a disposable photodetector according to Embodiment 2 of the present invention. The basic configuration of the disposable photodetector of the second embodiment is the same as that of the disposable photodetector 21 of the first embodiment described above. Hereinafter, as a schematic diagram in which the light receiving and emitting element portion is separated from the detector main body, the same FIG. 1 and FIG. 4 as those in the first embodiment will be used, and differences will be mainly described in order to avoid duplication of explanation.

  In FIG. 5, the difference between the disposable photodetector 22 of the second embodiment and the disposable photodetector 21 of the first embodiment is that the light emitting unit and the light receiving unit of the first embodiment are separately received. That is, instead of the light emitting element 1, a photo interrupter 11 constituted by a light emitting diode and a photodiode is used, and a printed circuit board 12 is used instead of the flexible substrate 2.

  FIG. 6 is a plan view showing a connection portion between the electrode terminal 15 of the photointerrupter 11 of FIG. 5 and the printed circuit board 12.

  In FIG. 6, a plurality of wirings 18 provided on the printed circuit board 12 have electrode terminal connection holes 12 a corresponding to the respective wirings 18 exposed on the surface, and other parts are wired to the printed circuit board 12. Each electrode terminal 15 of the photo interrupter 11 is electrically connected to the printed circuit board 12 side in each electrode terminal connection hole 12 a of the printed circuit board 12.

  The printed circuit board 12 is divided into a separation part C of the printed circuit board 12 that is separated from the detector body 22a and a body part D of the printed circuit board 12 that is not separated from the detector body 22a. The separation part C of the printed circuit board 12 is 3 corresponds to the separation part A shown in FIG. 3, and the main body part D of the printed circuit board 12 corresponds to the main body part B shown in FIG. In this printed circuit board 12, a cutting portion 12a of the printed circuit board 12 is provided with a cutting notch (notch) 10c and one or a plurality of holes 10d on the cutting line along the cutting line.

  In the disposable photodetector 22 according to the second embodiment, the printed circuit board 12 is separated from the separated section 6 of the outer layer 4 and the photo printed circuit board 12 in the same manner as the flexible substrate 2 of the first embodiment. It adheres to the interrupter 11. Therefore, when the separation part 6 is separated from the detector main body 22a by pulling up the knob 7 of the outer layer 4, the separation part C of the printed circuit board 12 is replaced with the cutting part of the flexible substrate 12 shown by a double line in FIG. Cut along 12a. As a result, as shown in FIG. 4, it is possible to separate the separation portion 6 including the photo interrupter 11 from the detector main body 22a.

  As described above, according to the first and second embodiments, only the light emitting unit and the light receiving unit can be detached from the detector main body 21a or 22a. For this reason, a material that can be easily cut, such as a vantage material or a plastic material, is used as a cutting part 2a or 12a on the cutting line, or one or a plurality of cutting parts are separated from the light emitting / receiving unit element 1 and the detector main body. A hole is provided. The light emitting part, the light receiving part, and the peripheral part thereof can be easily separated from the detector main body 21a or 22a by folding or tearing the cut line or the cutting line along the hole. Furthermore, the cut | disconnection and hole are provided in the flexible substrate 2 or the printed circuit board 12 as a cutting | disconnection part, and a connection with a light-receiving part and a light emission part, and wiring is easily cut | disconnected by cut | disconnecting along a cut | notch or a hole. be able to. Thus, when the light-emitting element or the light-receiving element containing the harmful substance is discarded, it can be separated from the detector main body 21a or 22a to obtain the disposable light detector 21 or 22 that can be separated and reused. it can.

  Although not specifically described in the first and second embodiments, the disposable photodetector 21 or 22 of the first and second embodiments that can separate the light emitting unit and the light receiving unit from the detector main body 21a or 22a is used. Thus, a non-invasive optical biosensor that performs at least one of pulse measurement and blood oxygen saturation measurement can be configured. In this case, the pulse measuring device detects the increase or decrease of hemoglobin contained in the blood in the blood vessel from the change in the light absorption characteristics of the irradiated light, measures the pulse, and the oxygen saturation measuring device The body is irradiated with light of two different wavelengths, and the light amounts of two different wavelengths transmitted or reflected in the blood vessels inside the body are measured by the light receiving unit, and the ratio of oxyhemoglobin and reduced hemoglobin is determined.

  As mentioned above, although this invention was illustrated using preferable Embodiment 1, 2 of this invention, this invention should not be limited and limited to this Embodiment 1,2. It is understood that the scope of the present invention should be construed only by the claims. It is understood that those skilled in the art can implement an equivalent range based on the description of the present invention and the common general technical knowledge from the description of the specific preferred embodiments 1 and 2 of the present invention. Patents, patent applications, and documents cited herein should be incorporated by reference in their entirety, as if the contents themselves were specifically described herein. Understood.

  The present invention relates to a disposable photodetector that is used by being attached to a body (living body), and a non-invasive optical biosensor that performs at least one of pulse measurement and blood oxygen saturation measurement using the photodetector. In this field, the light-emitting unit including the light-emitting element and the light-receiving unit including the light-receiving element are removed from the other detector main body, and are disposed of after the use of the disposable photodetector, or the light-emitting element and the light-receiving element Can be reused.

It is a perspective view which shows the front-end | tip part of the disposable photodetector which concerns on Embodiment 1 of this invention. It is a longitudinal cross-sectional view which shows the front-end | tip part of the disposable photodetector of FIG. It is a top view which shows the connection part of the flexible substrate of FIG. 2, and the electrode terminal of a light emitting / receiving element. FIG. 2 is a perspective view of a light receiving / emitting element portion showing a state where the light receiving / emitting element portion is separated from the detector main body in the disposable photodetector of FIG. 1. It is a longitudinal cross-sectional view which shows the front-end | tip part of the disposable photodetector which concerns on Embodiment 2 of this invention. It is a top view which shows the connection part of the printed circuit board of FIG. 5, and the electrode terminal of a photo interrupter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light emitting / receiving element 2 Flexible substrate 2a Cutting part of flexible substrate 3 Adhesive layer 3a Light transmission layer 4 External layer 4a External layer cutting part 5 Element electrode terminal 5a Connection part of element electrode terminal and flexible substrate 6 Detaching part 7 Knob 8 Wiring of flexible substrate 8a Metal layer of flexible substrate 9 Cover layer 10a Cutting portion for cutting flexible substrate (notch)
10b Flexible board cutting hole 10c Printed board cutting notch (notch)
10d Hole for cutting a printed circuit board 11 Photo interrupter 12 Printed circuit board 12a Printed circuit board cutting section 12b Electrode terminal connection hole 15 Photo interrupter electrode terminal 21a, 22a Detector main body A Flexible substrate cutting section B Flexible board main body section C Printed circuit board separation part D Printed circuit board body

Claims (14)

A light emitting unit that emits light to the living body, a light receiving unit that converts light transmitted or reflected in the living body into an electrical signal, and a signal detection unit that detects a signal from the light receiving unit; In a disposable photodetector used by being affixed,
A disposable photodetector having a detachable structure capable of detaching the light emitting unit and the light receiving unit from a detector main body provided with the signal detection unit.   As the detaching structure, a peripheral member that houses the light emitting unit and the light receiving unit is made of a material that is easier to cut than a metal material so as to separate the light emitting unit and the light receiving unit from the detector main body. The disposable photodetector according to claim 1.   The disposable photodetector according to claim 2, wherein the peripheral member is made of a vantage material or a plastic material.   As the removal structure, in a peripheral member that houses the light emitting unit and the light receiving unit, at least one of a cutting notch and a cutting hole is provided between the light emitting unit and the light receiving unit and the detector main body. The disposable photodetector according to claim 1 or 2.   The disposable structure according to claim 4, wherein the light emitting unit, the light receiving unit, and the detector main body are configured to be narrower than a portion including the light emitting unit and the light receiving unit that is removed from the detector main body. Type photodetector.   The disposable light detection according to claim 1 or 2, wherein a wiring for supplying a light emission current to the light emitting unit and a wiring for transmitting a signal from the light receiving unit to the signal detection unit are formed on a flexible substrate or a printed circuit board. vessel.   The disposable light detector according to claim 6, wherein the light emitting unit, the light receiving unit, and the flexible substrate or the printed circuit board are enclosed by an adhesive layer and an external layer that can be attached to a living body. .   The disposable light detection according to claim 7, wherein a knob portion for pulling up the outer layer protrudes from the outer layer when the light emitting portion and the light receiving portion are separated from the detector main body. vessel.   The disposable according to claim 7, wherein the adhesive layer is not bonded to the light emitting unit, the light receiving unit, and the flexible substrate or the printed circuit board in a portion where the light emitting unit and the light receiving unit are removed from the detector main body. Type photodetector.   The disposable photodetector according to claim 6, wherein each electrode of the light emitting unit and the light receiving unit and the wiring are connected via a connection unit.   The disposable light detector according to claim 10, wherein the connection part is provided on the light emitting part and the light receiving part side removed from the detector main body.   The disposable photodetector according to claim 6, wherein at least one of a cutting notch and a cutting hole is provided in the flexible substrate or the printed circuit board as the detachment structure.   The disposable light detector according to claim 1, wherein the light emitting unit and the light receiving unit are configured by a photo interrupter.   A non-invasive optical biosensor that performs at least one of pulse measurement and blood oxygen saturation measurement using the disposable photodetector according to claim 1.

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