Optical adjuvant therapy earphone assembly

Abstract

An optical adjuvant therapy earphone assembly comprises an earphone single body, an optical fiber and a light emitter. The earphone single body comprises a shell and a light-transmitting earplug. The front end and the rear end of the shell are provided with a shell front opening and a shell rear opening respectively, and a penetrating shell channel is formed between the shell front opening and the shell rear opening. The light-transmitting earplug is provided with an earplug opening and is sleeved at the front end of the shell. The optical fiber is provided with a first end and a second end, the second end extends into the illuminator, and the first end extends into the shell from the rear opening of the shell and is fixed in the shell channel. The light emitting device comprises an LED light emitting unit, a light guide unit, an LED driving unit and a direct current power unit, the direct current power unit supplies operation power to the LED light emitting unit and the LED driving unit, and the light guide unit is arranged between the LED light emitting unit and the second end of the optical fiber and guides light emitted by the LED light emitting unit into the optical fiber. The wavelength range of light emitted by the LED light-emitting unit is between 0.62 micrometers and 1000 micrometers.

Description

Technical Field

[0001] The utility model relates to the technical field of medical auxiliary equipment, in particular to an optical auxiliary treatment device for human ears. Background Art

[0002] Otolaryngologists point out that hearing generally begins to decline after the age of 40. As people age, their metabolism slows down, and the blood vessels in the inner ear become hardened or narrowed, which affects blood circulation, hinders the delivery of nutrients to the cells in the ear, and affects the microcirculation of the auditory nerve, which then leads to hearing aging, tinnitus, ossicular sclerosis, or high-frequency audio reception degradation. To delay hearing aging, promoting blood circulation in the ear helps metabolism and improves blood circulation, which has the effect of slowing down and improving hearing deterioration.

[0003] The wavelength of red light is 0.62 microns to 0.75 microns, and the wavelength of infrared light is 0.75 microns to 1000 microns. They have been widely used in medicine in rehabilitation treatment of tissue repair and promoting blood circulation. However, the existing technology for auxiliary treatment of sudden deafness, tinnitus and other hearing degeneration diseases is still in its infancy.

[0004] In the prior art, patent number CN201811082135.1 provides an earmuff with LED lights, including: an earmuff body, a power supply and a controller. The PCB board set in the middle layer of the earmuff body is fixedly installed with LED lights and a control chip; the control chip performs display control of the LED lights according to the received control instructions; the inner layer of the earmuff body is close to the ear; the PCB board is also fixedly provided with a power supply, which is used to power the control chip and the LED lights; the controller receives the LED light display control instructions issued by the user, and controls the control chip to perform corresponding control display operations according to the display control instructions. This patent sets LED lights on the earmuffs so that the ears can receive the irradiation of LED red light or LED blue light to stimulate the acupuncture points on the ears.

[0005] In the prior art, patent number CN201510991042.0 provides a health care and physiotherapy earmuff, including an earmuff body, a power cord and a power supply. The earmuff body is semi-enclosed and is composed of an outer layer, a middle layer and an inner layer. The inner layer is in contact with the human ear and is made of a light-transmitting material. The middle layer is a PCB board, and the outer layer is covered with an opaque textile material or plastic. A chip-type LED is fixed on the PCB board, and a power socket is provided at the bottom of the PCB board. The power socket is connected to the power supply through a power cord. Magnetic beads are provided in the earmuff body. When powered on, the chip-type LED emits red visible light, and the magnetic beads generate a magnetic field, thereby producing micro-stimulation on specific acupuncture points of the human ear.

[0006] In the prior art, Patent No. CN201810964151.7 proposes an ear, nose and throat red light therapy device, which uses a stainless steel sleeve to wrap the optical fiber and guide the red light emitted from the red light emission window of the red light therapy device into the ear, nose and throat cavity for targeted treatment of both ears and both nostrils.

[0007] In the prior art, patent number CN201921687202.2 discloses a far-infrared irradiation device for improving microcirculation in a small cavity of the middle inner ear, which is equipped with a concave spherical metal emission source, and the side of the emission source away from the bottom plate is coated with a high emissivity film, and the emission wavelength range of the far-infrared ray is between 8 and 12 μm. A hollow cavity is fixedly installed on the side of the installation box away from the bottom plate, a waveguide is fixedly installed on the side of the hollow cavity away from the installation box, a connecting wire is fixedly installed on one side of the installation box, and a connecting tube is fixedly installed on one side of the hollow cavity.

[0008] In the prior art, patent number CN202311417038.4 discloses a far-infrared irradiation device for the middle and inner ear, comprising a conical element, a heating component, and a waveguide; a large opening and a small opening are respectively provided at the axial ends of the conical element, a cone surface is formed between the large opening and the small opening, and the conical element is connected to the waveguide through the small opening. The far-infrared rays emitted by the first far-infrared emitter will diverge into the ear hole along the waveguide to promote resonance inside the ear hole and promote blood circulation in the ear hole; the far-infrared rays emitted by the second far-infrared emitter will resonate with the peripheral position of the ear hole and promote blood circulation near the ear; the far-infrared rays can cover the entire inside and outside of the ear. Utility Model Content

[0009] In order to solve the shortcomings of the existing technology, the purpose of the utility model is to provide an optically assisted therapeutic earphone assembly, which uses red light or infrared light to perform auxiliary irradiation treatment on the external ear and the middle ear. Compared with the existing technology, it is smaller in size and more comfortable to wear.

[0010] To achieve the above-mentioned purpose, the first preferred embodiment of the utility model proposes an optically assisted therapeutic earphone assembly for use in one ear, comprising an earphone unit, an optical fiber, and a light emitter. The earphone unit comprises a shell and a light-transmitting earplug for inserting into the outer ear of the human body.

[0011] The shell has a front opening and a rear opening at the front and rear ends respectively, and a through shell channel is formed between the front opening and the rear opening. The light-transmitting earplug has an earplug opening, which is sleeved on the front end of the shell. The optical fiber has a first end and a second end, the second end extends into the light emitter, and the first end extends into the shell from the rear opening of the shell and is fixed to the shell channel. The light emitter includes an LED light-emitting unit, a light guide unit, an LED driving unit, and a DC power unit. The DC power unit supplies operating power to the LED light-emitting unit and the LED driving unit. The light guide unit is arranged between the LED light-emitting unit and the second end of the optical fiber, and guides the light emitted by the LED light-emitting unit into the optical fiber. The light emitted by the LED light-emitting unit is red light or infrared light, and the wavelength range is between 0.6 microns and 1000 microns. The red light / infrared light is guided into the optical fiber through the light guide unit, and then transmitted to the earphone monomer. The red light / infrared light is emitted from the end of the optical fiber and irradiates the outer ear and middle ear of the human body through the light-transmitting earplug to achieve the effect of auxiliary treatment.

[0012] In order to solve the shortcomings of the prior art, the second preferred embodiment of the utility model proposes another optical assisted therapy earphone assembly for use with both ears, including two earphone units, two optical fibers, and a light emitter, each earphone unit including a shell and a light-transmitting earplug. One end of each optical fiber is connected to the earphone unit, and the other end is connected to the light emitter.

[0013] The shell has a front opening and a rear opening at the front and rear ends respectively, and a through shell channel is formed between the front opening and the rear opening. The light-transmitting earplug has an earplug opening, which is sleeved on the front end of the shell. The optical fiber has a first end and a second end, the second end extends into the light emitter, and the first end extends into the shell from the rear opening of the shell and is fixed to the shell channel. The light emitter includes an LED light-emitting unit, a light-guiding unit, an LED driving unit, and a DC power unit. The DC power unit supplies operating power to the LED light-emitting unit and the LED driving unit. The light-guiding unit is arranged between the LED light-emitting unit and the second end of the optical fiber, and guides the light emitted by the LED light-emitting unit into the two optical fibers. The wavelength range of the light emitted by the LED light-emitting unit is between 0.60 microns and 1000 microns. Through the light-guiding unit, the red light / infrared light is guided into the two optical fibers, and then transmitted to the earphone monomers of the two ears respectively. The red light / infrared light is emitted from the end of the optical fiber, and irradiates the outer ear and middle ear of the human body through the light-transmitting earplug, so as to achieve the effect of auxiliary treatment.

[0014] The advantages and spirit of the present invention can be further understood through the following detailed description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The provided drawings are used to provide a further understanding of the embodiments of the utility model, which constitute a part of the specification, are used to illustrate the implementation of the utility model, and together with the text description, explain the principle of the utility model. Obviously, the drawings described below are only some embodiments of the utility model, and are not used to limit the implementation of the utility model. For ordinary technicians in this field, other drawings can be derived from these drawings without creative work. The provided drawings include:

[0016] Figure 1 It is a schematic diagram of an earphone unit and an optical fiber in a first preferred embodiment of the optically assisted therapy earphone assembly of the utility model.

[0017] Figure 2 It is a schematic diagram of another embodiment of the earphone unit and the optical fiber in the optical assisted therapy earphone assembly of the present invention.

[0018] Figure 3 It is a schematic diagram of a light emitter and an optical fiber in a first preferred embodiment of the optically assisted therapy earphone assembly of the present invention.

[0019] Figure 4 It is a schematic diagram of a light emitter and an optical fiber in a second preferred embodiment of the optically assisted therapy earphone assembly of the present invention.

[0020] Reference numerals: earphone unit 1, housing 10, housing front opening 11, housing rear opening 12

[0021] Shell channel 13, light-transmitting earplug 20, earplug opening 21, light-transmitting opening 22

[0022] Optical fiber device 30, first end 31, second end 32, rough microstructure 33

[0023] Light emitter 40, LED light emitting unit 41, LED element 411

[0024] Light guide unit 42, light collection structure 421, LED driving unit 43, DC power unit 44

[0025] Light guide 50, light input end 51, light output end 52 DETAILED DESCRIPTION

[0026] The specific structural and functional details disclosed in the description of the utility model are only representative and schematic, and are used for the purpose of describing the exemplary embodiments of the utility model, and are not and do not need to be drawn according to actual dimensions. The utility model can be specifically implemented in many alternative forms and should not be interpreted as being limited to the embodiments disclosed herein.

[0027] It should be understood that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. in the description of the present utility model indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. Except for the applicant's special emphasis and limitation of their functional roles, they are only for the convenience of describing the present utility model, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as relative importance or the number of implied technical features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more. In addition, the term "including" and any variation thereof means "at least including".

[0028] It should also be understood that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" in the description of the present invention should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrally formed connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. A person of ordinary skill in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0029] Unless the context clearly indicates otherwise, the terms "one", "an item" in the description of the utility model are also intended to include the plural. It should also be understood that the terms "include" and / or "comprise" stipulate the existence of the stated features, steps, operations, units and / or components, but do not exclude the existence or addition of one or more other features, steps, operations, units, components and / or combinations thereof.

[0030] See also Figure 1 and Figure 3 , which is the first preferred embodiment of the utility model, is an optically assisted therapy earphone assembly for single ear use. The optically assisted therapy earphone assembly comprises an earphone unit 1, an optical fiber device 30, and a light emitter 40.

[0031] The earphone unit 1 includes a housing 10 and a light-transmitting earplug 20 .

[0032] The shell 10 has a front opening 11 and a rear opening 12 at the front and rear ends, respectively, and a through shell passage 13 is formed between the front opening 11 and the rear opening 12. It must be stated that the shell passage 13 does not need to be a straight passage, but can also be bent. When the rear opening 12 is set directly behind the shell 10, the shell passage 13 is close to a straight line. When the rear opening 12 is not set directly behind the shell 10, the shell passage 13 will be bent accordingly according to the position of the rear opening 12.

[0033] The light-transmitting earplug 20 is used to be inserted into the outer ear of the human body, and has an earplug opening 21 at one end, which is sleeved on the front end of the housing 10 and covers the housing front opening 11. Another light-transmitting opening 22 can be opened at the other end relative to the earplug opening 21 as needed to allow light and / or sound to be emitted.

[0034] The optical fiber device 30 is flexible and preferably uses a multi-mode coated optical fiber. The outer surface of the optical fiber device 30 can also be covered with an opaque insulating material to prevent damage and contamination. The optical fiber device 30 has a first end 31 and a second end 32. Figure 3 As shown, the second end 32 extends into the light emitter 40 to receive the red light or infrared light emitted by the light emitter 40; Figure 1 As shown, the first end 31 extends from the rear opening 12 of the housing into the housing 10 and is fixed to the housing passage 13. The red light or infrared light emitted by the light emitter 40 can be transmitted to the earphone unit 1 through the guidance of the optical fiber device 30. In this way, no electronic device is set in the earphone unit, the weight can be reduced to the lightest, and the comfort of the wearer is effectively improved.

[0035] Please see Figure 3 The light emitter 40 includes an LED light-emitting unit 41, a light-guiding unit 42, an LED driving unit 43, and a DC power unit 44. In order to provide a better auxiliary treatment effect, the wavelength range of the light emitted by the LED light-emitting unit 41 should be between 0.62 microns and 1000 microns. When an LED element with a wavelength range between 0.62 microns and 0.75 microns is selected, the light emitted by the LED element is red light. When an LED element with a wavelength range between 0.75 microns and 1000 microns is selected, the light emitted by the LED element is infrared light. The LED light-emitting unit 41 can be provided with one LED element 411 or multiple LED devices 411 according to the illumination requirements of auxiliary hearing treatment. This LED element 411 can use a packaged LED, or an unpackaged micro-LED or a mini-LED with a base.

[0036] The LED driving unit 43 includes electronic devices required to drive and control the LED light-emitting unit 41 to emit light. When the LED element 411 uses a packaged LED, or a micro-LED, or a mini-LED with a base, the electronic devices for driving and controlling the LED light emission will be slightly different, but the utility model does not limit this.

[0037] The DC power unit 44 supplies the operating power required by the LED light-emitting unit 41 and the LED driving unit 43. In the simplest embodiment, the DC power unit 44 is a power interface that introduces external DC power into the light emitter 40. In another embodiment, the DC power unit 44 also includes a power storage module, such as a battery, which directly supplies the DC power required by the LED light-emitting unit 41 and the LED driving unit 43, and can use disposable batteries or cyclically chargeable and dischargeable lithium batteries. In another embodiment, the DC power unit 44 also includes an AC-DC conversion circuit, which can receive external AC power and convert it into DC power, and then supply the DC power required by the LED light-emitting unit 41 and the LED driving unit 43, and store it in the battery.

[0038] Please see Figure 3 The light guide unit 42 is disposed between the LED light emitting unit 41 and the second end 32 of the optical fiber device 30, and guides the light emitted by the LED light emitting unit 41 into the optical fiber device 30. Preferably, the light guide unit 42 further includes an optical adhesive, which adheres and fixes the LED light emitting unit 41, the LED element 411 and the light guide unit 42, and also adheres and fixes the light guide unit 42 to the second end 32.

[0039] In a preferred embodiment, the light guide unit 42 further includes a light collecting structure 421, for example, a reflective sheet or a light guide plate with an inclined surface, such as Figure 3 As shown, the light emitted by the plurality of LED elements 411 is guided and concentrated to the second end 32 of the optical fiber device 30, thereby improving the efficiency of light use.

[0040] Please continue to see Figure 1 , the first end 31 of the optical fiber device 30 extends into the light-transmitting earplug 20, and the red light / infrared light emitted by the light emitter 40 is emitted through the endpoint of the first end 31, and then transmitted to the outer ear of the wearer through the light-transmitting earplug 20. Since the endpoint area of ​​the first end 31 of the optical fiber device 30 is small, the light emission is relatively concentrated. In order to achieve a better diffusion effect, so that the red light / infrared light is emitted to the contact position between the light-transmitting earplug 20 and the wearer's outer ear in a larger range and more evenly, preferably, the peripheral outer surface of the first end 31 of the optical fiber device 30 is also provided with a rough microstructure 33, and the red light / infrared light can be emitted to the light-transmitting earplug 20 in a more evenly divergent manner through the rough microstructure 33. The rough microstructure 33 can be made by frosting, sandblasting, or laser etching.

[0041] Please see Figure 2 In another embodiment for making the red light / infrared light be emitted more evenly over a wider range, the earphone unit 1 further comprises a light guide 50, which is arranged in the housing channel 13. The light guide 50 has a light input end 51 and a light output end 52, the light input end 51 is connected to the first end 31 of the optical fiber device 30, and the light output end 52 extends into the light-transmitting earplug 20. The first end 31 of the optical fiber device 30 does not need to be processed to set the rough microstructure 33, and the red light / infrared light is directly emitted from the first end 31 of the optical fiber device 30 into the light input end 51 of the light guide 50, and the rough microstructure 33 is arranged on the peripheral outer surface of the light output end 52 of the light guide 50, and the red light / infrared light is then emitted outwardly and evenly from the rough microstructure 33 of the light guide 50. Such an implementation can make it easier to process and manufacture the rough microstructure 33. According to the shape and size of the light-transmitting earplug 20, the rough microstructure 33 of different shapes and sizes can be manufactured on the peripheral outer surface of the light-emitting end 52 of the light guide 50, without the need for processing at the first end 31 of the optical fiber device 30. Preferably, the light-incoming end 51 of the light guide 50 can be connected to the first end 31 of the optical fiber device 30 by optical adhesive or fusion.

[0042] See also Figure 1 and Figure 4 , which is the second preferred embodiment of the utility model, is an optically assisted therapy earphone assembly for use with both ears. The optically assisted therapy earphone assembly 100 includes two earphone monomers 1, two optical fiber devices 30, and a light emitter 40.

[0043] The difference between this embodiment and the first embodiment is that the light emitter 40 is connected to two optical fiber devices 30 at the same time. Figure 4 , the light guide unit 42 transmits the red light / infrared light emitted by the LED light emitting unit 41 to the second ends 32 of the two optical fiber devices 30 at the same time: each optical fiber device 30 is then connected to an earphone monomer 1. In addition, the features of the earphone monomer 1, the optical fiber device 30, the LED light emitting unit 41, the LED driving unit 43, and the DC power unit 44 are the same as those of the first preferred embodiment.

[0044] In summary, in the optically assisted therapy earphone assembly proposed by the present invention, the light emitter 40 and the earphone unit 1 are separately arranged, and the illumination and power of the red light / infrared light can be flexibly set and adjusted on the light emitter 40 according to the needs of use and assisted therapy. The red light / infrared light is transmitted to the earphone unit 1 through the optical fiber device 30. There are no redundant electronic devices in the earphone unit 1, and the weight is reduced to a minimum, which provides better wearing comfort. The peripheral outer surface of the first end 31 of the optical fiber 30 or the light output end 52 of the light guide 50 is provided with a rough microstructure 33. The earphone unit 1 adopts a soft, light-transmitting earplug 20, so that the red light / infrared light can be more evenly dispersed and transmitted to the outer ear of the wearer through the light-transmitting earplug 20, thereby improving the effect of assisted therapy.

[0045] The above preferred embodiments are described in detail to more clearly describe the features and spirit of the present invention, but are not intended to limit the scope of the present invention. On the contrary, the purpose is to cover various equivalent changes within the scope of the claims to be applied for the present invention.

Claims

1. An optically assisted therapy earphone assembly, comprising an earphone unit (1), an optical fiber device (30), and a light emitter (40), wherein the earphone unit (1) comprises a housing (10) and a light-transmitting earplug (20), characterized in that: The shell (10) has a shell front opening (11) and a shell rear opening (12) at the front and rear ends respectively, and a penetrating shell passage (13) is formed between the shell front opening (11) and the shell rear opening (12); The light-transmitting earplug (20) has an earplug opening (21) which is sleeved on the front end of the housing (10); The optical fiber device (30) has a first end (31) and a second end (32), the second end (32) extends into the light emitter (40), and the first end (31) extends into the housing (10) from the rear opening (12) of the housing and is fixed to the housing passage (13); The light emitter (40) comprises an LED light emitting unit (41), a light guide unit (42), an LED driving unit (43), and a DC power unit (44); the DC power unit (44) supplies operating power to the LED light emitting unit (41) and the LED driving unit (43); the light guide unit (42) is arranged between the LED light emitting unit (41) and the second end (32) of the optical fiber device (30) to guide the light emitted by the LED light emitting unit (41) into the optical fiber device (30); The wavelength of light emitted by the LED light emitting unit (41) ranges from 0.62 micrometers to 1000 micrometers.

2. The optically assisted therapy headset assembly according to claim 1, characterized in that: The light emitted by the LED light emitting unit (41) is infrared light, and the wavelength range is between 0.75 micrometers and 1000 micrometers.

3. The optically assisted therapy earphone assembly according to claim 1, characterized in that: The first end (31) of the optical fiber device (30) extends into the light-transmitting earplug (20), and a rough microstructure (33) is also provided on the peripheral outer surface of the first end (31) for scattering light.

4. The optically assisted therapy earphone assembly according to claim 1, characterized in that: The earphone unit (1) further comprises a light guide (50), which is arranged in the shell channel (13) and has a light input end (51) and a light output end (52), wherein the light input end (51) is connected to the first end (31) of the optical fiber device (30), and the light output end (52) extends into the light-transmitting earplug (20), and the peripheral outer surface of the light output end (52) is also provided with a rough microstructure (33) for scattering light.

5. The optically assisted therapy earphone assembly according to claim 1, characterized in that: The LED light-emitting unit (41) comprises a plurality of LED elements (411), and the light-guiding unit (42) further comprises a light-collecting structure (421) for guiding and collecting the light emitted by the plurality of LED elements (411) to the second end (32) of the optical fiber device (30).

6. An optically assisted therapy earphone assembly, comprising two earphone units (1), two optical fiber devices (30), and a light emitter (40), wherein each of the earphone units (1) comprises a housing (10) and a light-transmitting earplug (20), characterized in that: One end of the two optical fiber devices (30) is connected to the light emitter (40), and the other end is connected to each earphone unit (1); The shell (10) has a shell front opening (11) and a shell rear opening (12) at the front and rear ends respectively, and a penetrating shell passage (13) is formed between the shell front opening (11) and the shell rear opening (12); The light-transmitting earplug (20) has an earplug opening (21) which is sleeved on the front end of the shell (10); The optical fiber device (30) has a first end (31) and a second end (32), the second end (32) extends into the light emitter (40), and the first end (31) extends into the housing (10) from the rear opening (12) of the housing and is fixed to the housing passage (13); The light emitter (40) comprises an LED light emitting unit (41), a light guide unit (42), an LED driving unit (43), and a DC power unit (44); the DC power unit (44) supplies operating power to the LED light emitting unit (41) and the LED driving unit (43); the light guide unit (42) is arranged between the LED light emitting unit (41) and the second end (32) of the optical fiber device (30) to guide the light emitted by the LED light emitting unit (41) into the two optical fiber devices (30); The wavelength of light emitted by the LED light emitting unit (41) ranges from 0.62 micrometers to 1000 micrometers.

7. The optically assisted therapy earphone assembly according to claim 6, characterized in that: The light emitted by the LED light emitting unit (41) is infrared light, and the wavelength range is between 0.75 micrometers and 1000 micrometers.

8. The optically assisted therapy earphone assembly according to claim 6, characterized in that: The first end (31) of the optical fiber device (30) extends into the light-transmitting earplug (20), and a rough microstructure (33) is also provided on the peripheral outer surface of the first end (31) for scattering light.

9. The optically assisted therapy earphone assembly according to claim 6, characterized in that: Each earphone unit (1) further comprises a light guide (50), which is arranged in the shell channel (13) and has a light input end (51) and a light output end (52), wherein the light input end (51) is connected to the first end (31) of the optical fiber device (30), and the light output end (52) extends into the light-transmitting earplug (20), and the peripheral outer surface of the light output end (52) is also provided with a rough microstructure (33) for scattering light.

10. The optically assisted therapy earphone assembly according to claim 6, characterized in that: The LED light-emitting unit (41) comprises a plurality of LED elements (411), and the light-guiding unit (42) further comprises a light-collecting structure (421) for guiding and collecting the light emitted by the plurality of LED elements (411) to the second end (32) of the optical fiber device (30).

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