TWI722580B - Far-infrared emitter - Google Patents

Abstract

A far-infrared (FIR) emitter is disclosed, which includes at least one far-infrared ray source for generating a far-infrared beam, a filter unit for filtering a wavelength range of the far-infrared beam, and a beam expander unit for expanding the far-infrared beam. The FIR emitter can generate a FIR light of a specific wavelength range and cover an enlarged exposure area.

Description

Far infrared irradiator

The present invention relates to a far-infrared irradiator, especially a far-infrared irradiator that is designed to cooperate with filtering and beam expansion, which can generate far-infrared rays with low heat energy and high optical power density, and can evenly diffuse to a required area.

Infrared is an electromagnetic wave with a wavelength between microwaves and visible light. Its wavelength ranges from 760 nanometers (nm) to 1 centimeter (mm). It is invisible light with a longer wavelength than red light. At room temperature, most of the heat radiation emitted by objects is in this band, which can be used in industry, military, science and medicine, etc. For example, thermal imaging devices can detect the temperature distribution of objects that generate heat sources and analyze the intensity of infrared rays. Thermal imaging display.

Due to the gradual increase in environmental protection awareness in recent years, in environmental testing, such as gas detection, water pollution, etc., infrared spectrometers are often used to measure the absorption of pollutants. According to the wavelength range: the wavelength range of near-infrared rays is about 0.7-2 microns (μm), the wavelength range of mid-infrared rays is about 3-5 microns, and the wavelength of far-infrared rays mainly falls in the wavelength band above 6-8 microns. Nowadays, many documents point out that the far-infrared rays emitted by far-infrared medical instruments have an effect on living organisms, which can promote blood circulation, improve metabolism, and promote tissue growth and regeneration.

As far as the conventional far-infrared irradiator used in care and medical treatment is concerned, its function is to eliminate fatigue, improve blood circulation and relieve muscle soreness after use. Most of its infrared rays are made from near-infrared to far-infrared wavelengths, with high temperatures and high temperatures. The problem of power consumption. The heating effect of irradiating far-infrared rays is mainly caused by the near-infrared and mid-infrared rays of the light source. However, when using the far-infrared irradiator as a care and medical treatment, the ideal care light source should be pure far-infrared rays. Generally, the infrared rays generated by black body radiation are not pure far-infrared rays and must be filtered to remove short-wavelength infrared rays.

Secondly, although the conventional far-infrared irradiator has a larger irradiation range in use, it is relatively bulky, consumes more energy, and the user may not be able to move at will. In addition, the conventional far-infrared irradiator often uses the method of heating large-volume ceramic plates or carbon fiber materials, which consumes energy and generates high temperatures. Long-term irradiation is prone to discomfort and burns. If it is only applied to a local part, it is easy to cause the irradiation area. Waste. In addition, since the filters used to filter out far-infrared rays of some far-infrared wavelengths are more expensive, in order to save costs, it is desirable to use a smaller-area far-infrared light source to pass through the far-infrared light filter, and then expand the output light to irradiate more Large area. The use of a small-area far-infrared light source can also save energy.

According to this, how to have a "far-infrared irradiator" that can generate low energy consumption and high optical power density, and can evenly diffuse to the required area, is an urgent issue to be solved by those in the related art.

In one embodiment, the present invention provides a far-infrared irradiator, including: At least one far-infrared light source for generating a first far-infrared light beam; A filter unit arranged in the path of the first far-infrared light beam for filtering out a wavelength range of the first far-infrared light beam and forming a second far-infrared light beam; and A beam expanding unit provides the second far-infrared beam to pass through and expands the second far-infrared beam to form a third far-infrared beam. The beam expanding unit is a scattering structure and includes: A scattering subject; and A scattering part is arranged on the scattering body, and the scattering part has a micro structure. After the second far-infrared light beam is directed to the scattering part, it is scattered and expanded to form a third far-infrared light beam.

Please refer to FIG. 1, a far-infrared irradiator 10 provided by the present invention includes a far-infrared light source 12, a filter unit 14 and a beam expanding unit 16.

The far-infrared light source 12 is used to generate a first far-infrared light beam L1. The far-infrared light source 12 is a light source that can efficiently generate far-infrared rays by heating, such as heating semiconductor chips, ceramic substrates, coils or filaments, micro-electromechanical chips, carbon fibers, and other materials; it may also be a far-infrared light-emitting diode or far-infrared light source. Infrared laser. The type of the far-infrared light source 12 is not limited, and a suitable light source can be selected according to the needs of use.

The filter unit 14 is disposed in the path of the first far-infrared light beam L1 to filter out a wavelength range of the first far-infrared light beam L1 to form a second far-infrared light beam L2. The type of the filter unit 14 is not limited and the range of wavelengths that can be filtered is not limited. According to actual design requirements, the filter unit 14 can filter out the high temperature band, and can choose to filter out a certain wavelength or filter out a shorter wavelength, for example Filters or filters that can filter far-infrared beams with a wavelength equal to or less than 6 microns can be used. It must be noted that this embodiment is provided with a far-infrared light source 12, in addition to that, a plurality of far-infrared light sources 12 can also be provided, and each far-infrared light source 12 can generate a far-infrared light beam and integrate it into the first far-infrared light source. The far-infrared light beam L1 then passes through the filter unit 14.

In addition, FIG. 1 shows that a heat insulation unit 18 can be provided between the far-infrared light source 12 and the filter unit 14 to isolate the heat conduction between the far-infrared light source 12 and the irradiation target; however, depending on the packaging and the far-infrared light source 12 itself The heat insulation unit 18 is not an essential element due to the thermal energy caused by electricity.

As shown in FIG. 1, in this embodiment, the beam expanding unit 16 is a scattering structure, which includes a scattering body 161 and a scattering part 162. The scattering part 162 is disposed on the scattering body 161. The scattering part 162 has a microstructure. The surface of the main body 161 with the scattering portion 162 is a plane 1611, 1612, and the surface of the plane 1611, 1612 with the scattering portion 162 has an included angle θ less than 180 degrees. After the second far-infrared light beam L2 is directed to the scattering part 162, the second far-infrared light beam L2 is scattered and enlarged by the microstructure to form a third far-infrared light beam L3. The irradiation area A3 of the third far-infrared light beam L3 is larger than that of the second far-infrared light beam L3. The irradiation area A2 of the light beam L2. In addition, with the optical simulation design, the angle of the scattering light path of the far-infrared light source 12, the filter unit 14 or the beam expansion unit 16 can be adjusted to make it uniformly scattered to the desired irradiation range.

Please refer to FIG. 2, a far-infrared irradiator 20 provided by this embodiment includes a far-infrared light source 22, a filtering unit 24 and a beam expanding unit 26. The far-infrared light source 22 generates a first far-infrared light beam L1; the filter unit 24 is used for filtering a wavelength range of the first far-infrared light beam L1 to form a second far-infrared light beam L2. The beam expanding unit 26 is used for expanding the second far-infrared light beam L2 to form a third far-infrared light beam L3.

The beam expander unit 26 is a scattering structure that includes a scattering body 261 and a scattering part 262. The scattering part 262 is disposed on the scattering body 261. The scattering part 262 has a microstructure. The scattering body 261 has a convex surface. Curved surface 2611, 2612. The main difference between this embodiment and the embodiment in FIG. 1 is that the surface of the scattering body 261 of this embodiment provided with the scattering portion 262 is a convex arc surface 2611, 2612, as for the surface of the scattering body 161 of FIG. 1 where the scattering portion 162 is provided is a flat surface 1611 , 1612.

After the second far-infrared light beam L2 is directed to the scattering part 262, the second far-infrared light beam L2 is scattered and expanded by the microstructure to form a third far-infrared light beam L3. The irradiation area A3 of the third far-infrared light beam L3 is larger than that of the second far-infrared light beam. The irradiation area A2 of the light beam L2. With the arc design of the convex arc surface 2611, 2612, the scattering angle of the second far-infrared light beam L2 can be changed, and the expanded third far-infrared light beam L3 can also have a different irradiation area A3.

Please refer to FIG. 3, a far-infrared irradiator 30 provided by the present invention includes a far-infrared light source 32, a filter unit 34 and a beam expanding unit 36. The far-infrared light source 32 generates a first far-infrared light beam L1; the filter unit 34 is used for filtering a wavelength range of the first far-infrared light beam L1 to form a second far-infrared light beam L2. The beam expanding unit 36 is used for expanding the second far-infrared light beam L2 to form a third far-infrared light beam L3.

This embodiment combines the structures of the embodiments in Figures 1 and 2. The beam expansion unit 36 is a scattering structure that includes a scattering body 361 and a scattering part 362. The scattering part 362 is disposed on the scattering body 361, and the scattering part 362 has a micro structure. The surface of the scattering body 361 provided with the scattering portion 362 includes two forms, one of which is a flat surface 3611 and the other is a convex arc surface 3612.

After the second far-infrared light beam L2 is directed to the scattering part 362, the second far-infrared light beam L2 is scattered and expanded by the microstructure to form a third far-infrared light beam L3. The irradiation area A3 of the third far-infrared light beam L3 is larger than that of the second far-infrared light beam. The irradiation area A2 of the light beam L2. With the design of the flat surface 3611 and the convex arc surface 3612, the scattering angle of the second far-infrared light beam L2 can be changed, so that the expanded third far-infrared light beam L3 has a different irradiation area A3.

Please refer to FIG. 4, a far-infrared irradiator 40 provided by the present invention includes a far-infrared light source 42, a filtering unit 44 and a beam expanding unit 46. The far-infrared light source 42 generates a first far-infrared light beam L1; the filter unit 44 is used for filtering a wavelength range of the first far-infrared light beam L1 to form a second far-infrared light beam L2. The beam expanding unit 46 is used for expanding the second far-infrared light beam L2 to form a third far-infrared light beam L3.

This embodiment is a derivative structure of the embodiment in FIG. 3, the beam expander unit 46 is a scattering structure, which includes a scattering body 461, a scattering portion 462, and a reflection portion 463; the scattering portion 462 is disposed on the scattering body 461, and the scattering portion 462 has With a micro structure, the surface of the scattering body 461 with the scattering portion 462 is a flat surface 4611, and the reflecting portion 463 is a convex arc surface with reflective properties.

After the second far-infrared light beam L2 is directed to the beam expanding unit 46, a part of the second far-infrared light beam L2 is directed to the scattering part 462, and the scattered light beam L31 is formed by the microstructure scattering; and the other part of the second far-infrared light beam L2 is directed to the reflecting part 463, the reflection part 463 forms a reflected light beam L32; the scattered light beam L31 and the reflected light beam L32 converge to form a third far-infrared light beam L3. The irradiation area A3 of the third far-infrared light beam L3 is larger than the irradiation area A2 of the second far-infrared light beam L2.

Please refer to FIG. 5, a far-infrared irradiator 50 provided by the present invention includes a far-infrared light source 52, a filter unit 54 and a beam expanding unit 56. The far-infrared light source 52 generates a first far-infrared light beam L1; the filter unit 54 is used for filtering a wavelength range of the first far-infrared light beam L1 to form a second far-infrared light beam L2. The beam expanding unit 56 is used for expanding the second far-infrared light beam L2 to form a third far-infrared light beam L3.

This embodiment is a derivative structure of the embodiment in FIG. 4, the beam expanding unit 56 is a scattering structure, which includes a scattering body 561, a scattering part 562, and a reflection part 563; the scattering part 562 is disposed on the scattering body 561, and the scattering part 562 has In the microstructure, the surface of the scattering body 561 provided with the scattering portion 562 is a flat surface 5611. The difference between this embodiment and the embodiment in FIG. 4 is that the reflective portion 563 of this embodiment is a flat surface with reflective properties.

Please refer to FIG. 6, a far-infrared irradiator 60 provided by this embodiment includes a far-infrared light source 62, a filter unit 64 and a beam expanding unit 66. The far-infrared light source 62 generates a first far-infrared light beam L1; the filter unit 64 is used for filtering a wavelength range of the first far-infrared light beam L1 to form a second far-infrared light beam L2. The beam expanding unit 66 is used to expand the second far-infrared light beam L2 to form a third far-infrared light beam L3.

The beam expanding unit 66 is a scattering structure, which includes a scattering body 661 and a scattering part 662. The scattering part 662 is disposed on the scattering body 661. The scattering part 662 has a microstructure. The scattering part 662 has a convex surface. Arc 6611. The main difference between this embodiment and the embodiment of FIG. 2 is that the main body 661 of this embodiment has only one convex arc surface 6611, and the main body 261 of FIG. 2 has two convex arc surfaces 2611, 2612. The convex arc surface 6611 of the main body 661 of this embodiment can also be replaced with the planes 1611, 1612, 3611, 4611, 5611 in FIGS. 1, 3 to 5.

After the second far-infrared light beam L2 is directed to the scattering part 662, the second far-infrared light beam L2 is scattered and enlarged by the microstructure to form a third far-infrared light beam L3. The irradiation area A3 of the third far-infrared light beam L3 is larger than that of the second far-infrared light beam. The irradiation area A2 of the light beam L2. With the arc design of the convex arc surface 6611, the scattering angle of the second far-infrared light beam L2 can be changed, and the expanded third far-infrared light beam L3 can also have a different irradiation area A3.

Please refer to FIG. 7, a far-infrared irradiator 70 provided by the present invention includes a far-infrared light source 72, a filter unit 74 and a beam expanding unit 76. The far-infrared light source 72 generates a first far-infrared light beam L1; the filtering unit 74 is used for filtering a wavelength range of the first far-infrared light beam L1 to form a second far-infrared light beam L2. The beam expanding unit 76 is used for expanding the second far-infrared light beam L2 to form a third far-infrared light beam L3.

In this embodiment, the beam expanding unit 76 is a reflective structure, which includes a reflective body 761 and a reflective portion 762. The reflective portion 762 is a convex arc surface. The main difference between this embodiment and the embodiment in FIG. The beam expanding unit 76 is a reflective structure and does not have a microstructure.

After the second far-infrared light beam L2 is directed to the reflecting part 762, it is reflected and emitted out of the reflective body 761 to expand to form a third far-infrared light beam L3. The irradiation area A3 of the third far-infrared light beam L3 is larger than the irradiation area A2 of the second far-infrared light beam L2 . A coating with reflective properties can be provided on the reflective portion 762 to enhance the reflectivity of the second far-infrared light beam L2.

It is worth noting that the applicant in this case filed an application for a Chinese national name patent on July 16, 107, the Republic of China. The number of the application is 107124431, and the invention name is "Far Infrared Irradiator". Because of its patentability, it has already received economic The Ministry of Intellectual Property Bureau approved the review and the date of publication is August 29, 108 of the Republic of China. The embodiments of Figures 4 and 5 of the present case combine the technical means of the beam expanding unit of the above patented invention as a reflective structure, and the scattering part and the reflecting part of this case can be flat or convex arc surfaces, so that the area of the far-infrared beam irradiated by this case Changes are more diverse.

The embodiments shown in FIG. 1 to FIG. 7 show that the beam expander unit of this case has different design aspects, but the purpose is the same, which is to expand the irradiation area of the second far-infrared beam. For example, when a chip-shaped far-infrared light source is used for the purpose of lightness and portability, the irradiation area of the infrared beam generated by it is generally less than 5 square millimeters (mm ² ), so the infrared beam is expanded by the beam expander unit To the required area, for example, 3 cm x 5 cm, at the same time it can produce a highly uniform light field. The beam expander unit of this case (for example, the beam expander unit 16, 26, 36, 46, 56, 66, 76 of Fig. 1 to Fig. 7) and the filter unit (for example, the filter unit 14, 24, 34, 44 of Fig. 1 to Fig. 7) ,54,64,74) can be integrated into a unit, while providing beam expansion and filtering functions.

In summary, the far-infrared irradiator provided by the present invention, combined with a filter and a beam expanding optical path design, can generate far-infrared rays with low heat energy and high optical power density, which can reduce the loss of electric power, has a specific wavelength, is small in size, and can be The advantages of uniformly diffusing far-infrared rays to the required area (for example, 3 cm x 5 cm), etc., and can be applied to devices that are irradiated at close distances (less than 10 cm) without causing damage to the skin. It is suitable for the application or development of various industrial technical fields Wearable or portable devices with low power consumption and low temperature light sources. For example, wearable medical modules with far infrared and microwave sensors can be used in the care of dialysis fistula.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the relevant technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be determined by the scope of the attached patent application.

10, 20, 30, 40, 50, 60, 70: far infrared irradiator 12, 22, 32, 42, 52, 62, 72: far infrared light source 14, 24, 34, 44, 54, 64, 74: filter unit 16, 26, 36, 46, 56, 66, 76: beam expander unit 161, 261, 361, 461, 561, 661: scattering subject 162, 262, 362, 462, 562, 662: Scattering part 1611, 1612, 3611, 4611, 5611: plane 2611, 2612, 3612, 6611: convex arc 463, 563, 762: reflection part 761: Reflective Subject 18: Thermal insulation unit A2, A3: Irradiation area L1: The first far-infrared beam L2: Second far infrared beam L3: The third far-infrared beam L31: Scattered beam L32: reflected beam θ: included angle

Fig. 1 is a schematic structural diagram of a specific embodiment of the present invention. 2 to 7 are schematic structural diagrams of different specific embodiments of the present invention.

no

10: Far infrared irradiator

12: far infrared light source

14: Filter unit

16: Expanding beam unit

161: Scattering Subject

1611, 1612: plane

162: Scattering part

18: Thermal insulation unit

A2, A3: Irradiation area

L1: The first far-infrared beam

L2: Second far infrared beam

L3: The third far-infrared beam

θ: included angle

Claims (8)

A far-infrared irradiator includes: at least one far-infrared light source for generating a first far-infrared light beam; a filter unit arranged in the path of the first far-infrared light beam for the first far-infrared light beam A wavelength range filters and forms a second far-infrared beam; and a beam expanding unit for providing the second far-infrared beam to pass through and expanding the second far-infrared beam to form a third far-infrared beam, the beam expanding unit It is a scattering structure, which includes: a scattering body; and a scattering part disposed on the scattering body. The scattering part has a micro structure. After the second far-infrared light beam is directed to the scattering part, it is scattered and expanded to form the first scattering part. Three far-infrared light beams; the surface of the scattering body provided with the microstructure is at least one of a flat surface or a convex arc surface or a combination thereof. The far-infrared irradiator described in the first item of the scope of patent application, wherein the surface of the scattering body provided with the microstructure is two planes, and the two planes with the scattering portion have an included angle of less than 180 degrees. The far-infrared irradiator described in the first item of the scope of patent application, wherein the scattering body further includes a reflecting part, the reflecting part has reflective properties, and part of the second far-infrared light beam is directed to the scattering part and is scattered by the microstructure A scattered light beam is formed; another part of the second far-infrared light beam is directed to the reflecting part and is reflected by the reflecting part to form a reflected light beam; the scattered light beam and the reflected light beam are combined to form the third far-infrared light beam. The far-infrared irradiator described in item 3 of the scope of patent application, wherein the reflecting portion is at least one of a flat surface or a convex arc surface or a combination thereof. The far-infrared irradiator described in item 1 of the scope of patent application, wherein the at least one far The infrared light source is produced by heating materials that can generate far infrared rays, such as heating semiconductor chips, ceramic substrates, coils or filaments, MEMS chips, carbon fibers; or far infrared light emitting diodes or far infrared lasers. The far-infrared irradiator described in the first item of the scope of patent application, wherein the filter unit is a filter or filter that filters far-infrared light beams with a wavelength equal to or less than 6 microns. The far-infrared irradiator according to the first item of the scope of patent application, wherein a heat insulation unit is provided between the at least one far-infrared light source and the filter unit to isolate the heat conduction between the at least one far-infrared light source and the filter unit . In the far-infrared irradiator described in item 1 of the scope of patent application, the beam expander unit and the filter unit are integrated into one unit, and simultaneously provide beam expander and filter functions.

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