Optical detector for sweat detection

Abstract

The embodiment of the utility model discloses an optical detector for sweat detection. The optical detector comprises a tube seat, pins and a tube cap, the tube base is provided with a first surface and a second surface which are opposite, and the light emitting chip and the light receiving chip are arranged on the first surface at intervals. The tube cap covers the first surface, the tube cap and the first surface define an accommodating cavity, the partition element divides the accommodating cavity into a first sub-cavity and a second sub-cavity, the first sub-cavity accommodates the light emitting chip, and the second sub-cavity accommodates the light receiving chip. A light-transmitting element is arranged on the side, away from the first surface, of the pipe cap, light is allowed to be transmitted between the first sub-cavity and the outside of the pipe cap, and light is allowed to be transmitted between the second sub-cavity and the outside of the pipe cap. According to the invention, the two sub-cavities which are physically isolated from each other are arranged in the tube cap and are used for accommodating the light emitting chip and the light receiving chip respectively, so that crosstalk light and external interference can be effectively isolated, the overall size is reduced due to the integrated design, and the flexibility of an application scene is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensor manufacturing, in particular to a light detector for sweat detection. Background Art

[0002] A photodetector used for sweat detection is a device that converts optical signals into electrical signals. They have widespread applications in many fields, such as consumer electronics, healthcare, and sensors. Specifically, in the medical and health monitoring fields, a photodetector used for sweat detection can transmit a light signal focused on the surface of human skin, receive diffuse reflections from the skin, and analyze information such as the human heart rate and sweat level using echo power and waveform. In practical applications, to ensure the accuracy of information analysis, it is necessary to effectively isolate and control crosstalk light that is not diffusely reflected by human skin. Failure to effectively isolate crosstalk light will cause severe interference, affecting the accuracy and reliability of the analysis results. In addition, because the photodetector used for sweat detection needs to be close to the human body surface, the transmitter and receiver of the entire detector need to be encapsulated in an airtight cavity.

[0003] Commonly used sweat detection photodetectors typically encapsulate the transmitter and receiver chips in separate airtight cavities. While this approach effectively ensures airtightness between the transmitter and receiver, and effectively isolates crosstalk, it requires external fixtures to assemble the transmitter and receiver. This results in a relatively large overall size for sweat detection photodetectors, limiting their application scenarios. Utility Model Content

[0004] An embodiment of the present invention provides a light detector for sweat detection, so as to reduce the volume of the light detector for sweat detection while reducing optical crosstalk.

[0005] In order to solve the above technical problems, the embodiments of the present utility model disclose the following technical solutions:

[0006] Provided is a light detector for sweat detection, comprising:

[0007] a tube base having a first surface and a second surface arranged opposite to each other along a first direction;

[0008] A plurality of pins, wherein the plurality of pins pass through the first surface and the second surface of the tube holder and are insulated and connected to the tube holder;

[0009] a light emitting chip and a light receiving chip, the light emitting chip and the light receiving chip being spaced apart and arranged on the first surface, and both the light emitting chip and the light receiving chip being electrically connected to the pins;

[0010] a tube cap, the tube cap being disposed on the first surface and enclosing a receiving cavity with the first surface; a partition element being disposed in the receiving cavity, the partition element extending along the first direction to separate the receiving cavity into a first sub-cavity and a second sub-cavity that are physically isolated from each other; a light-transmitting element being disposed on a side of the tube cap facing away from the first surface to allow light to be transmitted between the first sub-cavity and the exterior of the tube cap, and between the second sub-cavity and the exterior of the tube cap;

[0011] The first sub-cavity accommodates the light emitting chip, and the second sub-cavity accommodates the light receiving chip.

[0012] In addition to one or more of the features disclosed above, or as an alternative, the tube cap includes a tube body and a top wall connected to each other, the top wall and the first surface are respectively connected to the two ends of the tube body in the first direction to jointly define the accommodating cavity, and the light-transmitting element includes two light-transmitting mirrors arranged separately from each other, both of the light-transmitting mirrors are arranged on the top wall, one of the two light-transmitting mirrors covers the first sub-cavity, and the other of the two light-transmitting mirrors covers the second sub-cavity.

[0013] In addition to or instead of one or more features disclosed above, the tube cap includes a tube body, the light-transmitting element includes a light-transmitting mirror, and the light-transmitting mirror and the first surface are respectively connected to the two ends of the tube body in the first direction to jointly define the accommodating cavity.

[0014] In addition to or as an alternative to one or more of the features disclosed above, the tube cap includes a tube body and a top wall connected to each other, the top wall and the first surface are respectively connected to the two ends of the tube body in the first direction to jointly define the accommodating cavity, and the light-transmitting element includes a light-transmitting mirror, which is provided on the top wall, a portion of the light-transmitting mirror covers the first sub-cavity, and another portion of the light-transmitting mirror covers the second sub-cavity.

[0015] In addition to or as an alternative to one or more of the features disclosed above, the light-transmitting mirror is covered with an anti-reflection film, and the passband center wavelength of the anti-reflection film is 980 nm or 1450 nm.

[0016] In addition to or as an alternative to one or more of the features disclosed above, the partition element and the pipe cap are connected to each other and are integrally formed with the pipe body.

[0017] In addition to or as an alternative to one or more of the features disclosed above, the partition element is made of an opaque material.

[0018] In addition to or as an alternative to one or more of the features disclosed above, the tube cap further comprises a first solder ring and a second solder ring, wherein the first solder ring is located on a side of the first subcavity away from the light-transmitting element and is disposed along an edge of the partition element and a portion of an edge of the tube body; and the second solder ring is located on a side of the second subcavity away from the light-transmitting element and is disposed along an edge of the partition element and a portion of an edge of the tube body.

[0019] A first convex ring and a second convex ring are provided on the first surface. The first convex ring surrounds the light emitting chip and is welded to the first welding ring. The second convex ring surrounds the light receiving chip and is welded to the second welding ring.

[0020] In addition to or as an alternative to one or more of the features disclosed above, the tube cap further comprises a solder ring, the solder ring being arranged along an edge of the tube body on a side away from the light-transmitting element;

[0021] A convex ring is provided on the first surface, surrounding both the light emitting chip and the light receiving chip. The convex ring is welded to the welding ring, and a side surface of the partition element close to the first surface is in contact with the first surface.

[0022] In addition to one or more of the features disclosed above, or as an alternative, the tube seat includes a first support block and a second support block, the first support block and the second support block are both located on the first surface and fixedly connected to the first surface, the first support block and the second support block are spaced apart, the light emitting chip is mounted on the first support block, and the light receiving chip is mounted on the second support block.

[0023] One of the above technical solutions has the following advantages or beneficial effects: Integrating the light emitting chip and the light receiving chip on the first surface eliminates the need for additional external fixtures and simplifies the assembly process. This integrated design reduces the overall volume and increases application flexibility. Two physically isolated first and second sub-cavities are provided in the tube cap, accommodating the light emitting chip and the light receiving chip, respectively, effectively isolating the light from crosstalk and external interference.

[0024] It is worth mentioning that the main component of sweat is water. In the infrared region, especially in the near-infrared (NIR) and mid-infrared (MIR) regions, water molecules will show strong absorption peaks. Specifically, the absorption bands exhibited by water molecules in the near-infrared (NIR) and mid-infrared (MIR) regions have strong absorption peaks near 980nm and near 1450nm. Therefore, the present application can achieve a light transmittance of 980nm or 1450nm wavelength of 90% by coating an anti-reflection film with a passband center wavelength of 980nm or 1450nm on the light-transmitting mirror, and use a light source near 980nm or 1450nm to detect specific skin parts, which can effectively measure the content of water molecules in sweat and improve detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The technical solutions and other beneficial effects of the present invention will be made apparent by describing in detail the specific embodiments of the present invention in conjunction with the accompanying drawings.

[0026] Figure 1 Schematic diagram of the structure of the optical detector for sweat detection provided in an embodiment of the present application (excluding the cap);

[0027] Figure 2 This is a schematic structural diagram of a light-transmitting element in a light detector for sweat detection provided in Example 1 of the present application;

[0028] Figure 3 This is a schematic structural diagram of a light-transmitting element in a light detector for sweat detection provided in Example 2 of the present application;

[0029] Figure 4 This is a schematic structural diagram of a light-transmitting element in a light detector for sweat detection provided in Example 3 of the present application;

[0030] Figure 5 This is a structural diagram of a welding method between a tube cap and a tube base provided in an embodiment of the present application;

[0031] Figure 6 This is a structural diagram of another welding method between a tube cap and a tube base provided in an embodiment of the present application;

[0032] Description of reference numerals:

[0033] 00, tube seat; 001, first surface; 002, second surface; 003, first support block; 004, second support block;

[0034] 10. Pins;

[0035] 20. Tube cap; 201. Light-transmitting element; 2011. Light-transmitting mirror; 202. Partitioning element; 203. First sub-cavity; 204. Second sub-cavity; 205. Solder ring; 206. First solder ring; 207. Second solder ring; 208. Tube body; 2081. Bump; 209. Top wall;

[0036] 30. Optical transmitter chip; 40. Optical receiver chip;

[0037] 50. Anti-reflection coating;

[0038] 60. Object to be tested. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and beneficial effects of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described in this specification are only for the purpose of explaining the present invention and are not intended to limit the present invention.

[0040] The present invention discloses a light detector for sweat detection. Figure 1 and Figure 2 The optical detector for sweat detection includes: a tube base 00, a plurality of pins 10, a tube cap 20, a light emitting chip 30, and a light receiving chip 40. Specifically, the tube base 00 has a first surface 001 and a second surface 002 arranged opposite to each other along a first direction. The plurality of pins 10 pass through the first surface 001 and the second surface 002 of the tube base 00 and are insulated and connected to the tube base 00. The light emitting chip 30 and the light receiving chip 40 are arranged on the first surface 001 at intervals and are both electrically connected to the pins 10. The tube cap 20 is covered on the first surface 001 and encloses the first surface 001 to form a receiving cavity. A partition element 202 is provided in the receiving cavity. The partition element 202 extends along the first direction and divides the receiving cavity into a first sub-cavity 203 and a second sub-cavity 204 that are physically isolated from each other. A light-transmitting element 201 is provided on the side of the tube cap 20 facing away from the first surface 001. The light-transmitting element 201 allows light to be transmitted between the first sub-cavity 203 and the outside of the tube cap 20, and allows light to be transmitted between the second sub-cavity 204 and the outside of the tube cap 20. The first sub-cavity 203 accommodates the light emitting chip 30, and the second sub-cavity 204 accommodates the light receiving chip 40.

[0041] This application integrates the optical transmitter chip 30 and the optical receiver chip 40 on the first surface 001, eliminating the need for additional external fasteners and simplifying the assembly process. This integrated design reduces the overall volume and increases application flexibility. Two physically isolated first and second subcavities 203 and 204 are provided within the tube cap 20, accommodating the optical transmitter chip 30 and the optical receiver chip 40, respectively, effectively isolating crosstalk and external interference.

[0042] Hereinafter, the implementation of the light-transmitting element 201 will be described in detail in combination with different embodiments.

[0043] Example 1

[0044] Reference Figure 2 In the first embodiment, the tube cap 20 includes a tube body 208 and a top wall 209 that are connected together. The top wall 209 and the first surface 001 are respectively connected to the ends of the tube body 208 in the first direction to jointly define a receiving cavity. Specifically, the tube body 208 is a hollow tubular structure with two open ends. The top wall 209 is integrally formed with the tube body 208, sealing the opening at one end of the tube body 208. The light-transmitting element 201 includes two separate light-transmitting mirrors 2011. Both light-transmitting mirrors 2011 are disposed on the top wall 209. One of the two light-transmitting mirrors 2011 covers the first sub-cavity 203, and the other of the two light-transmitting mirrors 2011 covers the second sub-cavity 204. With this arrangement, the light-transmitting mirror 2011 corresponding to the first sub-cavity 203 can transmit the laser light emitted by the light-emitting chip 30 from the first sub-cavity 203 to the object under test 60, and the light-transmitting mirror 2011 corresponding to the second sub-cavity 204 can transmit the diffuse reflection of the object under test 60 from the outside of the tube cap 20 to the inside of the second sub-cavity 204. In the first embodiment, two separate through-slots are formed in the top wall 209, one of which communicates with the first sub-cavity 203 and the other communicates with the second sub-cavity 204. A light-transmitting mirror 2011 is then embedded in each through-slot, thereby achieving the arrangement of the light-transmitting mirror 2011 on the top wall 209. It should be noted that the light-transmitting mirror 2011 can be embedded in the through-slot by solder sintering to ensure the airtightness of the first sub-cavity 203 and the second sub-cavity 204.

[0045] Example 2

[0046] Reference Figure 3The difference between Example 2 and Example 1 is that the light-transmitting element 201 only includes a light-transmitting mirror 2011. Furthermore, in Example 2, the tube cap 20 only includes a tube body 208. The structure of the tube body 208 in Example 2 is the same as that in Example 1, also being a hollow tubular structure with openings at both ends. In Example 2, the light-transmitting mirror 2011 acts as the top wall 209 in Example 1, connected to one end of the tube body 208 and sealing the opening at one end of the tube body 208. The light-transmitting mirror 2011 is connected to the first surface 001 at both ends of the tube body 208 in the first direction, thereby jointly defining a receiving cavity. Furthermore, to enhance the stability of the connection between the light-transmitting mirror 2011 and the tube body 208, a protrusion 2081 is provided at the opening of the end of the tube body 208 that is connected to the light-transmitting mirror 2011. The protrusion 2081 abuts against the side of the light-transmitting mirror 2011 that faces away from the receiving cavity. Furthermore, in the second embodiment, the light-transmitting mirror 2011 may also be connected to the tube body 208 by soldering.

[0047] Example 3

[0048] Reference Figure 4 The difference between Example 3 and Example 2 lies in that the tube cap 20 includes a tube body 208 and a top wall 209, with a light-transmitting mirror 2011 disposed on the top wall 209. In Example 3, the tube body 208 is still a hollow tubular structure with openings at both ends. The top wall 209 is integrally formed with the tube body 208, sealing the opening at one end of the tube body 208 and defining a receiving cavity together with the first surface 001. The difference between Example 3 and Example 1 lies in that the light-transmitting element 201 includes only one light-transmitting mirror 2011. A portion of the light-transmitting mirror 2011 covers the first sub-cavity 203, while another portion of the light-transmitting mirror 2011 covers the second sub-cavity 204. With this arrangement, laser energy emitted by the light-emitting chip 30 is transmitted to the object under test 60 through the portion of the light-transmitting mirror 2011 corresponding to the first sub-cavity 203, while diffusely reflected energy from the object under test 60 is transmitted into the second sub-cavity 204 through the other portion of the light-transmitting mirror 2011 corresponding to the second sub-cavity 204. In the third embodiment, a through groove is opened on the top wall 209, and the through groove is connected to the first sub-cavity 203 and the second sub-cavity 204 at the same time. Then, a light-transmitting mirror 2011 is embedded in the through groove to achieve a part of the light-transmitting mirror 2011 covering the first sub-cavity 203 and another part of the light-transmitting mirror 2011 covering the second sub-cavity 204.

[0049] It should be noted that the light-transmitting mirror 2011 disclosed in the above-mentioned embodiments 1, 2, and 3 may be a plane mirror or a convex lens. The convex lens can focus the laser light emitted by the light-emitting chip 30, thereby improving the laser's penetration ability, and can also focus the light reflected back by diffuse reflection from the skin surface, thereby improving the efficiency of receiving the diffusely reflected light.

[0050] In order to more clearly introduce the optical detector for sweat detection provided by the present application, based on any of the above technical solutions, the similarities in the structure of the optical detector for sweat detection will be further introduced.

[0051] In the optical detector for sweat detection disclosed in this application, the light emitting chip 30 and the light receiving chip 40 are arranged at intervals on the first surface 001 so as to be accommodated in different sub-cavities when the tube cap 20 is connected to the tube base 00. This application provides a method for fixing the chip. Figure 1 The tube base 00 includes a first support block 003 and a second support block 004. Both the first support block 003 and the second support block 004 are located on the first surface 001 and are fixedly connected to the first surface 001. The first support block 003 and the second support block 004 are spaced apart. The light emitting chip 30 is mounted on the first support block 003, and the light receiving chip 40 is mounted on the second support block 004. It should be noted that the shape of the first support block 003 can be a rectangular parallelepiped, a polygonal prism, or a cylinder. The shape of the second support block 004 can be a rectangular parallelepiped, a polygonal prism, or a cylinder. In some embodiments, the light emitting chip 30 can be mounted on the surface of the first support block 003 parallel to the first surface 001, or on a side surface of the first support block 003. When the light emitting chip 30 is mounted on a side surface of the first support block 003, it is typically mounted on the side surface of the first support block 003 facing away from the second support block 004. In some embodiments, the light receiving chip 40 is typically mounted on a surface of the second support block 004 parallel to the first surface 001. It should be noted that in some embodiments, the light emitting chip 30 and the light receiving chip 40 may also be mounted directly on the first surface 001 with spacing therebetween. Furthermore, the plurality of pins 10 include at least bias signal pins 10 and chip power supply pins 10. The light emitting chip 30 is electrically connected to the bias signal pins 10 and the chip power supply pins 10 via wires, and the light receiving chip 40 is electrically connected to the bias signal pins 10 and the chip power supply pins 10 via wires.

[0052] The tube cap 20 divides the accommodating cavity into a first sub-cavity 203 and a second sub-cavity 204 that are physically isolated from each other through the partition element 202. The partition element 202 is made of an opaque material. Specifically, in some embodiments, the partition element 202 is an independent partition column or partition plate, which is located in the tube body 208 and fixedly connected to the tube body 208. In some embodiments, the partition element 202 is located in the tube body 208, fixedly connected to the tube body 208 and integrally formed. It should be noted that when the tube cap 20 and the tube base 00 are fixed, the end face of the partition element 202 away from the transparent element 201 can be fitted with the first surface 001, so that the partition element 202, the tube cap 20 and the tube base 00 together form a sealed first sub-cavity 203 and a sealed second sub-cavity 204, thereby significantly reducing the optical crosstalk of the emitted laser on the received signal caused by the stray light inside the tube cap 20, and significantly improving the signal-to-noise ratio.

[0053] Furthermore, the light detector disclosed in this application is connected to the tube cap 20 and the tube base 00 by welding. Figure 5 , Figure 5 This is a structural diagram of a welding method between the tube cap 20 and the tube base 00 provided in an embodiment of the present application. The tube cap 20 is provided with a welding ring 205. The welding ring 205 is located on the side of the tube cap 20 away from the light-transmitting element 201 and is arranged along the edge of the tube cap 20. A convex ring (not shown in the figure) is provided on the first surface 001. The convex ring surrounds the light-emitting chip 30 and the light-receiving chip 40 at the same time. In this way, the welding ring 205 can be melted so that the welding ring 205 and the convex ring are integrated to form a solid metal bonding area, thereby simultaneously sealing the first sub-cavity 203 and the second sub-cavity 204, so that an airtight cavity is formed inside the tube cap 20, thereby isolating the external water vapor. Figure 6 , Figure 6 This is a schematic diagram of another welding method for the tube cap 20 and the tube base 00 provided in an embodiment of the present application. The tube cap 20 includes a first welding ring 206 and a second welding ring 207. The first welding ring 206 is located on the side of the first cavity away from the transparent element 201, along the edge of the barrier element 202 and the edge of the tube cap 20. The second welding ring 207 is located on the side of the second cavity 204 away from the transparent element 201, along the edge of the barrier element 202 and the edge of the tube cap 20. A first raised ring and a second raised ring are provided on the first surface 001. The first raised ring surrounds the light emitting chip 30, and the second raised ring surrounds the light receiving chip 40 (not shown). With this arrangement, the first raised ring is welded to the first welding ring 206 and the second raised ring is welded to the second welding ring 207 by energy storage welding. After melting, the first welding ring 206 and the second welding ring 207 can better cover the gap between the barrier element 202 and the first surface 001, thereby preventing optical crosstalk within the tube cap 20 and ensuring the airtightness of the cavity.

[0054] It is worth mentioning that the main component of sweat is water. In the infrared region, especially in the near infrared (NIR) and mid-infrared (MIR) regions, water molecules show strong absorption peaks. Therefore, in order to improve the performance of the light detector for detecting sweat, the above-disclosed light-transmitting mirror 2011 is coated with an anti-reflection film 50. Because the absorption bands exhibited by water molecules in the near infrared (NIR) and mid-infrared (MIR) regions have strong absorption peaks near 980nm and near 1450nm, the embodiments disclosed in this application preferably use an anti-reflection film 50 with a passband center wavelength of 1450nm or an anti-reflection film 50 with a passband center wavelength of 980nm, and the light emitted by the light emitting chip 30 is also preferably a light source with a wavelength of 1450nm or a light source with a wavelength of 980nm, such as LD, VCSEL or LED light sources. Reference Figure 3 During detection, the light-transmitting element 201 is placed in contact with the surface of the object to be detected 60, such as the skin surface, and a light source near 1450nm or 980nm is used to detect the surface of the object to be detected 60, which can effectively measure the sweat content.

[0055] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A light detector for sweat detection, characterized in that: include: A tube base (00), the tube base (00) having a first surface (001) and a second surface (002) arranged opposite to each other along a first direction; A plurality of pins (10), the plurality of pins (10) passing through the first surface (001) and the second surface (002) of the tube base (00) and being insulated and connected to the tube base (00); a light emitting chip (30) and a light receiving chip (40), wherein the light emitting chip (30) and the light receiving chip (40) are arranged on the first surface (001) at intervals, and the light emitting chip (30) and the light receiving chip (40) are both electrically connected to the pin (10); A tube cap (20), the tube cap (20) being disposed on the first surface (001) and enclosing the first surface (001) to form a receiving cavity, a partition element (202) being provided in the receiving cavity, the partition element (202) extending along the first direction to separate the receiving cavity into a first sub-cavity (203) and a second sub-cavity (204) that are physically isolated from each other, a light-transmitting element (201) being provided on a side of the tube cap (20) facing away from the first surface (001), the light-transmitting element (201) allowing light to be transmitted between the first sub-cavity (203) and the outside of the tube cap (20), and allowing light to be transmitted between the second sub-cavity (204) and the outside of the tube cap (20); The first sub-cavity (203) accommodates the light emitting chip (30), and the second sub-cavity (204) accommodates the light receiving chip (40).

2. The optical detector for sweat detection according to claim 1, wherein: The tube cap (20) comprises a tube body (208) and a top wall (209) connected to each other, the top wall (209) and the first surface (001) are respectively connected to the two ends of the tube body (208) in the first direction to jointly define the accommodating cavity, and the light-transmitting element (201) comprises two light-transmitting mirrors (2011) arranged separately from each other, the two light-transmitting mirrors (2011) are both arranged on the top wall (209), one of the two light-transmitting mirrors (2011) covers the first sub-cavity (203), and the other of the two light-transmitting mirrors (2011) covers the second sub-cavity (204).

3. The optical detector for sweat detection according to claim 1, wherein: The tube cap (20) includes a tube body (208), and the light-transmitting element (201) includes a light-transmitting mirror (2011). The light-transmitting mirror (2011) and the first surface (001) are respectively connected to two ends of the tube body (208) in the first direction to jointly define the accommodating cavity.

4. The optical detector for sweat detection according to claim 1, wherein: The tube cap (20) comprises a tube body (208) and a top wall (209) connected to each other, the top wall (209) and the first surface (001) are respectively connected to the two ends of the tube body (208) in the first direction to jointly define the accommodating cavity, and the light-transmitting element (201) comprises a light-transmitting mirror (2011), the light-transmitting mirror (2011) is arranged on the top wall (209), a part of the light-transmitting mirror (2011) covers the first sub-cavity (203), and another part of the light-transmitting mirror (2011) covers the second sub-cavity (204).

5. The optical detector for sweat detection according to any one of claims 2 to 4, characterized in that: The light-transmitting mirror (2011) is covered with an anti-reflection film (50), and the passband center wavelength of the anti-reflection film (50) is 980 nm or 1450 nm.

6. The optical detector for sweat detection according to any one of claims 2 to 4, characterized in that: The partition element (202) and the tube body are connected to each other and are integrally formed with the tube body.

7. The optical detector for sweat detection according to claim 1, wherein: The partition element (202) is made of an opaque material.

8. The optical detector for sweat detection according to claim 6, wherein: The tube cap (20) further comprises a first welding ring (206) and a second welding ring (207); the first welding ring (206) is located on a side of the first sub-cavity (203) away from the light-transmitting element (201), and is arranged along the edge of the partition element (202) and a portion of the edge of the tube body (208); the second welding ring (207) is located on a side of the second sub-cavity (204) away from the light-transmitting element (201), and is arranged along the edge of the partition element (202) and a portion of the edge of the tube body (208); A first convex ring and a second convex ring are convexly provided on the first surface (001), the first convex ring surrounds the light emitting chip (30), and the first convex ring is welded to the first welding ring (206), the second convex ring surrounds the light receiving chip (40), and the second convex ring is welded to the second welding ring (207).

9. The optical detector for sweat detection according to claim 6, characterized in that: The tube cap (20) further comprises a welding ring (205), and the welding ring (205) is arranged along the edge of the tube body (208) on a side away from the light-transmitting element (201); A convex ring is provided on the first surface (001), the convex ring surrounds the light emitting chip (30) and the light receiving chip (40) at the same time, the convex ring is welded to the welding ring (205), and a side surface of the partition element (202) close to the first surface (001) is in contact with the first surface (001).

10. The optical detector for sweat detection according to claim 1, wherein: The tube seat (00) comprises a first supporting block (003) and a second supporting block (004); the first supporting block (003) and the second supporting block (004) are both located on the first surface (001) and fixedly connected to the first surface (001); the first supporting block (003) and the second supporting block (004) are spaced apart; the light emitting chip (30) is mounted on the first supporting block (003); and the light receiving chip (40) is mounted on the second supporting block (004).

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