CN215599400U - Optical fiber member and optical fiber sensor - Google Patents
Optical fiber member and optical fiber sensor Download PDFInfo
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- CN215599400U CN215599400U CN202121409197.6U CN202121409197U CN215599400U CN 215599400 U CN215599400 U CN 215599400U CN 202121409197 U CN202121409197 U CN 202121409197U CN 215599400 U CN215599400 U CN 215599400U
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Abstract
Provided are an optical fiber member capable of improving the accuracy of the tip surface of a joint component, and an optical fiber sensor provided with the optical fiber member. The optical fiber member (11) is provided with: plastic fibers (13); a glass fiber (14) that is formed to have a smaller diameter than the plastic fiber (13), and that has a proximal end portion that is disposed opposite to and optically connected to the distal end portion of the plastic fiber (13); and a joint component (15) provided with a large-diameter insertion portion (15a) into which the tip end side of the plastic fiber (13) is inserted, on the proximal end side, and a small-diameter insertion portion (15b) into which the proximal end side of the glass fiber (14) is inserted, on the distal end side. The outer surface of the glass fiber (14) is covered with a cylindrical sleeve (18), the sleeve (18) is inserted into and bonded to the small-diameter insertion section (15b), and a tapered recess is provided around the small-diameter insertion section in the distal end surface of the joint component. According to the optical fiber member and the optical fiber sensor of the present disclosure, the tip end surface of the joint component can be highly accurate.
Description
Technical Field
The present invention relates to an optical fiber member and an optical fiber sensor.
Background
Conventionally, as an optical fiber member connected to a main body of an optical fiber sensor, there is an optical fiber member including a plastic fiber and a glass fiber having a base end portion disposed to face a tip end portion of the plastic fiber and optically connected thereto (see, for example, patent document 1). The optical fiber member includes a joint component that holds a plastic fiber and a glass fiber in a connected state. The joint component is provided at a proximal end side thereof with a large diameter insertion portion into which a distal end side of the plastic fiber is inserted, and at a distal end side thereof with a small diameter insertion portion into which a proximal end side of the glass fiber is inserted. In such an optical fiber member, by using plastic fibers at the proximal end side, flexibility and low cost can be ensured as compared with the case of using glass fibers as a whole, and by using glass fibers at the distal end side, high heat resistance and chemical resistance in the sensing region can be ensured. Further, in order to detect minute objects such as chip components with high accuracy, the detection surface size needs to be reduced, but the detection surface size can be reduced by using glass fiber.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 1-77602
SUMMERY OF THE UTILITY MODEL
Problem to be solved by utility model
However, in the optical fiber member described above, in a structure in which the outer surface of the glass fiber is covered with the cylindrical ferrule and the ferrule is inserted into and bonded to the small-diameter insertion portion, there is a possibility that the adhesive leaks around the small-diameter insertion portion in the distal end surface of the joint component. In this case, the larger the pipe diameter of the sleeve, the more the leaked adhesive can be sufficiently wiped off before curing, but the thinner the pipe diameter of the sleeve, the more difficult the wiping operation becomes. That is, the adhesive may protrude from the distal end surface of the joint component and solidify, and the accuracy of the distal end surface of the joint component may be lowered. When an extremely thin optical fiber is to be realized, the tube diameter of the ferrule becomes small, and it becomes difficult to fix the ferrule. In this case, for example, when the distal end surface of the joint component is brought into contact with the contact surface of the fixing member to be positioned and held, the joint component is displaced from the fixing member, and further, the glass fiber is displaced, which causes a reduction in detection accuracy of the optical fiber sensor.
The present invention has been made to solve the above-described problems, and an object thereof is to provide an optical fiber member and an optical fiber sensor that can improve the accuracy of the distal end surface of a joint component.
Means for solving the problems
An optical fiber member for solving the above problems includes: a plastic fiber; a glass fiber having a smaller diameter than the plastic fiber, a base end portion of the glass fiber being disposed opposite to a tip end portion of the plastic fiber and optically connected thereto; and a joint component provided with a large-diameter insertion portion into which a tip end side of the plastic fiber is inserted on a base end side and a small-diameter insertion portion into which a base end side of the glass fiber is inserted on a tip end side, an outer surface of the glass fiber being covered with a cylindrical sleeve which is inserted and bonded to the small-diameter insertion portion, a recess being provided around the small-diameter insertion portion in a tip end surface of the joint component.
According to this configuration, since the recess is provided around the small-diameter insertion portion in the distal end surface of the joint component, when the ferrule covering the outer surface of the glass fiber is inserted and bonded into the small-diameter insertion portion, even if the adhesive leaks from the small-diameter insertion portion, the adhesive is contained in the recess. Therefore, the adhesive can be prevented from protruding from the distal end surface of the joint component, and the distal end surface of the joint component can be made highly accurate. As a result, for example, when the distal end surface of the joint component is positioned and held in contact with the contact surface of the fixing member, the positional displacement of the joint component with respect to the fixing member can be suppressed.
In the above optical fiber member, the concave portion is preferably a tapered concave portion having a diameter that decreases toward the bottom.
According to this configuration, since the recess is a tapered recess having a diameter that decreases as the recess goes toward the bottom, molding is easier than in the case of a recess having a fixed depth of the bottom, for example.
In the above optical fiber member, the glass fiber is preferably a multicomponent glass fiber.
According to this configuration, since the glass fiber is a multicomponent glass fiber, it can be made less expensive than a glass fiber made of, for example, only quartz.
In the optical fiber member, the diameter of the glass fiber is preferably half or less of the diameter of the plastic fiber.
According to this configuration, since the glass fiber has a diameter equal to or smaller than half of the diameter of the plastic fiber, the projected light can be made significantly thinner.
An optical fiber sensor that solves the above problems includes the optical fiber member as a light-emitting-side optical fiber member, and a light-receiving-side optical fiber member disposed so as to face a distal end of the glass fiber of the light-emitting-side optical fiber member, wherein the glass fiber of the light-emitting-side optical fiber member is formed to have a smaller diameter than an optical fiber of the light-receiving-side optical fiber member.
According to this configuration, since the glass fiber of the light-emitting-side optical fiber member is formed to have a smaller diameter than the optical fiber of the light-receiving-side optical fiber member, it is possible to provide a configuration in which the projected light is made thin and is completely shielded when detecting a minute sensing object, for example, and it is possible to facilitate the alignment of the light-emitting-side optical fiber member and the light-receiving-side optical fiber member. That is, for example, when both the optical fiber of the light-emitting-side optical fiber member and the optical fiber of the light-receiving-side optical fiber member have a small diameter, the projected light can be made thin and can be completely shielded from light when detecting a minute sensing object, but high accuracy is required for positioning the optical fibers with respect to each other. In contrast, in the above configuration, since the diameter of the optical fiber of the light receiving side optical fiber member is large, the range in which light can be received is wide, and alignment with high accuracy is not necessary, and alignment becomes easy.
Effect of the utility model
According to the optical fiber member and the optical fiber sensor of the present disclosure, the tip end surface of the joint component can be highly accurate.
Drawings
Fig. 1 is a schematic diagram for explaining an optical fiber sensor in one embodiment.
Fig. 2 is a cross-sectional view of a light-projecting-side optical fiber member and a fixing member in one embodiment.
Detailed Description
An embodiment of the optical fiber sensor will be described below with reference to fig. 1 and 2.
As shown in fig. 1, the optical fiber sensor 10 includes a light-emitting-side optical fiber member 11 and a light-receiving-side optical fiber member 12 as optical fiber members. The light-projecting-side optical fiber member 11 and the light-receiving-side optical fiber member 12 are connected to an optical fiber sensor main body, not shown, having a light projecting element and a light receiving element.
As shown in fig. 2, the light-projecting-side optical fiber member 11 includes a plastic fiber 13, a glass fiber 14, and a joint component 15.
To be more specific, the plastic fiber 13 is an optical fiber made of plastic, and in the present embodiment, is a plastic fiber made of acrylic resin. The outer surface of the plastic fiber 13 is covered with a film 16 made of polyethylene except for a part on the tip side. In the plastic fiber 13 of the present embodiment, the distal end side exposed from the coating 16 is inserted into a substantially cylindrical distal end member 17 and covered with the distal end member 17. Specifically, the distal end member 17 includes a cylindrical portion 17a at the center in the axial direction, a distal end cylindrical portion 17b extending from the distal end of the cylindrical portion 17a, and a proximal end cylindrical portion 17c extending from the proximal end of the cylindrical portion 17 a. The distal end cylindrical portion 17b has an outer diameter smaller than the outer diameter of the cylindrical portion 17a, and the proximal end cylindrical portion 17c has an inner diameter larger than the inner diameter of the cylindrical portion 17 a. The distal end part 17 is provided such that the cylinder portion 17a and the distal end cylinder portion 17b cover the exposed distal end side of the plastic fiber 13, and such that the proximal end cylinder portion 17c covers the distal end side of the film 16.
The glass fiber 14 is an optical fiber made of a glass material, and in the present embodiment, is a multicomponent glass fiber made of multicomponent glass. The glass fiber 14 is formed to have a smaller diameter than the plastic fiber 13, and the base end portion of the glass fiber 14 is disposed to face the tip end portion of the plastic fiber 13 and optically connected to the plastic fiber 13. In the present embodiment, the diameter of the glass fiber 14 is 0.05mm, and the diameter of the plastic fiber 13 is 0.5 mm. That is, the glass fiber 14 is formed to have an ultra-fine diameter compared to the plastic fiber 13. In the present embodiment, the fineness that cannot be achieved by the plastic fiber is achieved by the glass fiber. The outer surface of the glass fiber 14 is covered with a cylindrical sleeve 18 made of stainless steel.
The joint member 15 holds the plastic fibers 13 and the glass fibers 14 in a state where the plastic fibers 13 and the glass fibers 14 are connected. Specifically, a large diameter insertion portion 15a into which the tip end side of the plastic fiber 13 is inserted is provided on the base end side of the joint component 15. A small-diameter insertion portion 15b into which the base end side of the glass fiber 14 is inserted is provided on the tip end side of the joint component 15. The large-diameter insertion portion 15a is formed to have a diameter into which the tip end piece 17 can be inserted. The tip end piece 17 is inserted into the large diameter insertion portion 15a, and the outer periphery of the tip end piece 17 is bonded to the large diameter insertion portion 15 a. The small-diameter insertion portion 15b is formed to have a diameter into which the sleeve 18 can be inserted. The sleeve 18 is inserted into the small-diameter insertion portion 15b, and the outer periphery of the sleeve 18 is bonded to the small-diameter insertion portion 15 b.
A tapered recess 15c is provided as a recess around the small-diameter insertion portion 15b on the distal end surface of the joint element 15. The tapered recess 15c is formed so as to have a smaller diameter toward the bottom, in other words, so as to have a deeper depth toward the small diameter insertion portion 15b at the center when viewed from the axial direction. The tapered recess 15c is provided such that: when the sleeve 18 covering the outer surface of the glass fiber 14 is inserted into and bonded to the small-diameter insertion portion 15b, even if the adhesive 19 leaks from the small-diameter insertion portion 15b, the adhesive 19 is contained in the tapered recess portion 15 c.
As shown in fig. 1, the light-projecting-side optical fiber member 11 is disposed in the vicinity of the conveying member 22, and the conveying member 22 conveys, for example, the electric component chip 21 as a sensing target. The light-projecting-side optical fiber member 11 is fixed to the fixing member 23, and the fixing member 23 is disposed in the vicinity of the conveying member 22. The fixing member 23 has: a housing recess 23a for housing the joint component 15; and a housing hole 23b extending from the bottom of the housing recess 23a toward the distal end side and housing the glass fiber 14 and the ferrule 18 protruding from the joint component 15. The light-projecting-side optical fiber member 11 is positioned and fixed to the fixing member 23 by the contact surface 23c, which is the bottom of the housing recess 23a of the fixing member 23, being contacted by the distal end surface of the joint component 15. The length of the glass fiber 14 of the light-projecting-side optical fiber member 11 is set to: in the state of being fixed to the fixing member 23, the tip end surface of the glass fiber 14 coincides with the tip end surface of the fixing member 23.
The light-receiving side optical fiber member 12 includes a plastic fiber 31 and a component 32. The light receiving side optical fiber member 12 is a general optical fiber member, unlike the light projecting side optical fiber member 11 described above, and includes only the plastic fiber 31 as an optical fiber and does not include the glass fiber 14. The tip end side of the plastic fiber 31 is held by the part 32. The tip end of the plastic fiber 31 protrudes from the element 32.
The light-receiving-side optical fiber member 12 is fixed to a fixing member 33 disposed to face the fixing member 23, and is disposed so that the plastic fiber 31 faces the distal end of the glass fiber 14 of the light-emitting-side optical fiber member 11. That is, the light-receiving-side optical fiber member 12 is arranged such that: whether or not the electrical component chip 21 is present between the light-emitting-side optical fiber member 11 and the light-receiving-side optical fiber member 12 can be detected based on whether or not the plastic fiber 31 receives the light projected from the glass fiber 14. The glass fiber 14 of the light-emitting-side fiber member 11 is formed to have a smaller diameter than the plastic fiber 31 of the light-receiving-side fiber member 12. The light-receiving-side optical fiber member 12 is made of plastic fibers 31, but may not be plastic fibers.
Next, an operation of the optical fiber sensor 10 configured as described above will be described.
When the light emitting element of the optical fiber sensor main body, not shown, emits light, a thin light having a diameter corresponding to the diameter of the glass fiber 14 is projected from the tip of the glass fiber 14 of the light-emitting-side optical fiber member 11. When the projected light reaches the plastic fiber 31 of the light-receiving-side optical fiber member 12, the light-receiving element of the optical fiber sensor main body detects this, and it is detected that the electrical component chip 21 is not present between the glass fiber 14 and the plastic fiber 31. When the projected light does not reach the plastic fiber 31 of the light-receiving-side optical fiber member 12, the presence of the electrical component chip 21 between the glass fiber 14 and the plastic fiber 31 is detected by the light-receiving element of the optical fiber sensor main body.
Further, in the light-projecting-side optical fiber member 11, the plastic fiber 13 is used on the proximal end side, whereby flexibility and low cost can be ensured as compared with the case of using the glass fiber 14 as a whole, and the glass fiber 14 is used on the distal end side, whereby high heat resistance and chemical resistance can be ensured in the sensor region. Further, by using the glass fiber 14 on the distal end side, it is possible to realize the miniaturization that is difficult in the plastic fiber 13, and to make the projected light fine, and to perform high-precision detection of a minute sensing object.
Next, the effects of the above embodiment are described below.
(1) Since the tapered recess 15c is provided around the small-diameter insertion portion 15b in the distal end surface of the joint component 15, when the sleeve 18 covering the outer surface of the glass fiber 14 is inserted into and bonded to the small-diameter insertion portion 15b, even if the adhesive 19 leaks from the small-diameter insertion portion 15b, the adhesive 19 is contained in the tapered recess 15 c. Therefore, the adhesive 19 can be prevented from protruding from the distal end surface of the joint component 15, and the distal end surface of the joint component 15 can be made highly accurate. As a result, for example, when the distal end surface of the joint element 15 is positioned and held in contact with the contact surface 23c of the fixing member 23, the positional displacement of the joint element 15 with respect to the fixing member 23 can be suppressed, and the detection accuracy of the optical fiber sensor 10 can be suppressed from being lowered.
(2) Since the recess provided on the distal end surface of the joint element 15 is a tapered recess 15c having a diameter that decreases toward the bottom, molding is easier than, for example, a recess having a constant depth at the bottom.
(3) Since the glass fiber 14 is a multicomponent glass fiber, it can be made inexpensive as compared with, for example, a glass fiber made of only quartz.
(4) Since the diameter of the glass fiber 14 is not more than half of the diameter of the plastic fiber 13, the projected light can be made significantly thinner.
(5) Since the glass fiber 14 of the light-emitting-side optical fiber member 11 is formed to have a smaller diameter than the plastic fiber 31 of the light-receiving-side optical fiber member 12, it is possible to make the projected light thin and to make the light completely shielded when detecting a minute sensing object, for example, and to facilitate the alignment of the light-emitting-side optical fiber member 11 and the light-receiving-side optical fiber member 12. That is, for example, when both the optical fiber of the light-emitting-side optical fiber member 11 and the optical fiber of the light-receiving-side optical fiber member 12 have a small diameter, the projected light to be detected can be thinned and the light can be completely blocked when detecting a minute sensing object. In contrast, in the above configuration, since the diameter of the plastic fiber 31 of the light-receiving-side optical fiber member 12 is large, the range in which light can be received is wide, and alignment with high accuracy is not necessary, and alignment becomes easy.
This embodiment can be modified as follows. The present embodiment and the following modifications can be combined and implemented within a range not technically contradictory to each other.
In the above embodiment, the recess provided on the distal end surface of the joint component 15 may be a tapered recess 15c having a smaller diameter toward the bottom, but the present invention is not limited thereto, and for example, a recess having a constant depth of the bottom may be provided. The shape of the base is not limited to a tapered shape, and may be a stepped shape or a semi-tapered shape in which the cross-sectional shape of the base is curved.
In the above embodiment, the glass fiber 14 is a multicomponent glass fiber, but is not limited thereto, and may be a glass fiber made of only quartz, for example.
In the above embodiment, the plastic fiber 13 is made of acrylic resin, but is not limited thereto, and a plastic fiber made of plastic other than acrylic resin may be used.
In the above embodiment, the plastic fiber 31 as the optical fiber of the light receiving side optical fiber member 12 has a larger diameter than the glass fiber 14 as the optical fiber of the light projecting side optical fiber member 11, but the present invention is not limited thereto, and for example, the optical fiber of the light receiving side optical fiber member 12 and the optical fiber of the light projecting side optical fiber member 11 may have the same diameter. For example, as the light receiving side optical fiber member 12, a member having the same product number as that of the light projecting side optical fiber member 11 may be used.
In the above embodiment, the optical fiber sensor 10 is embodied in which the distal end of the glass fiber 14 of the light-emitting-side optical fiber member 11 and the plastic fiber 31 of the light-receiving-side optical fiber member 12 are disposed to face each other, but the present invention is not limited to this, and may be embodied in that the light-emitting-side optical fiber member 11 is used in an optical fiber sensor that detects a sensing target by reflection, for example.
In the above embodiment, the diameter of the glass fiber 14 is 0.05mm, but the diameter is not limited thereto, and may be changed to another diameter such as 0.07mm or 0.03 mm. The diameter of the glass fiber 14 is not more than half, preferably not more than half, of the fineness of the diameter of the plastic fiber 13. The diameter of the glass fiber 14 may be larger than half the diameter of the plastic fiber 13.
Technical ideas that can be grasped from the above-described embodiments and modifications are described.
(A) An optical fiber sensor includes a light-emitting-side optical fiber member and a light-receiving-side optical fiber member that are arranged so that distal ends of the optical fibers face each other, and the optical fiber of the light-emitting-side optical fiber member is formed to have a smaller diameter than the optical fiber of the light-receiving-side optical fiber member.
According to this configuration, since the optical fiber of the light-emitting-side optical fiber member is formed to have a smaller diameter than the optical fiber of the light-receiving-side optical fiber member, it is possible to make the projected light thin and to make the projected light completely shielded when detecting a minute sensing object, for example, and it is possible to facilitate the alignment of the light-emitting-side optical fiber member and the light-receiving-side optical fiber member. That is, for example, when both the optical fiber of the light-emitting-side optical fiber member and the optical fiber of the light-receiving-side optical fiber member have a small diameter, the projected light can be made thin and can be completely shielded from light when detecting a minute sensing object, but high accuracy is required for positioning the optical fibers with respect to each other. In contrast, in the above configuration, since the optical fiber of the light receiving side optical fiber member has a large diameter, the range in which light can be received is wide, and alignment with high accuracy is not necessary, and alignment becomes easy.
(B) An optical fiber member (11) is provided with:
plastic fibers (13, 31);
a glass fiber (14) having a diameter smaller than the diameter of the plastic fiber; and
a joint component (15) for holding the plastic fiber and the glass fiber in a state in which a tip end of the plastic fiber is disposed opposite to a base end of the glass fiber and optically connected to each other, the joint component including a large diameter insertion portion (15a) having a 1 st opening on a base end surface of the joint component and a small diameter insertion portion (15b) having a 2 nd opening on a tip end surface of the joint component and communicating with the large diameter insertion portion, the tip end of the plastic fiber being inserted into the large diameter insertion portion, and the base end of the glass fiber being inserted into the small diameter insertion portion,
the outer surface of the glass fiber is covered by a cylindrical sleeve (18) which is bonded to the inner peripheral surface of the small-diameter insertion part,
a recess is formed around the 2 nd opening of the small-diameter insertion portion in the distal end surface of the joint component.
Reference examples are described below.
The light-emitting-side optical fiber member 11 of the above-described embodiment is a special optical fiber member including the plastic fiber 13 and the glass fiber 14, but regardless of the above-described configuration, the effect of the technical idea described above can be obtained by forming the optical fiber of the light-emitting-side optical fiber member to have a smaller diameter than the optical fiber of the light-receiving-side optical fiber member.
For example, even when the optical fiber at the tip of the light-emitting-side optical fiber member 11 is made of a plastic fiber and has a smaller diameter than the optical fiber of the light-receiving-side optical fiber member, the projected light can be made thin and can be completely shielded when detecting a minute sensing object, and the alignment between the light-emitting-side optical fiber member and the light-receiving-side optical fiber member can be facilitated.
Description of the symbols
10: an optical fiber sensor; 11: a light-projecting-side optical fiber member (optical fiber member); 12: a light receiving side optical fiber member; 13. 31: plastic fibers (optical fibers); 14: glass fibers (optical fibers); 15: a joint part; 15 a: a large-diameter insertion portion; 15 b: a small diameter insertion portion; 15 c: a tapered recess (concavity); 16: a skin membrane; 17: a tip part; 17 a: a barrel portion; 17 b: a top end cylinder part; 17 c: a base end cylinder part; 18: a sleeve; 19: an adhesive; 21: an electrical component chip; 22: a conveying member; 23. 33: a fixing member; 23 a: a receiving recess; 23 b: a receiving hole; 23 c: an abutting surface; 32: and (4) parts.
Claims (5)
1. An optical fiber member, comprising:
a plastic fiber;
a glass fiber having a smaller diameter than the plastic fiber, a base end portion of the glass fiber being disposed opposite to a tip end portion of the plastic fiber and optically connected thereto; and
a joint component having a large-diameter insertion portion on a proximal end side into which a distal end side of the plastic fiber is inserted, and a small-diameter insertion portion on a distal end side into which a proximal end side of the glass fiber is inserted,
the outer surface of the glass fiber is covered with a cylindrical sleeve which is inserted into and bonded to the small-diameter insertion portion,
a recess is provided around the small-diameter insertion portion in the distal end surface of the joint component.
2. The fiber optic component of claim 1,
the recess is a tapered recess having a diameter that decreases toward the bottom.
3. The fiber optic component of claim 1 or claim 2,
the glass fibers are multicomponent glass fibers.
4. The fiber optic component of claim 1 or claim 2,
the diameter of the glass fiber is less than half of the diameter of the plastic fiber.
5. An optical fiber sensor comprising the optical fiber member according to claim 1 or claim 2 as a light-projection-side optical fiber member,
and a light receiving side fiber member disposed so as to face a tip end of the glass fiber of the light projecting side fiber member,
the glass fiber of the light-emitting-side optical fiber member is formed to have a smaller diameter than the optical fiber of the light-receiving-side optical fiber member.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-115584 | 2020-07-03 | ||
| JP2020115584A JP2022013191A (en) | 2020-07-03 | 2020-07-03 | Optical fiber member and fiber sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215599400U true CN215599400U (en) | 2022-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121409197.6U Active CN215599400U (en) | 2020-07-03 | 2021-06-23 | Optical fiber member and optical fiber sensor |
Country Status (3)
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| JP (1) | JP2022013191A (en) |
| CN (1) | CN215599400U (en) |
| TW (1) | TWI807351B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5761356A (en) * | 1996-08-19 | 1998-06-02 | Cogent Light Technologies, Inc. | Apparatus and method for coupling high intensity light into low temperature optical fiber |
| JP2000206359A (en) * | 1999-01-18 | 2000-07-28 | Alps Electric Co Ltd | Optical fiber coupling device |
| US6726373B2 (en) * | 2000-05-05 | 2004-04-27 | Hubbell Incorporated | Strain relief connector for fiber optic cable and method of making same |
| US20080177257A1 (en) * | 2007-01-23 | 2008-07-24 | Smith Ronald T | Thermally robust illumination probe tip |
| JP6963955B2 (en) * | 2017-09-27 | 2021-11-10 | 株式会社キーエンス | Fiber sensor, light receiving fiber and diffuser |
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2020
- 2020-07-03 JP JP2020115584A patent/JP2022013191A/en active Pending
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2021
- 2021-06-23 CN CN202121409197.6U patent/CN215599400U/en active Active
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| JP2022013191A (en) | 2022-01-18 |
| TWI807351B (en) | 2023-07-01 |
| TW202202885A (en) | 2022-01-16 |
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