Adjustable small-beam correlation optical fiber emission head

By introducing a light guide and a convex lens into the emission fiber emission head to adjust the beam size, the problem of the inability to adjust the beam size in the prior art is solved, and higher detection accuracy and longer detection distance are achieved, adapting to the needs of complex detection environments.

CN222800031UActive Publication Date: 2025-04-25SHENZHEN JIMOU SENSOR TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202421654791.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-13
Publication Date
2025-04-25
Estimated Expiration
2034-07-13

AI Technical Summary

Technical Problem

The beam size of the existing optical fiber detection transmitter head cannot be adjusted, resulting in poor detection accuracy and short detection distance, making it difficult to adapt to complex detection environments.

Method used

A counter-emission fiber emission head with adjustable small beams is designed. By setting a light guide and a convex lens in the tube shell of the emission head, the light reflection law and optical reflective film are used to adjust the beam size and improve the detection accuracy and distance.

Benefits of technology

It achieves higher detection accuracy and longer detection distance, can adapt to more complex detection environments, and adapt to different usage scenarios by adjusting the beam size.

✦ Generated by Eureka AI based on patent content.

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    Figure CN222800031U_ABST
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Abstract

The utility model discloses an adjustable small-light-beam correlation optical fiber emitting head, and relates to an improvement of an optical fiber sensor detection device, in particular to an improvement of a correlation optical fiber emitting head. The light emitting head comprises an emitting head tube shell, an assembly connecting tube, a light emitting optical fiber, a fixing nut, an installation nut, a light guide body and a convex lens. A light convex lens is arranged in a light through hole in the left side of the emitting head tube shell, an inner threaded hole is formed in the right side of the emitting head tube shell, an assembly connecting tube is screwed in the inner threaded hole, a light guide body is arranged on the left portion of an inner hole of the assembly connecting tube, a light-emitting optical fiber is arranged on the right portion of the assembly connecting tube, and a fixing nut is connected to the outer circle face of the right side of the assembly connecting tube in a sleeving mode. The device has a longer detection distance and higher detection precision, and can adapt to a more complex detection environment.
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Description

Technical Field

[0001] The utility model relates to an improvement of an optical fiber sensor detection device, in particular to an improvement of a counter-radiation optical fiber transmitting head. Background Art

[0002] The through-beam fiber optic detection head is a common detection device, which is widely used due to its long detection distance, good detection stability and small installation volume.

[0003] The current through-beam fiber optic detection transmitter emits a large light beam and cannot adjust the light beam size as needed, resulting in poor detection accuracy, short detection distance, and difficulty in adapting to complex detection environments. Utility Model Content

[0004] The purpose of the utility model is to provide an adjustable small light beam optical fiber transmitter head in view of the defects and shortcomings of the prior art, which has a longer detection distance and higher detection accuracy and can adapt to more complex detection environments.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: it comprises a transmitter tube shell 1, an assembly connecting tube 2, a light-emitting optical fiber 3, a fixing nut 4, an installation nut 5, a light guide 6 、 Convex lens 7; a convex lens 7 is arranged in the light hole 11 on the left side of the transmitter tube shell 1, an internal threaded hole 12 is arranged on the right side of the transmitter tube shell 1, an assembly connection tube 2 is screwed into the internal threaded hole 12, a light guide 6 is arranged on the left part of the inner hole of the assembly connection tube 2, a light emitting optical fiber 3 is arranged on the right part of the assembly connection tube 2, and a fixing nut 4 is sleeved on the outer cylindrical surface on the right side of the assembly connection tube 2. The fixing nut 4 is used to fix the assembly connection tube 2 to prevent it from loosening.

[0006] The outer circumferential surface of the assembly connecting tube 2 is an external thread structure, the inner hole on the left side of the assembly connecting tube 2 is the mounting hole 21 of the light guide 6, and the right side of the assembly connecting tube 2 is a large circular hole 22 for mounting the optical fiber.

[0007] The left end of the light guide 6 is a cylinder 61, and the right end is a cone 62. The outer periphery of the light guide 6 except the two end faces is plated with an optical reflective film to increase the reflectivity of light transmission and reduce the light attenuation rate.

[0008] The working principle is: because of the law of reflection of light, the reflection angle is equal to the incident angle, so as long as the angle of the cone slope of the light guide 6 is set, the light emitted by the luminous optical fiber 3 will be transmitted through the large end face of the right side of the cone 62 of the right part of the light guide 6, and will be concentrated to the small end face on the left side, and then pass through the small cylinder 61 on the left side of the light guide 6. The small cylinder 61 will make the collected light beams tend to be parallel and make the divergence of the light beams smaller before being emitted. Because the outer periphery of the light guide 6 except for the two end faces is coated with an optical reflective film, the light conduction reflection attenuation is not large, so although the light output area is greatly reduced, the light output intensity is not attenuated much, and the light beam passes again. The convex lens 7 in the left inner hole 11 of the transmitter head shell 1 is focused and emitted. Since the size of the light beam formed by focusing the light through the convex lens is positively correlated with the light emitting area of ​​the light source, the light intensity of the light emitted by the convex lens 7 is not greatly attenuated while the light beam is greatly reduced, thereby improving the detection accuracy. In addition, the strong light and small light beam can be transmitted over a longer distance, thereby greatly improving the detection distance. By adjusting the position of the assembly connecting tube 2 in the transmitter head shell 1 to change the distance between the light emitting surface of the light guide 2 and the convex lens 7, the size of the light beam can be adjusted as needed, which can be suitable for more usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0011] Figure 2 It is the internal structure diagram of the utility model;

[0012] Figure 3 It is a cross-sectional view of the transmitter tube shell 1 in the utility model;

[0013] Figure 4 It is a cross-sectional view of the assembly connecting pipe 2 in the utility model;

[0014] Figure 5 It is a structural diagram of the light guide 6 in the utility model.

[0015] Description of reference numerals: transmitter housing 1, assembly connection tube 2, light-emitting optical fiber 3, fixing nut 4, mounting nut 5, light guide 6 、 Convex lens 7, left light-through hole 11, internal thread hole 12, mounting hole 21, large circular hole 22, cylinder 61, cone 62. DETAILED DESCRIPTION

[0016] See also Figure 1-5 As shown, the technical solution adopted in this specific embodiment is: it includes a transmitter tube shell 1, an assembly connection tube 2, a light-emitting optical fiber 3, a fixing nut 4, a mounting nut 5, a light guide 6, and a convex lens 7; a light convex lens 7 is arranged in the light hole 11 on the left side of the transmitter tube shell 1, an internal threaded hole 12 is arranged on the right side of the transmitter tube shell 1, and an assembly connection tube 2 is screwed into the internal threaded hole 12, a light guide 6 is arranged on the left part of the inner hole of the assembly connection tube 2, a light-emitting optical fiber 3 is arranged on the right part of the assembly connection tube 2, and a fixing nut 4 is sleeved on the outer cylindrical surface on the right side of the assembly connection tube 2. The fixing nut 4 is used to fix the assembly connection tube 2 to prevent it from loosening. The outer cylindrical surface of the assembly connection tube 2 is an external thread structure, the inner hole on the left side of the assembly connection tube 2 is the mounting hole 21 of the light guide 6, and the right side of the assembly connection tube 2 is a large circular hole 22 for mounting the optical fiber. The left end of the light guide 6 is a cylinder 61, and the right end is a cone 62. Except for the two end faces, the outer periphery of the light guide 6 is plated with an optical reflective film. Optical reflective film is applied to increase the reflectivity of light transmission and reduce the light attenuation rate.

[0017] Because of the law of reflection of light, the reflection angle is equal to the incident angle, so as long as the angle of the cone slope of the light guide 6 is set, the light emitted by the light-emitting optical fiber 3 will be transmitted through the large end face of the right side of the cone 62 of the right part of the light guide 6, and will be concentrated to the small end face on the left side, and then pass through the small cylinder 61 on the left side of the light guide 6. The small cylinder 61 will make the collected light beams tend to be parallel and make the divergence of the light beams smaller before emitting. Because the outer periphery of the light guide 6 except for the two end faces is coated with an optical reflective film, the light transmission reflection attenuation is not large, so although the light output area is greatly reduced, the light output intensity is not attenuated much, and the light beam passes through the transmitting head again. The convex lens 7 in the inner hole 11 on the left side of the tube shell 1 is focused and emitted. Since the size of the light beam formed by the convex lens is positively correlated with the light emitting area of ​​the light source, the light intensity of the light emitted by the convex lens 7 is not greatly attenuated while the light beam is greatly reduced, thereby improving the detection accuracy. In addition, the strong light and small light beam can propagate a longer distance, thereby greatly improving the detection distance. By adjusting the position of the assembly connecting tube 2 in the transmitter tube shell 1 to change the distance between the light emitting surface of the light guide 2 and the convex lens 7, the size of the light beam can be adjusted as needed, which can be suitable for more usage scenarios.

[0018] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. An adjustable small beam optical fiber transmitter, comprising a transmitter housing (1), an assembly connection tube (2), a light-emitting optical fiber (3), a fixing nut (4), a mounting nut (5), and a light guide (6) 、 Convex lens (7), characterized in that: A convex lens (7) is arranged in the light hole (11) on the left side of the transmitter tube shell (1); an internal threaded hole (12) is arranged on the right side of the transmitter tube shell (1); an assembly connection tube (2) is screwed into the internal threaded hole (12); a light guide (6) is arranged on the left side of the inner hole of the assembly connection tube (2); a light emitting optical fiber (3) is arranged on the right side of the assembly connection tube (2); and a fixing nut (4) is sleeved on the outer cylindrical surface of the right side of the assembly connection tube (2).

2. The adjustable small beam optical fiber transmitter according to claim 1, characterized in that: The outer circumferential surface of the assembly connecting tube (2) is an external thread structure, the inner hole on the left side of the assembly connecting tube (2) is a mounting hole (21) for the light guide (6), and the right side of the assembly connecting tube (2) is a large circular hole (22) for mounting the optical fiber.

3. The adjustable small beam optical fiber transmitter according to claim 1, characterized in that: The left end of the light guide (6) is a cylinder (61), and the right end is a cone (62). Except for the two end faces, the outer periphery of the light guide (6) is coated with an optical reflective film.