CN210605100U

CN210605100U - Coupling device of LED lamp source and optical fiber

Info

Publication number: CN210605100U
Application number: CN201921537268.3U
Authority: CN
Inventors: 易佑春; 林江
Original assignee: Chengdu Xinsanke Instrument Co ltd
Current assignee: Chengdu Xinsanke Instrument Co ltd
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2020-05-22
Anticipated expiration: 2029-09-16

Abstract

The utility model discloses a coupling device of LED lamp source and optic fibre, including optic fibre coupling device, LED lamp source and optic fibre, inside lamp source holding chamber and the fibre channel of being equipped with of optic fibre coupling device, the lamp source holding intracavity is arranged in to the LED lamp source, optic fibre passes through fibre channel, makes the optical fiber terminal surface closely laminate with the luminous surface in LED lamp source, has guaranteed the maximum luminous flux that the LED lamp source can get into optic fibre to make ordinary LED lamp source and optic fibre can the coupling of maximum efficiency. The utility model discloses a coupling device of LED lamp source and optic fibre closely laminates through fiber end face and LED lamp source surface, has guaranteed that the LED lamp source can get into the maximum luminous flux of optic fibre to make ordinary LED lamp source and optic fibre can the coupling of maximum efficiency.

Description

Coupling device of LED lamp source and optical fiber

Technical Field

The utility model relates to an optical fiber coupling technical field, concretely relates to coupling device of LED lamp source and optic fibre.

Background

At present, most of optical fiber coupling devices adopt a laser LED light source to be coupled with an optical fiber, and in order to ensure the maximum coupling efficiency of the common LED light source and the optical fiber coupling, a very complicated lens combination device is usually added, so that the coupling device of the common LED light source and the optical fiber needs to be simplified.

The existing common LED lamp source and optical fiber coupling usually adopt a long-tapered optical fiber coupling mode, namely, a long-tapered optical fiber channel is arranged, so that the light emitted by the common LED lamp source irradiates on an optical fiber in the optical fiber channel for coupling, however, the light divergence angle of the common LED lamp source is large, the half-wave bandwidth is wide, no laser light is pure, when the common LED and the optical fiber are used for coupling, the light spot diameter is large, the light energy after penetrating through the optical fiber is seriously insufficient, the light cannot be completely coupled through the optical fiber, and a large part of light is lost, so that the coupling efficiency of the common LED and the optical fiber is very low in the mode.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: to the problem that exists, the utility model provides a coupling device of LED lamp source and optic fibre, through the closely laminating in optic fibre terminal surface and LED lamp source surface, guaranteed that the LED lamp source can get into the maximum luminous flux of optic fibre to make ordinary LED lamp source and optic fibre can the coupling of maximum efficiency.

The utility model adopts the technical scheme as follows:

the utility model discloses a coupling device of LED lamp source and optic fibre, including optical fiber coupling device, LED lamp source and optic fibre, inside lamp source holding chamber and the fibre channel of being equipped with of optical fiber coupling device, lamp source holding chamber and fibre channel intercommunication, lamp source holding intracavity is arranged in to the LED lamp source, optic fibre passes through fibre channel, makes the light emitting area in optic fibre terminal surface and LED lamp source closely laminate, has guaranteed the maximum luminous flux that the LED lamp source can get into optic fibre to make ordinary LED lamp source and optic fibre can the coupling of maximum efficiency.

Furthermore, the optical fiber channel is matched with the optical fiber in shape, structure, size and size, so that the optical fiber can just pass through the optical fiber channel, and the light of the LED lamp source cannot be irradiated on the optical fiber channel to generate diffuse reflection, so that the light loss is avoided.

Further, the shape structure and the size of the light source accommodating cavity are matched with those of the LED light source 3, and a light emitting surface is formed at the position, close to the optical fiber channel, of the LED light source.

Further, the light emitting angle of the LED lamp source is within 10 degrees of a half-wave bandwidth, and the numerical aperture of the optical fiber is 0.22-0.37.

Furthermore, the optical fiber is quartz or glass optical fiber, and the numerical aperture of the quartz or glass optical fiber is 0.22-0.37.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the utility model discloses a coupling device of LED lamp source and optic fibre closely laminates through fiber end face and LED lamp source surface, has guaranteed that the LED lamp source can get into the maximum luminous flux of optic fibre to make ordinary LED lamp source and optic fibre can the coupling of maximum efficiency.

2. The utility model discloses a coupling device of LED lamp source and optic fibre, the luminous angle of LED lamp source is within 10 degrees at half-wave bandwidth, and the numerical aperture of optic fibre is 0.22-0.37 to enable the more parallel optic fibre center of light, be favorable to the coupling of furthest's light energy.

Drawings

FIG. 1 is a schematic structural diagram of a conventional coupling device for a long tapered LED light source and an optical fiber;

fig. 2 is a schematic structural diagram of the coupling device of the LED light source and the optical fiber according to the present invention.

The labels in the figure are: 1-optical fiber, 2-optical fiber coupling device and 3-LED lamp source.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Fig. 1 is a schematic diagram of a conventional coupling device of a long tapered LED light source and an optical fiber, as shown in fig. 1, which includes an optical fiber, an LED light source, and an optical fiber coupling device, wherein the cross-sectional shape of the optical fiber coupling device is tapered, the bottom of the cross-sectional shape is smooth, the optical fiber enters from the bottom of the optical fiber coupling device, and the end face of the optical fiber is disposed in the optical fiber channel of the long taper; the LED lamp source is positioned above the optical fiber, a certain distance is reserved between the LED lamp source and the end face of the optical fiber, and an air gap exists, so that part of light emitted by the LED lamp source directly irradiates the optical fiber, the other part of light is diffused and reflected into the optical fiber through a light cone, and only part of light entering the end face of the optical fiber can be totally internally reflected in the optical fiber and transmitted, and the actual amount of light entering the optical fiber is determined by the numerical aperture of the optical fiber.

Therefore, the present embodiment is further improved based on the shortcomings of the existing coupling device of the long tapered LED light source and the optical fiber, so that the common LED light source and the optical fiber can be coupled with maximum efficiency. As shown in fig. 2, the coupling device of the LED light source and the optical fiber of the present invention includes an optical fiber coupling device 2, an LED light source 3 and an optical fiber 1, wherein the cross section of the optical fiber coupling device 2 is rectangular, so that the device can be better placed and used compared with the existing taper; the LED lamp source comprises an LED lamp source 3, an optical fiber 1 and an optical fiber coupling device 2, wherein the optical fiber coupling device 2 is internally provided with a lamp source accommodating cavity and an optical fiber channel, the LED lamp source 3 is arranged in the lamp source accommodating cavity, the end face of the optical fiber 1 is tightly attached to the light emitting surface of the LED lamp source 3 through the optical fiber channel, and compared with the existing LED lamp source, the optical fiber end face and the LED lamp source do not have air gaps, so that all light emitted by the LED lamp source directly shines into the optical fiber, and the maximum luminous flux of the LED.

As a preferred embodiment, the optical fiber channel is matched with the shape, structure and size of the optical fiber 1, so that the optical fiber 1 can just pass through the optical fiber channel, and the light of the LED light source 3 cannot be diffused and reflected on the optical fiber channel, thereby causing light loss; further, the shape structure and the size of the lamp source accommodating cavity are matched with those of the LED lamp source 3, so that light emitted by the LED lamp source 3 cannot leak into the lamp source accommodating cavity to cause loss, and the LED lamp source 3 forms a light emitting surface near the optical fiber channel, so that the light emitting surface is conveniently matched and attached to the end surface of the optical fiber 1.

As a preferred embodiment, the LED light source 3 preferably employs a small-angle light emitting diode, and is used in combination with a light conical workpiece, so that light emitted by the light emitting diode can be emitted through the light exit surface of the light conical workpiece to reach the light emitting surface, and thus the end surface of the optical fiber can be closely attached to the top end of the light emitting diode at the light emitting surface, so that all light emitted by the light emitting diode directly illuminates the optical fiber, and the maximum luminous flux of the LED can be ensured. Preferably, the light emitting angle of the LED light source 3 is within 10 degrees of the half-wave bandwidth, and the numerical aperture of the optical fiber 1 is between 0.22 and 0.37, which represents the coupling efficiency between the optical fiber and the light source, in this embodiment, the numerical aperture of the optical fiber 1 is preferably 0.37, so that the light can be more parallel to the center of the optical fiber, which is beneficial to coupling of the maximum light energy. Furthermore, the optical fiber 1 is preferably a quartz or glass optical fiber, and the numerical aperture of the quartz or glass optical fiber is 0.22-0.37.

In the above embodiment, the utility model discloses a coupling device of LED lamp source and optic fibre improves 30% than the light cone inequality (luminous flux) of the coupling device of long toper, can satisfy the needs of the luminous flux in the photoelectricity colorimeter completely.

The principles and embodiments of the present invention have been explained herein using specific examples, which are presented only to aid in understanding the methods and their core concepts. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which the product of the present invention is usually placed in when in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the coupling device or element of the LED light source and the optical fiber which is referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Claims

1. The utility model provides a coupling device of LED lamp source and optic fibre, includes optic fibre coupling device (2), LED lamp source (3) and optic fibre (1), its characterized in that, inside lamp source holding chamber and the fibre channel of being equipped with of optic fibre coupling device (2), lamp source holding chamber and fibre channel intercommunication, lamp source holding intracavity is arranged in to LED lamp source (3), optic fibre (1) passes through the fibre channel, makes the optical fiber terminal surface closely laminate with LED lamp source (3) light emitting surface.

2. The device for coupling an LED lamp source and an optical fiber according to claim 1, wherein the optical fiber channel is matched with the shape structure of the optical fiber (1).

3. The device for coupling an LED lamp source and an optical fiber according to claim 1, wherein the lamp source accommodating cavity matches with the shape structure of the LED lamp source (3), and the LED lamp source (3) forms a luminous surface near the optical fiber channel.

4. The device for coupling an LED light source and an optical fiber according to claim 1, wherein the light emitting angle of the LED light source (3) is within 10 degrees of a half-wave bandwidth, and the numerical aperture of the optical fiber (1) is 0.22-0.37.

5. The device for coupling an LED light source and an optical fiber according to claim 1, wherein the optical fiber (1) is a quartz optical fiber or a glass optical fiber.