LED optical fiber light source

Abstract

The utility model relates to the technical field of illumination, and discloses an LED optical fiber light source which comprises an LED light source, and a converging assembly, a color wheel, a shaping assembly and an optical fiber light guide bundle which are sequentially arranged along a light path, the converging assembly is used for converging divergent light of the LED light source into fine light spots; the color wheel comprises a plurality of optical filters and is used for cutting a light spot into a circle and switching to output light of different colors; the shaping assembly is used for shaping the light spots so as to be matched with the input end face of the optical fiber light transmitting bundle. Divergent light is converged into fine light spots through the converging assembly, then the light spots are cut through the color wheel, colors are switched, then the light spots are matched with the end face of the optical fiber through the shaping assembly, and the problems that in a traditional scheme, the light spots are not uniform, and multi-color output cannot be achieved are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lighting technical field especially relates to LED optical fiber light source. BACKGROUND

[0002] Optical fiber lighting system gradually replaces traditional halogen lamp and xenon lamp optical fiber light source because of long service life, high brightness, environmental protection and other advantages. The existing LED optical fiber light source mostly adopts COB (Chip-on-Board) surface light source, but its luminous surface is composed of discrete chips, which is directly coupled to the optical fiber through the lens group and is easy to form uneven light spot at the input end of the optical fiber, resulting in dark spot at the output end and affecting the uniformity of illumination.

[0003] Therefore, it is necessary to improve the prior art.

[0004] The above information is given as background information only to assist with an understanding of the present disclosure, and does not constitute admission or acknowledgement that any of the background information is applicable as prior art with respect to the present disclosure. SUMMARY

[0005] The utility model provides LED optical fiber light source to solve the prior art problem.

[0006] To achieve the above purpose, the utility model provides the following technical scheme:

[0007] An LED optical fiber light source, comprising:

[0008] LED light source, converging assembly, color wheel, shaping assembly and optical fiber light beam arranged in sequence along the light path;

[0009] The converging assembly is used for converging the divergent light of the LED light source into a fine light spot.

[0010] The color wheel comprises a plurality of optical filters and is used for cutting the light spot shape into a circle and switching the output of different color light.

[0011] The shaping assembly is used for shaping the light spot to match the input end face of the optical fiber light beam.

[0012] Optionally, the converging assembly comprises a collimating lens and a condensing lens; the collimating lens is a double-convex aspherical lens.

[0013] Optionally, in the two convex surfaces of the collimating lens, the relatively convex surface is arranged towards the condensing lens.

[0014] Optionally, the collimating lens is a large numerical aperture aspherical lens.

[0015] Optionally, the color wheel is provided with a driving motor for rotating the color wheel to switch the filter positions, and a position sensor for sensing the positions of the filters on the color wheel.

[0016] Optionally, the shaping assembly is coaxial with the converging assembly and located behind the color wheel.

[0017] Optionally, the color wheel comprises a plurality of circular filters.

[0018] Optionally, the plurality of filters comprises a white filter and at least two monochromatic filters.

[0019] The monochromatic filters are red, orange, yellow, green, cyan, blue or purple.

[0020] Optionally, the shaping assembly comprises two or more lenses.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] The LED fiber light source provided by the present application converges divergent light into fine light spots through the converging assembly, then cuts the light spots and switches colors through the color wheel, and finally matches the light spots with the fiber end face through the shaping assembly, thereby solving the problems of uneven light spots and inability to output multiple colors in the conventional scheme.

[0023] The present application has other characteristics and advantages, which will be apparent or will be described in detail in the accompanying drawings and subsequent specific embodiments incorporated herein, which together serve to explain the specific principles of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced below, and obviously, the accompanying drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other accompanying drawings can also be obtained without creative labor on the basis of these accompanying drawings.

[0025] Figure 1 The overall structure schematic diagram of the LED fiber light source provided by the present application

[0026] Figure 2 The structure schematic diagram of the color wheel in the LED fiber light source provided by the present application

[0027] Reference numerals: 100, LED light source; 200, converging assembly; 210, collimating lens; 220, condensing lens; 300, color wheel; 310, filter; 400, shaping assembly; 500, fiber light beam; S, fine light spot. DETAILED DESCRIPTION

[0028] To explain possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following will be described in detail in combination with specific embodiments listed and with reference to the drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0029] In this article, the term "embodiment" means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing at various places in the specification does not necessarily refer to the same embodiment, and does not particularly limit the independence or association between other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, each technical feature mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0030] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the art to which the present application belongs; the use of related terms herein is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0031] In the description of the present application, the phrase "and / or" is a description of the logical relationship between objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally represents that the associated objects before and after are a "or" logical relationship.

[0032] In the present application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary and secondary or order relationship between the entities or operations.

[0033] In the present application, the terms "comprise", "contain", "include", or other similar phrases used in the statements mean to encompass the non-exclusive inclusion, and the terms do not exclude the presence of additional elements in the process, method or product comprising the stated elements, so that the process, method or product comprising a series of elements can not only include those defined elements, but also include other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0034] In the present application, the terms "greater than", "less than", "exceed" and the like are understood as not including the number itself; the terms "above", "below", "within" and the like are understood as including the number itself. In addition, in the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times" and the like, unless otherwise explicitly specified.

[0035] In the description of the embodiments of the present application, the spatial-related terms used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or the drawings, and are only for the convenience of describing the specific embodiments of the present application or for the reader to understand, and do not indicate or imply that the indicated device or component must have a particular position, a particular orientation, or be constructed or operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0036] Unless otherwise explicitly specified or limited, in the description of the embodiments of the present application, the terms "mount", "connect", "connect", "fix", "set", and the like should be understood in a broad sense. For example, the "connection" can be a fixed connection, or a detachable connection, or an integral setting; it can be a mechanical connection, or an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art to which the present application belongs, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0037] At present, LED fiber light sources mostly use two lenses as a condensing lens group to directly couple the light emitted by the LED light source into the fiber light beam. High-brightness LED light sources are usually COB LED area light sources. The COB LED is not a continuous light-emitting surface, but is composed of discrete light-emitting chips. The existing direct coupling method will form an uneven light spot at the input end of the fiber light beam, causing the brightness of part of the fiber beam to be too high and the brightness of part of the fiber beam to be too low, thereby causing dark spots to appear at the output end of the fiber light beam, affecting the uniformity of illumination. On the other hand, the existing LED fiber light sources can only realize white light or monochromatic light illumination and cannot switch between multiple colors, so the versatility is low.

[0038] The utility model discloses a kind of LED fiber light sources, to improve the coupling effect of current high-power high-brightness LED fiber light source, the problem of dark spot, simultaneously can output different color light according to needs.

[0039] The scheme of the utility model is specifically introduced as follows in combination with drawings.

[0040] As shown in Figure 1 The utility model provides a kind of LED fiber light source, including LED light source 100, the converging assembly 200, color wheel 300, shaping assembly 400 and fiber light beam 500 are sequentially arranged along light path.

[0041] Among them, LED light source 100 is preferably white light COB (Chip on Board) integrated light source, with high light efficiency and uniform light emitting characteristics.

[0042] Converging assembly 200 includes collimating lens 210 and condensing lens 220.

[0043] Among them, collimating lens 210 adopts the double-convex aspheric lens of large numerical aperture (NA≥0.6), and the relatively convex side is arranged towards condensing lens 220, to maximize the receiving divergent light of LED light source 100, improve light energy utilization. The light beam collimated by collimating lens 210 is focused to form fine light spot S by condensing lens 220, and the diameter of the fine light spot S is preferably less than 5mm, and the light spot is located on the filter 310 plane of color wheel 300.

[0044] Further, color wheel 300 is arranged behind the light path of converging assembly 200, and includes a plurality of circular filters 310. Circular filter 310 is used to cut the non-circular fine light spot S into a circular shape to eliminate edge stray light.

[0045] Please refer to Figure 2 A plurality of circular filters 310 include white light filters and combinations of monochromatic filters of various colors such as red, orange, yellow, green, blue, purple, etc. Preferably, at least two monochromatic filters are included.

[0046] Further, the color wheel 300 is rotated and positioned by a driving motor, and the filter position is monitored in real time by a position sensor such as a photoelectric encoder. When an external trigger signal is input, the driving motor can switch the target color filter to the center position of the spot S, meeting the requirement of fast color adjustment.

[0047] Specifically, the color wheel 300 is driven to rotate by a driving motor; when the white filter coincides with the center position of the above-mentioned fine spot S, the fiber optic light source can output white light, and the remaining positions output light of different colors; the specified color filter can be quickly switched when needed by an external trigger signal, meeting the requirement of special occasions.

[0048] Further, the color wheel 300 is placed at the fine spot S, which can minimize the outer diameter of the color wheel 300 and improve the rotation speed of the color wheel.

[0049] Further, the shaping assembly 400 is coaxially arranged with the converging assembly 200 and located behind the color wheel 300, and the shaping assembly 400 and the converging assembly form a Kohler-like illumination system composed of two double convex lenses. In this way, on the one hand, the light filtered out by the color wheel 300 can be shaped into a spot with a size consistent with the incident end surface of the fiber optic light beam, reducing light energy loss; on the other hand, the light can be more uniform.

[0050] In this embodiment, the aspheric design of the double lens can simultaneously achieve spot shaping and light intensity uniformization, so that the spot uniformity of the input end surface of the fiber optic light beam 500 reaches more than 90%.

[0051] Further, in this embodiment, the light field uniformity is improved by increasing the number of lenses or using free-form surface lenses.

[0052] Specifically, the shaping assembly 400 is composed of two or more lenses, and the surface of the multiple lenses has higher degrees of freedom to improve the uniformity of the light; in this embodiment, the shaping assembly 400 is composed of two double convex lenses, and the light filtered out by the above-mentioned filter is converged and shaped by the two double convex lenses and coupled into the inside of the fiber optic light beam 500 from the incident end surface of the fiber optic light beam.

[0053] Finally, it should be noted that although the above-mentioned embodiments have been described in the specification and drawings of the present application, they do not limit the patent protection scope of the present application. Any equivalent structure or equivalent flow replacement or modification based on the essential concept of the present application, using the content described in the specification and drawings of the present application, and directly or indirectly implementing the technical solutions of the above-mentioned embodiments in other related technical fields, are all included in the patent protection scope of the present application.

Claims

1. An LED fiber optic light source, comprising: The application relates to an LED light source (100), a converging assembly (200), a color wheel (300), a shaping assembly (400) and a fiber light guide (500) arranged along a light path in sequence. The converging assembly (200) is used for converging the divergent light of the LED light source (100) into a fine light spot. The color wheel (300) comprises a plurality of light filters (310) and is used for cutting the light spot shape into a circle and switching the output of different colors of light. The shaping assembly (400) is used for shaping the light spot to match the input end face of the fiber light guide (500). The converging assembly (200) comprises a collimating lens (210) and a condensing lens (220).

2. The LED fiber optic light source of claim 1, wherein, The collimating lens (210) is a double-convex aspheric lens. In the two convex surfaces of the collimating lens (210), the more convex surface is arranged towards the condensing lens (220).

3. The LED fiber optic light source of claim 2, wherein, The collimating lens (210) is a large numerical aperture aspheric lens.

4. The LED fiber optic light source of claim 2, wherein, The color wheel (300) is provided with a driving motor for rotating the color wheel (300) to switch the positions of the light filters (310) and a position sensor for sensing the positions of the light filters (310) on the color wheel (300).

5. The LED fiber optic light source of claim 1, wherein, The shaping assembly (400) is coaxial with the converging assembly (200) and is located behind the color wheel (300).

6. The LED fiber optic light source of claim 1, wherein, The color wheel comprises a plurality of circular light filters (310).

7. The LED fiber optic light source of any of claims 1-6, wherein, The plurality of light filters (310) comprise a white light filter and at least two single-color light filters.

8. The LED fiber optic light source of claim 7, wherein, The colors of the single-color light filters are red, orange, yellow, green, cyan, blue or purple. The shaping assembly (400) comprises two or more lenses.

9. The LED fiber optic light source of claim 1, wherein, ​

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