Multi-fiber light guide focusing light path shaping system

Abstract

The utility model discloses a multi-optical-fiber light guide focusing light path shaping system, which belongs to the technical field of 3D printing heat sources and comprises a transmission module, a light control module and a shaping module. The light control module is used for controlling luminous flux output of the shaping module; the shaping module comprises an aspherical lens fixing plate, the aspherical lens fixing plate is fixedly connected to the optical supporting rod, the aspherical lens fixing plate is used for fixing a condensing lens group corresponding to a single optical fiber bundle, and a plurality of aspherical lenses are arranged in the condensing lens group in a circular array mode; the transmission module is used for transmitting sunlight to the aspherical lens; according to the utility model, stray sunlight can be homogenized, energy can be focused, meanwhile, spherical aberration and chromatic aberration can be better corrected, and the light spot quality of the lens is further improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to 3D printing heat source technical field especially, it relates to multi -fiber light guide light focusing light path shaping system. BACKGROUND

[0002] The fiber is the conductive light material formed by using the total reflection principle of light in the fiber made of plastic or glass, but the output light is relatively scattered, which leads to the condition that the light spot size of the light beam is large, and the structure capable of shaping the light is proposed. CONTENT

[0003] In view of the deficiency of prior art, the utility model provides multi -fiber light guide light focusing light path shaping system, solves above -mentioned problem.

[0004] In order to realize above -mentioned purpose, the utility model discloses the following technical scheme to realize: including, transmission module, light control module and shaping module;The light control module is used to control the light flux output of shaping module;The shaping module includes aspheric lens fixed plate, and the aspheric lens fixed plate is fixedly connected on the optical support, and the aspheric lens fixed plate is used to fix the corresponding light collecting lens group of single optical fiber bundle, and a plurality of aspheric lenses are arranged in the circular array in the light collecting lens group;The transmission module is used to deliver sunlight to the aspheric lens.

[0005] Beneficial effects

[0006] The utility model provides multi -fiber light guide light focusing light path shaping system, and compared with prior art has the following beneficial effects:

[0007] The 36 optical fibers are fixed in the same plane by the optical fiber bundle fixed plate, the 36 optical fibers emit sunlight with a certain divergence angle, become parallel light through the aspheric lens array group, and the 36 parallel light beams converge on a point through the fresnel condenser lens in the focusing mirror fixed plate, so that the light beam shaping is completed. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 It is three -dimensional structure schematic diagram of the utility model.

[0009] Figure 2 It is aspheric lens array rule schematic diagram of the utility model.

[0010] Figure 3 It is aspheric lens imaging schematic diagram of the utility model.

[0011] Figure 4 It is the geometric relation schematic diagram of the utility model optical fiber and aspheric lens.

[0012] Figure 5 It is optical fiber light guide schematic diagram of the utility model.

[0013] Figure 6 It is aspheric lens schematic view of the utility model.

[0014] Figure 7 It is optical path shaping process schematic view of the utility model.

[0015] Mark annotation: optical fiber bundle fastener 1, optical support 2, optical fiber bundle fixed plate 3, optical fiber fixed plate 4, aspheric lens fixed plate 5, focusing mirror fixed plate 6, lower baffle 7, lens fixed plate 8, base plate 9, wire feeder nozzle 10. DETAILED DESCRIPTION

[0016] In order to make the utility model purposes, technical scheme and advantages more clearly, the following is combined with the embodiment, and the utility model is further detailedly explained.It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0017] The specific implementation of the utility model is described in detail in the following combined with specific embodiments.

[0018] Please refer to Figure 1 , the utility model embodiment provides, multi-fiber light guiding focusing optical path shaping system, including, transmission module, for conveying sunlight to the designated area;

[0019] Shaping module is used to shape stray sunlight output by transmission module into parallel light;

[0020] And, light control module is used to change spot diameter and control light flux output;

[0021] The shaping module includes aspheric lens fixed plate, the aspheric lens fixed plate 5 is fixedly connected on optical support 2, the aspheric lens fixed plate 5 is used to fix the corresponding condensing lens group of single optical fiber bundle, and multiple aspheric lenses are arranged in the circular array in the condensing lens group.

[0022] Please refer to Figure 1 And Figure 4 Specifically, the aspheric lens is fixed on the lens fixed plate through the lens compression ring, the lens compression ring is the annular compression ring with external thread, is used to fix aspheric lens, guarantees the stability of aspheric lens when moving in multi-fiber light guiding focusing optical path shaping system.

[0023] Please refer to Figure 2 And Figure 3Specifically, the four-ring aspheric lens in the condenser lens group includes one aspheric lens in the first ring, six aspheric lenses in the second ring, twelve aspheric lenses in the third ring, and eighteen aspheric lenses in the fourth ring, and a total of six equal parts are formed to correspond to six optical fibers contained in each optical fiber bundle, thereby ensuring uniform light reception in each area.

[0024] Please refer to Figure 6 and Figure 7 Specifically, the aspheric lens has a non-constant radius of curvature, and the radius of curvature continuously changes from the middle to the edge along the principal axis, so as to better correct spherical aberration and chromatic aberration, thereby improving the spot quality of the lens. When the light emitted by the optical fiber enters the aspheric lens, the light and the aspheric lens have a geometric relationship.

[0025] Please refer to Figure 1 Specifically, the optical support rod 2 is sequentially fixedly connected with the optical fiber bundle fixing plate 3, the optical fiber fixing plate 4, the focusing mirror fixing plate 6, and the lower baffle 7. The optical fiber bundle fastener 1 is connected to the optical fiber bundle fixing plate 3 for fastening the optical fiber bundle. The optical fiber bundle contains a plurality of optical fibers. The focusing mirror fixing plate 6 is connected with the lens fixing plate 8 for limiting the position of the lens.

[0026] Please refer to Figure 1 Specifically, the optical fiber bundle fixing plate 3 is used for secondary fastening of the optical fiber bundle. The optical fiber fixing plate 4 is used for fixing a single optical fiber in the optical fiber bundle. The focusing mirror fixing plate 6 is used for fixing the Fresnel condenser. The lower baffle 7 is used for blocking stray light and connecting the light control module.

[0027] Please refer to Figure 1 Specifically, the shaping module further includes a base plate 9 and a wire feeder 10. The base plate 9 is fixedly connected with the optical fiber bundle fixing plate 3, the optical fiber fixing plate 4, the focusing mirror fixing plate 6, and the lower baffle 7. The wire feeder 10 is used for feeding the printing wire to the focused light spot.

[0028] Please refer to Figure 1 Specifically, the transmission module includes a plurality of optical fiber bundles, and the optical fiber bundles are fixed in the optical fiber bundle fastener 1.

[0029] Please refer to Figure 1 Specifically, the light control module includes a diaphragm, which is fixedly connected to the lower baffle 7. The diaphragm changes the size of the aperture to change the size of the light spot. When the diaphragm is opened, the light beam is not blocked, and the light flux is 100% at this time. When the diaphragm is half open, the sunlight beam is in a Gaussian distribution, the central light energy density is high, and the edge decreases, so the light flux is about 70%. When the diaphragm is closed, the light beam is completely blocked by the aluminum alloy blade of the diaphragm, and the light flux is 0% at this time.

[0030] Specifically, refer to Figure 5 and Figure 6 , the optical fiber is a light conducting material formed by using the principle of total reflection of light in a plastic or glass fiber, and the key components are a core and a cladding with different refractive indexes, n1 and n2 respectively, when the light ray is refracted into the optical fiber from the end face of the optical fiber, to the critical surface of the core and the cladding with slightly lower refractive index, and the angle is greater than the critical angle of total reflection, the light ray does not leak and is totally reflected. The relationship between the maximum incident angle θmax of the light ray and the refractive index of the optical fiber is as follows, wherein n0 is the refractive index of air, and the numerical aperture NA represents the ability of the optical fiber to accept light, and the formula is as follows:

[0031] The incident light in the optical fiber is not a light ray, after the sunlight is converged by the light collection system, the coupling efficiency of the sunlight and the optical fiber needs to be improved as much as possible, and the coupling needs to meet that the size of the focal spot is not greater than the size of the core, and half of the beam divergence angle α should be not greater than the inverse trigonometric function value of the numerical aperture NA of the optical fiber.

[0032] In the embodiment of the utility model, the optical fiber bundle fixing plate 3 fixes 36 optical fibers in the same plane, 36 optical fibers emit sunlight with a certain divergence angle, and the sunlight becomes parallel light through the aspherical lens array group, and 36 parallel lights converge on a point through the Fresnel condenser in the focusing mirror fixing plate 6, so that the beam shaping is completed.

[0033] Please refer to Figure 4 , d - optical fiber diameter, BFL - back focal length, α - divergence half angle Y - vertical distance of spot edge distance from optical fiber outer edge, A - spot diameter, D - lens diameter, c - lens compression ring thickness, then the parameters can be obtained as follows:

[0034] Y=tanα BFL

[0035] A=2 Y+d

[0036] Then, for the optical fiber diameter d=1mm, the spot diameter A and the back intercept BFL have the following relationship: A=2 Y+d=2 tan (21.72 °) BFL+1=0.7967BFL+1In order not to block the light, the lens diameter D is greater than the lens compression ring thickness c + the spot diameter A. Therefore, the lens needs to be selected with small focal length and large diameter. Finally, the A560 type aspherical lens is selected.

[0037] The optical fiber properties of the utility model are shown in Table 1, and the lens optical parameter properties of the utility model are shown in Table 2.

[0038] Table 1 Optical fiber properties

[0039]

[0040] Table 2 Lens Optical Parameter Attributes

[0041]

[0042] It should be noted that the relational terms herein, such as first and second, and the like, are used solely to distinguish one from another entity or action without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0043] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A multi-fiber light-guide focusing light path shaping system, characterized by, The application relates to a light transmission device, which comprises the following parts: a transmission module for transmitting sunlight to a designated area; a light control module for controlling light flux output; and a shaping module, which comprises an aspheric lens fixing plate (5) fixedly connected to an optical support rod (2), the aspheric lens fixing plate being used for fixing a single optical fiber bundle corresponding condensing lens group, and a plurality of aspheric lenses being arranged in a circular array in the condensing lens group.

2. The multi-fiber light-guiding focusing light path shaping system according to claim 1, characterized in that, The aspheric lens is fixed on the aspheric lens fixing plate (5) through a lens pressing ring, the lens pressing ring is an annular pressing ring with external threads, is used for fixing the aspheric lens, and guarantees the stability of the aspheric lens when the aspheric lens moves in the multi-fiber light guiding and focusing light path shaping system.

3. The multi-fiber light-guide focusing light path shaping system of claim 1, wherein, There are four rings of aspheric lenses in the condensing lens group, the first ring is one aspheric lens, the second ring is six aspheric lenses, the third ring is 12 aspheric lenses, and the fourth ring is 18 aspheric lenses, so that six equal parts are formed, corresponding to six optical fibers contained in each optical fiber bundle, and uniform light receiving of each area is guaranteed.

4. The multi-fiber light-guide focusing light path shaping system of claim 1, wherein, The aspheric lens has a non-constant curvature radius, the curvature radius continuously changes from the middle to the edge along the main optical axis, so that the spherical aberration and chromatic aberration can be better corrected, and the light spot quality of the lens is improved.

5. The multi-fiber light-guide focusing light path shaping system of claim 1, wherein, The optical support rod (2) is sequentially fixedly connected with an optical fiber bundle fixing plate (3), an optical fiber fixing plate (4), a focusing mirror fixing plate (6) and a lower baffle (7), the optical fiber bundle fixing plate (3) is connected with an optical fiber bundle fastener (1) for fastening the optical fiber bundle, the optical fiber bundle contains a plurality of optical fibers, and the focusing mirror fixing plate (6) is connected with a lens fixing plate (8) for limiting the position of a focusing mirror.

6. The multi-fiber light-guide focusing light path shaping system of claim 5, wherein, The optical fiber bundle fixing plate (3) is used for secondary fastening of the optical fiber bundle, the optical fiber fixing plate (4) is used for fixing single optical fibers in the optical fiber bundle respectively, the focusing mirror fixing plate (6) is used for fixing a Fresnel condensing mirror, and the lower baffle (7) is used for blocking stray light and connecting the light control module.

7. The multi-fiber light-guide focusing light path shaping system of claim 1, wherein, The device further comprises a base plate (9) and a wire feeding nozzle (10), the base plate (9) is fixedly connected with the optical fiber bundle fixing plate (3), the optical fiber fixing plate (4), the focusing mirror fixing plate (6) and the lower baffle (7), and the wire feeding nozzle (10) is used for feeding printing wire to a focused light spot.

8. The multi-fiber light-guide focusing light path shaping system of claim 1, wherein, The transmission module comprises a plurality of optical fiber bundles, and the optical fiber bundles are fixed in the optical fiber bundle fastener (1).

9. The multi-fiber light-guide focusing light path shaping system of claim 6, wherein, The light control module comprises a diaphragm, the diaphragm is fixedly connected to the lower baffle (7), and the diaphragm adjusts light flux by changing the size of the aperture.

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