CN117283913A - Manufacturing method of light guide structure and light guide structure - Google Patents

Manufacturing method of light guide structure and light guide structure Download PDF

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Publication number
CN117283913A
CN117283913A CN202311247748.7A CN202311247748A CN117283913A CN 117283913 A CN117283913 A CN 117283913A CN 202311247748 A CN202311247748 A CN 202311247748A CN 117283913 A CN117283913 A CN 117283913A
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CN
China
Prior art keywords
light guide
guide structure
light
manufacturing
array
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311247748.7A
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Chinese (zh)
Inventor
王虎岩
姜利
王爱慧
包臣胜
王彭通
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weihai Hualing Opto Electronics Co Ltd
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Weihai Hualing Opto Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Weihai Hualing Opto Electronics Co Ltd filed Critical Weihai Hualing Opto Electronics Co Ltd
Priority to CN202311247748.7A priority Critical patent/CN117283913A/en
Publication of CN117283913A publication Critical patent/CN117283913A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00663—Production of light guides
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer

Abstract

The invention provides a manufacturing method of a light guide structure and the light guide structure. The manufacturing method of the light guide structure comprises the following steps: step S1: obtaining a die of the light guide structure to be manufactured according to the design drawing of the light guide structure to be manufactured; step S2: milling the surface of the die by adopting a chamfering tool or a ball tool to form a groove array; step S3: roughening the surface of the mold with the groove array; step S4: and assembling the mold, and forming a light guide structure after an injection molding process, wherein the light guide structure is provided with a reflecting surface, the reflecting surface is formed by the surface of the mold with the groove array, and the reflecting surface is provided with roughness after being subjected to rough treatment and a bulge array complementary to the groove array. The invention solves the problems of high cost and high operation difficulty in the manufacture of the light guide structure in the prior art.

Description

Manufacturing method of light guide structure and light guide structure
Technical Field
The invention relates to the technical field of contact type image sensing equipment, in particular to a manufacturing method of a light guide structure and the light guide structure.
Background
Along with the development of technology and the continuous update of equipment, the light guide structure applied to the image sensor is also continuously updated. The existing manufacturing method of the light guide structure comprises a printing process and a non-printing process, and the high-precision characteristic of the non-printing process is adopted and implemented by various manufacturers.
At present, a lot of non-printing processing technologies of the light guide structure exist, mainly a single crystal diamond cutter is adopted to process V-CUT grooves on a die or a point impacting machine is adopted to impact a regular lattice on the die. The width of the V-CUT grooves and points is generally 50-200 um, even smaller, the precision requirement is high, the price of the equipment and the cutters is relatively high, the cost is high, the equipment process is complex, the operation is complex, the difficulty is high, and the operators are difficult to get up.
That is, the light guide structure in the prior art has problems of high cost and great operation difficulty in manufacturing.
Disclosure of Invention
The invention mainly aims to provide a manufacturing method of a light guide structure and the light guide structure, so as to solve the problems of high cost and high operation difficulty in manufacturing the light guide structure in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a method of manufacturing a light guide structure, comprising: step S1: obtaining a die of the light guide structure to be manufactured according to the design drawing of the light guide structure to be manufactured; step S2: milling the surface of the die by adopting a chamfering tool or a ball tool to form a groove array; step S3: roughening the surface of the mold with the groove array; step S4: and assembling the mold, and forming a light guide structure after an injection molding process, wherein the light guide structure is provided with a reflecting surface, the reflecting surface is formed by the surface of the mold with the groove array, and the reflecting surface is provided with roughness after being subjected to rough treatment and a bulge array complementary to the groove array.
Further, after step S3, the roughness of the surface of the mold having the groove array is greater than or equal to ra0.6 and less than or equal to ra0.9.
Further, in step S3, the roughening treatment includes one of blasting treatment, spark electrode treatment.
Further, in step S3, the blasting includes: and carrying out sand blasting treatment on the surface of the die with the groove array to form a surface with roughness of Ra0.6 or more.
Further, in step S3, the spark electrode processing includes: step S31: manufacturing an electric spark electrode with a shape complementary to the surface of the mould with the groove array according to the surface; step S32: and adjusting the machining roughness of the electric spark machine tool, and performing rough treatment on the surface of the die with the groove array by utilizing the electric spark electrode so as to form the surface with the roughness of more than or equal to Ra0.6.
Further, in step S2, the trench array includes a plurality of trench structures, each of the plurality of trench structures extends along a first direction, and the plurality of trench structures are disposed at intervals along a second direction, so as to form a planar structure between two adjacent trench structures, and the first direction is perpendicular to the second direction.
Further, in step S2, the depth of the trench structure is set to be equal to or greater than 0.1mm, the width is set to be equal to or greater than 0.2mm, and the center-to-center distance between two adjacent trench structures is set to be equal to or greater than 1mm.
Further, in step S2, the cross-sectional shape of the trench structure in the second direction is configured to be a trapezoid, and an included angle between two sides of the trapezoid is 90 °.
According to another aspect of the present invention, there is provided a light guiding structure manufactured by the above manufacturing method of a light guiding structure, the light guiding structure extends along a second direction, the light guiding structure at least has a light incident surface, a reflecting surface and a light emitting surface, the light incident surface is located at a side portion of the light guiding structure and perpendicular to the second direction, a set of opposite sides of the light incident surface are respectively connected to the reflecting surface and the light emitting surface, the reflecting surface is opposite to the light emitting surface, and the reflecting surface has a convex array.
Further, the roughness of the reflecting surface is equal to or greater than Ra0.6 and equal to or less than Ra0.9.
Further, the bump array includes a plurality of bump structures, each of the plurality of bump structures extends along the first direction, and two adjacent bump structures of the plurality of bump structures are disposed at intervals to form a straight-face structure therebetween.
By applying the technical scheme of the invention, the manufacturing method of the light guide structure comprises the steps S1 to S4, wherein the step S1 is as follows: obtaining a die of the light guide structure to be manufactured according to the design drawing of the light guide structure to be manufactured; step S2: milling the surface of the die by adopting a chamfering tool or a ball tool to form a groove array; step S3: roughening the surface of the mold with the groove array; step S4: and assembling the mold, and forming a light guide structure after an injection molding process, wherein the light guide structure is provided with a reflecting surface, the reflecting surface is formed by the surface of the mold with the groove array, and the reflecting surface is provided with roughness after being subjected to rough treatment and a bulge array complementary to the groove array.
The surface of mould is milled through utilizing the ordinary cutter of chamfer sword or ball sword to this application to form the slot array, the size and the distribution of slot array go on according to the design size, set up like this and avoid adopting diamond cutter or the point of striking machine that the cost is high to realize processing, practiced thrift the cost greatly, this application adopts digit control machine tool and ordinary cutter to realize processing simultaneously, has reduced the processing degree of difficulty and operation complexity, and the operating personnel of being convenient for is last. Because the size of the groove array processed by the common cutter is larger, the light finally emitted by the light guide structure irradiates on an object, bright and dark stripes can appear, and the output deviation of the light guide structure is larger. In order to solve the problem, the rough treatment of the step S3 is adopted, so that the light guide structure manufactured through the injection molding process is provided with a reflecting surface, the reflecting surface is formed by the surface of the mold with the groove array, and the reflecting surface is provided with the roughness after the rough treatment and the convex array complementary with the groove array, thereby eliminating bright and dark stripes, improving output deviation and enabling output light to be more uniform.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 shows a state diagram of the prior art for machining a die core using a diamond tool;
FIG. 2 shows a schematic view of the mold core of FIG. 1;
FIG. 3 is a schematic view showing an angle of a mold core after the mold core is processed by a striker machine in the prior art;
FIG. 4 shows a schematic view of another angle of the mold core of FIG. 3;
fig. 5 is a flowchart showing a method of manufacturing a light guide structure according to a first embodiment of the present invention;
FIG. 6 shows a schematic structural diagram of a light guiding structure according to an alternative embodiment of the present invention;
FIG. 7 shows a schematic view of another angle of the light guiding structure of FIG. 6;
FIG. 8 shows a partial enlarged view of the light guiding structure of FIG. 6;
FIG. 9 is a state diagram of a light guiding structure in a manufacturing process according to a first embodiment of the present invention;
FIG. 10 shows an output waveform of a light guiding structure formed without roughening;
fig. 11 is a state diagram of the method for manufacturing the light guiding structure according to the first embodiment of the present invention after step S3;
FIG. 12 is a schematic view showing an angle of a light guiding structure manufactured by the manufacturing method of the light guiding structure according to the first embodiment of the present invention;
fig. 13 is a waveform diagram showing the output of the light guide structure manufactured by the manufacturing method of the light guide structure according to the first embodiment of the present invention;
fig. 14 is a flowchart showing a method of manufacturing a light guide structure according to a second embodiment of the present invention;
fig. 15 shows a state diagram of a method for manufacturing a light guide structure according to a second embodiment of the present invention.
Wherein the above figures include the following reference numerals:
1. a mold core; 2. a diamond cutter; 101. V-Cut groove; 301. a circular array; 10. a mold; 11. a trench structure; 12. a planar structure; 20. a light guiding structure; 21. a light incident surface; 22. a reflecting surface; 221. a bump structure; 222. a straight-face structure; 23. a light-emitting surface; 30. a first direction; 40. a second direction; 50. and an electric spark electrode.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.
In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present invention.
As shown in fig. 1 to 4, a method of manufacturing a light guide structure in the related art is described. Specifically, fig. 1 and 2 illustrate a state diagram of a prior art machining a mold core 1 by using a diamond tool 2 and a schematic diagram of the machined mold core 1. As can be seen from FIG. 1, the V-Cut groove 101 can be machined on the surface of the mold core 1 by using the diamond tool, and the front end of the single crystal diamond tool 2 is small, so that the size of the machined V-Cut groove 101 is small, the groove depth k is smaller than or equal to 0.1mm, the groove width m is smaller than or equal to 0.2mm, and the groove spacing e is larger than or equal to 2 times the groove width m. In fig. 3 and 4, a schematic diagram of a prior art method for impacting a circular array 301 of cores 1 using an impact machine is depicted. Wherein the diameter n of the spherical concave point is smaller than 0.2mm, the depth j is smaller than or equal to 0.1mm, and the slot spacing is larger than or equal to 2 times the diameter n. From these parameters, it is difficult for common numerical control machine tools and cutters to meet the machining size requirements and precision requirements. Meanwhile, the processing equipment and the cutters are special equipment, the price is high, the cost is high, the equipment operation is complex, the process is complex, and the operation is difficult to get up.
In order to solve the problems of high cost and high operation difficulty in the manufacture of the light guide structure in the prior art, the invention provides a manufacturing method of the light guide structure and the light guide structure.
As shown in fig. 5 to 15, the method for manufacturing the light guiding structure includes steps S1 to S4, and step S1: obtaining a mold 10 for manufacturing the light guide structure according to the design drawing of the light guide structure to be manufactured; step S2: milling the surface of the die 10 with a chamfer or ball cutter to form an array of grooves; step S3: roughening the surface of the mold 10 having the groove array; step S4: the mold 10 is assembled, and then the light guide structure 20 is formed after an injection molding process, the light guide structure 20 has a reflective surface 22, the reflective surface 22 is formed by a surface of the mold 10 having an array of grooves, and the reflective surface 22 has a roughened roughness and an array of protrusions complementary to the array of grooves.
The surface of mould 10 is milled through utilizing the ordinary cutter of chamfer sword or ball sword to this application to form the slot array, the size and the distribution of slot array go on according to the design size, set up like this and avoid adopting diamond cutter or the point of collision machine that the cost is high to realize processing, practiced thrift the cost greatly, this application adopts digit control machine tool and ordinary cutter to realize processing simultaneously, has reduced the processing degree of difficulty and operation complexity, and the operating personnel of being convenient for is last. Because the size of the groove array processed by the common cutter is larger, the light finally emitted by the light guide structure 20 irradiates on an object, and bright and dark stripes can appear, so that the output deviation of the light guide structure 20 is larger. In order to solve the problem, the rough treatment of step S3 is adopted in the present application, so that the light guiding structure 20 manufactured through the injection molding process has a reflecting surface 22, the reflecting surface 22 is formed by the surface of the mold 10 with the groove array, and the reflecting surface 22 has roughness after the rough treatment and a convex array complementary to the groove array, so that the manufactured light guiding structure 20 can eliminate bright and dark stripes, improve output deviation, and make output light more uniform. The purpose of this application is to use common machining and tools to make the light guiding structure 20 that meets the requirements of use.
In the step S2, the surface of the mold 10 is milled by a numerical control machine tool using a chamfer cutter or a ball cutter, and an array of grooves complementary to the convex array of the reflecting surface 22 of the light guiding structure 20 to be finally processed is formed on the surface of the mold 10. In step S4, the processed mold 10 is assembled, and then mounted on an injection molding machine, and an acryl or PC material is added for injection molding to form the light guide structure 20 required for design.
Specifically, before step S3, the roughness of the surface of the mold 10 having the groove array is equal to or less than ra0.1, and after step S3, the roughness of the surface of the mold 10 having the groove array is equal to or greater than ra0.6 and equal to or less than ra0.9. After the rough treatment, the roughness of the reflecting surface 22 of the finally manufactured light guide structure 20 is increased, so that the output deviation is optimized, and the stray light is avoided to ensure the light condensing effect.
Specifically, the light guiding structure 20 may be plate-shaped or strip-shaped, in step S2, the groove array of the mold 10 includes a plurality of groove structures 11, the plurality of groove structures 11 extend along the first direction 30, and the plurality of groove structures 11 are disposed at intervals along the second direction 40, so as to form the planar structure 12 between two adjacent groove structures 11, and the first direction 30 is perpendicular to the second direction 40. It is also understood that the surface of the mold 10 having the array of grooves is comprised of alternating arrangements of groove structures 11 and land structures 12.
In step S3, the roughening treatment includes one of blasting treatment and spark electrode treatment.
The following describes the method for manufacturing the light guide structure of the present application in terms of a specific processing manner of the roughening treatment divided into two embodiments with reference to the drawings.
Example 1
As shown in fig. 5 to 13, a method of manufacturing the light guide structure of the first embodiment is described. Fig. 5 shows a flowchart of a method of manufacturing the light guide structure of the present embodiment.
In a first embodiment, the roughening is grit blasting. The sand blasting treatment includes: the surface of the mold 10 having the groove array is sandblasted to form a surface having a roughness of ra0.6 or more. Such that the roughness of the surface of the mold 10 having the groove array is equal to or greater than ra0.6 and equal to or less than ra0.9.
As shown in fig. 6 to 8, schematic diagrams of the light guide structure 20 manufactured by the manufacturing method of the light guide structure of the first embodiment are shown.
As shown in fig. 9, a schematic structural diagram of the mold 10 and a schematic diagram of the manufactured light guiding structure 20 are shown. As can be seen from the figure, the reflective surface 22 of the light guiding structure 20 is a surface with an array of grooves on the mold 10, and in step S2, the depth h 'of the groove structures 11 is 0.1mm or more and the width g' is 0.2mm or more, and the center-to-center distance p between two adjacent groove structures 11 is 1mm or more. And the cross-sectional shape of the groove structure 11 in the second direction 40 is trapezoidal, and the included angle between the two sides of the trapezoid is 90 °. Of course, the specific dimensions of the trench structure 11 may be designed to follow the dimensions of the raised structures 221 of the reflective surface 22 of the light guiding structure 20 that are actually required. Since the specific dimensions of the trench structure 11 of the present application are not too small, machining in this range of dimensions can be achieved with conventional tools. Thereby avoiding the problems of using expensive, professional and complex processing equipment and tools.
Specifically, when a common cutter is used for processing, the size of the processing is larger and is generally larger than 0.2mm, so that light emitted by the light guide structure 20 irradiates an object to generate bright and dark stripes, and as can be seen in fig. 10, the waveform output by the light guide structure 20 is thicker, which means that the deviation of the light guide structure 20 is larger. To solve this problem, the surface of the mold 10 having the groove array is sandblasted to increase the roughness, eliminate the bright and dark fringes, and make the output light more uniform.
Preferably, in the sand blasting process, the sand blasting parameter is 180# silicon carbide, and the sand blasting pressure is 0.6Mpa.
As shown in fig. 11 and 12, a schematic view of the mold 10 and the light guiding structure 20 formed after the sand blasting process is shown. Fig. 13 is a waveform diagram of the output of the light guiding structure 20 manufactured by sand blasting, and it can be seen from the figure that the output waveform is obviously thinned, which means that the deviation of the light guiding structure 20 is obviously reduced, so that the influence of the depth, width and spacing of the structure on the output deviation is greatly improved.
Example two
As shown in fig. 14 and 15, a method of manufacturing the light guide structure of the second embodiment is described. Fig. 14 shows a flowchart of a method of manufacturing the light guide structure of the present embodiment.
In the second embodiment, the difference from the first embodiment is that the roughening treatment is spark electrode treatment. The remaining steps are the same.
Specifically, the spark electrode treatment includes:
step S31: manufacturing an electric spark electrode 50 with a shape complementary to the surface of the mould 10 with the groove array;
step S32: the surface of the die 10 having the groove array is roughened by the spark electrode 50 by adjusting the machining roughness of the spark machine, thereby forming a surface having a roughness of at least Ra0.6 and at most Ra0.9.
As shown in fig. 15, it is known that the conventional electric discharge machine can autonomously select the roughness of the machined surface as required, and thus, it is possible to select a mode in which the roughness requirement is ra0.6 to ra0.9 for machining, thereby obtaining a desired surface roughness. The embodiment adopts the electric spark processing technology, and obtains the non-mirror surface with the roughness of Ra0.6-Ra0.9 by parameter control so as to eliminate bright and dark stripes and lead the output light to be more uniform.
Referring to fig. 6 to 8, the present application further provides a light guiding structure 20, where the light guiding structure 20 is manufactured by the manufacturing method of the light guiding structure, the light guiding structure 20 is strip-shaped and extends along the second direction 40, the light guiding structure 20 at least has a light incident surface 21, a reflecting surface 22 and a light emitting surface 23, the light incident surface 21 is located at a side portion of the light guiding structure 20, specifically, a left end portion in fig. 6 and is perpendicular to the second direction 40, a set of opposite sides of the light incident surface 21 are respectively connected with the reflecting surface 22 and the light emitting surface 23, the reflecting surface 22 is opposite to the light emitting surface 23, and the reflecting surface 22 has a convex array. The bump array includes a plurality of bump structures 221, the bump structures 221 are disposed at intervals along the extending direction of the light guiding structure 20, the bump structures 221 extend along the first direction 30, and two adjacent bump structures 221 in the bump structures 221 are disposed at intervals to form a straight-face structure 222 therebetween. It will also be appreciated that the reflective surface 22 is comprised of alternating raised structures 221 and straight structures 222.
Specifically, the reflective surface 22 of the light guiding structure 20 is formed by the surface of the mold 10 having the groove array, and specifically, the convex structure 221 and the straight structure 222 of the reflective surface 22 are formed by the groove structure 11 and the plane structure 12 of the mold 10, respectively.
Specifically, the roughness of the reflecting surface 22 is equal to or greater than ra0.6 and equal to or less than ra0.9. The reflecting surface 22 is an uneven surface and has a certain roughness, so that the reflecting effect of the reflecting surface 22 is ensured, the bright and dark fringes of the final display are improved, and the output light is more uniform.
It should be noted that, in the embodiment of the present application, the light guiding structure 20 is in a strip shape, and of course, in other alternative embodiments, the light guiding structure 20 may also be in a plate shape.
Referring to fig. 6, an LED chip for emitting light is located at the left end of the light guide structure 20, thereby realizing side light entrance, and light incident from the light entrance surface 21 enters the light guide structure 20 and then exits from the light exit surface 23 by reflection of the reflection surface 22. The second direction 40 is the light incident direction.
As shown in FIG. 8, the height depth h of the convex structures 221 of the reflecting surface 22 of the light guiding structure 20 is equal to or greater than 0.1mm, the width g is equal to or greater than 0.2mm, and the center-to-center distance between two adjacent convex structures 221 is equal to or greater than 1mm.
It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (11)

1. A method of manufacturing a light guide structure, comprising:
step S1: obtaining a die (10) of the light guide structure to be manufactured according to a design drawing of the light guide structure to be manufactured;
step S2: milling the surface of the mould (10) by a chamfering tool or a ball tool to form a groove array;
step S3: roughening a surface of the mold (10) having an array of grooves;
step S4: the mold (10) is assembled, and then the light guide structure (20) is formed after an injection molding process, the light guide structure (20) is provided with a reflecting surface (22), the reflecting surface (22) is formed by the surface of the mold (10) with the groove array, and the reflecting surface (22) is provided with the roughness after the roughening treatment and the protrusion array complementary to the groove array.
2. The method according to claim 1, wherein after the step S3, the roughness of the surface of the mold (10) having the groove array is equal to or greater than ra0.6 and equal to or less than ra0.9.
3. The method of manufacturing a light guide structure according to claim 1, wherein in the step S3, the roughening treatment includes one of blasting and spark electrode treatment.
4. A method of manufacturing a light guide structure according to claim 3, wherein in the step S3, the blasting includes:
and carrying out sand blasting on the surface of the mould (10) with the groove array to form a surface with roughness of Ra0.6 or more.
5. A method of manufacturing a light guide structure according to claim 3, wherein in step S3, the spark electrode treatment comprises:
step S31: manufacturing an electric spark electrode (50) with a shape complementary to the surface of the mould (10) with the groove array;
step S32: and (3) adjusting the machining roughness of an electric spark machine tool, and performing rough treatment on the surface of the die (10) with the groove array by utilizing the electric spark electrode (50) so as to form the surface with the roughness of more than or equal to Ra0.6.
6. A method of manufacturing a light guiding structure according to claim 1, wherein in the step S2, the trench array comprises a plurality of trench structures (11), the plurality of trench structures (11) each extend along a first direction (30), and the plurality of trench structures (11) are arranged at intervals along a second direction (40) to form a planar structure (12) between two adjacent trench structures (11), the first direction (30) being perpendicular to the second direction (40).
7. The method of manufacturing a light guide structure according to claim 6, wherein, in the step S2,
the depth of the groove structures (11) is larger than or equal to 0.1mm, the width of the groove structures is larger than or equal to 0.2mm, and the center-to-center distance between two adjacent groove structures (11) is larger than or equal to 1mm.
8. The method of manufacturing a light guide structure according to claim 6, wherein, in the step S2,
the cross-sectional shape of the groove structure (11) in the second direction (40) is arranged to be trapezoid, and an included angle between two sides of the trapezoid is 90 degrees.
9. A light guiding structure, characterized in that the light guiding structure is manufactured by the manufacturing method of the light guiding structure according to any one of claims 1 to 8, the light guiding structure (20) extends along a second direction (40), the light guiding structure (20) at least has a light incident surface (21), a reflecting surface (22) and a light emergent surface (23), the light incident surface (21) is located at a side portion of the light guiding structure (20) and is perpendicular to the second direction (40), a group of opposite two sides of the light incident surface (21) are respectively connected with the reflecting surface (22) and the light emergent surface (23), the reflecting surface (22) is opposite to the light emergent surface (23), and the reflecting surface (22) has a convex array.
10. A light guiding structure according to claim 9, wherein the roughness of the reflecting surface (22) is equal to or greater than ra0.6 and equal to or less than ra0.9.
11. The light guiding structure according to claim 9, wherein the raised array comprises a plurality of raised structures (221), each of the plurality of raised structures (221) extending along the first direction (30), adjacent two of the plurality of raised structures (221) being spaced apart to form a straight-sided structure (222) therebetween.
CN202311247748.7A 2023-09-25 2023-09-25 Manufacturing method of light guide structure and light guide structure Pending CN117283913A (en)

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Application Number Priority Date Filing Date Title
CN202311247748.7A CN117283913A (en) 2023-09-25 2023-09-25 Manufacturing method of light guide structure and light guide structure

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Application Number Priority Date Filing Date Title
CN202311247748.7A CN117283913A (en) 2023-09-25 2023-09-25 Manufacturing method of light guide structure and light guide structure

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