Method, device and 3D printer for adjusting light rays of light source of 3D printer

Abstract

This application relates to a method and device for adjusting the light rays of a light source of a 3D printer, and a 3D printer. The method includes: determining an initial divergence angle of the light rays of the light source; and arranging a light beam converging component in a region at a preset distance close to the light source according to the initial divergence angle, so as to converge the initial divergence angle of the light rays. The method of this application adjusts the divergence angle of the light rays by using the light beam converging component, thereby changing the initial divergence direction of the light rays, and then realizing the adjustment of the collimation degree and evenness degree of the light rays of the light source, so as to improve the forming dimension accuracy of an object to be formed in 3D printing and improve the printing quality.

Description

Technical Field

[0001] This application relates to the technical field of 3D printers, and particularly to a method and device for adjusting the light rays of a light source of a 3D printer, and a 3D printer. Background Art

[0002] Stereolithography 3D printing is a technology that constructs objects by layer-by-layer stacking and accumulation based on digital model files, using photosensitive resin. Its main principle is: taking advantage of the characteristic that the fluid state of photosensitive resin undergoes a polymerization reaction under light irradiation, irradiating the light source according to the cross-sectional shape of the object to be formed, so that the fluid state of the resin is cured and formed. Currently, the more popular 3D printers are LCD (Liquid Crystal Display) stereolithography 3D printers. They transmit the cross-sectional pattern of the object to be formed layer by layer to the LCD screen through a data transmission device, and then irradiate the LCD screen with light of a specific wavelength. The LCD screen has light-transmitting areas and non-light-transmitting areas according to the cross-sectional pattern, so that the photosensitive resin above the light-transmitting area of the LCD screen corresponds to the transmitted pattern and is cured, and then stacked layer by layer to form the final printing target.

[0003] In an LCD stereolithography 3D printer, generally, a certain array number of LED light sources are used to irradiate the LCD screen. It can be understood that the collimation of the light rays emitted by the light source and the uniformity of the light intensity are very important. The higher the collimation of the light rays, the better the quality of the microstructures of the object to be formed; the higher the uniformity of the light intensity, the more uniform the light intensity for irradiating the photosensitive resin, and the smaller the error of the formed size.

[0004] However, as Figure 1 shown, the most ideal light divergence state of the light source is the light state in Figure (a), that is, the light rays are parallel to the optical axis, and the collimation reaches 100%. But in reality, there is often a situation shown in Figure (b), that is, the light rays of the LED light source are divergent, and each light ray emitted by each LED light source is not parallel to the optical axis. The angle between each light ray emitted by the LED light source and the optical axis, that is, the initial divergence angle O, is greater than the angle when the light rays are parallel to the optical axis, resulting in an overlap in the areas irradiated by two adjacent LED light sources. As Figure 2 shown, two adjacent LED light sources respectively irradiate areas X and Y of the LCD screen. However, due to the divergence of the light rays of the light source, an overlapping light area Z is generated between areas X and Y. The overlapping light area Z superimposes the light rays of two light sources, resulting in a light intensity greater than that of a single light source such as area X and area Y.

[0005] In such a case, when both region X and region Y are in the light-blocking area, the corresponding photosensitive resin should not solidify. However, the light intensity in the light-overlapping region Z is superimposed to be large enough, and is significantly uneven compared with the light intensities in region X and region Y. As a result, the light penetrates through the light-blocking area of the LCD screen, causing the photosensitive resin at the corresponding position to possibly solidify, thus forming a non-target print. When both region X and region Y are in the light-transmitting area, the light intensity received by the photosensitive resin in the corresponding overlapping region Z is greater. Then, the dimensional accuracy of the photosensitive resin after curing is inconsistent with the dimensional accuracy of the photosensitive resin corresponding to region X and region Y after curing. Summary of the Invention

[0006] To solve or partially solve the problems existing in the related art, the present application provides a method and device for adjusting the light rays of a light source of a 3D printer and a 3D printer. The method and device for adjusting the light rays of the light source of the 3D printer and the 3D printer can improve the collimation of the light rays of the light source and the uniformity of the light intensity, so that the light penetrating the entire screen area can be homogenized and collimated, thereby improving the forming dimensional accuracy of the object to be formed.

[0007] The first aspect of the present application provides a method for adjusting the light rays of a light source of a 3D printer, which includes:

[0008] Determine the initial divergence angle of the light rays of the light source;

[0009] According to the initial divergence angle, a light-ray converging component is arranged in a region at a preset distance close to the light source, so as to converge the initial divergence angle of the light rays.

[0010] In one embodiment, the determining the initial divergence angle of the light rays of the light source includes:

[0011] According to the arrangement position of each light source, determine the initial divergence angle of the light rays of each light source.

[0012] In one embodiment, the according to the initial divergence angle, arranging a light-ray converging component in a region at a preset distance close to the light source to converge the initial divergence angle of the light rays includes:

[0013] According to the initial divergence angle, a first light-ray converging member is arranged in a region at a first preset distance close to the light source to change the initial divergence angle of the light rays and form a first converging angle;

[0014] According to the first converging angle, a second light-ray converging member is arranged in a region at a second preset distance close to the first light-ray converging member to change the first converging angle and form a second converging angle.

[0015] In one embodiment, after setting a light beam converging component in a region at a preset distance from the light source according to the initial divergence angle to converge the initial divergence angle of the light, it further includes:

[0016] Blocking the light in the overlapping illumination region of adjacent light sources.

[0017] In one embodiment, blocking the light in the overlapping illumination region of adjacent light sources includes:

[0018] Determining the overlapping illumination region corresponding to the intersection angle after the initial divergence angles of the light rays of adjacent light sources are converged;

[0019] Setting a light blocking member at a preset position in the overlapping illumination region to block the light corresponding to the overlapping illumination region.

[0020] A second aspect of the present application provides an adjustment device for the light source light of a 3D printer, which includes a light source and a light beam converging component, wherein:

[0021] The light beam converging component is arranged on one side of the outgoing light of the light source and is at a preset distance from the light source, and the light beam converging component is used to converge the initial divergence angle of the light source.

[0022] In one embodiment, the light beam converging component includes a plurality of first light beam converging members and a plurality of second light beam converging members. Among them, the first light beam converging members are arranged on one side of the outgoing light of the light source and are spaced apart from the light source by a first preset distance; the second light beam converging members are arranged on the side of the first light beam converging members away from the light source and are spaced apart from the first light beam converging members by a second preset distance.

[0023] In one embodiment, the adjustment device further includes a light blocking member, and the light blocking member is arranged at the position where the light rays of two adjacent light sources intersect, and the cross-sectional area of the light blocking member corresponds to the cross-sectional area of the included angle of the light rays of two adjacent light sources after convergence.

[0024] In one embodiment, the light beam converging component includes multiple groups of plano-convex lenses, the number of each group of plano-convex lenses corresponds to the number of light sources, and each plano-convex lens is arranged corresponding to the corresponding light source.

[0025] A third aspect of the present application provides a 3D printer, which includes the adjustment device for the light source light of the 3D printer according to any one of the above embodiments.

[0026] The technical solution provided by the present application may include the following beneficial effects:

[0027] The method for adjusting the light rays of the light source of the 3D printer in this application adjusts the divergence angle of the light rays by using a light beam convergence component, thereby changing the initial divergence direction of the light rays, and then realizing the adjustment of the collimation degree and evenness degree of the light rays of the light source, so as to improve the forming size accuracy of the object to be formed in 3D printing and improve the printing quality.

[0028] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. Brief Description of the Drawings

[0029] By describing the exemplary embodiments of this application in more detail in combination with the drawings, the above and other objects, features, and advantages of this application will become more obvious. Among them, in the exemplary embodiments of this application, the same reference numerals generally represent the same components.

[0030] Figure 1 is a comparison schematic diagram of the collimation degree of the light rays of the light source in the related art;

[0031] Figure 2 is an overlapping schematic diagram of the irradiation areas of the light rays of the light source in the related art;

[0032] Figure 3 is a schematic flowchart of the method for adjusting the light rays of the light source of the 3D printer shown in an embodiment of this application;

[0033] Figure 4 is a schematic flowchart of the method for adjusting the light rays of the light source of the 3D printer shown in another embodiment of this application;

[0034] Figure 5 is a schematic diagram of light ray divergence without a light ray interception member of the light ray adjustment device of the 3D printer shown in an embodiment of this application;

[0035] Figure 6 is a schematic diagram of light ray simulation at the appropriate position of the light ray interception member of the light ray adjustment device of the 3D printer shown in an embodiment of this application;

[0036] Figure 7 is Figure 6 the light ray schematic diagram of the light ray divergence simulation schematic diagram;

[0037] Figure 8 is the light ray schematic diagram at the wrong position of the light ray interception member of the light ray adjustment device of the 3D printer in this application;

[0038] Figure 9 is the light ray schematic diagram of the compound eye lens of the light ray adjustment device of the 3D printer shown in an embodiment of this application;

[0039] Figure 10 Yes Figure 9 Schematic diagram of the light ray principle of the compound eye lens shown;

[0040] Figure 11 It is the anti - blue light detection spectrogram of the light source light ray adjustment device of the 3D printer shown in an embodiment of the present application. Detailed implementation manners

[0041] Hereinafter, the implementation manners of the present application will be described in more detail with reference to the accompanying drawings. Although the implementation manners of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the implementation manners set forth herein. On the contrary, these implementation manners are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0042] It should be understood that although the terms "first", "second", "third", etc. may be used in the present application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0043] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0044] Unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0045] In the related art, there are problems with poor collimation and uniformity of the light emitted by the LED light source of the LCD light-curing 3D printer, which affect the final forming size accuracy of the product and thus the printing quality.

[0046] In view of the above problems, an embodiment of the present application provides a method and device for adjusting the light of a light source of a 3D printer and a 3D printer, which can improve the collimation of the light of the light source and the uniformity of the light intensity, so that the light penetrating the entire screen area can be homogenized and collimated, thereby improving the forming size accuracy of the object to be formed.

[0047] The technical solutions of the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0048] See Figure 3 , an embodiment of the present application provides a method for adjusting the light of a light source of a 3D printer, which includes:

[0049] Step S110, determining the initial divergence angle of the light of the light source.

[0050] See Figure 1 and Figure 5 , it can be understood that the light source 100 may have different corresponding performances according to the types of the light-emitting elements used, and its initial divergence angle O of the light may be different. In one embodiment, the light source 100 is an LED light source, and a plurality of LED light sources are arranged in an array. That is to say, the light source 100 is not limited to one. It can be understood that each light source 100 has a corresponding initial divergence angle O after emitting light, and the lights emitted by the plurality of light sources 100 have an intersection, and the irradiation areas corresponding to adjacent light sources 100 overlap, that is, there is a light overlap area X. In order to reduce the area of the light overlap area X, the subsequent steps are carried out.

[0051] Step S120, setting a light beam converging component in a region at a preset distance from the light source according to the initial divergence angle O, so as to converge the initial divergence angle O of the light.

[0052] See Figure 1 and Figure 5 , according to the initial divergence angle O of the light of each light source 100, the optical path of each light can be determined. By setting an optical component that changes the path on the optical path, the path of the optical path can be changed, that is, the final divergence angle of the light is changed, so as to reduce or avoid the overlapping area of the irradiation areas of adjacent light sources 100, that is, reduce the area of the light overlap area X.

[0053] Further, according to the initial divergence angle O, a light beam converging component 200 is arranged on the optical path of the light, so as to narrow the original divergence range of the light, reduce the divergence angle of the light, and make the initial divergence angle O of the light converge and become smaller, so that the light approaches being parallel to the optical axis as much as possible. In one embodiment, the preset distance can be as close to the light source 100 as possible, so that each light emitted by the light source 100 passes through the light beam converging component 200 for convergence, avoiding light leakage.

[0054] In summary, for the method for adjusting the light source light of the 3D printer of the present application, by using the light beam converging component 200 to adjust the divergence angle of the light, the initial divergence direction of the light is changed, and then the collimation degree and evenness of the light of the light source 100 are adjusted, so as to improve the forming size accuracy of the object to be formed in 3D printing and improve the printing quality.

[0055] For further illustration, refer to Figure 4 , an embodiment of the present application further provides a method for adjusting the light source light of a 3D printer, which includes:

[0056] Step S210, determine the initial divergence angle of the light of each light source according to the arrangement position of each light source.

[0057] Refer to Figure 1 and Figure 5 , it can be understood that the number of light sources 100 is determined according to the number of light-emitting elements. Each light-emitting element is an independent light source 100, and each light source 100 has an independent initial divergence angle O. When the number of light sources 100 is multiple, each light source 100 has a corresponding arrangement position. For example, in one embodiment, multiple light sources 100 are arranged in a J-row and K-column array, and both J and K are natural numbers. In one embodiment, the row spacing of each row of light sources 100 can be the same or different, and the column spacing of each column of light sources 100 can be the same or different. In one embodiment, the distance between every two adjacent light sources 100 is the same, so as to improve the uniformity of the light and reduce the difficulty of light adjustment.

[0058] Step S220, according to the initial divergence angle, use a light beam converging component to perform at least one angle convergence on the light of the light source.

[0059] It can be understood that when the initial divergence angle O is relatively large, only performing one angle convergence may not be able to completely converge the divergence angle of the light to the ideal state.

[0060] Refer to Figure 1 and Figure 5, in one embodiment, according to the initial divergence angle O, a first light beam converging member 210 is arranged in a region at a first preset distance close to the light source 100 to change the initial divergence angle O of the light rays, and a first converging angle E is formed; according to the first converging angle E, a second light beam converging member 220 is arranged in a region at a second preset distance close to the first light beam converging member 210 to change the first converging angle E and form a second converging angle F.

[0061] Specifically, when the angle of the light rays is converged two or more times (including two times), the light beam converging assembly 200 includes a plurality of first light beam converging members 210 and a plurality of second light beam converging members 220. In one embodiment, according to the arrangement position of the light source 100, the corresponding positions of the first light beam converging members 210 are set. When the plurality of light sources 100 are arranged in an array, the plurality of first light beam converging members 210 are arranged in a corresponding array. Each first light beam converging member 210 is arranged on the side close to the light-emitting side of the light source 100 at the first preset distance, so that the light rays of the light source 100 are all converged on the first light beam converging member 210 to avoid light leakage. Through the first light beam converging member 210, the initial divergence angle O is adjusted to the first converging angle E, and the first converging angle E is smaller than the initial divergence angle O. Further, the plurality of second light beam converging members 220 are arranged in a corresponding array, and each second light beam converging member 220 is arranged on the side close to the light-transmitting side of the first light beam converging member 210 at the second preset distance, so that the light rays of the light source 100 are further converged on the second light beam converging member 220 to avoid light leakage. Through the second light beam converging member 220, the first converging angle E is adjusted to the second converging angle F, and the second converging angle F is smaller than the first converging angle E. By successively converging the divergence angle of the light rays of the light source 100, the divergence range of the light rays is reduced, the illumination area of the light rays is reduced, and then the overlapping area of the irradiation areas of adjacent light sources 100 is reduced.

[0062] Further, in order to ensure that each ray of the light source 100 is converged, in one embodiment, the number of the first ray converging members 210 corresponds to the number of the light sources 100, and the light passing aperture of the first ray converging members 210 is larger than the light emitting area of the light source 100, so as to completely converge the rays of the light source 100. In one embodiment, the number of the second ray converging members 220 corresponds to the number of the first ray converging members 210, and the light passing aperture of the second ray converging members 220 is larger than the light passing aperture of the first ray converging members 210, so as to completely converge the rays transmitted by the first ray converging members 210. That is to say, as the rays are continuously converged and reduced and the distances between the ray converging members and the light source 100 are different, in one embodiment, the structural sizes of the second ray converging members 220 are different from those of the first ray converging members 210, and the light passing aperture of the ray converging member farther away from the light source 100 is larger to correspond to the irradiation range of the rays. By analogy, when the ray converging assembly 200 also performs third and above angle convergences on the rays, a third converging member (not shown in the figure) can also be provided. The position and structural size of the third ray converging member are adjusted with reference to the second ray converging member 220. That is, a plurality of first ray converging members 210 are arranged in an array corresponding to the light source 100 to form a group of first ray converging members 210; a plurality of second ray converging members 220 are arranged in an array corresponding to the first ray converging members 210 to form a group of second ray converging members 220; a plurality of third ray converging members are arranged in an array corresponding to the second ray converging members 220 to form a group of third ray converging members; by analogy, details are not described herein again.

[0063] In one embodiment, the ray converging assembly 200 includes plano-convex lenses. The number of the plano-convex lenses corresponds to the number of the light sources 100, and each plano-convex lens is correspondingly arranged with the corresponding light source 100. It can be understood that both the first ray converging members 210 and the second ray converging members 220 are plano-convex lenses. The rays are converged by the plano-convex lenses, so that the angles of the rays are converged and reduced. In one embodiment, the plane of the plano-convex lens is close to the incident direction of the rays, and the convex surface of the plano-convex lens faces away from the incident direction of the rays. In other embodiments, the ray converging assembly 200 may be other lenses, which are selected according to the angle requirements.

[0064] After the angles of the rays are converged, step S230 or step S240 is performed, and one of them is selected, and both have the same technical effect, that is, the effect of uniform light is achieved.

[0065] In step S230, the light overlapping areas between adjacent light sources are intercepted by light.

[0066] See Figure 5It can be understood that after the light of the light source 100 is converged at least once or multiple times, the area of the illumination overlap region X before adjustment may be greatly reduced, but there may still be a small range of illumination overlap region X. For this reason, the illumination overlap region X of adjacent light sources 100 is intercepted to block the intersecting light that cannot change the light path, and to avoid the existence of the illumination overlap region X as much as possible.

[0067] See also Figure 1 , Figure 6 and Figure 7 In order to remove the overlapping illumination area X, in one embodiment, the overlapping illumination area X corresponding to the intersection angle of the initial divergence angle O of the light of adjacent light sources 100 after convergence is determined; a light intercepting member 300 is set at a preset position of the overlapping illumination area X to intercept the light corresponding to the overlapping illumination area X.

[0068] Understandably, see Figure 6 and Figure 8 After the initial divergence angle O of the light is converged, the divergence angle of the light is converged and reduced, but it still does not reach 0° (parallel to the optical axis), that is, the light is still divergent, then inevitably, the light from the two adjacent light sources 100 still intersects. It can be understood that there must be an intersection point at a certain distance between two beams of light from adjacent light sources, and there will be a corresponding light intersection point G and an intersection angle. It can be understood that the light in the area corresponding to the intersection angle has an illumination overlap area X. By setting a light interceptor 300 in the illumination overlap area X, the light in this area can be intercepted to prevent the light in this area from irradiating the screen 400, thereby avoiding the problem of increased superposition of the light intensity corresponding to the transmission of the local part of the screen 400.

[0069] Further, see Figure 5 and Figure 6 In order to avoid intercepting the light in the non-illumination overlapping area X, the preset position of the light interceptor 300 is set at the position of the intersection G of the light of two adjacent light sources 100, and the cross-sectional area of a single light interceptor 300 corresponds to the cross-sectional area of the angle of the light of the two adjacent light sources 100 after convergence. Such a setting can avoid intercepting the light in the non-illumination overlapping area X while ensuring the interception of the light in the illumination overlapping area X. In one of the embodiments, a corresponding number of light interceptors 300 are set according to the number of intersection positions of the light sources 100. Thereby ensuring that the illumination overlapping area X generated by the intersection of the light of each two adjacent light sources 100 can be intercepted and removed by the light interceptor 300. In one of the embodiments, the light interceptor 300 can be an aperture.

[0070] After intercepting the light in the overlapping illumination area X, in order to avoid the phenomenon that some light cannot be irradiated to the screen 400, that is, to avoid causing a part of the screen 400 to have no light irradiation, in one embodiment, the distance between the screen 400 and the light focusing component 200 does not exceed a preset threshold. In one embodiment, the optical path of the remaining normal light after intercepting the light is predetermined, the irradiation point of the light on the screen 400 is determined, and the maximum distance between the screen 400 and the light focusing component 200 is determined according to the position of the irradiation point, that is, the preset threshold is determined, so as to ensure that every position of the screen 400 can be irradiated by light and will not be overlapped.

[0071] Step S240: using a fly-eye lens to perform light homogenization on the angle-converged light.

[0072] See also Figure 9 and Figure 10 In the related art, the fly-eye lens 500 is formed by combining two groups of small lens arrays, the focus of each small unit lens in the first group of fly-eye lens 500 array coincides with the center of the corresponding small unit lens in the second group of fly-eye lens 500 array, and the optical axes of the two groups of fly-eye lenses 500 coincide one by one. Through the fly-eye lens 500, the light after the convergence angle can be further homogenized.

[0073] Furthermore, in one embodiment, a condenser 600 is placed behind the second group of fly-eye lenses 500, and the aperture of the condenser 600 corresponds to the area of the screen 400. Through the condenser 600, the light is evenly gathered and irradiated to the screen 400, thereby forming a uniform lighting system.

[0074] In summary, the method for adjusting the light source of the 3D printer of this embodiment first converges the light at least once to reduce the divergence angle of the light as much as possible and reduce the area of the overlapping illumination area X; on this basis, further homogenization is performed, and the homogenization can be performed in different ways, including but not limited to interception by the light interceptor 300 or homogenization by the compound eye lens 500. Finally, the collimation and homogenization of the light irradiated to the screen 400 achieve the desired effect, thereby improving the final molding size accuracy of the object to be molded and improving the printing quality.

[0075] In order to further illustrate the method for adjusting the light source of the 3D printer of the present application, the following takes the LED light source and the LCD screen as an example, and combines the attached Figures 5 to 8 Make an introduction.

[0076] In one embodiment, see Figure 5, assume that the light of an 8×8 array of LED light sources is adjusted. The divergence half-angle of each LED light source is approximately 80°. A first light beam converging member 210, i.e., a first plano-convex lens, is disposed at a very short distance in the light emission direction of each LED light source. Its purpose is to perform the first step of converging the divergence angle of the LED, and the first converging angle E after convergence, i.e., the divergence half-angle, is within approximately 30°. Then, a second light beam converging member 220, i.e., a second plano-convex lens, is added at an appropriate distance on one side of the outgoing light of the first light beam converging member 210. Its purpose is to further adjust the divergence angle of the light, so that the second converging angle F, i.e., the divergence half-angle, is converged to an angle range of 8° or even smaller, thereby completing the shaping adjustment of the collimation of the light. At the same time, aspherical designs can be adopted on the convex surfaces of the lenses 1 and 2. Its purpose is to control the beam uniformity without changing the collimation, and ensure the uniformity of the outgoing light.

[0077] As Figure 5 shown, the area between points M and N is the light overlapping area X, and the light intensity in this area will be higher than that in the surrounding non-overlapping areas. As Figure 6 and Figure 7 shown, in the light overlapping area X, a light intercepting member 300 with a high absorption rate for a specific wavelength, i.e., a diaphragm, is disposed. Taking a divergence half-angle of 3° as an example, in order to achieve 100% interception of the light in the light overlapping area X and ensure that each position of the screen 400 can receive light, the height of the best diaphragm cannot exceed the positions corresponding to points A and B in the figure, otherwise the situation as Figure 8 shown will occur. If the diaphragm is disposed at the positions corresponding to points C and D, some light beams within 3° will be intercepted; if the diaphragm is disposed at the positions C' and D', the light in the overlapping area between greater than 3° and less than 8° will not be intercepted. In order to intercept the light between the angles where points A and B are located and ensure that only the light within a divergence half-angle of less than 3° can directly irradiate the LCD screen. Therefore, the diaphragm needs to be placed at the following positions between the AB angles, such as Figure 6 the positions shown by points C and D in. At this time, only the light within a divergence half-angle of less than 3° of the light emitted by the LED light source will reach the LCD screen, ensuring that the light has a high collimation. And through the adjustment and shaping of the light angles of the first plano-convex lens and the second plano-convex lens, it can be ensured that the light within 3° has a uniformity of 90% and higher, thereby greatly improving the overall uniformity of the light on the screen 400.

[0078] Furthermore, the position of the LCD screen cannot be lower than the height of point P, otherwise there will be an area of the screen 400 that cannot be irradiated by light. Therefore, in practical applications, it is necessary to strictly control so that the LCD screen is just at or slightly higher than the position of point P, but the error should be less than 0.5 mm. That is, the spacing distance between the LCD screen and the light beam converging assembly 200 does not exceed the preset threshold.

[0079] Corresponding to the embodiment of the method for adjusting the light rays of the aforementioned 3D printer, refer to Figure 7 , the present application also provides an adjusting device for the light rays of a 3D printer, which includes: a light source 100 and a light beam converging component 200, wherein: the light beam converging component 200 is arranged on one side of the emitted light rays of the light source 100 and is preset at a distance close to the light source 100, and the light beam converging component 200 is used to converge the initial divergence angle O of the light source 100.

[0080] In the adjusting device of the present application, by using the light beam converging component 200 to adjust the divergence angle of the light rays, the initial divergence direction of the light rays is changed, and then the collimation degree and evenness degree of the light rays of the light source 100 are adjusted, thereby improving the forming dimension accuracy of the object to be formed in 3D printing and improving the printing quality.

[0081] Refer to Figure 5 , in one embodiment, when the number of light sources 100 is multiple, each light source 100 has a corresponding arrangement position. According to the arrangement position of the light source 100, the position of the light beam converging component 200 is correspondingly set. It can be understood that the angular convergence of the light rays is not limited to one-time convergence. On this basis, in one embodiment, the light beam converging component 200 includes a plurality of first light beam converging members 210 and a plurality of second light beam converging members 220, wherein the first light beam converging members 210 are arranged on one side of the emitted light rays of the light source 100 and are spaced from the light source 100 by a first preset distance; the first light beam converging members 210 are arranged on the side of the first light beam converging members 210 facing away from the light source 100 and are spaced from the first light beam converging members 210 by a second preset distance. That is, the light rays are first angularly converged by the plurality of first light beam converging members 210, and then secondarily angularly converged by the plurality of second light beam converging members 220. In one embodiment, the structural dimensions of the second light beam converging members 220 are different from those of the first light beam converging members 210. It can be understood that the light-transmitting cross-section of the light beam converging member farther away from the light source 100 is larger to correspond to the larger irradiation range of the light rays farther away. By analogy, in other embodiments, the light beam converging component 200 of the present application may further include a plurality of third light beam converging members, and the third light beam converging members are arranged on the light-emitting side of the second light beam converging members 220. The position and structural dimensions of the third light beam converging members are adjusted with reference to the second light beam converging members 220, which will not be elaborated here. In one embodiment, the light beam converging component 200 includes multiple groups of plano-convex lenses, the number of each group of plano-convex lenses corresponds to the number of light sources 100, and each plano-convex lens is correspondingly arranged with the corresponding light source 100. In one embodiment, the plane of the plano-convex lens is close to the incident direction of the light rays, and the convex surface of the plano-convex lens faces away from the incident direction of the light rays, so that the light rays are converged and gathered through the plano-convex lens.

[0082] Refer toFigure 6 In one embodiment, the adjusting device further includes a light intercepting member 300. In one embodiment, the light intercepting member 300 may be a diaphragm. In one embodiment, the light intercepting member 300 is disposed at the position where the light intersection point G of two adjacent light sources 100 is located, and the cross-sectional area of the light intercepting member 300 corresponds to the cross-sectional area of the included angle of the light rays of two adjacent light sources 100 after being converged.

[0083] See 6 and Figure 11 In one embodiment, the adjusting device further includes a blue light blocking film 700, and the blue light blocking film 700 is used to be laid on one side of the outgoing light of the screen 400. In one embodiment, the blue light blocking film 700 can absorb blue light with a wavelength of 420 nm to 450 nm. It can be understood that when the screen 400 is a black-and-white monochrome screen, its contrast ratio is relatively lower than that of a color screen. By providing the blue light blocking film 700, a certain blue light intensity after the light source 100 penetrates through the black area of the screen 400 can be absorbed, thereby improving the purple light contrast ratio of the screen 400, and then enabling the object printed through the black-and-white monochrome screen to reach the designed size and improving the printing accuracy.

[0084] See Figure 6 In one embodiment, the adjusting device further includes a non-rainbow film 800, and the non-rainbow film 800 is laid on one side of the outgoing light of the screen 400. In the related art, the non-rainbow film 800 is prepared by adding a non-rainbow solvent coating on a three-layer PET protective film substrate. By providing the non-rainbow film 800, the common problem of rainbow patterns in optical films is solved, and the appearance ornamental property of the protective film and the light transmittance of the protective film are improved. This protective film not only performs excellently in optical performance, but also does not generate bubbles and performs superiorly on the scratch-resistant treatment layer, and is suitable for the protection of various LCD screens.

[0085] Regarding the device in the above embodiments, the specific manners in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated herein again.

[0086] In one embodiment, the present application further provides a 3D printer, which includes an adjusting device for the light of the light source of the 3D printer in any of the above embodiments. In the 3D printer of the present application, the collimation degree and the uniform light degree of the light of the light source are adjusted and optimized through the adjusting device, greatly improving the product printing accuracy and the product printing quality.

[0087] The solutions of the present application have been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the specification are not necessarily essential to the present application. Additionally, it can be understood that the steps in the method embodiments of the present application can be adjusted, combined, and deleted according to actual needs, and the modules in the device embodiments of the present application can be combined, divided, and deleted according to actual needs.

[0088] The various embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, the practical application, or the improvement of the technology in the market, or to enable other ordinary skilled persons in the technical field to understand the embodiments disclosed herein.

Claims

1. A method for adjusting light source light of a 3D printer, characterized in that: The multiple light sources are arranged in an array, and the initial divergence angles of the light from the multiple light sources are determined; According to the initial divergence angle, a light converging component is arranged in an area at a preset distance close to the light source to converge the initial divergence angle of the light; Intercepting light in the overlapping area of illumination of adjacent light sources, including: Determine the illumination overlap area corresponding to the intersection angle after the initial divergence angles of the light rays of the adjacent light sources are converged; A light intercepting member is arranged at a preset position of the illumination overlapping area to intercept the light corresponding to the illumination overlapping area.

2. The method according to claim 1, characterized in that The determining of the initial divergence angles of the light rays from the plurality of light sources comprises: According to the arrangement position of each of the light sources, an initial divergence angle of light from each of the light sources is determined.

3. The method according to claim 1, characterized in that, The method of setting a light converging component in an area close to the light source at a preset distance according to the initial divergence angle to converge the initial divergence angle of the light comprises: According to the initial divergence angle, a first light converging member is arranged in an area close to the light source at a first preset distance to change the initial divergence angle of the light to form a first converging angle; According to the first focusing angle, a second light focusing element is disposed in an area at a second preset distance close to the first light focusing element to change the first focusing angle to form a second focusing angle.

4. An adjustment device for the adjustment method of the light source light of the 3D printer according to any one of claims 1 to 3, characterized in that, It includes a light source and a light focusing component, wherein: The light-gathering component is disposed on one side of the outgoing light of the light source and is close to the light source at a preset distance, and the light-gathering component is used to converge the initial divergence angle of the light source; There are multiple light sources, and the multiple light sources are arranged in an array; The adjusting device also includes a light intercepting member, which is arranged at the intersection of the light rays of two adjacent light sources, and the cross-sectional area of the light intercepting member corresponds to the cross-sectional area of the angle of light rays of the two adjacent light sources after convergence.

5. The device according to claim 4, characterized in that: The light collecting component includes a plurality of first light collecting components and a plurality of second light collecting components, wherein the first light collecting component is arranged on a side of the outgoing light of the light source and is spaced apart from the light source by a first preset distance; the first light collecting component is arranged on a side of the first light collecting component away from the light source and is spaced apart from the first light collecting component by a second preset distance.

6. The device according to claim 4, characterized in that: The light focusing component includes a plurality of groups of plano-convex mirrors, the number of the plano-convex mirrors in each group corresponds to the number of the light sources, and each plano-convex mirror is arranged corresponding to the corresponding light source.

7. A 3D printer, characterized in that: A device for adjusting light source light of a 3D printer comprising any one of claims 4 to 6.

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