CN214872715U - Large-size photocuring 3D printer light source - Google Patents
Large-size photocuring 3D printer light source Download PDFInfo
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- CN214872715U CN214872715U CN202121049493.XU CN202121049493U CN214872715U CN 214872715 U CN214872715 U CN 214872715U CN 202121049493 U CN202121049493 U CN 202121049493U CN 214872715 U CN214872715 U CN 214872715U
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Abstract
The invention discloses a large-size photocuring 3D printer light source, which comprises a light source, a collimating lens, a focusing lens, a homogenizing sheet, a spatial filter, a free-form surface lens, a Fresnel collimating lens and an illuminating surface which are sequentially arranged in a laminated manner, wherein the light source comprises lamp beads arranged in an array manner, so that the total power of the light source can be improved, the illumination of a large-target-surface LCD screen is realized, and the quality of light beams is improved. The secondary processing scheme of the light beam is adopted, namely the collimated light beam is gathered, homogenized and spatially filtered, the light beam after secondary processing forms a new extended light source at the spatial filtering position, the light source has better light intensity distribution, the light field homogenization and the light spot shape control of the light beam are conveniently carried out by a free-form surface lens, and finally the light beam collimation is carried out by a Fresnel lens, so that the collimation degree of the light beam can be controlled within 5 degrees.
Description
Technical Field
The invention relates to the field of lighting equipment of large-size photocuring 3D printers, in particular to a large-size photocuring 3D printer light source.
Background
The 3D printer adopts ultraviolet irradiation photosensitive resin, solidification shaping. The photosensitive resin is sensitive to the intensity of ultraviolet light during the molding process, so that it is very important to obtain uniform and highly collimated ultraviolet light beams. In large-size photocuring 3D printing, it is necessary to obtain an irradiation area in a large-size range to obtain a large-size 3D printing operation, for example, printing a large-size object such as a large-size apparatus like a building, an engineering machinery part, and the like. How to obtain better uniformity, collimation and energy required by curing while 3D printing large-size objects is one of the difficulties faced in large-size photocuring 3D printing. At present, most of 3D printers for large-size printing adopt an ultraviolet LED array direct illumination mode, and in the large-size 3D printing, in order to meet the printing in a large-size range, light beams need to provide large power and quantity, so that the problems of large divergence angle, weak light intensity, low light energy utilization rate and the like of the illumination light beams exist.
Disclosure of Invention
The invention provides a large-size photocuring 3D printer light source, and aims to solve the problems that the existing 3D printing technology cannot obtain better uniformity, collimation and energy required by curing at the same time when facing large-size photocuring 3D printing work.
According to the embodiment of the application, the large-size photocuring 3D printer light source comprises a light source, a collimating lens, a focusing lens, a homogenizing sheet, a spatial filter, a free-form surface lens, a Fresnel collimating lens and an illumination surface which are sequentially arranged, wherein light emitted by the light source sequentially passes through the collimating lens, the focusing lens, the homogenizing sheet, the spatial filter, the free-form surface lens and the Fresnel collimating lens and then irradiates the illumination surface; the light source comprises a plurality of lamp beads, the number of the collimating lenses is multiple, the number of the lamp beads and the number of the collimating lenses are the same, one collimating lens covers one lamp bead, and the plurality of lamp beads are arranged in an array mode.
Preferably, the collimating lens is of an aspheric structure.
Preferably, the focusing lens is a spherical lens or an aspherical lens.
Preferably, a frosting layer is arranged on one side of the homogenizing plate, which faces away from the focusing lens, and the homogenizing plate is a glass plate.
Preferably, the spatial filter is a circular or rectangular structure.
Preferably, the Fresnel lens system further comprises a shell, and the light source, the collimating lens, the focusing lens, the homogenizing plate, the spatial filter, the free-form surface lens, the Fresnel collimating lens and the illumination surface are clamped and positioned on the shell in sequence.
Preferably, the shell is correspondingly provided with a plurality of positioning parts, and the light source, the collimating lens, the focusing lens, the homogenizing sheet, the spatial filter, the free-form surface lens, the Fresnel collimating lens and the illumination surface are respectively abutted against the positioning parts; every location portion is outside bellied sliding block structure, is equipped with inside sunken groove structure on every sliding block.
The invention also provides an illumination method of the large-size photocuring 3D printer, which comprises the following steps: step S1: based on an original light beam emitted by a light source, carrying out collimation treatment on the original light beam to obtain a collimated light beam; step S2: focusing the collimated beam; step S3: homogenizing the focused light spots; step S4: carrying out spatial filtering on the homogenized light beam, and controlling the size of a focused light spot; step S5: the light beam after spatial filtering passes through a lens to be subjected to secondary processing; and step S6: the light beam passing through the lens is collimated and irradiated into the illumination surface.
The illumination method and the light source of the large-size photocuring 3D printer have the following beneficial effects:
through light source, collimating lens, focusing lens, homogenizing sheet, spatial filter, free-form surface lens, fresnel collimating lens and the illumination face that the stromatolite set up in proper order, the light that the light source set up through the array, shines after passing collimating lens, focusing lens, homogenizing sheet, spatial filter, free-form surface lens, fresnel collimating lens in proper order on the illumination face for this equipment can improve the total power of light source, realizes the illumination of big target surface LCD screen, in order to improve the quality of light beam simultaneously. The secondary processing scheme of the light beam is adopted, namely the collimated light beam is gathered, homogenized and spatially filtered, the light beam after secondary processing forms a new extended light source at the spatial filtering position, the light source has better light intensity distribution, the light field homogenization and the light spot shape control of the light beam are conveniently carried out by a free-form surface lens, and finally the light beam collimation is carried out by a Fresnel lens, so that the collimation degree of the light beam can be controlled within 5 degrees. Meanwhile, in the working requirement of large-size photocuring 3D printing, stray light caused by an array lens or a light source can be effectively controlled in a spatial filtering mode, and the illumination quality of an illumination light beam is improved. Furthermore, the array light source and the free-form surface lens are combined, so that rectangular light spot illumination is realized, the energy of illumination light spots is improved, and the problem of insufficient energy of large-size photocuring 3D printing is effectively solved. And furthermore, the array light source, the free-form surface lens and the Fresnel are combined, so that rectangular light spot illumination with high collimation degree is realized, and the problem of insufficient light beam collimation degree caused by overlarge surface of the 3D printing ruler is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a large-sized photocuring 3D printer light source according to a first embodiment of the invention.
Fig. 2 is a light spot data diagram of the irradiation effect of the light source of the large-size photo-curing 3D printer according to the first embodiment of the present invention.
Fig. 3 is another light spot data diagram of the illumination effect of the light source of the large-size photo-curing 3D printer according to the first embodiment of the present invention.
Description of reference numerals:
1. a large-size photocuring 3D printer light source;
11. a light source; 12. a collimating lens; 13. a focusing lens; 14. homogenizing tablets; 15. a spatial filter; 16. a free-form surface lens; 17. a Fresnel collimating lens; 18. and (5) illuminating the surface.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.
Referring to fig. 1, a first embodiment of the present invention discloses a large-size light-cured 3D printer light source 1, which includes a light source 11, a collimating lens 12, a focusing lens 13, a homogenizing sheet 14, a spatial filter 15, a free-form surface lens 16, a fresnel collimating lens 17, and an illumination surface 18, which are sequentially arranged, where light emitted from the light source 11 sequentially passes through the collimating lens 12, the focusing lens 13, the homogenizing sheet 14, the spatial filter 15, the free-form surface lens 16, and the fresnel collimating lens 17, and then irradiates onto the illumination surface 18, so as to obtain a uniform ultraviolet light beam with high collimation.
The light source 11 includes a plurality of lamp beads, the number of collimating lens 12 is a plurality of, just the lamp bead reaches the same number of collimating lens 12, one collimating lens 12 covers on one the lamp bead, it is a plurality of the lamp bead array sets up.
It can be understood that the lamp beads are luminous members which can emit light, and can be set as LED lamp beads for example.
It can be understood that a plurality of lamp beads arranged in an array form an irradiation range for large-size photocuring 3D printing, and in the formed irradiation surface in the large-size range, divergent light beams need to be collimated and homogenized to obtain large-size photocuring light beams meeting requirements.
The collimating lens 12 is of an aspheric structure, and after the light beam of a single lamp bead passes through the single collimating lens 12, the light beam is in a collimated state or an approximately collimated state, that is, the light beams emitted by the light source are collimated one by one based on the collimating lens 12.
The focusing lens 13 is a spherical lens or an aspheric lens, and the focusing lens 13 mainly aims to focus the collimated light spots.
The homogenizing plate 14 is a glass plate, the homogenizing plate 14 homogenizes the light beam focused by the focusing lens 13, and the frosting layer homogenizes the incident light beam.
It is understood that the spatial filter 15 has a circular or rectangular structure, and the specific shape is determined by the array arrangement of the light sources 11.
Spatial filtering is an image enhancement method that employs filtering. The theoretical basis is spatial convolution and spatial correlation. The purpose is to improve image quality, including removing high frequency noise and interference, and enhancing image edge, enhancing linearity and deblurring. There are low-pass filtering (smoothing), high-pass filtering (sharpening), and band-pass filtering. The processing methods include both computer processing (digital filtering) and optical information processing. In this embodiment, the spatial filter 15 is a light beam filter based on optical information processing, and is designed to filter out the problem of stray light caused by the edge of the array collimating lens 12, and control the size of the focused light spot, that is, make the edge of the irradiation range formed by the focused light spot smoother, and make the formed light more uniform.
The free-form surface lens 16 is a free-form surface type, and illumination of rectangular light spots is realized according to the size of the illumination surface 18 as required, that is, the size of a light beam irradiation area is controlled by controlling the distance between the free-form surface lens 16 and the Fresnel collimating lens 17, and the free-form surface lens 16 can perform secondary treatment on the light beam after filtering treatment to be emitted as a new light source, and the new light source has more uniform characteristics after treatment.
The fresnel collimating lens 17 is of a fresnel surface type, and mainly collimates the light beam, and the material is glass or plastic, that is, the light beam is collimated for the second time, so that a new light source formed after passing through the free-form surface lens 16 is collimated.
The illuminating surface 18 is a print screen LCD, and the size of the illuminating surface 18 is determined according to the size of the LCD screen.
It is understood that, in this embodiment, the light source 11, the collimating lens 12, the focusing lens 13, the homogenizing plate 14, the spatial filter 15, the free-form lens 16, the fresnel collimating lens 17, and the illumination surface 18 may be integrated into a light-emitting device of a 3D printer, and used as a light-emitting head of the 3D printer.
It can be understood that, in this embodiment, the large-size light-curing 3D printer light source further includes a housing (not shown), the light source 11, the collimating lens 12, the focusing lens 13, the homogenizing plate 14, the spatial filter 15, the free-form surface lens 16, the fresnel collimating lens 17, and the illuminating surface 18 are sequentially clamped and positioned on the housing, the housing is correspondingly provided with a plurality of positioning portions, the light source 11, the collimating lens 12, the focusing lens 13, the homogenizing plate 14, the spatial filter 15, the free-form surface lens 16, the fresnel collimating lens 17, and the illuminating surface 18 respectively abut against the positioning portions, and the positioning portions may be an inwardly recessed annular groove structure.
Optionally, as an embodiment, each positioning portion is a sliding block structure protruding outward, and each sliding block is provided with an inward concave groove structure, that is, each positioning portion is used to position one lens, and a user can adjust the distance between the light source 11, the collimating lens 12, the focusing lens 13, the homogenizing plate 14, the spatial filter 15, the free-form surface lens 16, the fresnel collimating lens 17 and the illumination surface 18 based on the positioning portions, so as to achieve the effects of adjusting the size of the outgoing light beam, and adjusting the focal length and the size of the light spot.
It is understood that, in other embodiments, the light source 11, the collimating lens 12, the focusing lens 13, the homogenizing plate 14, the spatial filter 15, the free-form surface lens 16, the fresnel collimating lens 17, and the illumination surface 18 provided by the present invention may also be provided with positioning members of other structures to position the relative positions and sizes between the plurality of lenses and the light source, for example, a positioning member of a cylindrical structure may be provided, and an opening may be provided on the side surface to facilitate the user to pull out the lenses from the side surface for replacement, etc., as long as the plurality of lenses can be positioned, which is not limited herein.
Referring to fig. 2 and 3, the light panel data graphs shown in fig. 2 and 3 can be obtained by the lighting apparatus according to the first embodiment of the present invention, and it can be seen that the light beam distribution is more uniform and has better light intensity distribution.
It can be understood that the uniformity of the irradiation light spot is better than 90%, the utilization rate of the light source is higher than 50%, the angle of the light beam is smaller than 5 degrees, and the problem of large-size photocuring 3D printing illumination is solved. Through the effective control to output beam shape, energy size and collimation degree, improved resin curing forming's precision, reduced curing time, improved the productivity of 3D printing.
The second embodiment of the present invention provides an illumination method for a large-size photocuring 3D printer, which adopts the light source for the large-size photocuring 3D printer provided by the first embodiment, and specifically includes the following steps:
step S1: the original light beam is emitted based on the light source, and the original light beam is collimated to obtain a collimated light beam.
Step S2: focusing the collimated beam.
Step S3: and homogenizing the focused light spots.
Step S4: and carrying out spatial filtering on the homogenized light beam to control the size of a focused light spot.
Step S5: the spatially filtered beam is passed through a lens for secondary processing. And
step S6: the light beam passing through the lens is collimated and irradiated into the illumination surface.
It is understood that in step S1, the original light beam emitted from the light source 11 is first collimated by the collimating lens 12.
It is understood that in step S2, the collimated light beam is focused to reduce the area of the light beam for subsequent processing of the light beam.
It can be understood that, in step S4, the homogenized light beam is spatially filtered based on the spatial filter 15, so that stray light introduced by the array lens or the light source can be effectively controlled, and the illumination quality of the illumination light beam can be improved.
It is understood that, in step S5, the filtered light beam passes through the free-form surface lens 16 again to be used as a new light source, i.e. the original light beam is subjected to the collimation-focusing-homogenization-filtering process of steps S1 to S4 and then is used as a new light source again, and the secondary collimation process is performed in step S6 and finally the light beam is irradiated to the illumination surface 18 to obtain the illumination effect meeting the requirement.
The illumination method and the light source of the large-size photocuring 3D printer have the following beneficial effects:
through light source, collimating lens, focusing lens, homogenizing sheet, spatial filter, free-form surface lens, fresnel collimating lens and the illumination face that the stromatolite set up in proper order, the light that the light source set up through the array, shines after passing collimating lens, focusing lens, homogenizing sheet, spatial filter, free-form surface lens, fresnel collimating lens in proper order on the illumination face for this equipment can improve the total power of light source, realizes the illumination of big target surface LCD screen, improves the quality of light beam simultaneously. The secondary processing scheme of the light beam is adopted, namely the collimated light beam is gathered, homogenized and spatially filtered, the light beam after secondary processing forms a new extended light source at the spatial filtering position, the light source has better light intensity distribution, the light field homogenization and the light spot shape control of the light beam are conveniently carried out by a free-form surface lens, and finally the light beam collimation is carried out by a Fresnel lens, so that the collimation degree of the light beam can be controlled within 5 degrees. Meanwhile, in the working requirement of large-size photocuring 3D printing, stray light caused by an array lens or a light source can be effectively controlled in a spatial filtering mode, and the illumination quality of an illumination light beam is improved. Furthermore, the array light source and the free-form surface lens are combined, so that rectangular light spot illumination is realized, the energy of illumination light spots is improved, and the problem of insufficient energy of large-size photocuring 3D printing is effectively solved. And furthermore, the array light source, the free-form surface lens and the Fresnel are combined, so that rectangular light spot illumination with high collimation degree is realized, and the problem of insufficient light beam collimation degree caused by overlarge surface of the 3D printing ruler is solved.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A large-size photocuring 3D printer light source is characterized by comprising a light source, a collimating lens, a focusing lens, a homogenizing sheet, a spatial filter, a free-form surface lens, a Fresnel collimating lens and an illumination surface which are sequentially arranged, wherein light emitted by the light source sequentially passes through the collimating lens, the focusing lens, the homogenizing sheet, the spatial filter, the free-form surface lens and the Fresnel collimating lens and then irradiates the illumination surface;
the light source comprises a plurality of lamp beads, the number of the collimating lenses is multiple, the number of the lamp beads and the number of the collimating lenses are the same, one collimating lens covers one lamp bead, and the plurality of lamp beads are arranged in an array mode.
2. The large-sized photocuring 3D printer light source of claim 1, wherein: the collimating lens is of an aspheric structure.
3. The large-sized photocuring 3D printer light source of claim 1, wherein: the focusing lens is a spherical lens or an aspheric lens.
4. The large-sized photocuring 3D printer light source of claim 1, wherein: and one side of the homogenizing plate, which is far away from the focusing lens, is provided with a frosting layer, and the homogenizing plate is a glass plate.
5. The large-sized photocuring 3D printer light source of claim 1, wherein: the spatial filter is of a circular or rectangular structure.
6. The large-sized photocuring 3D printer light source of claim 1, wherein: the light source, the collimating lens, the focusing lens, the homogenizing plate, the spatial filter, the free-form surface lens, the Fresnel collimating lens and the illumination surface are sequentially clamped and positioned on the shell.
7. The large-sized photocuring 3D printer light source of claim 6, wherein: the shell is correspondingly provided with a plurality of positioning parts, and the light source, the collimating lens, the focusing lens, the homogenizing sheet, the spatial filter, the free-form surface lens, the Fresnel collimating lens and the illumination surface are respectively abutted against the positioning parts;
every location portion is outside bellied sliding block structure, is equipped with inside sunken groove structure on every sliding block.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121049493.XU CN214872715U (en) | 2021-05-17 | 2021-05-17 | Large-size photocuring 3D printer light source |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121049493.XU CN214872715U (en) | 2021-05-17 | 2021-05-17 | Large-size photocuring 3D printer light source |
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| CN214872715U true CN214872715U (en) | 2021-11-26 |
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| CN202121049493.XU Active CN214872715U (en) | 2021-05-17 | 2021-05-17 | Large-size photocuring 3D printer light source |
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- 2021-05-17 CN CN202121049493.XU patent/CN214872715U/en active Active
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Denomination of utility model: A light source for large-size UV curing 3D printer Effective date of registration: 20220722 Granted publication date: 20211126 Pledgee: Shenzhen small and medium sized small loan Co.,Ltd. Pledgor: Shenzhen Intelligent Technology Co.,Ltd. Registration number: Y2022440020137 |
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