CN210309079U - High-efficient line scanning photocuring image device - Google Patents
High-efficient line scanning photocuring image device Download PDFInfo
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- CN210309079U CN210309079U CN201920870408.2U CN201920870408U CN210309079U CN 210309079 U CN210309079 U CN 210309079U CN 201920870408 U CN201920870408 U CN 201920870408U CN 210309079 U CN210309079 U CN 210309079U
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Abstract
The utility model relates to a high-efficiency line scanning photocuring imaging device, which comprises a frame, wherein a liquid tank is arranged above the frame, photosensitive resin is arranged in the liquid tank, a flexible transparent bottom is arranged at the bottom of the liquid tank, a linear module is arranged below the frame, a moving platform is arranged on the linear module, the moving direction of the moving platform is parallel to the longitudinal direction of the flexible transparent bottom, a support is arranged on the moving platform, a laser light source, a resonant micro-electromechanical reflector and a rigid narrow line width window are arranged on the support, light beams emitted by the laser light source just hit the resonant micro-electromechanical reflector, the deflection axis of the resonant micro-electromechanical reflector is parallel to the longitudinal direction of the flexible transparent bottom, and the rigid narrow-line-width window is vertically projected and superposed with the longitudinal central line of the flexible transparent bottom, rigid parts on two sides of the rigid narrow-line-width window are contacted with the flexible transparent bottom and elastically deformed and tensioned, and the window direction of the rigid narrow-line-width window is transversely consistent with that of the flexible transparent bottom.
Description
Technical Field
The utility model belongs to the technical field of 3D prints and specifically relates to a high-efficient line scanning photocuring image device.
Background
Photocuring three-dimensional forming is taken as a mainstream technology in the field of 3D printing, has the remarkable advantages of high forming speed, good surface quality and high detail precision, and is widely applied to the industries of dentistry, jewelry, automobiles and the like. Similar to the layer-by-layer forming principle of other 3D printing technologies, when the photocuring three-dimensional forming is carried out for single-layer curing, imaging elements such as a Liquid Crystal Display (LCD), a Digital Light Processor (DLP), an electromagnetic coil type scanning galvanometer and the like are adopted to pattern and image a light source with a specific wavelength onto the liquid level of photosensitive resin for selective exposure and curing. According to the difference of the positions of the imaging liquid level, the light curing can be divided into upper liquid level curing and lower liquid level curing; the former projects a pattern on the upper liquid level of photosensitive resin, the upper liquid level sinks into a liquid pool after being cured, and a new liquid level formed by liquid flow continues to be cured in the next layer, so that the method has the advantage that the cured layer does not need to be peeled off from the surfaces of other solids, but the upper liquid level is easily affected by wave disturbance and has high requirement on the precision of the liquid level; the latter applies a pattern to the bottom liquid surface of the transparent liquid pool, and the solidified lower liquid surface is attached to both the previously solidified layer and the bottom of the transparent liquid pool, and the solidified lower liquid surface needs to be peeled off from the bottom of the transparent liquid pool in order to continue to solidify the next layer. Compared with the upper liquid level mode, the lower liquid level light curing forming height is not influenced by the depth of a liquid pool, the upper surface of liquid shakes to not influence the curing process, the cured layer is high in flatness and limited by stripping force, and the lower liquid level light curing three-dimensional forming device is more applied to small and medium-sized light curing three-dimensional forming equipment.
On the other hand, the LCD adopts a light transmission shielding mode to realize patterned imaging, the light transmittance is low, the typical light energy utilization rate is only 4% -7%, and a large amount of light is intercepted inside the LCD, so that the problems of serious heating and display screen aging are caused. DLP adopts micromirror array reflection bypass mode to realize patterned imaging, and its light energy utilization rate is higher than LCD, but DLP is expensive, and the physical resolution is lower than LCD display, and the light that is reflected the bypass also causes considerable light energy waste. The electromagnetic coil type scanning galvanometer imaging technology adopts a deflection servo motor, controls a reflector through macroscopic mechanical motion, and further controls laser beams to scan and image vectorially, and the optical energy utilization rate is highest, but the scanning speed is low, and the imaging performance of complex patterns is low.
In addition, in order to reduce the difficulty of peeling, the conventional lower liquid level photo-curing technology generally adopts a flexible transparent film as a solid interface of a lower liquid level, and in order to flatly attach the cured lower liquid level to a cured layer, the lower liquid level must be supported on a rigid plane, so that a rigid flat glass substrate is generally arranged below the flexible transparent film of the conventional lower liquid level photo-curing equipment, which not only causes optical interferences such as reflection, refraction, ghost image and the like to the lower liquid level image, but also further weakens the light intensity finally acting on the lower liquid level. At present, a photocuring imaging technology with the advantages of economic and reasonable scheme, high physical resolution, high light energy utilization rate and strong imaging capability of complex patterns is also lacked in the field of photocuring three-dimensional forming.
SUMMERY OF THE UTILITY MODEL
The utility model discloses solve above-mentioned prior art's shortcoming, provide a scheme economic rationality, physical resolution is high, light energy utilization rate is high, complicated pattern imaging ability is strong high-efficient line scanning photocuring imaging device and method.
The utility model provides a technical scheme that its technical problem adopted: a high-efficiency line scanning photocuring imaging device comprises a frame, a liquid tank is arranged above the frame, photosensitive resin is arranged in the liquid tank, a flexible transparent bottom is arranged at the bottom of the liquid tank, a linear module is arranged below the frame, a moving platform is arranged on the linear module, the moving direction of the moving platform is parallel to the longitudinal direction of the flexible transparent bottom, a support is arranged on the moving platform, a laser light source, a resonant micro-electromechanical reflector and a rigid narrow line width window are arranged on the support, light beams emitted by the laser light source are just hit on the resonant micro-electromechanical reflector, the deflection axis of the resonant micro-electromechanical reflector is parallel to the longitudinal direction of the flexible transparent bottom, and the rigid narrow-line-width window is vertically projected and superposed with the longitudinal central line of the flexible transparent bottom, rigid parts on two sides of the rigid narrow-line-width window are contacted with the flexible transparent bottom and elastically deformed and tensioned, and the window direction of the rigid narrow-line-width window is transversely consistent with that of the flexible transparent bottom.
A high-efficiency line scanning photocuring imaging method comprises a laser light source, a resonant micro-electromechanical reflector, a rigid narrow line width window, a linear module, a flexible transparent bottom liquid tank and a scanning controller, wherein laser beams emitted by the laser light source are reflected by the resonant micro-electromechanical reflector and projected to the transverse direction of the flexible transparent bottom of the liquid tank to form scanning lines, and the scanning lines are positioned in the rigid narrow line width window; the rigid narrow line width window upwards extrudes the flexible transparent bottom of the liquid tank to ensure that the local part of the flexible transparent bottom is in a tensioned flat state; the relative position relation of the laser light source, the resonant micro-electromechanical reflector and the rigid narrow line width window is fixed and the laser light source, the resonant micro-electromechanical reflector and the rigid narrow line width window are jointly arranged on the linear module moving platform; the scanning controller is electrically connected with the laser light source, the resonant micro-electromechanical reflector and the linear module;
when single-line scanning imaging is carried out, the scanning controller sends out an excitation signal according to the resonance frequency of the micro-electromechanical reflector and applies the excitation signal to a driving mechanism of the resonant micro-electromechanical reflector through a signal line so as to enable the resonant micro-electromechanical reflector to enter a resonant reciprocating deflection state; the scanning controller calculates the pixel point position in a scanning line pointed by the laser beam in real time according to the deflection angle of the resonant micro-electromechanical reflector, outputs the brightness data of the pixel point from the row pixel data buffer area in an index manner, converts the brightness data into a brightness control signal and applies the brightness control signal to the laser source through a signal line;
when continuous line-by-line scanning imaging is carried out, the scanning controller sends out a displacement control signal, a linear module is applied through a signal line, and a linear module moving platform drives a laser light source, a resonant micro-electromechanical reflector and a rigid narrow line width window to carry out reciprocating scanning motion in the longitudinal direction of the flexible transparent bottom of the liquid tank; in the motion process, the linear module outputs a real-time position signal to the scanning controller, and the scanning controller calculates the corresponding row number of the current scanning line in the imaged pattern according to the real-time position of the linear module, further retrieves the pixel data of the corresponding row from the imaged pattern data, and refreshes the pixel data to a row pixel buffer area in real time; the scanning controller controls the laser light source to output corresponding line pixel patterns according to the line pixel buffer area data refreshed in real time; the linear module moving platform drives the laser light source, the resonant micro-electromechanical reflector and the rigid narrow line width window, and when the laser light source continuously passes through the imaging area of the flexible transparent bottom of the liquid tank, the imaged pattern is continuously projected and imaged to the flexible transparent bottom of the liquid tank pixel by pixel and line by line through the laser light beams.
The Micro Electro Mechanical System (MEMS) reflector of the utility model adopts MEMS manufacturing process, the reflector, the torsion beam and the driving mechanism are all manufactured by adopting wafer photoetching integration, the size of the reflector is small (typical value 3mm x 2.5mm), the rotary inertia is small, the natural oscillation frequency is stable, the amplitude and the frequency stability are high when the reflector works in a simple harmonic oscillation mode, the resonant frequency can reach more than 500 to 2800Hz, and more than 5000 lines are scanned by 1000 plus materials per second, the scanning controller of the utility model realizes pixel division on a scanning line by dividing the half cycle time corresponding to the forward and return movement of each resonant cycle, realizes pixel-by-pixel output by adjusting and controlling the brightness of a laser light source, therefore, the physical resolution of the scanning line is only related to the size of a laser facula and the time division granularity, the scanning of high resolution and resolution ratio is easy to realize self-defined scanning, under 200 mega master frequency, when the 500Hz resonant micro-electromechanical reflector is adopted, the line resolution of more than 100000 pixels can be realized, which is far superior to other display technologies.
The utility model discloses the moving platform of sharp module drives laser light source, resonant mode micro-electromechanical speculum and rigidity narrow linewidth window, realize line by line scanning formation of image, its direction of being listed as formation of image resolution ratio only with laser facula size, and sharp module position resolution ratio is relevant, the scanning range only is relevant with sharp module motion stroke, extension sharp module motion stroke, can extend line by line scanning's line number and longitudinal length, easily realize overlength scope scanning formation of image, and need not a plurality of imaging device's mechanical concatenation.
The utility model discloses a narrow line width window of rigidity and laser source, resonant mode micro-electromechanical speculum synchronous motion only with the flexible transparent end of cistern just by the local area tensioning of laser beam scanning, not only can guarantee the roughness of layer of solidifying, can cancel the rigidity flat glass substrate moreover, and then can eliminate flat glass and lead to the formation of image to disturb and the light decay to promote scanning accuracy and photocuring efficiency.
The rigid narrow-line-width window of the utility model has the advantages that when the rigid narrow-line-width window continuously advances for scanning, the flexible transparent bottom of the liquid tank in the area in front of the window is elastically deformed and tensioned, so that the window is flattened, the lower liquid level of the flattening area and the upper curing layer keep single-layer thickness, and the new curing layer and the upper curing layer in the line scanning area in the window can be reliably combined; the flexible transparent bottom of the liquid tank in the separation area behind the window is elastically reset, so that the line scanning curing part is stripped from the flexible transparent bottom of the liquid tank, the stripping mode is linear, and the stripping direction is consistent with the motion direction of the linear module.
The utility model discloses a high-efficient line scanning photocuring imaging method, liquid level planarization, line scanning solidification and linear stripping process under it all take place in the local region of the flexible transparent bottom of cistern that the narrow line width window of rigidity corresponds, and the flexible transparent bottom of cistern is in the local line scanning photocuring process, and the compressive force and the resin solidification shrinkage stress that bear to and the tensile stress of stripping process all are less than whole photocuring and whole face stripping mode; therefore, the service life of the flexible transparent bottom of the liquid tank is longer than that of the whole surface photocuring and whole surface stripping modes.
The laser beam emitted by the laser light source of the utility model is reflected by the resonant micro-electromechanical reflector and then directly imaged on the flexible transparent bottom of the liquid tank, no other intermediate links exist, and the energy utilization rate of the light source is high; the utility model discloses a laser light source is in the closed condition in the dark part region of formation of image, and laser light source work is in the switch pulse mode, and the energy consumption is low, long service life.
The utility model discloses a high-efficient line scanning photocuring image device and method, scheme economy is reasonable, physical resolution is high, light energy utilization is rateed highly, easily popularizes and applies in big breadth, high accuracy, high efficiency photocuring three-dimensional former.
Drawings
Fig. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
fig. 2 is a schematic view of a single-row scanning optical path according to an embodiment of the present invention;
fig. 3 is a schematic view of line-by-line scanning according to an embodiment of the present invention;
fig. 4 is a control signal connection diagram according to an embodiment of the present invention;
description of reference numerals: the device comprises a frame 1, a liquid tank 2, a flexible transparent bottom 3, a linear module 4, a moving platform 5, a support 6, a laser light source 7, a resonant micro-electromechanical reflector 8, a rigid narrow-line-width window 9, a scanning controller 10, a light beam 11, a normal plane 12, a reflected light beam 13, a laser spot 14, a single-line scanning pixel map 15, a front area 16, a superposition part 17, a solidified layer 18, a rear area 19 and a photocuring formed body 20.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
example (b): referring to fig. 1, a high-efficiency line scanning photocuring imaging device comprises a frame 1, a liquid tank 2 is arranged above the frame 1, photosensitive resin is arranged in the liquid tank 2, a flexible transparent bottom 3 is arranged at the bottom of the liquid tank 2, a linear module 4 is arranged below the frame 1, a moving platform 5 is arranged on the linear module 4, the moving direction of the moving platform 5 is parallel to the longitudinal direction of the flexible transparent bottom 3, a support 6 is arranged on the moving platform 5, a laser light source 7, a resonant micro-electromechanical mirror 8 and a rigid narrow line width window 9 are arranged on the support 6, a light beam 11 emitted by the laser light source 7 just hits the resonant micro-electromechanical mirror 8, the deflection axis of the resonant micro-electromechanical mirror 8 is parallel to the longitudinal direction of the flexible transparent bottom 3 and vertically projects and coincides with the longitudinal central line of the flexible transparent bottom 3, rigid parts at two sides of the rigid narrow line width window 9 are in contact with the flexible, the window direction of the rigid narrow linewidth window 9 is transversely consistent with that of the flexible transparent bottom 3.
A high-efficiency line scanning photocuring imaging method, as shown in figure 2, a light beam 11 emitted by a laser light source 7 is positioned in a normal plane 12 led out from a torsional axis of a resonant micro-electromechanical reflector 8, a reflected light beam 13 formed after being reflected by the resonant micro-electromechanical reflector 8 is emitted into a rigid narrow line width window 9, and a laser spot 14 is formed on a flexible transparent bottom 3, when the resonant micro-electromechanical reflector 8 performs continuous simple harmonic oscillation motion, the laser light source 7 adjusts the brightness of the light beam 11 in real time according to the deflection angle of the resonant micro-electromechanical reflector 8 and line pixel data buffer area data, the laser spot 14 scans transversely and repeatedly along the flexible transparent bottom 3, and a single-line scanning pixel graph 15 is formed at the part of the flexible transparent bottom 3 in the rigid narrow line width window 9;
as shown in fig. 3, the linear module 4 drives the laser light source 7, the resonant micro-electromechanical mirror 8 and the rigid narrow line width window 9 on the support 6 through the moving platform 5 to perform scanning motion along the longitudinal direction of the flexible transparent substrate 3, the front region 16 on the flexible transparent substrate 3 in front of the rigid narrow line width window 9 continuously enters the rigid narrow line width window 9, the overlapped part 17 of the flexible transparent substrate 3 at the overlapped part with the rigid narrow line width window 9 enters a tensioned and flattened state, the photosensitive resin on the surface layer is continuously exposed and cured by the single line scanning pixel diagram 15, and the cured layer 18 generated by exposure is subjected to the elastic reset action of the rear region 19 when the linear module moves to the rear region 19 of the flexible transparent substrate 3, is peeled from the rear region 19 of the flexible transparent substrate 3 and is attached to the lower surface of the previous photocured forming body 20; when the longitudinal scanning movement is continuously carried out, the processes of elastic tensioning and flattening, line scanning photocuring and elastic resetting and stripping are continuously repeated on the local part of the flexible transparent bottom 3 along the longitudinal direction.
Referring to fig. 4, the scan controller 10 is connected to the linear module 4, the scan controller 10 is connected to the laser source 7, and the scan controller 10 is connected to the resonant micro-electromechanical mirror 8. The scanning controller 10 sends out an electric excitation signal to the driving mechanism of the resonant micro-electromechanical mirror 8 to drive the driving mechanism to do simple harmonic oscillation motion; the scanning controller 10 sends out a brightness adjusting signal to the laser light source 7 according to the real-time deflection angle of the resonant micro-electromechanical reflector 8 and the data of the line pixel data buffer area, so as to realize pixel-by-pixel brightness control and obtain a line scanning pixel pattern; the scanning controller 10 sends a displacement signal to the linear module 4 according to the progressive scanning speed so as to realize longitudinal continuous progressive scanning motion; the scan controller 10 calculates the line number of the current line scan according to the longitudinal position signal fed back by the linear module 4, and refreshes the pixel data of the line corresponding to the imaging pattern to the line pixel data buffer area.
The utility model discloses a resonant mode micro-electromechanical speculum utilizes its stable amplitude and frequency under simple harmonic oscillation state, realizes the scanning of single-row line, through to the scanning of single-row line to and the division of the corresponding half cycle time of return motion, realizes the pixel division of scanning line, through locating the facula in the scanning line each pixel instantaneous luminance adjust in real time, realizes the pixel pattern formation of image of single-row scanning line; the utility model discloses the pixel resolution ratio of single-row scanning line only depends on laser facula size and time division granularity, reduces laser facula size, shortens time division granularity and can promote pixel resolution ratio.
The utility model adopts the linear module to drive the line scanning unit of the resonant micro-electromechanical reflector, realizes the imaging of the light-cured plane by utilizing the line-by-line scanning, the inter-line resolution only depends on the laser spot size and the linear module displacement resolution, the inter-line resolution of the imaging of the light-cured plane can be improved by reducing the laser spot size and improving the linear module displacement resolution; and the stroke of the linear module is prolonged, so that a longer light-cured plane imaging size can be obtained.
The utility model adopts the rigid narrow line width window which moves synchronously with the line scanning unit of the resonant micro-electromechanical reflector to realize the local tensioning and flattening of the flexible transparent bottom of the liquid tank by line scanning, and after the rigid narrow line width window is removed, the elasticity of the flexible transparent bottom of the liquid tank resets to realize the linear stripping of the line scanning light curing layer; the utility model discloses flexible transparent end's operating stress is little, and long service life more is applicable to the wide range photocuring and uses.
The utility model discloses during rigidity narrow line width window and the flexible transparent end relative movement in cistern, can adopt the shown sliding friction mode of this embodiment, do and adopt the rolling friction mode.
The invention adopts simple harmonic oscillation motion of the resonant micro-electromechanical reflector, progressive scanning motion of the linear module and laser spot brightness control synchronous with the two motions in real time to realize photocuring two-dimensional scanning imaging, and has fixed scanning motion mode, no relation with pattern complexity and high imaging efficiency.
In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.
Claims (3)
1. The utility model provides a high-efficient line scanning photocuring image device, includes frame (1), characterized by: a liquid tank (2) is arranged above a frame (1), photosensitive resin is arranged in the liquid tank (2), a flexible transparent bottom (3) is arranged at the bottom of the liquid tank (2), a linear module (4) is arranged below the frame (1), a moving platform (5) is arranged on the linear module (4), the moving direction of the moving platform (5) is parallel to the longitudinal direction of the flexible transparent bottom (3), a support (6) is arranged on the moving platform (5), a laser light source (7), a resonant micro-electromechanical reflector (8) and a rigid narrow line width window (9) are arranged on the support (6), a light beam (11) emitted by the laser light source (7) is just hit on the resonant micro-electromechanical reflector (8), the deflection axis of the resonant micro-electromechanical reflector (8) is parallel to the longitudinal direction of the flexible transparent bottom (3) and is vertically projected and superposed with the longitudinal central line of the flexible transparent bottom (3), and rigid parts at two sides of the rigid narrow line width window (9) are in contact with the flexible transparent bottom (3) and are elastically The shape is tensioned, and the window direction of the rigid narrow line width window (9) is transversely consistent with that of the flexible transparent bottom (3).
2. The high efficiency line scan photocuring imaging device of claim 1, wherein: the linear module (4), the laser light source (7) and the resonant micro-electromechanical reflector (8) are respectively connected with the scanning controller (10).
3. The high efficiency line scan photocuring imaging device of claim 1, wherein: the flexible transparent bottom (3) is overlapped with the rigid narrow line width window (9) and forms a flattening area between the rigid parts at two sides of the flexible transparent bottom, a light-cured forming body (20) is arranged above the flattening area, and the single-layer thickness is kept between the lower liquid level of the flattening area and the bottom of the light-cured forming body (20).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920870408.2U CN210309079U (en) | 2019-06-11 | 2019-06-11 | High-efficient line scanning photocuring image device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920870408.2U CN210309079U (en) | 2019-06-11 | 2019-06-11 | High-efficient line scanning photocuring image device |
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| CN210309079U true CN210309079U (en) | 2020-04-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110171136A (en) * | 2019-06-11 | 2019-08-27 | 杭州德迪智能科技有限公司 | A kind of efficient line scanning is light-cured into as device and method |
| CN116512591A (en) * | 2023-05-12 | 2023-08-01 | 深圳市纵维立方科技有限公司 | A printing control method, light-curing printing equipment, and additive manufacturing equipment |
-
2019
- 2019-06-11 CN CN201920870408.2U patent/CN210309079U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110171136A (en) * | 2019-06-11 | 2019-08-27 | 杭州德迪智能科技有限公司 | A kind of efficient line scanning is light-cured into as device and method |
| CN110171136B (en) * | 2019-06-11 | 2024-10-15 | 杭州德迪智能制造有限公司 | High-efficiency line scanning photo-curing imaging device and method |
| CN116512591A (en) * | 2023-05-12 | 2023-08-01 | 深圳市纵维立方科技有限公司 | A printing control method, light-curing printing equipment, and additive manufacturing equipment |
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Address after: Room 3372, 3rd Floor, Building A, No. 482 Qianmo Road, Xixing Street, Binjiang District, Hangzhou City, Zhejiang Province, 310051 Patentee after: Hangzhou Dedi Intelligent Manufacturing Co.,Ltd. Country or region after: China Address before: Room 1601, block a, building 3, No. 228, BINKANG Road, Xixing street, Binjiang District, Hangzhou City, Zhejiang Province 310000 Patentee before: HANGZHOU DEDI INTELLIGENT TECHNOLOGY Co.,Ltd. Country or region before: China |
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