Efficient line scanning photo-curing imaging device and method

Abstract

The invention relates to an efficient line scanning photo-curing imaging device and method. The device comprises a frame, wherein a liquid tank is arranged above the frame, a 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 movable platform is arranged on the linear module, the moving direction of the movable platform is parallel to the longitudinal direction of a flexible transparent bottom, a support is arranged on the movable platform, a laser light source, a resonance type micro-electromechanical reflector and a rigid narrow-line wide window are arranged on the support, a light beam emitted by the laser light source is just printed on the resonance type micro-electromechanical reflector, the deflection axis of the resonance type micro-electromechanical reflector is parallel to the longitudinal plane of the flexible transparent bottom and is perpendicular tothe longitudinal center line of the flexible transparent bottom to coincide, rigid parts at the two sides of the rigid narrow-line wide window are in contact with the flexible transparent bottom andenable the rigid narrow-line wide window to be elastically deformed and tensioned, and the window direction of the rigid narrow-line wide window is consistent with that of the flexible transparent bottom. According to the efficient line scanning photo-curing imaging device, the scheme is economic and reasonable, the physical resolution is high, the light energy utilization rate is high, and the efficient line scanning photo-curing imaging device is easy to popularize and apply in large-scale, high-precision and high-efficiency photo-curing three-dimensional forming equipment.

Description

technical field [0001] The invention relates to the field of 3D printing, in particular to a high-efficiency line-scan photocuring imaging device and method. Background technique [0002] As the mainstream technology in the field of 3D printing, stereolithography 3D forming has the obvious advantages of fast forming speed, good surface quality and high detail accuracy, and has been widely used in dental, jewelry, automobile and other industries. Similar to the layer-by-layer forming principle of other 3D printing technologies, when the three-dimensional light-curing forming is used for single-layer curing, liquid crystal display (LCD), digital light processor (DLP), electromagnetic coil scanning galvanometer and other imaging components are used to convert specific wavelength The light source is patterned and imaged onto the liquid surface of the photosensitive resin for selective exposure and curing. According to the position of the imaging liquid surface, photocuring can ...

AI Technical Summary

Problems solved by technology

[0003] On the other hand, LCD adopts light transmission and shielding method to realize patterned imaging. The light transmittance is low, and the typical light energy utilization rate is only 4%-7%. A large amount of light is trapped inside the LCD display, causing serious heat generation and display aging. question

DLP uses micromirror array reflective bypass to achieve patterned imaging, and its light energy utilization rate is higher than that of LCD, but DLP is expensive, and its physical resolution is lower than that of LCD displays, and the light bypassed by reflection also causes considerable light energy. waste

Electromagnetic coil scanning galvanometer imaging technology uses a deflection servo motor to manipulate the mirror through macroscopic mechanical movement, and then controls the laser beam to scan and image in a vectorized manner. It has the highest utilization rate of light energy, but the scanning speed is low and the imaging performance of complex patterns is low.

[0004] In addition, in order to reduce the difficulty of peeling, the existing lower liquid surface photo-curing technology generally uses a flexible transparent film as the solid interface of the lower liquid surface, and in order to flatly attach the cured lower liquid surface to the cured layer, the lower liquid surface The surface must be supported on a rigid plane. Therefore, in the existing photo-curing equipment for the lower liquid surface, a rigid flat glass substrate is generally installed under the flexible transparent film, which will not only cause reflection, refraction, and ghosting of the imaging of the lower liquid surface. And other optical interference will further weaken the light intensity that finally acts on the lower liquid surface

At present, in the field of photo-curing 3D forming, there is still a lack of a photo-curing imaging technology with economical and reasonable solutions, high physical resolution, high light energy utilization, and strong imaging capabilities for complex patterns.

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