Abstract
We propose and demonstrate a simple, low-cost, three-dimensional (3D) shape acquisition method for transparent 3D printed microscopic objects. Our method uses ultraviolet (UV) illumination to obtain high-contrast silhouette images of transparent 3D printed polymer objects. Multiple silhouette images taken from different viewpoints make it possible to reconstruct the 3D shape of this transparent object. A 3D shape acquisition system consisting of a UV light-emitting diode, charge-coupled device camera and a rotation stage was constructed and used to successfully reconstruct the 3D shape of a transparent bunny model produced using micro-stereolithography. In addition, 3D printed pillar array models, with different diameters on the order of several hundred micrometers, were reconstructed. This method will be a promising tool for the 3D shape reconstruction of transparent 3D objects on both the micro- and macro-scale by changing the imaging lens.
Highlights
In recent years, various kinds of 3D printing technologies, from macro- to micro-scale devices, have been developed and widely used with a wide variety of materials including polymers, metals and ceramics [1,2,3]
We demonstrated a simple and low‐cost 3D shape acquisition method for transparent 3D printed microscopic objects
Multiple silhouette images taken from different viewpoints made it possible to reconstruct the 3D shapes of the transparent 3D printed objects using the shape from silhouette (SFS) method, with a 3D shape acquisition
Summary
Various kinds of 3D printing technologies, from macro- to micro-scale devices, have been developed and widely used with a wide variety of materials including polymers, metals and ceramics [1,2,3]. The SFS method, in particular, is a simple way to reconstruct a 3D shape of the target 3D object using multiple silhouette images captured from several directions. It has an advantage because it can be realized using only small and inexpensive pieces of equipment such as a camera, lighting device and rotary stage. MicromOauchrinmese2t0h18o,d9, exmFOpRloPyEsERthReEsVtIrEaWtegy reported by Atsushi et al [10] for acquiring a 3D shape f3roomf 8 silhouette images In this method, a voxel-based 3D model is first used to represent the 3D shape of tthhee ttaarrggeett oobbjjeecctt iinn tthhee SSFFSS mmeetthhoodd. Resin, we fabricated a pillar array model that had four pillars with different diameters
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