3D printing technology has been considered disruptive solution for next generation manufacturing. We will review various modality of this process from laser DMLM, E-beam, Binder-jet to high speed Light DMLS. Comparison of different technologies with pros and cons will be discussed based on actual industrial application. Future needs in part quality and throughput/productivity will play a critical role to drive the direction of next gen 3D printing technology.
KEYWORDS: 3D image processing, Imaging systems, Cameras, Lens design, Modulation transfer functions, Image resolution, 3D image reconstruction, 3D metrology, 3D modeling, Structured light
There are many visual inspection and sensing applications where both a high resolution image and a depth-map of the
imaged object are desirable at high speed. Presently available methods to capture 3D data (stereo cameras and structured
illumination), are limited in speed, complexity, and transverse resolution. Additionally these techniques rely on a
separated baseline for triangulation, precluding use in confined spaces. Typically, off the shelf lenses are implemented
where performance in resolution, field-of-view, and depth of field are sacrificed in order to achieve a useful balance.
Here we present a novel lens system with high-resolution and wide field-of-view for rapid 3D image capture. The design
achieves this using a single lens with no moving parts. A depth-from-defocus algorithm is implemented to reconstruct
3D object point clouds and matched with a fused image to create a 3D rendered view.
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