October 8, 2012 report
Disney's magical vision calls for 3-D printed optical elements (w/ Video)
(Phys.org)—Disney Research is serious about mixing science with play and pushing further into imaginative results with 3-D printing. A research paper, "Printed Optics: 3D Printing of Embedded Optical Elements for Interactive Devices," talks about explorations into 3-D printing with custom optical elements for interactive devices. As such, Disney Research is thinking toward a next-step in digital printing when one will print interactive objects on the fly. Authors of the paper, Karl D.D. Willis, Eric Brockmeyer, Scott E. Hudson, Ivan Poupyrev, are all focused on future printing techniques and applications.
Willis and Brockmeyer are from Disney Research in Pittsburgh and Hudson and Poupyrev are from Carnegie Mellon University. The two sites provide opportunities for collaboration partly stemming from the fact that Carnegie Mellon is one of the leading seedbeds of research into robotics, computer vision, and human-computer interaction (HCI). The relationship with Carnegie Mellon gives Disney researchers added expertise as well as access to lab facilities in robotics and motion capture.
"We envision future interactive devices that are not assembled but 3-D printed layer by layer," the authors said. They talk about how novel elements can be fabricated with 3-D printing and embedded in interactive devices. They talk about new possibilities in display surfaces and embedded optoelectronics. They see "tremendous potential" for rapid high ﬁdelity prototyping, and eventually for production of customized devices tailored to speciﬁc tasks.
"Display surfaces can be created on arbitrary shaped objects using 3-D printed 'light pipes,'" they said.
"Novel illumination techniques allow the internal space within a 3-D printed object to be used for illumination and display purposes. Custom optical sensors can be 3-D printed with the structure of interactive devices to sense user input. Optoelectronic components can be completely enclosed inside optical elements to produce highly customizable and robust interactive devices."
Light pipes are 3-D printed optical elements that are similar but not identical to optical ﬁber. They can be used to guide light from point to point. The paper explained that "Unlike conventional optical ﬁber, 3-D printed light pipes allow arbitrary geometries to be created in software and then locations on the surface of a mobile device to a single sensor array." They add that light pipes can be printed into the walls of a device to create robust and exceptionally thin, sub mm, embedded sensing with minimal hardware assembly.
As for when all this will be possible, the authors are optimistic about possibilities for fabricating light pipes in the next generation of optically optimized 3D printers.
They said that the ability to dynamically control optical properties such as the refractive index, reﬂectivity, transmittance, absorption, and diffusion will enable a richer design space for sensing, display, and illumination.
"Although that time is not upon us yet, Printed Optics demonstrates what is possible today." They define Printed Optics as a new approach to creating custom optical elements for interactive devices using 3-D printing.
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