Architectural Caustics - Controlling Light with Geometry

Caustics are captivating light patterns created by materials bundling or diverting light by refraction or reflection. We know caustics as random side effects, appearing, for example, at the bottom of a swimming pool. In this paper we show that it is possible to control caustic patterns to form almost any desired shape by optimizing the geometry of the reflective or refractive surface generating the caustic. We demonstrate how this surprising result offers a new perspective on light control and the use of caustics as an inspiring architectural design element. Several produced prototypes illustrate that physical realizations of such optimized geometry are feasible.

[1]  Louis I. Kahn,et al.  Between Silence and Light: Spirit in the Architecture of Louis I. Kahn , 1979 .

[2]  Niloy J. Mitra,et al.  Shadow art , 2009, SIGGRAPH 2009.

[3]  Francisco J. Serón,et al.  NURBS-based Inverse Reflector Design , 2008, CEIG.

[4]  Mary Ann Steane.  The Architecture of Light , 2011 .

[5]  Vladimir Oliker,et al.  Optical design of freeform two-mirror beam-shaping systems. , 2007, Journal of the Optical Society of America. A, Optics, image science, and vision.

[6]  Abigail Bryant.  Master of light , 2013 .

[7]  Hendrik P. A. Lensch,et al.  Geometry Construction from Caustic Images , 2010, ECCV.

[8]  Gustavo Patow,et al.  User-guided inverse reflector design , 2007, Comput. Graph..

[9]  Gustavo Patow,et al.  Fast Inverse Reflector Design (FIRD) , 2008, CEIG.

[10]  Gustavo Patow,et al.  A Survey of Inverse Surface Design From Light Transport Behavior Specification , 2005, Comput. Graph. Forum.

[11]  Marc Fontoynont,et al.  Daylight Performance of Buildings , 1999 .

[12]  Tim Weyrich,et al.  Fabricating microgeometry for custom surface reflectance , 2009, SIGGRAPH 2009.

[13]  Tim Weyrich,et al.  Goal‐based Caustics , 2011, Comput. Graph. Forum.

[14]  Andreas Neubauer.  Design of 3D-Reflectors for Near Field and Far Field Problems , 1997 .

[15]  Se-yuen Mak,et al.  Secrets of the Chinese magic mirror replica , 2001 .

[16]  Marietta S. Millet,et al.  Light Revealing Architecture , 1996 .

[17]  Harald Ries,et al.  Tailored freeform optical surfaces. , 2002, Journal of the Optical Society of America. A, Optics, image science, and vision.

[18]  Steven Doyle,et al.  Automated mirror design using an evolution strategy , 1999 .