In optics, a caustic is the envelope of light rays reflected or refracted by a curved surface or object, or the projection of that envelope of rays on another surface. The caustic is a curve or surface to which each of the light rays is tangent, defining a boundary of an envelope of rays as a curve of concentrated light.
A piece of milled plexiglass acting as a projecting lens; via the Computer Graphics and Geometry Lab at the École Polytechnique Fédérale de Lausanne
New milling techniques applied to glass and plexiglass panels could be used to “create windows that are also cryptic projectors, summoning ghostly images from sunlight.”
[Pauly and Bompas] hope that the technique will be used in architectural design, to create windows that mould sunlight and throw images or patterns onto walls or floors,” which, if timed, milled, and manipulated just right, could produce a slowly animated sequence of images being projected by an otherwise empty window during different times of day.
To control the shape of a caustic pattern generated by a specular or refractive surface, we need to solve the inverse problem: how can we change the surface geometry, such that incident light is redirected to produce a desired caustic image?
I am tired of the premise that creation means productivity––especially in the laborious sense...Creation has become mangled with labor in a world that demands man to monetize all of their hobbies and pursuits. In return, it seems empty, almost sad, really––to be the designer spending weekends again on the screen.
To tell you what I like to do in the weekends, I like to do the sad thing...The ‘good’ people tell you to detach your life from your workspace, but this summer, I think I’ve just realized how much I adore what I have the luxury of working on everyday.
In the weekend, I make. I make not because it’s the only thing I have ever known, but because it’s the most certain way forward.