caustics
Caustic (optics)
Caustics made by the surface of water.
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.
Hiding Images in Plain Sight
An Article by Matt FerraroI recently made a physical object that defies all intuition. It's a square of acrylic, smooth on both sides, totally transparent. A tiny window.
But it has the magic property that if you shine a flashlight on it, it forms an image.
Caustic Engineering
An Article by Geoff ManaughA 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.
Architectural Caustics
A Research PaperTo 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?
A Tractate on Japanese Aesthetics
Listings and jottings
Most likely to succeed in defining Japanese aesthetics is a net of associations composed of listings or jottings, connected intuitively, that fills in a background and renders the subject visible.
Process vs. product
...more concerned with process than with product, with the actual construction of a self than with self-expression.
We have been given a standard
We have been given a standard to use. It is there, handy daily: things as they are, or Nature itself. This makes good sense, the only sense really—Nature should be our model.
Merely ornate
There is nothing merely ornate about nature: every branch, twig, or leaf counts.
No words to describe
If there is no term for something, it might be thought that the commodity is of small importance. But it is just as likely that this something is of such importance that it is taken for granted, and thus any conveniences, like words, for discussing it are unnecessary.
Mimesis
Realism played small part in the realities of life as experienced by the traditional Japanese artist. The expectations of the artist's cultivated sensibilities did not demand mimesis. Rather, indication, suggestion, simplicity took the place of any fidelity to outward appearance.
Cherry blossoms
Cherry blossoms are to be preferred not when they are at their fullest but afterward, when the air is thick with their falling petals and with the unavoidable reminder that they too have had their day and must rightly perish.
Immortality, in that it is considered at all, is to be found through nature's way. The form is kept though the contents evaporate.
Wabi-sabi
Sabi is an aesthetic term, rooted in a given concern. It is concerned with chronology, with time and its effects, with product.
Wabi is a more philosophical concept, a quality not attached merely to a given object. It is concerned with manner, with process, with direction.
How painful life here would be
A mountain village
Where there is not even hope
Of a visitor:
If not for the loneliness,
How painful life here would be.— Saigyo (Donald Keene translation)