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?
The Japanese Perspective
Generally speaking, the Western perception of art has its roots in Greece. For a long time its goal was perfection, which is particularly noticeable in Greek sculpture. This was in keeping with Western scientific thinking; there are no painters like Andrea Mantegna in the East. I am tempted to call such art ‘the art of even numbers’.
In contrast to this, what the Japanese eye sought was the beauty of imperfection, which I would call ‘the art of odd numbers’. No other country has pursued the art of imperfection as eagerly as Japan.
The true meaning of tea
There is no true deformation that does not follow the laws of necessity. In later years, when deformation came to be consciously created, when the rejection of perfection became a matter of deliberate manipulation, the true meaning of tea began to be lost.
To put it in somewhat contradictory terms, true tea existed only before the advent of the tea ceremony. After the coming of tea, when deformation came to be consciously sought, common everyday beauty disappeared and unnatural manipulation began.
One receives with an empty hand
Intuition means to see immediately, directly.
Considered as a form of activity, the seeing eye and the seen object are one, not two. One is embedded in the other. People who know with the intellect before seeing with the eyes cannot be said to be truly seeing.
With intuition, time is not a factor. It takes place immediately, so there is no hesitation. It is instantaneous. Since there is no hesitation, intuition doesn’t harbour doubt. It is accompanied by conviction. Seeing and believing are close brothers.
Only when it has ceased to be a pattern
Here I would like to append three lines in praise of muji:
A pattern that is not a pattern is a true pattern.
Create patterns until they are no longer patterns.
The true pattern is a patternless pattern.When creating a pattern, one’s heart must also be muji. A pattern must be followed through until it is no longer a pattern. It is a true pattern only when it has ceased to be a pattern.