angle of illumination

angle of illumination

The angle between the axis of an illuminator and a perpendicular to the surface being illuminated.
References in periodicals archive ?
As it orbits the Earth, its angle of illumination by the Sun slowly changes, and the shape of the illuminated portion (known as the phase) changes from a thin crescent , through to a first quarter (or half Moon), to being fully lit (full Moon).
The pendant rod option extends the spotlight down from the ceiling, for a different angle of illumination.
The front fog lamps, now integrated into a trapezoidal front bumper, provide a wider angle of illumination.
Pearlescent pigments are used to achieve vivid interactions of color and luster with the added dimension of variation depending on the angle of illumination and observation.
A low angle of illumination in high relief terrain will result in large areas being shadowed.
Here, chiaroscuro isn't a painterly illusion but an actuality: Volumes of light and lacy silhouettes of shadow shift with the angle of illumination.
LVMH looked at the change in angle of illumination of special effect (flip-flop) pigments using the multi-angle spectrophotometer MA68II.
The Yak featured a headlamp style dividing the source of light into many units that can be modulated according to the luminous intensity desired, the vehicle speed or the angle of illumination, while the two Carrozzeria Castagna vehicles took advantage of the small LED footprint to create dramatic new line cuts on the vehicle.
Since the LEDs are adjustable in angle of illumination and intensity, the integrated IR solution is easy-to-install and is optimized for the scene.
As the Moon orbits the Earth - roughly once every 30 days - its angle of illumination slowly changes.
A new built-in flash mechanism that slides the EVOLT flash forward as it pops up also contributes to the camera's low overall height and makes it possible to achieve both an adequate angle of illumination and a low profile body design.
As it orbits the Earth, its angle of illumination by the sun slowly changes and the shape of the illuminated portion (known as the phase), changes from a thin crescent, through to a first quarter, or half moon, to being a fully lit full moon.