direct illumination

(redirected from vertical illumination)
Also found in: Medical.

direct illumination

Illumination provided by direct light from pyrotechnics or searchlights.
References in periodicals archive ?
Conference rooms, used for video conferences as well as meetings, also feature fluorescent slot fixtures with adjustable LED MR16 accent lights for providing shadowless vertical illumination onto participants' faces when videotaped.
This creates poor vertical illumination, making walls and flooring appear dark and unwelcoming.
A closer look at vertical illumination therefore is worthwhile not just from a design perspective, but also in terms of energy efficiency.
It was important to us to have the luminaire located out of view under the handrail, effectively lighting the stairs/walkway with good vertical illumination, whilst minimizing glare," says Cliff Hadley.
6 foot-candles of vertical illumination, again with an average-to-minimum uniformity ratio not to exceed 4:1.
Other countries also cited the importance of vertical illumination in pedestrian areas to enhance easy identification.
You'd want to maximize vertical illumination, which will make the pedestrian appear bright against a dark background and provide the maximum contrast.
Vertical illumination is another means by which recognition is achieved.
This can be accomplished using brightfield vertical illumination.
Endural[R] borosilicate glass for the LED optics, whichminimizes glare and provides balanced horizontal and vertical illumination to enhance visibility, and to improve productivity and safety.
Furthermore, the indirect illumination on the steps/escalators offered high quality vertical illumination for illuminating people and for identifying the step treads.
An additional light pole was placed on the approach side of the crosswalks in order to produce 39 to 40 lux of vertical illumination at the crosswalk, as recommended by the Swiss.
Full browser ?