Optics
Lens
Optical element for → directing light. The radius, form of the curvature, and structure of the lens determine its optical behaviour. In projection spotlights, lens systems serve…
GlossaryOptic
Filter
Optical elements with selective transmission. Filters only transmit part of the incident radiation, to produce either coloured light or by filtering out invisible radiation such…
GlossaryOptic
Darklight technique
A special lighting technology in which the viewer is not dazzled by reflection of the light source, as long as the lamp lies within the cut-off zone of the → reflector or lens.…
Glossary
Diffuser
Optical element for dispersing the rays of light in order to give a soft light beam. Fitted to the luminaire, the diffuser reduces the lamp luminance and can reduce glare.
GlossaryOptic
Anti-dazzle screen
Glossary
Honeycomb anti-dazzle screen
A shielding element with a hexagonal cell structure that evenly limits light emission in all directions. Honeycomb louvres are particularly effective at reducing direct and…
Glossary
Fibre optics
Optical instrument used to guide light along any route, even around curved paths. The light is channelled along the light guide system, a solid rod or tubular conductor made of…
GlossaryOptic
Projection
Projection is the transfer of an image by means of an optic onto a surface. In architectural lighting, the light from a point light source, usually an LED, is directed via lenses…
GlossaryOptic