Any of a series of narrow openings framed at their longer edges with slanting, overlapping fins or slats, adjustable for admitting light and air while shutting out rain
A vented opening into the home that has a series of horizontal slats and arranged to permit ventilation but to exclude rain, snow, light, insects, or other living creatures
{i} shutter, opening covered with overlapping slats which can be angled to let in air and light while keeping out rain; one of the angled slats covering an opening (also louvre)
An opening with a series of horizontal slats so an ranged as to permit ventilation but to exclude rain, sun light, or vision See also Attic ventilators
A light source shielding device consisting of a geometrically patterned series of baffles, designed to shield or absorb unwanted light that is visible from certain angles
Grid type of optical assembly used to control light distribution from a fixture Can range from small-cell plastic to the large-cell anodized aluminum louvers used in parabolic fluorescent fixtures
Arrangement of parallel, horizontal blades or slats of glass, wood, or other material designed to regulate airflow or light penetration. Louvers are often used in windows or doors to allow air or light in while keeping the elements out. They may be either movable or fixed. The term also refers to metal blades covering the intake and exhaust outlets of ventilation and air-conditioning units
A frame fitted with slats or cross pieces that is fitted into an opening of a light fixture For lighting fixtures, the cross pieces in louvers act to reduce glare from exposed lamps May also improve appearance of fixtures, although they sometimes reduce light output somewhat