A louver or louvre is a window blind or shutter with horizontal slats that are angled to admit light and air, but to keep out rain and direct sunshine. The angle of the slats may be adjustable, usually in blinds and windows, or fixed.
Louver used in a Stevenson screen
Louver shutters in Italy
Louvered cupola bell house
The belfry louvers of Sens Cathedral, France
A window blind is a type of window covering. There are many different kinds of window blinds which use a variety of control systems. A typical window blind is made up of several long horizontal or vertical slats of various types of hard material, including wood, plastic or metal which are held together by cords that run through the blind slats. Vertical blinds run along a track system which can tilt open and closed and move side-to-side. Window blinds can be manoeuvred with either a manual or remote control by rotating them from an open position, with slats spaced out, to a closed position where slats overlap and block out most of the light. There are also several types of window coverings, called shades, that use a single piece of soft material instead of slats.
Various window blind styles
Window blinds stopper. An old window part to prevent open window blinds from closing. From the Sarona Museum in Israel.
Japanese Shoji Blinds in Nottingham UK.
Cellular shades, also called honeycomb shades, hanging in a window.
