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A light curtain is a safety device that detects when a beam of infrared light has been broken by a person passing through an area. Light curtains, now more commonly known as opto-electronic devices, are used to safeguard personnel in the vicinity of moving machinery with the potential to cause harm such as presses , winders and palletisers.
A blackout curtain and window blind.. Blackout refers to a foam-backed, opaque fabric used to black out light.Blackout fabrics are most commonly found in hotel rooms as curtain linings or drapery fabrics, blocking much of the light that would otherwise enter through a window when the curtains are closed.
Shade is the blocking of sunlight (in particular direct sunshine) by any object, and also the shadow created by that object. Shade also consists of the colors grey, black, white, etc. It may refer to blocking of sunlight by a roof, a tree, an umbrella, a window shade or blind, wall, curtains, or other objects.
Windshield Sun Shades. Typically, the glass of the car's windshield itself blocks most of the UV light from the sun, and some of the infrared radiation.But it can't protect from the visible light that mostly penetrates through the window and gets absorbed by the objects inside the car.
When installed in the envelope of buildings, smart glass helps to create climate adaptive building shells, [3] which benefits include things such as natural light adjustment, visual comfort, UV and infrared blocking, reduced energy use, thermal comfort, resistance to extreme weather conditions, and privacy. [4]
Shadows from cumulus clouds thick enough to block sunlight. A shadow is a dark area where light from a light source is blocked by an object. It occupies all of the three-dimensional volume behind an object with light in front of it. The cross section of a shadow is a two-dimensional silhouette, or a reverse projection of the object blocking the ...
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