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2. Blackout (fabric) - Wikipedia

   en.wikipedia.org/wiki/Blackout_(fabric)

   The process of manufacturing blackout was invented by Baltimore-based Rockland Industries, [2] and involves coating a fabric with layers of foam, or 'passes'. A '2-pass' blackout is produced by applying two passes of foam to a fabric – first, a black layer is applied to the fabric, then a white or light-colored layer is applied on top of the black.

3. Window blind - Wikipedia

   en.wikipedia.org/wiki/Window_blind

   Various window blind styles. A window blind is a type of window covering. [1] 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.

4. Curtain - Wikipedia

   en.wikipedia.org/wiki/Curtain

   Sash curtains are used to cover the lower sash of the windows. Rod pocket curtains have a channel sewn into the top of the fabric. A curtain rod is passed through the channel to hang. [15] Thermal or blackout curtains use very tightly woven fabric, usually in multiple layers. They not only block out the light, but can also serve as an acoustic ...

5. Blackout light - Wikipedia

   en.wikipedia.org/wiki/Blackout_light

   Blackout stop lights take the place of the normal stoplight when operating in blackout conditions. In US military vehicles when the brakes are applied in blackout mode the brake light appears as a white light. The blackout stop lights are typically in the same taillight assembly as the rear blackout marker lights.

6. History of the single-lens reflex camera - Wikipedia

   en.wikipedia.org/wiki/History_of_the_single-lens...

   This allowed quicker shutter-curtain travel time (3.6 milliseconds, about half of earlier vertical, metal bladed shutters) and thereby truly faster shutter speeds. [251] The Nikon FE2 (Japan), with an improved version of this shutter, boosted X-sync speed to 1/250 sec. (3.3 ms curtain travel time) in 1983. [ 252 ]