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  2. Smart glass - Wikipedia

    en.wikipedia.org/wiki/Smart_glass

    When one enters, the glass is opaque as the cube moves out over the edge of the building. Once fully extended over the edge, the glass becomes clear. The Boeing 787 Dreamliner features electrochromic windows which replaced the pull down window shades on existing aircraft. [19]

  3. Window film - Wikipedia

    en.wikipedia.org/wiki/Window_film

    Switchable films can be switched from opaque to clear by a safe voltage under 36V AC. In its opaque state, it can be perfectly used as a projection screen that is viewable from both sides. 3G switchable film also has UV (100%) and IR (94%) blocking functions and security function. Graphic design films are generally colored vinyl or frosted.

  4. Transparent conducting film - Wikipedia

    en.wikipedia.org/wiki/Transparent_conducting_film

    Doped metal oxides for use as transparent conducting layers in photovoltaic devices are typically grown on a glass substrate. This glass substrate, apart from providing a support that the oxide can grow on, has the additional benefit of blocking most infrared wavelengths greater than 2 μm for most silicates, and converting it to heat in the glass layer.

  5. Transparency and translucency - Wikipedia

    en.wikipedia.org/wiki/Transparency_and_translucency

    Materials that allow the transmission of light waves through them are called optically transparent. Chemically pure (undoped) window glass and clean river or spring water are prime examples of this. Materials that do not allow the transmission of any light wave frequencies are called opaque. Such substances may have a chemical composition which ...

  6. Transparent ceramics - Wikipedia

    en.wikipedia.org/wiki/Transparent_ceramics

    It has all the workability of an amorphous glass, but upon recrystallization it demonstrates properties similar to a crystalline ceramic. Vycor is 96% fused silica glass, which is crystal clear, lightweight and high strength. One advantage of these type of materials is that they can be produced in large sheets and other curved shapes. [23] [24]

  7. Overhead projector - Wikipedia

    en.wikipedia.org/wiki/Overhead_projector

    The opaque projector, or episcope is a device which displays opaque materials by shining a bright lamp onto the object from above. The episcope must be distinguished from the diascope , which is a projector used for projecting images of transparent objects (such as films or slides), and from the epidiascope , which is capable of projecting ...

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