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2. Liquid-crystal display - Wikipedia

   en.wikipedia.org/wiki/Liquid-crystal_display

   A liquid-crystal display (LCD) is a flat-panel display or other electronically modulated optical device that uses the light-modulating properties of liquid crystals combined with polarizers. Liquid crystals do not emit light directly [ 1 ] but instead use a backlight or reflector to produce images in color or monochrome.

3. Overhead projector - Wikipedia

   en.wikipedia.org/wiki/Overhead_projector

   Overhead projector. An overhead projector (often abbreviated to OHP), like a film or slide projector, uses light to project an enlarged image on a screen, allowing the view of a small document or picture to be shared with a large audience. In the overhead projector, the source of the image is a page-sized sheet of transparent plastic film (also ...

4. Poly(methyl methacrylate) - Wikipedia

   en.wikipedia.org/wiki/Poly(methyl_methacrylate)

   Poly (methyl methacrylate) (PMMA) is the synthetic polymer derived from methyl methacrylate. It is used as an engineering plastic, and it is a transparent thermoplastic. PMMA is also known as acrylic, acrylic glass, as well as by the trade names and brands Crylux, Hesalite, Plexiglas, Acrylite, Lucite, and Perspex, among several others (see below).

5. Lightguide display - Wikipedia

   en.wikipedia.org/wiki/Lightguide_display

   The Swedish electronic computer BESK, built in 1953, displayed 18 hexadecimal digits using edge-lit acrylic, the grey squares at the center of the green console. It contains a set of sandwiched acrylic or clear plastic panels, each of which is engraved with a numeral or character to be displayed.

6. Polycarbonate - Wikipedia

   en.wikipedia.org/wiki/Polycarbonate

   These discs are produced by injection-molding polycarbonate into a mold cavity that has on one side a metal stamper containing a negative image of the disc data, while the other mold side is a mirrored surface. Typical products of sheet/film production include applications in advertisement (signs, displays, poster protection). [6]

7. Picture framing glass - Wikipedia

   en.wikipedia.org/wiki/Picture_framing_glass

   Regular (or "Clear") Due to widespread availability and low cost, Soda Lime Glass is most commonly used for picture framing glass. Glass thicknesses typically range from 2.0 to 2.5 millimetres (0.079 to 0.098 in). Clear glass has light transmission of approximately 90%, absorption of approximately 2%, and reflection of approximately 8%.