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2. Aviator sunglasses - Wikipedia

   en.wikipedia.org/wiki/Aviator_sunglasses

   The sunglasses were redesigned with a metal frame in 1939 and promoted by Bausch & Lomb as the Ray-Ban Aviator. [12] According to the BBC , the glasses used "Kalichrome lenses designed to sharpen details and minimise haze by filtering out blue light, making them ideal for misty conditions."

3. Ray-Ban - Wikipedia

   en.wikipedia.org/wiki/Ray-Ban

   Ray-Ban is a brand of luxury sunglasses and eyeglasses created in 1936 by Bausch & Lomb. The brand is best known for its Wayfarer and Aviator lines of sunglasses. In 1999, Bausch & Lomb sold the brand to Italian eyewear conglomerate Luxottica Group for a reported $640 million.

4. Sunglasses - Wikipedia

   en.wikipedia.org/wiki/Sunglasses

   The Ray-Ban Wayfarer is a (mostly) plastic-framed design for sunglasses produced by the Ray-Ban company. Introduced in 1952, the trapezoidal lenses are wider at the top than the bottom (inspired by the Browline eyeglasses popular at the time), and were famously worn by James Dean , Roy Orbison , Elvis Presley , Bob Marley , The Beatles and ...

5. Birefringence - Wikipedia

   en.wikipedia.org/wiki/Birefringence

   Comparison of positive and negative birefringence : In positive birefringence (figure 1), the ordinary ray (p-polarisation in this case w.r.t. magenta-coloured plane of incidence), perpendicular to optic axis A is the fast ray (F) while the extraordinary ray (s-polarisation in this case and parallel to optic axis A) is the slow ray (S).

6. Radial polarization - Wikipedia

   en.wikipedia.org/wiki/Radial_polarization

   A radially polarized beam can be used to produce a smaller focused spot than a more conventional linearly or circularly polarized beam, [8] and has uses in optical trapping. [ 9 ] It has been shown that a radially polarized beam can be used to increase the information capacity of free space optical communication via mode division multiplexing ...