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2. 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.

3. Gradient-index optics - Wikipedia

   en.wikipedia.org/wiki/Gradient-index_optics

   A gradient-index lens with a parabolic variation of refractive index (n) with radial distance (x).The lens focuses light in the same way as a conventional lens. Gradient-index (GRIN) optics is the branch of optics covering optical effects produced by a gradient of the refractive index of a material.

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. Aviator sunglasses - Wikipedia

   en.wikipedia.org/wiki/Aviator_sunglasses

   Aimed at the sports enthusiast and outdoorsman, The Ray-Ban Shooter variant incorporates a cigarette holder, a circular device located at the center of the nose bridge originally intended to free the sportsman's hands while taking aim. In 1953 Ray-Ban introduced G-15 tempered glass lenses.

6. Ray-Ban Meta - Wikipedia

   en.wikipedia.org/wiki/Ray-Ban_Meta

   Ray-Ban Meta is a range of smartglasses created by Meta Platforms and EssilorLuxottica. They include two cameras, open-ear speakers, a microphone, and touchpad built into the frame. [ 1 ] They are latest in a line of smartglasses released by major companies including Snap Inc and Google and are designed as one component of Facebook’s plans ...

7. Luneburg lens - Wikipedia

   en.wikipedia.org/wiki/Luneburg_lens

   For any spherically symmetric lens, each ray lies entirely in a plane passing through the centre of the lens. The initial direction of the ray defines a line which together with the centre-point of the lens identifies a plane bisecting the lens. Being a plane of symmetry of the lens, the gradient of the refractive index has