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First-surface mirrors are now made for applications requiring a strict reflection without a ghosting effect as seen with a second-surface mirror, where a faint secondary reflection could be observed, coming from the front surface of the glass. This includes most optics applications where light is being manipulated in a specific manner.
In contrast to household mirrors, where the reflecting metal layer is coated on the back of a glass pane and covered with a protective varnish, precision optical equipment like telescopes needs first surface mirrors that can be ground and polished into complex shapes such as parabolic reflectors. For nearly 200 years speculum metal was the only ...
Builders FirstSource, Inc. is a Fortune 500 company [1] [2] that is a manufacturer and supplier of building materials. [3] The company is headquartered in Irving, Texas, and is the largest supplier of building products, prefabricated components and value-added services in the US.
When glass mirrors first gained widespread usage in Europe during the 16th century, most were silvered with an amalgam of tin and mercury, [6] In 1835 German chemist Justus von Liebig developed a process for depositing silver on the rear surface of a piece of glass; this technique gained wide acceptance after Liebig improved it in 1856.
On July 15, the resulting Wisconsin HTS Axisymmetric Mirror (WHAM) achieved first plasma, a major milestone for the device, and now the team will work on improving efficiencies and hopefully ...
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