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2. Cheval mirror - Wikipedia

   en.wikipedia.org/wiki/Full_Length_Mirror

   Cheval glass (USA, c. 1815) The cheval glass (also cheval mirror, psyche mirror, horse dressing glass, swing glass) is a free-standing large mirror, usually with a tilt mechanism, that provided a complete reflection from head to foot (thus also the full-length mirror name).

3. Three-mirror anastigmat - Wikipedia

   en.wikipedia.org/wiki/Three-mirror_anastigmat

   A three-mirror anastigmat is an anastigmat telescope built with three curved mirrors, enabling it to minimize all three main optical aberrations – spherical aberration, coma, and astigmatism. This is primarily used to enable wide fields of view, much larger than possible with telescopes with just one or two curved surfaces.

4. Folded optics - Wikipedia

   en.wikipedia.org/wiki/Folded_optics

   Folded optics is an optical system in which the beam is bent in a way to make the optical path much longer than the size of the system. This allows the resulting focal length of the objective to be greater than the physical length of the optical device.

5. Catadioptric system - Wikipedia

   en.wikipedia.org/wiki/Catadioptric_system

   Mangin mirrors were used in searchlights, where they produced a nearly true parallel beam. Many Catadioptric telescopes use negative lenses with a reflective coating on the backside that are referred to as “Mangin mirrors”, although they are not single-element objectives like the original Mangin, and some even predate Mangin's invention. [4]

6. Star diagonal - Wikipedia

   en.wikipedia.org/wiki/Star_diagonal

   A star diagonal, erecting lens or diagonal mirror is an angled mirror or prism used in telescopes that allows viewing from a direction that is perpendicular to the usual eyepiece axis. It allows more convenient and comfortable viewing when the telescope is pointed at, or near the zenith (i.e. directly overhead).

7. AOL reviewed: This Lands' End Coat is my favorite winter ...

   www.aol.com/lifestyle/lands-end-winter-coat...

   At the same time, it is a practical length for more walking and dashing around the city. This Lands' End winter coat is my favorite. How It Feels. The word “cozy” is in the name for a reason ...