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2. Reflectron - Wikipedia

   en.wikipedia.org/wiki/Reflectron

   Schematic drawing of an ion mirror with high- and low-field regions (dual-stage reflectron). The mirror in a dual-stage reflectron has two regions (stages) with different fields. This makes it possible to zero both the first and second derivatives of t(U) with respect to energy U. That is why dual-stage reflectrons can compensate flight times ...

3. Perfect mirror - Wikipedia

   en.wikipedia.org/wiki/Perfect_mirror

   A new type of dielectric "perfect mirror" was developed in 1998 by researchers at MIT. [2] [3] These unusual mirrors are very efficient reflectors over a broad range of angles and wavelengths, and are insensitive to polarization. A version of the perfect mirror that was developed at MIT for military use is used by OmniGuide in laser surgery. [4]

4. Xylospongium - Wikipedia

   en.wikipedia.org/wiki/Xylospongium

   A replica xylospongium (sponge on a stick) Ancient Roman latrines in Ostia Antica The xylospongium or tersorium, also known as a "sponge on a stick", was a utensil found in ancient Roman latrines, consisting of a wooden stick (Greek: ξύλον, xylon) with a sea sponge (Greek: σπόγγος, spongos) fixed at one end.

5. Dielectric mirror - Wikipedia

   en.wikipedia.org/wiki/Dielectric_mirror

   Dielectric mirrors are also used to produce ultra-high reflectivity mirrors: values of 99.999% or better over a narrow range of wavelengths can be produced using special techniques. Alternatively, they can be made to reflect a broad spectrum of light, such as the entire visible range or the spectrum of the Ti-sapphire laser.

6. Retroreflector - Wikipedia

   en.wikipedia.org/wiki/Retroreflector

   This works at a wide range of angle of incidence, unlike a planar mirror, which does this only if the mirror is exactly perpendicular to the wave front, having a zero angle of incidence. Being directed, the retroflector's reflection is brighter than that of a diffuse reflector. Corner reflectors and cat's eye reflectors are the most used kinds.

7. Specular reflection - Wikipedia

   en.wikipedia.org/wiki/Specular_reflection

   The image in a flat mirror has these features: It is the same distance behind the mirror as the object is in front. It is the same size as the object. It is the right way up (erect). It is reversed. It is virtual, meaning that the image appears to be behind the mirror, and cannot be projected onto a screen.