In optics, a Mangin mirror is a negative meniscus lens with the reflective surface on the rear side of the glass forming a curved mirror that reflects light without spherical aberration. This reflector was invented in 1876 by a French officer Alphonse Mangin as an improved catadioptric reflector for search lights and is also used in other optical devices.
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“A man has only one escape from his old self: to see a different selfin the mirror of some womans eyes.”
—Clare Boothe Luce (19031987)
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