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Spin casting is a technique for constructing large parabolic mirrors by using the curved surface formed by a rotating liquid (e.g. in a rotating furnace). [1] It is distinct from the spin casting or centrifugal rubber mold casting (CRMC) technique used for casting metal or plastics.
Folding mirrors, also called "box mirrors", from about 400 BCE, typically had relief designs on the outside of the lid, and engraved decoration on the inside. Most were still round, and lacked handles, presumably as they were meant to be held by a maid. Eros/Cupid is often shown holding up a mirror for Aphrodite/Venus.
Round convex mirrors called Oeil de Sorcière (French for "sorcerer's eye") were a popular luxury item from the 15th century onwards, shown in many depictions of interiors from that time. [3] With 15th century technology, it was easier to make a regular curved mirror (from blown glass) than a perfectly flat one.
A mirror reflecting the image of a vase A first-surface mirror coated with aluminium and enhanced with dielectric coatings. The angle of the incident light (represented by both the light in the mirror and the shadow behind it) exactly matches the angle of reflection (the reflected light shining on the table). 4.5-metre (15 ft)-tall acoustic mirror near Kilnsea Grange, East Yorkshire, UK, from ...
TLV mirror from the Eastern Han period "TLV mirror" is the name given by archeologists to a type of bronze mirror that was popular during the Han dynasty in China. They are called TLV mirrors because symbols resembling the Latin letters "T," "L" and "V" are cast in the design. They were produced from around the 2nd century BCE until the 2nd ...
An oblique projection of a focus-balanced parabolic reflector. It is sometimes useful if the centre of mass of a reflector dish coincides with its focus.This allows it to be easily turned so it can be aimed at a moving source of light, such as the Sun in the sky, while its focus, where the target is located, is stationary.