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The mirror landing aid was invented by Nicholas Goodhart. [2] It was tested on the carriers HMS Illustrious and HMS Indomitable before being introduced on British carriers in 1954 and on US carriers in 1955. The mirror landing aid was a gyroscopically controlled concave mirror on the port side of the flight deck. On either side of the mirror ...
The 1645 first edition of German Jesuit scholar Athanasius Kircher's book Ars Magna Lucis et Umbrae included a description of his invention, the "Steganographic Mirror": a primitive projection system with a focusing lens and text or pictures painted on a concave mirror reflecting sunlight, mostly intended for long-distance communication ...
A concave mirror, or converging mirror, has a reflecting surface that is recessed inward (away from the incident light). Concave mirrors reflect light inward to one focal point. They are used to focus light. Unlike convex mirrors, concave mirrors show different image types depending on the distance between the object and the mirror.
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Trials after 1945 by the Royal Navy revealed that the slow throttle response of jet aircraft meant they could not safely use the standard deck landing technique then in use by propeller-driven aircraft. Even in peacetime, carrier operations killed 20% of the aircrew. [3] Goodhart therefore invented the mirror-sight deck landing system in 1951. [4]
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Light path in a Cassegrain reflecting telescope. The Cassegrain reflector is a combination of a primary concave mirror and a secondary convex mirror, often used in optical telescopes and radio antennas, the main characteristic being that the optical path folds back onto itself, relative to the optical system's primary mirror entrance aperture.
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