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2. Optical landing system - Wikipedia

   en.wikipedia.org/wiki/Optical_landing_system

   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 ...

3. Magic lantern - Wikipedia

   en.wikipedia.org/wiki/Magic_lantern

   The magic lantern used a concave mirror behind a light source to direct the light through a small rectangular sheet of glass—a "lantern slide" that bore the image—and onward into a lens at the front of the apparatus.

4. Focal length - Wikipedia

   en.wikipedia.org/wiki/Focal_length

   The focal point F and focal length f of a positive (convex) lens, a negative (concave) lens, a concave mirror, and a convex mirror.. The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system's optical power.

5. Curved mirror - Wikipedia

   en.wikipedia.org/wiki/Curved_mirror

   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.

6. Catoptrics - Wikipedia

   en.wikipedia.org/wiki/Catoptrics

   Catoptrics (from Ancient Greek: κατοπτρικός katoptrikós, "specular", [1] from Ancient Greek: κάτοπτρον katoptron "mirror") [2] deals with the phenomena of reflected light and image-forming optical systems using mirrors. A catoptric system is also called a catopter (catoptre).

7. File:Comparison visual landing systems.svg - Wikipedia

   en.wikipedia.org/wiki/File:Comparison_visual...

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