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A periscope is an instrument for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation from an observer's current position. [ 1 ] [ 2 ] In its simplest form, it consists of an outer case with mirrors at each end set parallel to each other at a 45° angle.
Schematic of a conventional and a periscope zoom lens A smartphone with a 5x optical zoom periscope lens camera, recognizable by the rectangular shape of its lens. A periscope lens, sometimes called a folded lens, is a mechanical assembly of lens elements that uses a prism or mirror to redirect the light through the lenses with a 90° angle to the optical axis, as in a periscope.
By rotating the periscope and allowing the tank commander to look backwards through the second eyepiece, he no longer had to change position to look behind the turret. Early tanks had small turrets and fixed seating, without an independently rotating cupola, and so the commander wasn't easily able to move himself to another rear-facing periscope.
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Virtual periscope is a system that allows submerged submarines to observe the surface above them without having to come to a shallower depth, as is required by traditional periscopes. The system, described in a patent as "Virtual Periscope", [1] was tested in 2005 aboard USS Chicago (SSN-721). It employed a small camera mounted on the sail of ...
Take three cardboard A, B and C, of the same size. Make a pin hole at the centre of each of three cardboard. Place the cardboard in the upright position, such that the holes in A, B and C are in the same straight line, in the order.
Celestial navigation using the periscope, or sextant—seldom used anymore due to advancement in technology; Radar navigation; radar signals are easily detected so radar is normally only used in friendly waters entering and exiting ports. With the implementation of a more advanced radar system, many new techniques have been implemented in this ...
In telecommunications, a periscope antenna is an antenna configuration in which the transmitting antenna is oriented to produce a vertical radiation pattern, and a flat or off-axis parabolic reflector, mounted above the transmitting antenna, is used to direct the beam in a horizontal path toward the receiving antenna.
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