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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.
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.
As a drawing aid, it allowed tracing the projected image to produce a highly accurate representation, and was especially appreciated as an easy way to achieve proper graphical perspective. Before the term camera obscura was first used in 1604, other terms were used to refer to the devices: cubiculum obscurum , cubiculum tenebricosum , conclave ...
Treasure has a new steampunk and submarine-inspired Periscope Pub for a true 'at sea' experience. You'll feel like you're under the sea in the Periscope Pub. Caralynn Matassa/Business Insider.
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 ...
Learn how to download and install or uninstall the Desktop Gold software and if your computer meets the system requirements.
The Reality Labs division at Meta, which makes tech like the Orion headset Mark Zuckerberg showed off in September 2024, has racked up more than $60 billion in losses over five years. picture ...