A periscope is an optical instrument used to observe one's surroundings from a concealed position or around obstacles. It works by using mirrors or prisms to redirect light and allows the user to see above or around barriers. Periscopes are commonly found in submarines, tanks, and other military vehicles.
A periscope is an optical instrument used to observe one's surroundings from a concealed position or around obstacles. It works by using mirrors or prisms to redirect light and allows the user to see above or around barriers. Periscopes are commonly found in submarines, tanks, and other military vehicles.
A periscope is an optical instrument used to observe one's surroundings from a concealed position or around obstacles. It works by using mirrors or prisms to redirect light and allows the user to see above or around barriers. Periscopes are commonly found in submarines, tanks, and other military vehicles.
A periscope is an optical instrument used to observe one's surroundings from a concealed position or around obstacles. It works by using mirrors or prisms to redirect light and allows the user to see above or around barriers. Periscopes are commonly found in submarines, tanks, and other military vehicles.
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PERISCOPE
What are the uses of a periscope?
The uses of a periscope include observation around barriers and at times when viewing a location directly would be dangerous. Periscopes are typically used in submarines to see above the water, in tanks to see above and around the vehicle and by people attending parades and other events to see over the crowd. Periscopes also are sometimes used for seeing into nuclear reactors and were used for seeing out of trenches in World War I. Simple versions of the optical instruments were first used in the 1600s, with submarine periscopes first used in the 1800s. In his famous 1927 trans-Atlantic flight, Charles Lindbergh carried so much fuel that he needed a periscope to see around the fuel tank of his plane. A simple periscope is constructed from a tube with two mirrors set at a 45degree angle in relation to the tube. When mirrors are parallel to each other, the periscope can be used to view objects in front of the viewer. If the mirrors are at right angles, the periscope is used to see objects behind the viewer, and the image seen is upside down. In complex periscopes, prisms are sometimes used instead of mirrors. Submarines use lens systems in addition to mirrors for an enlarged view.
Who invented the periscope?
In 1854, Frenchman Hippolyte Marie-Davey invented the first naval periscope, which was a sight tube made of two mirrors at 45-degree angles. In the 1880s, other periscopes were created, but these designs, including Marie-Davey's, were still primitive in development and not entirely useful Thomas H. Doughty of the United States Navy invented a prismatic periscope, which was used in the American Civil War. In 1902, Simon Lake, a submarine engineer, created a more effective, collapsible omniscope with eight prisms for all-around, rotating viewpoints. This was helpful for viewing the water while the submarine moved at a lower speed. Improvements to Lake's omniscope included a double tube, so that it could withstand more pressure and speed.
What is a periscope? A periscope is an optical tool that uses two mirrors or prisms to redirect light through a tube. This allows the viewer to look over or around obstacles. he simplest periscopes use a pair of mirrors set at parallel 45-degree angles. When light strikes the upper mirror, it is reflected 90 degrees downward into the tube of the periscope. When it reaches the bottom, it is reflected 90 degrees horizontally into the viewfinder. Viewers are able to observe their surroundings as if their eyes were at the level of the top of the periscope. Periscopes are common in submarines and other military vehicles to enable occupants to survey an area without exposing themselves to fire.
What is inside a submarine?
Common features found inside a submarine include navigational equipment, a GPS station and a periscope. The interiors of submarines can vary greatly, depending in part on the type of submarine under discussion Most submarines have a control station that somewhat resembles those used in an aircraft. Submarines generally have a sonar station for detecting other vessels, since visibility underwater is very limited, as well as a radar station for detecting objects and vessels at and above the surface of the water. Modern submarines also use GPS for navigation. Submarines have traditionally also used periscopes to see above the water, but these are becoming less common in modern military submarines due to their short visibility range. Some military subs instead have photonics masts that deploy above the surface of the water. Submarines also have a communications station. These often use lowfrequency radio waves to communicate with land and other ships.
Submarines also often use a form of sonar telephone to communicate with
other submerged submarines. Submarines also require sleeping and eating quarters for their crew. Modern military subs often have crews of over 80, so bunk beds are used to conserve space. In addition, submarines need machinery to convert carbon monoxide to carbon dioxide and to generate breathable air through the electrolysis of water.
How is a prism used in a periscope?
A prism is used in a periscope to bend and reflect light. Simple prismbased periscopes use two triangular prisms to produce an image of something that the viewer would not otherwise be able to see. Prism-based periscopes provide better images than mirror-based periscopes. A simple periscope is constructed from a container and two right angle prisms. The prisms are inserted into either end of the periscope with a right-angle side of one prism facing a right-angle side on the other prism in a parallel manner. The other side of each right angle needs to face out of an opening in the container. The non-right angle side of each prism faces away from an opening. Light, transmitting an image, flows through one opening and bounces off the slanted side of the associated prism at a right angle down to the other prism. There it is again reflected off the slanted side of the prism at a right angle and out through the second opening. When the periscope user points the first opening toward the place he wants to view and positions his eye at the other opening, he is able to see the transmitted image. Periscopes have many applications, such as peering inside nuclear reactors and seeing out of armored vehicles during military maneuvers. Modern periscopes often feature lenses and more complicated set-ups to produce better images, but they all work on the basic premise of reflection.
