63 relations: Advanced Combat Optical Gunsight, Aimpoint CompM2, Astronomical object, Brown recluse spider, Chemical milling, Chevron (insignia), Collimated light, Collimator sight, Computer, Concentric objects, Cursor (user interface), Deflection (ballistics), Diamond, Dragunov (SVD-63) sniper rifle, Electric battery, EOTech, External ballistics, Filar micrometer, Film, Firearm, FN P90, Focusing screen, Glass, Graphical user interface, Gridiron (cooking), Holographic weapon sight, Holography, Iron sights, Laser, Laser diode, Level (instrument), Light tube, Light-emitting diode, Mary Babnik Brown, Microscope slide, Milliradian, Night vision, Optical axis, Optical fiber, Parallax, Philippe de La Hire, Photomask, Polar alignment, Polaris, Radar, Red dot sight, Reflection (physics), Reflector sight, Refraction, Reticulum, ..., Robert Hooke, SA80, Sight (device), Sniper, Spherical aberration, Stadia mark, Stadiametric rangefinding, SUSAT, Telescopic sight, Theodolite, Tritium, Vertical bar, William Gascoigne (scientist). Expand index (13 more) » « Shrink index
Advanced Combat Optical Gunsight (abbreviated ACOG) is a series of telescopic sights manufactured by Trijicon.
The CompM2 is a battery-powered, non-magnifying red dot type of reflex sight for firearms manufactured by Aimpoint AB.
An astronomical object or celestial object is a naturally occurring physical entity, association, or structure that exists in the observable universe.
The brown recluse, Loxosceles reclusa, Sicariidae (formerly placed in a family "Loxoscelidae") is a recluse spider with a necrotic venom.
Chemical milling or industrial etching is the subtractive manufacturing process of using baths of temperature-regulated etching chemicals to remove material to create an object with the desired shape.
A chevron (also spelled cheveron, especially in older documents) is a V-shaped mark, often inverted.
Collimated light is light whose rays are parallel, and therefore will spread minimally as it propagates.
A collimator sight is a type of optical sight that allows the user looking into it to see an illuminated aiming point aligned with the device the sight is attached to, regardless of eye position (with little parallax).
A computer is a device that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming.
In geometry, two or more objects are said to be concentric, coaxal, or coaxial when they share the same center or axis.
In computer user interfaces, a cursor is an indicator used to show the current position for user interaction on a computer monitor or other display device that will respond to input from a text input or pointing device.
Deflection is a technique used for effectively propelling a projectile at a moving target, also known as leading the target, i.e. shooting ahead of a moving target so that the target and projectile will collide.
Diamond is a solid form of carbon with a diamond cubic crystal structure.
The Dragunov sniper rifle (formal Снайперская Винтовка системы Драгунова образца 1963 года Snayperskaya Vintovka sistem'y Dragunova obraz'tsa 1963 goda (SVD-63), officially "Sniper Rifle, System of Dragunov, Model of the Year 1963") is a semi-automatic sniper/designated marksman rifle chambered in 7.62×54mmR and developed in the Soviet Union.
An electric battery is a device consisting of one or more electrochemical cells with external connections provided to power electrical devices such as flashlights, smartphones, and electric cars.
EOTech is an American company that designs, manufactures, and markets electro-optic products and systems.
External ballistics or exterior ballistics is the part of ballistics that deals with the behavior of a projectile in flight.
A filar micrometer is a specialized eyepiece used in astronomical telescopes for astrometry measurements, in microscopes for specimen measurements, and in alignment and surveying telescopes for measuring angles and distances on nearby objects.
A film, also called a movie, motion picture, moving pícture, theatrical film, or photoplay, is a series of still images that, when shown on a screen, create the illusion of moving images.
A firearm is a portable gun (a barreled ranged weapon) that inflicts damage on targets by launching one or more projectiles driven by rapidly expanding high-pressure gas produced by exothermic combustion (deflagration) of propellant within an ammunition cartridge.
The FN P90, also known as the FN Project 1990, is a personal defense weapon (PDW) designed and manufactured by FN Herstal in Belgium.
A focusing screen is a flat translucent material, either a ground glass or fresnel lens, found in a system camera that allows the user of the camera to preview the framed image in a viewfinder.
Glass is a non-crystalline amorphous solid that is often transparent and has widespread practical, technological, and decorative usage in, for example, window panes, tableware, and optoelectronics.
The graphical user interface (GUI), is a type of user interface that allows users to interact with electronic devices through graphical icons and visual indicators such as secondary notation, instead of text-based user interfaces, typed command labels or text navigation.
A gridiron is a metal grate with parallel bars typically used for grilling meat, fish, vegetables, or combinations of such foods.
A holographic weapon sight or holographic diffraction sight is a non-magnifying gun sight that allows the user to look through a glass optical window and see a reticle image superimposed at a distance on the field of view.
Holography is the science and practice of making holograms.
Iron sights are a system of shaped alignment markers (usually metal) used as a sighting device to assist in the aiming of a device such as a firearm, crossbow, or telescope, and exclude the use of optics as in reflector (reflex) sights, holographic sights, and telescopic sights.
A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.
A laser diode, (LD), injection laser diode (ILD), or diode laser is a semiconductor device similar to a light-emitting diode in which the laser beam is created at the diode's junction.
A level is a surveying optical instrument used to establish or verify points in the same horizontal plane.
Light tubes (also known as light pipes or tubular skylights) are physical structures used for transmitting or distributing natural or artificial light for the purpose of illumination, and are examples of optical waveguides.
A light-emitting diode (LED) is a two-lead semiconductor light source.
Mary Babnik Brown (November 22, 1907 – April 14, 1991) was an American who became known for having donated her hair to the United States military during World War II.
A microscope slide is a thin flat piece of glass, typically 75 by 26 mm (3 by 1 inches) and about 1 mm thick, used to hold objects for examination under a microscope.
A milliradian, often called a mil or mrad, is an SI derived unit for angular measurement which is defined as a thousandth of a radian (0.001 radian).
Night vision is the ability to see in low-light conditions.
An optical axis is a line along which there is some degree of rotational symmetry in an optical system such as a camera lens or microscope.
An optical fiber or optical fibre is a flexible, transparent fiber made by drawing glass (silica) or plastic to a diameter slightly thicker than that of a human hair.
Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines.
Philippe de La Hire (or Lahire, La Hyre or Phillipe de La Hire) (18 March 1640 – 21 April 1718) Benezit Dictionary of Artists.
A photomask is an opaque plate with holes or transparencies that allow light to shine through in a defined pattern.
Polar alignment is the act of aligning the rotational axis of a telescope's equatorial mount or a sundial's gnomon with a celestial pole to parallel Earth's axis.
Polaris, designated Alpha Ursae Minoris (Ursae Minoris, abbreviated Alpha UMi, UMi), commonly the North Star or Pole Star, is the brightest star in the constellation of Ursa Minor.
Radar is an object-detection system that uses radio waves to determine the range, angle, or velocity of objects.
A red dot sight is a common classification for a type of non-magnifying reflector (or reflex) sight for firearms, and other devices that require aiming, that gives the user an aimpoint in the form of an illuminated red dot.
Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated.
A reflector sight or reflex sight is an optical device that allows the user to look through a partially reflecting glass element and see an illuminated projection of an aiming point or some other image superimposed on the field of view.
Refraction is the change in direction of wave propagation due to a change in its transmission medium.
Reticulum is a small, faint constellation in the southern sky.
Robert Hooke FRS (– 3 March 1703) was an English natural philosopher, architect and polymath.
The SA80 is a British family of 5.56×45mm NATO small arms, all of which are selective fire, gas-operated assault rifles.
A sight is an aiming device used to assist in visually aligning ranged weapons, surveying instruments or optical illumination equipments with the intended target.
A sniper is a military/paramilitary marksman who operates to maintain effective visual contact with the enemy and engage targets from concealed positions or at distances exceeding their detection capabilities.
Spherical aberration is an optical effect observed in an optical device (lens, mirror, etc.) that occurs due to the increased refraction of light rays when they strike a lens or a reflection of light rays when they strike a mirror near its edge, in comparison with those that strike close to the centre.
Stadia marks, also called stadia lines or stadia hairs, are crosshairs on the reticle of a theodolite or other surveying instrument that allow stadiametric rangefinding.
Stadiametric rangefinding, or the stadia method is a technique of measuring distances with a telescopic instrument.
The Sight Unit Small Arms, Trilux, or SUSAT, is a 4× telescopic sight, with tritium-powered illumination utilised at dusk or dawn.
A telescopic sight, commonly called a scope, is an optical sighting device that is based on a refracting telescope.
A theodolite is a precision instrument for measuring angles in the horizontal and vertical planes.
Tritium (or; symbol or, also known as hydrogen-3) is a radioactive isotope of hydrogen.
The vertical bar (|) is a computer character and glyph with various uses in mathematics, computing, and typography.
William Gascoigne (1612 – 2 July 1644) was an English astronomer, mathematician and maker of scientific instruments from Middleton, Leeds who invented the micrometer.