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2. Vortex Optics - Wikipedia

   en.wikipedia.org/wiki/Vortex_Optics

   Vortex Optics is an American manufacturer of special optical equipments for hunting, wildlife watching, outdoor recreation, shooting sports and law enforcement and military. [ 1] Vortex products include binoculars, spotting scopes, riflescopes, reflex sights, holographic sights and other accessories. It once had a sister company known as Eagle ...

3. Spotting scope - Wikipedia

   en.wikipedia.org/wiki/Spotting_scope

   Spotting scope. A 100mm spotting scope with a paraxial 30mm finderscope. A spotting scope is a compact lightweight portable telescope optimized for detailed observation of distant objects. [1] They are used as tripod mounted optical enhancement devices for various outdoor activities such as birdwatching, skygazing and other naturalist ...

4. Binoculars - Wikipedia

   en.wikipedia.org/wiki/Binoculars

   Binoculars or field glasses are two refracting telescopes mounted side-by-side and aligned to point in the same direction, allowing the viewer to use both eyes (binocular vision) when viewing distant objects. Most binoculars are sized to be held using both hands, although sizes vary widely from opera glasses to large pedestal-mounted military ...

5. List of military electronics of the United States - Wikipedia

   en.wikipedia.org/wiki/List_of_military...

   AN/PVS-23: Harris Night Vision Binocular ... (Miniature Aiming System-Day Optic; Squad Variable Power Scope), is based on Vortex Razor HD Gen II-E 1-6x24mm [232]

6. Holographic weapon sight - Wikipedia

   en.wikipedia.org/wiki/Holographic_weapon_sight

   For example, the Vortex Razor AMG UH-1 holographic sight has been quoted as having an expected battery life of 1,000 to 1,500 hours (1½ to 2 months) on medium setting. [9] The Aimpoint CompM5s red dot sight has an expected battery life of around 8,000 to 50 000 hours (1 to 5 years) depending on the setting.

7. Optical vortex - Wikipedia

   en.wikipedia.org/wiki/Optical_vortex

   An optical vortex (also known as a photonic quantum vortex, screw dislocation or phase singularity) is a zero of an optical field; a point of zero intensity. The term is also used to describe a beam of light that has such a zero in it. The study of these phenomena is known as singular optics .