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Hirotake Arai's son Michio had spent time in the United States, [2] recognizing a potential market for their helmets (which was dominated by Bell at the time). Arai was approached by New Jersey–based motorsport accessory retailer Roger Weston, [3] [4] [5] who later managed the Arai Helmet Americas division, [6] with a goal to recruit an American racer from the Daytona 200 to wear an Arai helmet.
The Integrated Helmet and Display Sight System (IHADSS) 30 mm M230 chain gun turret on a Boeing AH-64 Apache being aimed with a helmet-mounted sight A helmet-mounted display (HMD) is a headworn device that uses displays and optics to project imagery and/or symbology to the eyes.
A visor (also spelled vizor) is a surface that protects the eyes, such as shading them from the sun or other bright light or protecting them from objects. Nowadays many visors are transparent, but before strong transparent substances such as polycarbonate were invented, visors were opaque like a mask .
The first recorded European reference to a helmet's visor in the Middle Ages is found in the 1298 will of Odo de Roussillon, which speaks of a heume a vissere. [4] Whether this statement refers to a pivoting visor or a fixed faceplate is not clear; but by the early fourteenth century artistic depictions of moving visors appear quite frequently ...
Comparison of visible wavelength dispersion (i.e., the distance between foci for blue and red) of crown and flint glass converging lenses. Low-dispersion glass (LD glass) is a type of glass with reduced chromatic aberration, meaning the refractive index does not change as strongly with different wavelengths of light.
Man with glasses. A woman with glasses. Glasses, also known as eyeglasses or spectacles, are vision eyewear with clear or tinted lenses mounted in a frame that holds them in front of a person's eyes, typically utilizing a bridge over the nose and hinged arms, known as temples or temple pieces, that rest over the ears for support.
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