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  2. Ballistic eyewear - Wikipedia

    en.wikipedia.org/wiki/Ballistic_eyewear

    Example of ballistic eyewear that can be made with prescription lenses (from U.S. Army APEL [1] list). Another example of ballistic eyewear from the U.S. Army Approved Protective Eyewear List (APEL). [1] Safety glasses, sunglasses and goggles that claim to meet ballistic safety standards are widely available. Some can accommodate prescription ...

  3. Emergency vehicle lighting - Wikipedia

    en.wikipedia.org/wiki/Emergency_vehicle_lighting

    Red is the most used color on Japanese emergency vehicles. Japanese police use light bars mounted on a raised (mechanical) platform to make them more visible over congested streets. Rotating lights are most commonly used. But some newer vehicles have LED light bars installed. Vehicles with any other light color than red are security or engineers.

  4. Bombardier Recreational Products - Wikipedia

    en.wikipedia.org/wiki/Bombardier_Recreational...

    The Traxter and Quest (no longer in production) had two engine sizes 500cc and 650cc. The Rally (also no longer in production) was available with a 200cc engine. The Outlander is a utility style ATV available in multiple engine sizes, including 400cc and 450cc single cylinder and 500cc, 570cc, 650cc, 800cc, 850cc and 1000cc V-Twin engines. The ...

  5. Barlow lens - Wikipedia

    en.wikipedia.org/wiki/Barlow_lens

    Cone of light behind an achromatic doublet objective lens (A) without (red) and with (green) a Barlow lens optical element (B). The Barlow lens, named after Peter Barlow, is a diverging lens which, used in series with other optics in an optical system, increases the effective focal length of an optical system as perceived by all components that are after it in the system.

  6. Corrective lens - Wikipedia

    en.wikipedia.org/wiki/Corrective_lens

    A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia. Glasses or "spectacles" are worn on the face a short distance in front of the eye. Contact lenses are worn directly on the surface of the eye.

  7. Corrective Optics Space Telescope Axial Replacement

    en.wikipedia.org/wiki/Corrective_Optics_Space...

    The Corrective Optics Space Telescope Axial Replacement (COSTAR) is an optical correction instrument designed and built by NASA. It was created to correct the spherical aberration of the Hubble Space Telescope ' s primary mirror , which incorrectly focused light upon the Faint Object Camera (FOC), Faint Object Spectrograph (FOS), and Goddard ...