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  2. Security hologram - Wikipedia

    en.wikipedia.org/wiki/Security_hologram

    The technology here is similar to the technology used for the past 50 years to make red safety night reflectors for bicycles, trucks, and cars. These holograms (and therefore the artwork of these holograms) may be of two layers (i.e. with a background and a foreground) or three layers (with a background, a middle ground and a foreground).

  3. Holographic weapon sight - Wikipedia

    en.wikipedia.org/wiki/Holographic_weapon_sight

    A holographic weapon sight or holographic diffraction sight is a non- magnifying gunsight that allows the user to look through a glass optical window and see a holographic reticle image superimposed at a distance on the field of view. [ 1] The hologram of the reticle is built into the window and is illuminated by a laser diode .

  4. Reflector sight - Wikipedia

    en.wikipedia.org/wiki/Reflector_sight

    A view through the Mark III Free Gun Reflector Sight, first produced in 1943, used on British army guns, naval guns, and as a pilot sight and a defensive gun sight on aircraft. The reticle image in this sight is produced by an optical collimator bounced off a beam splitter. The dot remains on the target even though the viewer's head is moved ...

  5. Holographic optical element - Wikipedia

    en.wikipedia.org/wiki/Holographic_optical_element

    Holographic optical element (HOE) is an optical component (mirror, lens, directional diffuser, etc.) that produces holographic images using principles of diffraction. HOE is most commonly used in transparent displays, 3D imaging, and certain scanning technologies. The shape and structure of the HOE is dependent on the piece of hardware it is ...

  6. Night vision - Wikipedia

    en.wikipedia.org/wiki/Night_vision

    A night vision device (NVD) is a device comprising an image intensifier tube in a rigid casing, commonly used by military forces. Lately, night vision technology has become more widely available for civilian use. For example, enhanced vision systems(EVS) have become available for aircraft, to augment the situational awareness of pilots to ...

  7. Holography - Wikipedia

    en.wikipedia.org/wiki/Holography

    Holography. Holography is a technique that enables a wavefront to be recorded and later reconstructed. It is best known as a method of generating three-dimensional images, and has a wide range of other uses, including data storage, microscopy, and interferometry. In principle, it is possible to make a hologram for any type of wave .

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