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  2. Optical disc - Wikipedia

    en.wikipedia.org/wiki/Optical_disc

    First movies on Blu-ray Discs were released in June 2006. [25] Blu-ray eventually prevailed in a high definition optical disc format war over a competing format, the HD DVD. A standard Blu-ray disc can hold about 25 GB of data, a DVD about 4.7 GB, and a CD about 700 MB. Comparison of various optical storage media

  3. Condenser (optics) - Wikipedia

    en.wikipedia.org/wiki/Condenser_(optics)

    It contains two lenses that produce an image of the light source that is surrounded by a blue and red color at its edges. The aplanatic condenser is corrected for spherical aberration. The compound achromatic condenser is corrected for both spherical and chromatic aberrations.

  4. Accommodation reflex - Wikipedia

    en.wikipedia.org/wiki/Accommodation_reflex

    Light from a single point of a distant object and light from a single point of a near object being brought to a focus. The accommodation reflex (or accommodation-convergence reflex) is a reflex action of the eye, in response to focusing on a near object, then looking at a distant object (and vice versa), comprising coordinated changes in vergence, lens shape (accommodation) and pupil size.

  5. Optics - Wikipedia

    en.wikipedia.org/wiki/Optics

    Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it. [1]

  6. Night-vision device - Wikipedia

    en.wikipedia.org/wiki/Night-vision_device

    The electrons are drawn to the higher-voltage phosphor screen (green). Electrons that strike the phosphor screen cause the phosphor to produce photons of light viewable through the eyepiece lenses. OMNI, or OMNIBUS, refers to a series of contracts through which the US Army purchased GEN III night vision devices.

  7. Infrared - Wikipedia

    en.wikipedia.org/wiki/Infrared

    Infrared light sources can be used to augment the available ambient light for conversion by night vision devices, increasing in-the-dark visibility without actually using a visible light source. [32] The use of infrared light and night vision devices should not be confused with thermal imaging, which creates images based on differences in ...

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