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  2. Total station - Wikipedia

    en.wikipedia.org/wiki/Total_station

    Total station. A typical prism with back target. Used with survey and 3D point monitoring systems to measure changes in elevation and position of a point. A total station or total station theodolite is an electronic/optical instrument used for surveying and building construction.

  3. Liquid-crystal display - Wikipedia

    en.wikipedia.org/wiki/Liquid-crystal_display

    Vertical-alignment displays are a form of LCDs in which the liquid crystals naturally align vertically to the glass substrates. When no voltage is applied, the liquid crystals remain perpendicular to the substrate, creating a black display between crossed polarizers.

  4. Fresnel lens - Wikipedia

    en.wikipedia.org/wiki/Fresnel_lens

    A Fresnel lens ( / ˈfreɪnɛl, - nəl / FRAY-nel, -⁠nəl; / ˈfrɛnɛl, - əl / FREN-el, -⁠əl; or / freɪˈnɛl / fray-NEL [1]) is a type of composite compact lens which reduces the amount of material required compared to a conventional lens by dividing the lens into a set of concentric annular sections.

  5. List of common display resolutions - Wikipedia

    en.wikipedia.org/wiki/List_of_common_display...

    The horizontal to vertical ratio of each pixel. Storage aspect ratio (SAR) The horizontal to vertical ratio of solely the number of pixels in each direction. Display aspect ratio (DAR) The combination (which occurs by multiplication) of both the pixel aspect ratio and storage aspect ratio giving the aspect ratio as experienced by the viewer.

  6. E Ink - Wikipedia

    en.wikipedia.org/wiki/E_Ink

    Resolution (horizontal × vertical) 240 × 240 256 × 256 128 × 296 360 × 600 480 × 800 540 × 960 540 × 960 1072 × 1448 1080 × 1440 1404 × 1872 1404 × 1872 1650 × 2200 1440 × 2560 2160 × 2880 Aspect ratio Round 1:1 2:1 5:3 5:3 16:9 16:9 4:3 4:3 4:3 4:3 4:3 16:9 4:3 Active area (mm) 27.96 × 27.96 23.30 × 23.30 14.46 × 33.45

  7. Periscope - Wikipedia

    en.wikipedia.org/wiki/Periscope

    e Lens of the observer's eye. f Right-angled prism. g Image-erecting prism. A periscope is an instrument for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation from an observer's current position.