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  2. RONJA - Wikipedia

    en.wikipedia.org/wiki/RONJA

    With the brightest variant of Lumileds HPWT-BD00-F4000 LED and 130 mm diameter cheap magnifying glass lenses, the range is 1.4 km (0.87 mi). [5] [17] The dimmer but more affordable E4000 variant of HPWT-BD00 yields 1.3 kilometres (0.81 mi). [18] The speed is always 10 Mbit/s full duplex regardless of the distance.

  3. 50 Inventions From The Past That Were Amazingly Innovative - AOL

    www.aol.com/98-historical-inventions-were-ahead...

    It came with both head and tail lamps, a horn, and even a toolbox. ... a precursor to modern head-mounted displays. Apparently, the idea of television eyeglasses came to the inventor in 1936, but ...

  4. List of instruments used in otorhinolaryngology, head and ...

    en.wikipedia.org/wiki/List_of_instruments_used...

    Head Mirror with head band: to focus light into the cavity under inspection; mirror is concave and is used with a Chiron lamp to produce a parallel beam of light; doctor views through the hole (average diameter of mirror is 3 & 1/2" & that of hole is 1/4") Head mounted lights with head band: to focus light into the cavity under inspection ...

  5. Magnifying glass - Wikipedia

    en.wikipedia.org/wiki/Magnifying_glass

    A pen seen through a magnifying glass Jim Hutton as detective Ellery Queen, posing with a magnifying glass. A magnifying glass is a convex lens that is used to produce a magnified image of an object. The lens is usually mounted in a frame with a handle. Beyond its primary function of magnification, this simple yet ingenious tool serves a ...

  6. Optical head-mounted display - Wikipedia

    en.wikipedia.org/wiki/Optical_head-mounted_display

    Intel announces Vaunt, a set of smart glasses that are designed to appear like conventional glasses and are display-only, using retinal projection. [6] The project was later shut down. [7] Zeiss and Deutsche Telekom partners up to form tooz technologies GmbH to develop optical elements for smart glass displays. [8] [9]

  7. Head-mounted display - Wikipedia

    en.wikipedia.org/wiki/Head-mounted_display

    A head-mounted display (HMD) is a display device, worn on the head or as part of a helmet (see helmet-mounted display for aviation applications), that has a small display optic in front of one (monocular HMD) or each eye (binocular HMD). HMDs have many uses including gaming, aviation, engineering, and medicine.