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  2. Magnetic lens - Wikipedia

    en.wikipedia.org/wiki/Magnetic_lens

    A magnetic lens is a device for the focusing or deflection of moving charged particles, such as electrons or ions, by use of the magnetic Lorentz force. Its strength can often be varied by usage of electromagnets. Magnetic lenses are used in diverse applications, from cathode ray tubes over electron microscopy to particle accelerators.

  3. UltraVision - Wikipedia

    en.wikipedia.org/wiki/UltraVision

    Contact Lens Precision Laboratories (CLPL), was founded in Cambridge in 1967. J. Keith Lomas, who was the company's managing director between 1996 and 2017, oversaw the acquisition of UltraVision in July 2003. [1]

  4. Bionic contact lens - Wikipedia

    en.wikipedia.org/wiki/Bionic_contact_lens

    Early embodiment of contact lens display, Canadian patent application 2280022, 1999 July 28th. A bionic contact lens is a proposed device that could provide a virtual display that could have a variety of uses from assisting the visually impaired to video gaming, as claimed by the manufacturers and developers. [1]

  5. List of Minolta A-mount lenses - Wikipedia

    en.wikipedia.org/wiki/List_of_Minolta_A-mount_lenses

    While the "(D)" designation is used on the box and in the documentation, the lenses just feature a "D" instead. Requires 8 lens contacts; lenses with only 5 contacts cannot support this feature. DT "Digital Technology", lenses for cameras with APS-C (or Super-35mm) size sensors, only. DT lenses will not fully illuminate the sensor/film area of ...

  6. Vision Express - Wikipedia

    en.wikipedia.org/wiki/Vision_Express

    Grand Vision acquired Vision Express in 1997. The French parent company Grand Vision has clinics under various brands across Europe, and the rest of the world. Under franchise agreement there is a strong Vision Express brand present also in Latvian and Lithuanian markets.

  7. Petzval lens - Wikipedia

    en.wikipedia.org/wiki/Petzval_lens

    The Petzval objective, or Petzval lens, is the first photographic portrait objective lens (with a 160 mm focal length) in the history of photography. [1] It was developed by the Slovak mathematics professor Joseph Petzval in 1840 in Vienna , [ 2 ] with technical advice provided by Peter Wilhelm Friedrich von Voigtländer [ de ] .

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