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  2. Leica CL - Wikipedia

    en.wikipedia.org/wiki/Leica_CL

    121 mm × 76 mm × 32 mm (4.8 in × 3.0 in × 1.3 in) Weight. 365 g (12.9 oz) The Leica CL is a 35mm compact rangefinder camera with interchangeable lenses in the Leica M-mount. It was developed in collaboration with Minolta who manufactured it. It first appeared in April 1973 and was released in the Japanese market in November 1973 as the ...

  3. Hoya Corporation - Wikipedia

    en.wikipedia.org/wiki/Hoya_Corporation

    Hoya Corporation. Hoya Corporation (Hoya株式会社, Hōya Kabushiki-gaisha) is a Japanese company manufacturing optical products such as photomasks, photomask blanks and hard disk drive platters, contact lenses and eyeglass lenses for the health-care market, [4] medical photonics, [5] lasers, photographic filters, medical flexible endoscopy ...

  4. Adjustable-focus eyeglasses - Wikipedia

    en.wikipedia.org/wiki/Adjustable-focus_eyeglasses

    Adjustable focus eyeglasses are eyeglasses with an adjustable focal length. They compensate for refractive errors (such as presbyopia) by providing variable focusing, allowing users to adjust them for desired distance or prescription, or both. Current bifocals and progressive lenses are static, in that the user has to change their eye position ...

  5. Explosive lens - Wikipedia

    en.wikipedia.org/wiki/Explosive_lens

    Explosive lens. A type of modern high explosive lenses without wave shaper. The colored areas are the fast explosive, while the white areas are the slow explosives. In an implosion-type nuclear weapon, polygonal lenses are arranged around the spherical core of the bomb. Thirty-two "points" are shown.

  6. Category:Contact lenses - Wikipedia

    en.wikipedia.org/wiki/Category:Contact_lenses

    The following 27 pages are in this category, out of 27 total. This list may not reflect recent changes .

  7. Luneburg lens - Wikipedia

    en.wikipedia.org/wiki/Luneburg_lens

    A Luneburg lens (original German Lüneburg lens) is a spherically symmetric gradient-index lens. A typical Luneburg lens's refractive index n decreases radially from the center to the outer surface. They can be made for use with electromagnetic radiation from visible light to radio waves . For certain index profiles, the lens will form perfect ...

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