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  2. Optical glass - Wikipedia

    en.wikipedia.org/wiki/Optical_glass

    Optical glass refers to a quality of glass suitable for the manufacture of optical systems such as optical lenses, prisms or mirrors.Unlike window glass or crystal, whose formula is adapted to the desired aesthetic effect, optical glass contains additives designed to modify certain optical or mechanical properties of the glass: refractive index, dispersion, transmittance, thermal expansion and ...

  3. List of lens designs - Wikipedia

    en.wikipedia.org/wiki/List_of_lens_designs

    This list covers optical lens designs grouped by tasks or overall type. The field of optical lens designing has many variables including the function the lens or group of lenses have to perform, the limits of optical glass because of the index of refraction and dispersion properties, and design constraints including realistic lens element center and edge thicknesses, minimum and maximum air ...

  4. Precision glass moulding - Wikipedia

    en.wikipedia.org/wiki/Precision_glass_moulding

    Precision glass moulding is a replicative process that allows the production of high precision optical components from glass without grinding and polishing. The process is also known as ultra-precision glass pressing. It is used to manufacture precision glass lenses for consumer products such as digital cameras, and high-end products like ...

  5. Glasses - Wikipedia

    en.wikipedia.org/wiki/Glasses

    Depending on the company, these computer or gaming glasses can also filter out high energy blue and ultra-violet light from LCD screens, fluorescent lighting, and other sources of light. This allows for reduced eye-strain. [11] These glasses can be ordered as standard or prescription lenses that fit into standard optical frames. [12]

  6. Windsor glasses - Wikipedia

    en.wikipedia.org/wiki/Windsor_glasses

    Eyeglass lenses were historically made of glass and had to be ground against an abrasive surface to fit the shape of the eyerims. Getting the lens to fit an irregularly shaped eyerim required skill and specialised equipment. The simplicity of carving a circle meant that circular lenses were generally cheaper to produce. Modern lenses are ...

  7. Photochromic lens - Wikipedia

    en.wikipedia.org/wiki/Photochromic_lens

    A photochromic lens is an optical lens that darkens on exposure to light of sufficiently high frequency, most commonly ultraviolet (UV) radiation. In the absence of activating light, the lenses return to their clear state. Photochromic lenses may be made of polycarbonate, or another plastic. Glass lenses use visible light to darken.

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