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Microfiber cloths are also used to clean photographic lenses as they absorb oily matter without being abrasive or leaving a residue, and are sold by major manufacturers such as Sinar, ZEISS, Nikon and Canon. Small microfiber cleaning cloths are commonly sold for cleaning computer screens, cameras, phones and eyeglasses. Cloth for cleaning glasses
Didymium glasses. Didymium (Greek: δίδυμο, twin) is a mixture of the elements praseodymium and neodymium.It is used in safety glasses for glassblowing and blacksmithing and filter lenses for flame testing, especially with a gas ()-powered forge, where it provides a filter that selectively blocks the yellowish light at 589 nm emitted by the hot sodium in the glass without having a ...
Man with glasses. A woman with glasses. Glasses, also known as eyeglasses or spectacles, are vision eyewear with clear or tinted lenses mounted in a frame that holds them in front of a person's eyes, typically utilizing a bridge over the nose and hinged arms, known as temples or temple pieces, that rest over the ears for support.
Cubitts, established in 2012, is an eyeglass manufacturer based in Kings Cross, London, England. The company creates handcrafted frames, and sunglasses, constructed with custom pins that secure the acetate based on a rivet designed by Lewis Cubitt, one of the three Cubitt brothers who inspired the brand name. The pin drilling process is done by ...
The most common type of optical glass is crown glass, which has an index of refraction of about 1.52. An optimal single-layer coating would have to be made of a material with an index of about 1.23. An optimal single-layer coating would have to be made of a material with an index of about 1.23.
Porous glass is glass that includes pores, usually in the nanometre- or micrometre-range, commonly prepared by one of the following processes: through metastable phase separation in borosilicate glasses (such as in their system SiO 2-B 2 O 3-Na 2 O), followed by liquid extraction of one of the formed phases; [1] [2] through the sol-gel process; or simply by sintering glass powder.