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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. File:Border Range.pdf - Wikipedia

    en.wikipedia.org/wiki/File:Border_Range.pdf

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

  4. Precision glass moulding - Wikipedia

    en.wikipedia.org/wiki/Precision_glass_moulding

    Precision glass moulding: In this step the preform is directly formed into an optical glass lens. It is necessary to clean the glass preform and the mould before starting the process, but there is no polishing or post-machining required. Lens coating: An antireflection coating is applied to the finished lenses. The lenses are first cleaned, and ...

  5. Calculation of glass properties - Wikipedia

    en.wikipedia.org/wiki/Calculation_of_glass...

    The calculation of glass properties allows "fine-tuning" of desired material characteristics, e.g., the refractive index. [1]The calculation of glass properties (glass modeling) is used to predict glass properties of interest or glass behavior under certain conditions (e.g., during production) without experimental investigation, based on past data and experience, with the intention to save ...

  6. Photographic lens design - Wikipedia

    en.wikipedia.org/wiki/Photographic_lens_design

    The new Jena optical glass also opened up the possibility of increased performance of photographic lenses. The first use of Jena glass in a photographic lens was by Voigtländer, but as the lens was an old design its performance was not greatly improved.

  7. Glass code - Wikipedia

    en.wikipedia.org/wiki/Glass_code

    The international glass code is based on U.S. military standard MIL-G-174, and is a six-digit number specifying the glass according to its refractive index n d at the Fraunhofer d- (or D 3-) line, 589.3 nm, and its Abbe number V d also taken at that line.

  8. Thin-film optics - Wikipedia

    en.wikipedia.org/wiki/Thin-film_optics

    Hafnium oxidized ingots which exhibits thin film optical effects. Thin-film optics is the branch of optics that deals with very thin structured layers of different materials. [ 1 ] In order to exhibit thin-film optics, the thickness of the layers of material must be similar to the coherence length ; for visible light it is most often observed ...

  9. Thoriated glass - Wikipedia

    en.wikipedia.org/wiki/Thoriated_glass

    Thoriated glass is a glass material used in the manufacture of optical systems, specifically photographic lenses. It is useful to this process due to its high refractive index . Thoriated glass is radioactive due to the inclusion of thorium dioxide , oxide of radioactive element thorium .