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  2. Fluoride glass - Wikipedia

    en.wikipedia.org/wiki/Fluoride_glass

    Since fluoride glasses have heavier ions than their silica counterpart, there are lower vibration frequencies that correspond to a longer infrared absorption edge. [6] [7] The extrinsic sources of loss come mainly from crystallite scattering and impurity absorption. The main extrinsic source of loss comes from crystallite scattering.

  3. 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 ...

  4. Infrared cut-off filter - Wikipedia

    en.wikipedia.org/wiki/Infrared_cut-off_filter

    Infrared cut-off filters, sometimes called IR filters or heat-absorbing filters, are designed to reflect or block near-infrared wavelengths while passing visible light. They are often used in devices with bright incandescent light bulbs (such as slide and overhead projectors ) to prevent unwanted heating.

  5. Here’s what can happen when you view an eclipse incorrectly ...

    www.aol.com/news/protect-eyes-during-annular...

    The lenses of solar eclipse glasses are made of black polymer, or resin infused with carbon particles, that blocks nearly all visible, infrared and ultraviolet light, according to The Planetary ...

  6. Optical filter - Wikipedia

    en.wikipedia.org/wiki/Optical_filter

    Infrared cut-off filters are designed to block or reflect infrared wavelengths but pass visible light. Mid-infrared filters are often used as heat-absorbing filters in devices with bright incandescent light bulbs (such as slide and overhead projectors ) to prevent unwanted heating due to infrared radiation.

  7. 15 Chic Dark Sunglasses That Actually Block Out the Sun - AOL

    www.aol.com/entertainment/15-chic-dark...

    And with summer in full force, you’re going to need those glasses to keep the sun out of your eyes. 21 Flattering Sunglasses That Scream 'I Belong to the Country Club' Before you buy your next ...

  8. Attenuation - Wikipedia

    en.wikipedia.org/wiki/Attenuation

    These factors will determine the capacity of the material transmitting longer wavelengths in the infrared (IR), far IR, radio and microwave ranges. The selective absorption of infrared (IR) light by a particular material occurs because the selected frequency of the light wave matches the frequency (or an integral multiple of the frequency) at ...

  9. Smart glass - Wikipedia

    en.wikipedia.org/wiki/Smart_glass

    When installed in the envelope of buildings, smart glass helps to create climate adaptive building shells, [3] which benefits include things such as natural light adjustment, visual comfort, UV and infrared blocking, reduced energy use, thermal comfort, resistance to extreme weather conditions, and privacy. [4]