Difference between revisions of "Dichroic glass"
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== Description == | == Description == | ||
| − | A type of glass that will reflect and transmit different wavelengths of light, thus visually appearing as different colors in reflected and transmitted light. Since glass is not crystalline, the dichroic effect is achieved by coating thin layers of various chemicals on the surface of clear glass. Examples of the chemicals are: [http://cameo.mfa.org/materials/fullrecord.asp?name=zinc | + | A type of glass that will reflect and transmit different wavelengths of light, thus visually appearing as different colors in reflected and transmitted light. Since glass is not crystalline, the dichroic effect is achieved by coating thin layers of various chemicals on the surface of clear glass. Examples of the chemicals are: [http://cameo.mfa.org/materials/fullrecord.asp?name=zinc%20sulfate zinc sulfate], [http://cameo.mfa.org/materials/fullrecord.asp?name=magnesium%20fluoride magnesium fluoride], [http://cameo.mfa.org/materials/fullrecord.asp?name=gold gold], [http://cameo.mfa.org/materials/fullrecord.asp?name=copper copper], [http://cameo.mfa.org/materials/fullrecord.asp?name=nickel nickel], [http://cameo.mfa.org/materials/fullrecord.asp?name=cobalt%20oxide cobalt oxide], [http://cameo.mfa.org/materials/fullrecord.asp?name=ferric%20oxide iron oxide], [http://cameo.mfa.org/materials/fullrecord.asp?name=chromic%20oxide chromic oxide], or [http://cameo.mfa.org/materials/fullrecord.asp?name=titanium%20dioxide titanium dioxide]. The oldest known example of dichroic glass is the Lycurgis Cup from the 4th century. It appears a dull green in reflected light and a deep wine color in transmitted light. Another example is [http://cameo.mfa.org/materials/fullrecord.asp?name=Alexandrit%20glass Alexandrit glass] produced in Bohemia in the early 1900s. Currently dichroic films are being used in lamps ([http://cameo.mfa.org/materials/fullrecord.asp?name=dichroic%20reflector%20spotlight dichroic reflector spotlight]) and solar control windows ([http://cameo.mfa.org/materials/fullrecord.asp?name=Low-E%20glass%20coating Low-E glass]) for energy savings. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
| − | dicroic glass (sp); verre | + | dicroic glass (sp); verre dichroïque (Fr.); vidro dicróico (Port.) |
== Hazards and Safety == | == Hazards and Safety == | ||
Revision as of 06:35, 24 July 2013
Description
A type of glass that will reflect and transmit different wavelengths of light, thus visually appearing as different colors in reflected and transmitted light. Since glass is not crystalline, the dichroic effect is achieved by coating thin layers of various chemicals on the surface of clear glass. Examples of the chemicals are: zinc sulfate, magnesium fluoride, gold, copper, nickel, cobalt oxide, iron oxide, chromic oxide, or titanium dioxide. The oldest known example of dichroic glass is the Lycurgis Cup from the 4th century. It appears a dull green in reflected light and a deep wine color in transmitted light. Another example is Alexandrit glass produced in Bohemia in the early 1900s. Currently dichroic films are being used in lamps (dichroic reflector spotlight) and solar control windows (Low-E glass) for energy savings.
Synonyms and Related Terms
dicroic glass (sp); verre dichroïque (Fr.); vidro dicróico (Port.)
Hazards and Safety
Coatings may deteriorate and change over time.