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Definition of Optical crown
1. Noun. Optical glass of low dispersion and low refractive index.
Lexicographical Neighbors of Optical Crown
Literary usage of Optical crown
Below you will find example usage of this term as found in modern and/or classical literature:
1. Ures̓ Dictionary of Arts, Manufactures, and Mines: Containing a Clear by Andrew Ure (1860)
"optical crown glass should be perfectly limpid, and have so little colour, that
a pretty thick piece of it may give no appreciable tinge to the rays of ..."
2. Industrial Chemistry: A Manual for Use in Technical Colleges Or Schools and by Anselme Payen, Payen (Anselme) (1878)
"The manufacture of optical crown glass is conducted essentially in the same way
as that of flint glass; but on account of the greater heat required, ..."
3. The Observatory (1885)
"The Fellows will recollect that a few months ago there was a remark made here
publicly that the celebrated manufactory of optical crown-glass in Paris was ..."
4. Astronomical Register (1885)
"of optical crown glass at Paris was untrustworthy. At the beginning of this year,
I (jot a letter from M. Chas. Feil in which he requested ..."
5. Monthly Notices of the Royal Astronomical Society by Royal Astronomical Society (1868)
"Both these lenses should be either achromatic, or else made of optical crown
glass of the lowest dispersive power. ..."
6. Surveying and Levelling Instruments: Theoretically and Practically Described by William Ford Robinson Stanley (1901)
"For cheapness the optical crown- glass is often replaced by common plate-glass.
A new kind of glass, recently made by Shott of Jena, is specially clear and ..."
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