optical crown

Definitions

  • WordNet 3.6
    • n optical crown optical glass of low dispersion and low refractive index
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Usage

In literature:

Nevertheless, disks of optical glass, both crown and flint, have been produced up to 39 in.
"Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 1" by Various
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In news:

Fashion Optical Displays introduces sleek wall displays—Paramount, with traditional crown molding, and Aspire , with rounded, more contemporary molding.
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