Types of Glass

Optical Glass

Optical glasses will be found in scientific instruments, microscopes, fighter aircraft and most commonly in spectacles.

The most important properties are the refractive index and the dispersion:

  • Refractive index is a measure of how much the glass bends light.
  • Dispersion is a measure of the way the glass splits white light into the colours of the rainbow.

Glass makers use the variations in these characteristics to develop optical glasses.

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Because of the differences in the various methods of manufacture, the industry is divided into 5 main sections under the general headings: Container glass; flat glass; scientific/technical glass; domestic glass; and fibre glass.


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