Overview
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Glossary of Technical Terms
QSSE Certificates

Glossary of technical terms


A


  • Abbe number (V value, or constringence)
  • Aberrations, chromatic
  • Absorption
  • Addition
  • Annealing (See also Lehr, annealing)
  • Anti-reflective (AR) coating
  • Anti-scratch coating: See Hard Coating (HC)

B


  • Barium glasses
  • Beryl
  • Blanks: See Semi-finished blanks
  • Borosilicate glass
  • Boss (Block)

C


  • Composite
  • Composition
  • Constringence (See Abbe number)
  • Crown
  • Crucible
  • Crystal
  • Cullet
  • Curing

D


  • Darkening
  • Delivery tube
  • Dispersion (See also: Aberrations, chromatic)

F


  • Fading
  • Fixed tint glasses
  • Flint
  • Frequency of light

G


  • Generating
  • Glare
  • «Guinandage» - Stirring (after its inventor Mr. P.-L.GUINAND)

H


  • Hard Coating (HC)
  • High-index glasses
  • High index: See Mid-index and high-index lenses

I


  • In-mass: See Photochromic in-mass technology
  • Isotropism

L


  • Lanthanum glass (See High-index glasses)
  • Lead glasses (See Crystal, Flint)
  • Lehr, annealing
  • Linear thermal expansion coefficient

M


  • Mid-index and high-index lenses
  • Mineral glass
  • Mold
  • Molding (pressing or «blank»)
  • Monomers - Polymers

N


  • Nylon

O


  • OHSAS (Occupational Health and Safety Assessment Series)
  • Organic compound
  • Organic glass

P


  • Parison
  • Photochromic dye
  • Photochromic in-mass technology
  • Photochromic plastic resin
  • Photochromism (photochromicity)
  • Plastic lenses
  • Platinum
  • Plunger
  • Poise (See also Viscosity)
  • Polarized glass
  • Polishing
  • Polycarbonate lenses

R


  • Refractive index

S


  • Shears
  • Silver halide
  • Smoothing (fine grinding)
  • Soda-lime glasses
  • Substrate

T


  • Titanium glasses (See High Index glasses)
  • Top-siding (of a fused bifocal lens)
  • Torr
  • Transmission
  • True density

V


  • Viscosity
  • Vitroceramics - Glass ceramics

W