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Glass Material
CONTROLS: Index and dispersion variation in optical glass
RELATED TERMS: Homogeneity, bubble grade, striae grade, stress birefringence, international code, 6-digit code
UNITS: Dimensionless
SPECIFICATIONS MUST CONTAIN: Nominal value and linear tolerance (Dispersion tolerance typically given a percentage)
OPTIMAX PREFERRED SPECIFICATION: Nd and Vd
REASONS: Correlates with international code, information widely available
MANUFACTURING STANDARDS: MIL-G-174, ISO 10110-4, OEOSC OP3.001-2001
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Learn from the Experts
Find out more by downloading our technical note on Glass Quality
Optical Glass: Substitutes Versus Equivalents
This paper details the motivation for selecting alternate optical materials within an established design and offers considerations when doing so.