ASTM E1967

ASTM E1967 is the ASTM standard for the automated determination of refractive index in glass samples using the oil immersion method and a phase contrast microscope. It provides a technical framework for measuring this optical property in a controlled, repeatable way, which matters for glass characterization, quality control, and product comparison. By focusing on an automated approach, the standard supports more consistent test results while helping laboratories follow a recognized method for evaluating glass samples.

ASTM E1967 standard overview

The official title, Standard Test Method for the Automated Determination of Refractive Index of Glass Samples Using the Oil Immersion Method and a Phase Contrast Microscope, indicates a laboratory test method centered on optical measurement. ASTM E1967 is used to define how refractive index is determined from glass samples with an oil immersion technique, supported by phase contrast microscopy and automation. That combination suggests a structured method intended to improve consistency, reduce operator variability, and support reliable comparison of glass materials.

Where is ASTM E1967 used?

This standard is commonly used in laboratories that evaluate glass samples for optical properties and material consistency. It is relevant wherever refractive index data is needed for glass testing, product characterization, or acceptance checks tied to laboratory workflows. Because the method uses oil immersion and a phase contrast microscope, it is especially suited to test environments equipped for microscopy and precision measurement. ASTM E1967 may also support internal quality procedures where repeatable optical testing is important.

Practical importance of ASTM E1967

In practice, ASTM E1967 helps organizations obtain a recognized and repeatable method for measuring glass refractive index. That can improve consistency across testing programs, support procurement or specification review, and reduce uncertainty when comparing glass samples. For quality control teams, a standardized method can make results easier to document and audit. It also helps limit variation caused by different test practices, which is valuable when reliable optical data is needed for evaluation or compliance purposes.

• Automated refractive index measurement
• Oil immersion method for glass samples
• Phase contrast microscope-based testing
• Laboratory quality control and comparison
• Repeatable optical property evaluation