Quartz Glass Quality Control: Ensuring Absolute Integrity

At John Moncrieff, we don’t just make quartz components — we guarantee their performance. Our rigorous quality control framework ensures every piece meets the structural, optical, and chemical standards demanded by leading-edge applications.

Material Purity & Chemical Analysis

• High-Purity Verification: Analytical testing to confirm ≥ 99.99% SiO₂ content.
• Trace Impurity Screening: ICP / spectrochemical assays to detect contaminants.
• Chemical Stability Tests: Exposure to acid / alkali atmospheres to validate corrosion resistance.

Dimensional & Geometric Certification

• Tolerance Checking: Precise measurement of thickness, diameter, flatness, concentricity.
• Surface Flatness & Parallelism: Interferometry and optical flat references for critical optics.
• Edge & Corner Inspection: Microscope assessment of bevels, chips, and edge quality.

Optical & Transmission Performance

• Light Transmission Testing: UV-VIS-IR spectrophotometry across target wavelengths.
• Scatter & Haze Evaluation: Quantification of stray light and surface scattering.
• Refractive Index Uniformity: Monitoring for gradient or inhomogeneity.

Thermal & Mechanical Integrity

• Thermal Shock Resistance: Controlled cycles of heating / cooling to validate robustness.
• Mechanical Strength Testing: Biaxial bending, fracture testing as required.
• Stress Birefringence Analysis: Polariscopic inspection to identify internal stress zones.

Our quality control records and certificates are traceable and auditable. Should you require ISO certificates, material test reports (MTRs), or batch-specific documentation, our team will furnish them on request.