Quick answer
A lateral calibration standard is a physical artifact with known dimensions used to verify the lateral (X-Y) measurement accuracy of an optical profiler or interferometer. The Zygo Lateral Calibration Standard provides a simple, non-certified reference for routine scale checks.
Why lateral calibration matters
Lateral measurements — distances and positions in the plane of the sample — are just as critical as vertical (Z) measurements in surface metrology. Without a reliable lateral reference, even a well-aligned interferometer can produce misleading feature sizes, pitch errors, or distorted surface maps.
A lateral calibration standard gives you a known pattern (such as a millimeter rule) to check that your instrument's XY stage and imaging system report the correct distances. Regular use catches drift, stage backlash, or pixel scaling errors before they affect your data.
What the Zygo Lateral Calibration Standard includes
The Zygo Lateral Calibration Standard is a basic, non-certified microscope slide printed with a millimeter rule. It is designed for quick, everyday verification rather than formal traceable calibration. Because it lacks a certificate, it is best suited for in-house consistency checks and operator training, not for audits requiring documented traceability.
Diagnosing lateral measurement errors
- Symptom: Measured feature widths or distances do not match expected values; surface maps show consistent stretching or compression in one direction.
- Likely cause: Incorrect pixel scaling, stage calibration drift, or optical magnification error. The XY measurement chain has lost its reference.
- Corrective action: Place the Zygo Lateral Calibration Standard on the stage, focus on the millimeter rule, and measure a known interval (e.g., 1 mm). Compare the measured value to the expected value. If the error exceeds your acceptable tolerance, adjust the instrument's lateral calibration factor in MetroPro or contact Zygo support. Record the measured error and the date. Repeat weekly to track drift.
- When to stop or choose another option: If your application requires ISO 17025 traceability or a documented calibration certificate, the non-certified Zygo Lateral Calibration Standard is not sufficient. In that case, use a certified lateral standard with a traceable calibration report. For audit-grade traceability, invest in a certified standard and keep the calibration certificate on file.
Product facts
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Lateral Calibration Standard: The ZYGO Lateral Calibration Standard is a basic, non-certified microscope slide printed with a millimeter rule. It provides a simple, repeatable reference for verifying lateral scale accuracy on Zygo instruments, but because it is not certified, it does not replace a formal calibration standard for compliance purposes.
Lateral Calibration Standard
