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In optical engineering, a Typical Value represents the statistically average performance based on multiple in-factory measurements of production samples taken under standardized test conditions. It is not a nominal or theoretical figure, but an empirical value obtained from regular spectrophotometric verification.
At Marumi, all transmittance and reflectance data described as Typical Value are verified by factory spectrophotometer measurements, ensuring they accurately reflect real-world, reproducible performance within the product’s manufacturing tolerance range.
Going forward, Marumi will present transmittance, reflectance, and optical performance data using Typical Value specifications—providing you with transparent, reliable performance measurement you can trust.
Any additional specific values will be clearly noted with their measurement context.
Reflectance Values in Details*
In contrast, values presented by other manufacturers without disclosing measurement ranges or conditions may represent nominal or theoretical maximum/minimum figures—or so-called "champion data" —usually not reproducible in mass production —rather than verified typical data based on standardized testing.
Marumi is committed to providing accurate and reliable information to help users make well-informed decisions when selecting our products.
Thank you for reading.
Marumi team
