Coating Reflectivity Data

Measured reflectivity for the coatings we run, published three ways: as curves, as averages, and as the complete raw spectral file. To our knowledge no other coating service publishes its actual measured data.

Raw spectral data (PDF, 250 KB) Original chart (JPG)

Reflectivity curves from 400 to 750 nanometres for three Optic Wave Laboratories coatings. Protected silver rises from 77 percent at 400nm to a 97.05 percent peak and holds it across the visual band. Semi-enhanced aluminum peaks at 92.53 percent near 500nm then falls to 82 percent at 750nm. Standard aluminum stays near 90 percent, peaking at 90.56 percent. — Measured reflectivity, 400–750 nm. Vertical axis is scaled 75–100% so the curves can be read; the raw data is linked above.

Averages

Coating Type	Average Reflectivity (400 nm – 750 nm)	Human visual average (420 nm – 650 nm)	Peak Reflectivity
Standard Aluminum	89.91%	90.22%	90.56%
Semi-Enhanced Aluminum	90.14%	91.45%	92.53%
Protected Silver	93.15%	93.47%	97.05%

Reflectivity by wavelength

The same measured spectra, sampled every 25 nm. The complete file at roughly 1 nm resolution is linked at the top of this page.

Wavelength	Standard Aluminum	Semi-Enhanced Aluminum	Protected Silver
400 nm	89.67%	90.25%	76.99%
425 nm	89.84%	91.37%	83.25%
450 nm	90.06%	92.05%	88.59%
475 nm	90.31%	92.40%	92.14%
500 nm	90.56%	92.53%	94.28%
525 nm	90.41%	92.15%	95.35%
550 nm	90.34%	91.72%	96.04%
575 nm	90.32%	91.19%	96.54%
600 nm	90.35%	90.62%	96.90%
625 nm	90.01%	89.60%	96.99%
650 nm	89.75%	88.53%	97.04%
675 nm	89.56%	87.48%	97.05%
700 nm	89.43%	86.48%	97.04%
725 nm	88.44%	84.34%	96.99%
750 nm	87.47%	82.07%	96.92%

Every figure above is taken from the same measured spectra plotted in the chart. See our coating services and pricing.