PTFE White Reflectance Standard
The Thunder Optics White Reference is a high-quality diffuse reflectance standard made from solid sintered PTFE. Designed for laboratory and industrial spectroscopy applications, it provides stable and reproducible reflectance measurements across a wide spectral range.
Why PTFE?
PTFE is widely used in spectroscopy due to its:
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High diffuse reflectance
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Near-Lambertian behavior
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Chemical stability
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Hydrophobic surface
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Long-term durability
It offers an excellent balance between performance and cost compared to certified Spectralon standards.
PTFE is widely used in spectroscopy due to its high diffuse reflectance properties (see material properties overview).
https://en.wikipedia.org/wiki/Polytetrafluoroethylene
Applications
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Reflectance spectroscopy
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Colorimetric measurements
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Integrating sphere calibration
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Optical system testing
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Educational laboratory use
Mechanical Design
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Precision-machined aluminum housing
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Black anodized finish
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Removable lid for surface protection
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Compact and robust design
Designed to integrate with our fiber reflectance probes and UV-Vis spectrometers.
Maintenance
The PTFE surface can be cleaned gently if contaminated:
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Blow with clean compressed air
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Use lint-free cloth if necessary
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Avoid scratching the surface
Spectral Performance
The PTFE diffuser provides stable and reproducible diffuse reflectance across the UV–Vis–NIR spectral range. Due to its near-Lambertian behavior, it ensures uniform angular scattering and reliable calibration in reflectance measurements.
Typical usable range: 250–2500 nm
(Actual performance depends on measurement geometry and setup.)
Comparison with Certified Standards
While certified reflectance standards (e.g., Spectralon®) offer traceable calibration data, PTFE provides an excellent cost-performance alternative for:
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Relative reflectance measurements
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Educational use
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Industrial process monitoring
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System validation
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