Optical Standards

MRC-1920x NIR Diffuse Reflectance Standards

Near-infrared diffuse reflectance standards are used to validate the wavelength scale of near-infrared instruments. The standards are made with four components – three rare earth oxides and talc – to cover the whole region from 1000 nm to 2500 nm. The standards are sealed and traceable to NIST SRM 1920a standards. Different sizes allow use with numerous spectroscopic instruments. Click on the link below for product details.

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Near-infrared and UV-visible Diffuse References

In order to measure reflectance with a UV-Visible or a Near-Infrared instrument, or hyperspectral camera, the instruments need to be tested with materials that have the highest possible reflectance. Diffuse gold in 1 inch and 1.75 inch diameters could be used in conjunction with the same size Middleton Research wavelength standards.

High reflectivity PTFE is an industry standard. Middleton Research produces PTFE reflective materials that are fully comparable with the best available reflectance standards in both the near-infrared and ultraviolet-visible regions, and they can be manufactured in different shapes and sizes.

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Absolute Specular Reflectance Standards

Infrared specular reflectance measurements are related to highly reflective reference materials, such as evaporated gold. Thin gold coatings, however, may change with use over time, and furthermore, the reflectance cannot be assumed to be close to the ideal 100 percent, even when the gold surface is freshly created. The Middleton Research Specular Reflectance Standard has known and tabulated reflectance values, and thus can be used to normalize the reflectance measurements of unknown surfaces. The Infrared Specular Reflectance Standard is stable over time, thus it can assure the long-term stability and comparability of such measurements.

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ATR Validation Standards

For measurements in regulated industries, ATR accessories need to be validated periodically. The Middleton Research ATR Validation Standards serve to test the functioning and reproducibility of ATR accessories and systems, without contaminating the ATR crystal surface.

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Recertification of Standards

Many standards must be re-certified periodically to comply with regulatory requirements. Recertification is a cost-effective way of extending the life of a standard. Middleton Research performs this service expeditiously to minimize your down time. Should you already have a standard from Middleton Research or its predecessor company, Kemeny Associates, please contact us for recertification.