Transmittance Measurements

Avian Technologies is equipped to perform measurements of regular and total transmittance at normal incidence and, in some cases, reflectance versus incidence angle for non-scattering samples.

Regular transmittance measurements are performed on a Perkin-Elmer 9/19 spectrophotometer with photomultiplier/lead sulfide detectors. Non-scattering samples up to 4″ square can be measured from 200-3000 nm. Scattering samples also require an integrating sphere for collection of the scattered radiation; depending on the size and scattering of the samples and the wavelength range needed, we employ either a 60 mm or 150 mm integrating sphere accessory.

In cases requiring non-standard geometries, we work closely with Avian Rochester, LLC. Our colleagues at Avian Rochester have access to a wide variety of flexible instrumentation to meet every customized measurement need.