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| Integrating Sphere Diffuse Reflectance Technology for use with UV-Visible Spectrophotometry (TN51450) |
| In this technical note, we discuss the principles of diffuse reflectance and tranmittance spectrophotometry using an Integrating Sphere accessory. |
Diffuse Reflectance accessories (DRA's) are useful for measuring the UV-Vis absorption spectrum of diffusely transmitting materials and the reflectance spectrum, including quantitative color measurements, of diffusely reflecting materials. The high light loss inherent in the use of a DRA requires a spectrophotometer with an excellent light source and excellent stray light control. Integrating sphere function is optimized by a highly reflecting coating, a low port fraction and appropriate sample mounting geometry. The Thermo Scientific Diffuse Reflectance (DRA-EV-600) accessory is designed with a very low port fraction that maximizes energy throughput and gives compliance with international standards for color and Haze measurements. Its upward viewing geometry and above-the-instrument mounting make it ideal for performing reflectance measurements on large samples.
>>Complete list of UV-Vis application and technical notes.
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