LPIR FT, Laboratory Portable FTIR Spectroreflectometer

The Laboratory Portable FTIR Spectroreflectometer (LPIR FT) is a unique instrument for easily and quickly measuring total hemispherical spectral reflectance of almost any surface regardless of size. This spectral reflectometer makes measurements over the infrared region of the spectrum from 2.5um to 25um. The LPIR FT incorporates unique optical, mechanical, and electronic designs to provide state-of-the-art performance in a compact instrument. The LPIR FT is also available in a vacuum chamber compatible version; LPIR FT V.

The LPIR FT user interface provides a one button operation for an automatic measurement scan. For additional flexibility, selectable options for specific measurements are provided, including multiple scan averaging. The menu-driven display leads the user through the setup and operation of the LPIR FT, including the display of the measurement data. Automatic integration of the spectral reflectance data is performed to calculate and display total normal emittance. An internal hard disk allows storage of thousands of measurements.

Along with its powerful and user friendly PC/Power Box, the LPIR FT combines AZ Technology’s patented optical design with an interferometer and control electronics. An AZ Technology application software is provided for retrieving, archiving, and displaying LPIR FT data. The software provides all the tools necessary, from data analysis to publication quality graphics. (SOC 400T)

The table below lists specifications for the LPIR FT, FTIR spectral reflectometer.

Wavelength 2.5um to 25um
Reflectance repeatability – 2.5 to 20 um – ± 1%
– 20 to 25 um – ± 3%
Wavelength repeatability ± 0.5%
Sample size ≥ 0.5 inches in diameter
Full scan measurement time 3.5 minutes (Nominal)
Spectral resolution

Selectable from 32/cm to 0.5/cm

Measurement type Total Hemispherical Spectral Reflectance


Measurement Head: 10.78 x 16.41 x 8.25 inches

Weight Measurement Head: 21 pounds
Power required 115 VAC/60Hz
Warranty 1 year parts and labor


*Note: terms reflectance, emittance and absorptance and terms reflectivity, emissivity and absorptivity are often used interchangeably. Spectroreflectometer, spectro-reflectometer and spectral reflectometer are also used interchangeably.