Optris Temperature Measurement Lexicon of Terms & Definitions

Absolute Zero Absolute Zero Absorption Absorption Accuracy Active Thermography Airy Disk Ambient Derating Ambient Temperature Atmospheric Windows

Background Radiation Black Body Bolometer

Calibration Calibration Body Cavity Effect CO2 filter Color Palettes Cooled Thermal Imaging Cameras Cycle Time

D:S Detector Resolution Diagonal Field of View (DFOV) Diffraction-Limited System Distance to Spot Size Ratio Dual Color Measurement Dual Wavelength Measurement

Early Fire Detection (EFD) Emissivity Emittance Exposure Time

F-number Far Field Field of View (FOV) Filter Flag Focal Length Focal Plane Array Focus Forward Looking Infrared (FLIR) Frame Rate

Grey Body

Horizontal Field of View (HFOV)

Infrared Camera Infrared Detectors Infrared Line Scanner Infrared Microscope Infrared Radiation Infrared Scanner System Infrared Sensor Infrared Thermometer Infrared Windows and Infrared Filter (IR filter) Instantaneous Field of View (IFOV) Isotherm

Kirchhoff’s Law of Thermal Radiation

Lambert’s Cosine Law Laser Thermometer Linescanner Lock-In Thermography

Measurement Field Measurement Field of View (MFOV) Microbolometer Minimum resolvable temperature difference (MRTD) Minimum Spot Size Modulation Transfer Function (MTF) Multi Color Measurement

NETD: Noise Equivalent Temperature Difference NIST Calibration Non-Contact Temperature Measurement Non-Uniformity-Correction (NUC)

Optical Filter Optical Resolution Optics

Passive Thermography Peak Hold Pixel Pitch Planck’s Law Polarization Precision PTB Calibration Pyroelectric Detectors Pyrometer

Quantum Detectors Quotient Pyrometer

Radiant Energy Radiation Thermometer Radiometric Ratio Pyrometer Reflectance Reflectivity Region of Interest (ROI) Repeatability Response Time

Sampling Time Scatter Shutter Single Color Measurement Single Wavelength Measurement Size of Source Effect Slope Spectral Filter Spectral Range Spectral Response Spot Spot Size Ratio Stefan-Boltzmann Law

Target Size Effect Temperature Temperature Coefficient Temperature Drift Temperature Measurement Range Temperature Resolution Temperature Uniformity Thermal Detector Thermal Image Thermal Image Merging Thermal Image Processing Thermal Image Subtraction Thermal Profile Thermal Radiation Thermal Sensitivity Thermal Shock Thermogram Thermography Thermopile Time Constant of Bolometers Transmissivity Transmittance Two Color Measurement Two Wavelength Measurement

Uncooled Thermal Infrared Camera

Valley Hold Vertical Field of View (VFOV)

Warm-Up Time Waveband Wedge Effect Wien’s Displacement Law

Zener Barrier