Peililämpöerotus

Peililämpöerotus refers to a method used in thermal imaging and infrared thermography. It is a calibration technique that corrects for the heat emitted by the imaging system's own components, such as lenses and detectors. This emitted heat can be detected by the infrared sensor and appear as a spurious temperature reading, leading to inaccurate measurements of the target object.

The principle behind peililämpöerotus is to establish a baseline of the system's internal thermal emission. This is typically achieved by measuring the sensor's output when the field of view is completely obstructed by a uniform, known temperature source, often referred to as a "blackbody" target or a uniform temperature reference. By capturing this internal emission signature, it can be subtracted from subsequent measurements of actual objects.

This correction is crucial for achieving accurate and reliable temperature measurements in thermographic applications. Without peililämpöerotus, the apparent temperature of a scanned object would be a combination of its true temperature and the system's own thermal noise. This can lead to significant errors, especially when measuring low-temperature objects or when precise temperature quantification is required for diagnostics, quality control, or scientific research. The effectiveness of the peililämpöerotus depends on the stability of the imaging system's temperature during the measurement process.