Analysis and interpretation for the infrared and photoelectric imaging test & calibration sector — more than just news, we provide professional insights. Covers key parameter guides, metrology standards and procedures, Chinese supply chain developments, and downstream application developments.
NETD represents the smallest temperature difference a thermal imager can resolve; a lower value indicates higher sensitivity. We explain the definition, mK units, the SNR=1 test method, and why measuring NETD requires a standard blackbody.
Evaluating a thermal imager's "clarity" involves MRTD, MDTD, and MTF. We explain the 4-bar target 7:1 ratio, the knife-edge MTF test principle, and how they complement NETD measurements.
For credible IR temperature measurement, values must be traceable to national standards. We review the three key specifications—JJF 1552, JJF 1187, and JJG 856—explaining calibration intervals, emissivity handling, and traceability chains.
Industrial thermal imager acceptance follows GB/T 19870, FPA parameters follow GB/T 17444, and body temperature screening follows GB/T 19146. We outline the applicable scopes and how to measure dead-pixel rate and non-uniformity.
Chinese infrared detector shipments have reached high volumes globally. The ramp-up in mass production brings pressure on factory testing and consistency—"manufacturable" must be complemented by "measurable."
The low-altitude economy is now part of government work reports; automotive IR is being deployed intensively. As applications expand, NETD/MRTD and temperature calibration become critical compliance and quality lines.