| Summary: | Comparative evaluation of thermal camera relies mainly on the measurements of standard temperature difference or thermal contrast. The tests are usually performed using expensive IR sources and standard four-bar pattern, which cannot reproduce stepped or gradient temperature distribution required across camera’s field of view [1]. The paper presents IR emitters capable of creating such temperature distribution patterns. The emitters are 3D comb-like patterns, manufactured using WEDM (wire electrical discharge machining) method. Radiative properties of such structures depend on the emissivity of base material and geometry of manufactured structure. Presented emitters require less sophisticated temperature control solutions and yet they exhibit better temperature stability. Additionally, they provide metrological features that cannot be achieved using standard test procedures [2].[b]Keywords[/b]: thermal camera, emissivity, electrical discharge machining, surface texture
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