Apparent spectral emitting properties of a semi-transparent layer medium with a sine-shaped surface

The apparent spectral emission of a semi-transparent medium layer with a si ne-shaped surface was analyzed by the pseudo-source adding method. The isot ropic and isothermal medium layer was investigated by considering a specula r and semi-transparent sine-shaped surface as well as a diffuse and opaque substrate wall. The pseudosource adding method was improved. The apparent h emispherical and directional spectral emissivity results were presented and discussed by considering the influences of relevant factors. The pseudo-so urce adding method was found to be very effective for the analysis of the t hermal emission of the semi-transparent medium layer with curved surface.