Null cartan geodesic isophote curves in Minkowski 3-space

In this paper, we investigate null Cartan geodesic isophote curves in the Minkowski 3-space, and give examples where such curves actually exist. By categorizing the types of light vectors, we characterize different types of null Cartan geodesic isophote curves. Moreover, we present the relationship between null Cartan geodesic isophote curves and other special curves.