Figure 10. (a) Illustration of the quadrangular prism of self-invisibility (1) and (2) are two identical triangular prisms; (3) and (4) are also identical triangular prisms. (5) and (6) are identical transparent rectangular prisms, (b) The light path by relevant mirrors of lateral faces of all triangular prisms

From

Research on the Possibility of Camouflaged A-pillars by Using the Quadrangular Prism of Self Invisibility

Yizong He

American Journal of Vehicle Design. 2018, 4(1), 1-10