This prism combines a penta-angle geometry with anti-reflection (AR) coating applied to optical surfaces to minimize Fresnel reflection losses. The prism is fabricated from optical glass such as BK7 or K9 with high angular precision. The AR coating is engineered using multilayer thin-film deposition to enhance transmission efficiency across visible wavelengths. The penta structure ensures fixed-angle beam deviation regardless of slight misalignment, while coatings improve signal throughput.