28.212 Retroreflector Corner Cube Prism; Anon (Strickland, Robert W); TFG Newsletter, Jan-Apr 1996 p29; L/W=1.155; H/W=0.769; Vol/W³=0.309; 96 index; 4+6 facets; Reflects rays back to their source, even when tilted
28.213 RBC-167; Conley, Richard B; Facets, Aug 2014 p10; L/W=1.099; H/W=0.686; Vol/W³=0.256; 72 index; 61+12 facets;
28.214 Shield Strobe; Arajs, Roland; Unpublished; L/W=1.155; H/W=0.798; Vol/W³=0.321; 96 index; 61+6 facets; Angles good for low RI materials
28.215 Blue Hour; Klaja, Willie; Facets Aug 2015 p15; L/W=1.155; H/W=0.679; Vol/W³=0.265; 96 index; 73+6 facets;
28.222 Hexciting Opt; Hamer, John; Personal communication 2017; L/W=1.073; H/W=0.747; Vol/W³=0.270; 96 index; 65+12 facets;
28.223 Hextraordinary BCA; Hamer, John; Personal communication 2017; L/W=1.155; H/W=0.671; Vol/W³=0.256; 96 index; 22+6 facets; BCA=Below the Critical Angle
28.224 RB Dome BCA; Hamer, John; Personal communication 2017; L/W=1.036; H/W=0.624; Vol/W³=0.213; 96 index; 49+12 facets; BCA=Below the Critical Angle
28.225 Chevron Hexagon; Wolkonsky, Alexandre and van Zanten, Piet; Personal communication 2017; L/W=1.155; H/W=0.739; Vol/W³=0.295; 96 index; 49+6 facets;
28.226 Cuboctahedron; Ninedorf, Greg; Personal communication 2017; L/W=1.155; H/W=0.944; Vol/W³=0.454; 96 index; 14+0 facets;
28.227 The Hex of Exes; Ninedorf, Greg; Personal communication 2017; L/W=1.155; H/W=0.770; Vol/W³=0.314; 96 index; 79+6 facets; For RI 1.54 or greater