New, fused silicon quarts, 30° prism set for laser diode beam shaping. Anti-reflective coating optimized for 360 to 500nm.

Melles Griot sold these prisms as sets and used them in their laser diode systems. The catalog page in the pictures shows only the red and infrared coated versions as this page predated UV and blue green laser diodes, but the size and other information is still valid.