OPTICON's proprietary process for producing hollow, all-metal retroreflectors is revolutionizing the industry. Truly monolithic individual hollow cube-corner and roof prisms offer bolt-in-place mounting, real thermal stability, and extreme resistance to shock and vibration, making them ideally suited for use in field applications, motion systems, and aerospace environments. Retroreflectors can be manufactured in virtually any shape; asymmetric or large elements up to 150mm in aperture are not uncommon. Arrays of multiple hollow prisms can be assembled and mounted in protective enclosures for long range sensing applications, and accuracies of the retros can be tailored to fit the requirements of the application.