Wide-Angle, Open-Faced Retroreflectors for Optical Metrology

Wide-angle, open-faced retroreflectors of a proposed type would be constructed by use of traditional corner-cube reflectors as building blocks. Wide-angle retroreflectors are needed in optical stellar interferometry, and in other branches of highly precise laser metrology; in particular, two- and three-dimensional triangulation. All of these applications involve the use of reference structures (e.g., optical trusses) and the use of retroreflectors that establish fiducial points on the structures.