Self-calibration of wavefront testing interferometers by use of diffractive elements

摘要

Self-calibration techniques in interferometry imply the absolute determination of the interferometer's systematic error without the need for a high-quality, precisely-known calibration standard. By taking separate measurements at different positions and under different orientations, the interferometer's error can be determined in an absolute manner even with non-perfect optical elements. This paper discusses the versatile possibilities of using diffractive optical elements as calibration tools in wavefront testing interferometry.