Michelson interferometer for optical spectroscopy, has two optical units, one rotating about an axis parallel to a plane defined by the components of the other

摘要

Interferometer comprises a first optjcal unit (1 ), whose components define a first plane (E), and a second optical unit (2) that rotates relative to the first unit with its rotation axis (D) approximately parallel to the first plane and whose components define a point (P) that has a distance (r) greater than zero from the rotational axis. The optical path difference is a function of the distance (d) of the point (P) from the plane (E). A first measurement device is provided for measuring the rotational angle (w) of the second unit with respect to the first unit, with the optical path difference determined from an equation linking the path difference to this angle. The equation is based on a first physical and geometric model of the actual interferometer construction.