| 摘要 |
A polarization interferometer comprises a light source (1), a collimator (2), a first polarization element (3), a system of double-refracting elements (4, 5, 6) and a second polarizing element (7) which polarizes the light emerging from the double-refracting element (4, 5, 6) and directs it to a photon detector (8). The double-refractive element (4, 5, 6) consists of two optical wedges (5, 6) which together constitute a right parallepiped and which are arranged so as to slide relative to each other along opposed side surfaces, and a double-refracting plate (4) with parallel faces which acts as a compensator. The optical axis of the compensator (4) makes a finite angle with those of the two wedges (5, 6) in the plane perpendicular to the light beam, the optical axes of both wedges (5, 6) being coincident. The optical axes of the two polarizers (3, 7) are mutually perpendicular or parallel and are not aligned parallel to the axes of the two wedges (5, 6) of the double-refractive element (4, 5, 6). |
