Two-beam interferometer for measuring aberrations of optical components with axial symmetry
Anno: 2001
Autori: De Nicola S., Ferraro P., Finizio A., Pierattini G.
Affiliazione autori: Istituto di Cibernetica del CNR, Via CToiano 6, 80072 Arco Felice (NA), Italy;
Istituto Nazionale di Ottica Applicata, Sez. di Napoli, Via CToiano 6, 80072 Arco Felice (NA), Italy
Abstract: We present a concept of interferometric testing, believed to be novel, that can be applied to measuring aberrations of optical components that have rotational symmetry. The optical configuration uses two coherent, collimated wave fronts that are tilted to impinge upon the optical component being tested such that one beam is on axis and the other is off axis. For small tilt angles the two aberrated wave fronts can be considered to be carrying the same aberrations. Furthermore, the off-axis beam is displaced along a direction orthogonal to the optical axis of the component. Interference between the two aberrated wave fronts produces a fringe pattern that is similar to a lateral shear interference pattern. Moire fringes are obtained by spatial beating of the interference pattern with a CCD TV camera array. Under such conditions it is possible to subtract most of the linear carrier that is intrinsically present in the resultant fringe pattern owing to the large defocus aberration and tilt. (C) 2001 Optical Society of America.
Giornale/Rivista: APPLIED OPTICS
Volume: 40 (10) Da Pagina: 1631 A: 1636
Parole chiavi: lateral shearing interferometerDOI: 10.1364/AO.40.001631Citazioni: 6dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-12Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui