Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1985-05-08
1987-02-24
Willis, Davis L.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01B 902
Patent
active
046453466
ABSTRACT:
An optical system for analyzing and correcting distorted wavefronts comprising a deformable mirror for correcting said wavefronts; a system for analyzing and detecting phase distortions; an interferometer with lateral shearing constituting the analyzing and detecting system, for receiving the distorted wavefront for analysis, and for duplicating it and deducing from two neighboring points of the wavefront thus obtained signals for controlling deformation of said deformable mirror, wherein the interferometer with lateral shearing is formed of two 90.degree. reflecting dihedrons, the bisecting lines of which cross at the center of the interferometer, and one of the dihedrons can be moved through a predetermined distance parallel to the bisecting plane of the other, the other dihedron being vibrated cyclically parallel with its own bisecting plane.
REFERENCES:
patent: 3825348 (1974-07-01), Nomarski et al.
Marty et al., "Radial Shearing Interferometers Using a Laser Source", Applied Optics, vol. 12, No. 11, pp. 2765-2767, 11/73.
Roddier et al., "A Rotation Shearing Interferometer with Phase-Compensated Roof-Prisms, J. Optics, vol. 9, No. 3, pp. 145-149 6/78.
Koren Matthew W.
Office National d'Etudes et de Recherche Aerospatiale
Willis Davis L.
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