Optics: measuring and testing – By light interference – Having wavefront division
Reexamination Certificate
2006-08-09
2009-12-15
Connolly, Patrick J (Department: 2877)
Optics: measuring and testing
By light interference
Having wavefront division
C250S23700G
Reexamination Certificate
active
07633630
ABSTRACT:
An apparatus in one example has: first and second Fourier transform lenses, the first Fourier transform lens receiving an incident plane wavefront and focusing the plane wavefront down to a focal point in a focal plane, and the second Fourier transform lens reimaging the focused down plane wavefront to an output plane wavefront; a bead located substantially at the focal point and that is illuminated by radiation that comes in from the first lens, the bead reradiating a spherical wave, which interferes with light that passes around the bead to produce a diffraction pattern; an array of controllable light transmissive elements that support the bead in the focal plane; and a null seeking servomechanism for assigning an electrical value of phase departure of the incident plane wavefront from a reference thereof, the null seeking servomechanism controlling the light transmissive elements to produce phase shifts in light that passes around the bead to thereby remove aberrations in the incident plane wavefront.
REFERENCES:
patent: 5822066 (1998-10-01), Jeong et al.
patent: 6452146 (2002-09-01), Barchers
patent: 7283252 (2007-10-01), Kato
patent: 7336371 (2008-02-01), Haidner et al.
patent: 2003/0234970 (2003-12-01), Phillips et al.
patent: 2006/0232866 (2006-10-01), Sai et al.
patent: 2007/0176077 (2007-08-01), Barchers
patent: 2008/0037030 (2008-02-01), Livingston
Birch et al. “Real-time optical aberration correction with a ferroelectric liquid-crystal spatial light modulator” Applied Optics vol. 37, No. 11. Apr. 10, 1998. pp. 2164-2169.
Chung et al. “Adaptive-optics system with liquid-crystal phase-shift interferometer” Applied Optics. vol. 45, No. 15. May 20, 2006. pp. 3409-3414.
Bharmal el al. “Near-focus high-sensitivity wavefront sensing” Mon. Not. R. Astron. Soc. 360. 2005. 1325-1332.
Carmen Patti Law Group, LLC
Connolly Patrick J
Northrop Grumman Corporation
LandOfFree
Image amplifying, servo-loop controlled, point diffraction... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image amplifying, servo-loop controlled, point diffraction..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image amplifying, servo-loop controlled, point diffraction... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4068745