RALPH W GERCHBERG
Optometry in Ardsley, NY
License number
Massachusetts 2552
Type
Optometrist
Address
Address
Ardsley, NY 10502
Organization information
See more information about RALPH W GERCHBERG at bizstanding.comRalph W Gerchberg
20 Kensington Rd, Ardsley, NY 10502
Industry:
Nonclassifiable Establishments
Professional information
System And Method For Recovering Phase Information Of A Wave Front
US Patent:
6545790, Apr 8, 2003
Filed:
May 16, 2001
Appl. No.:
09/858943
Inventors:
Ralph W. Gerchberg - Ardsley NY 10502
International Classification:
G02F 100
US Classification:
359237, 359279, 359299, 250550
Abstract:
A system and method for recovery of phase information from recorded intensity values is disclosed. In one aspect, a phase filter is placed in a plane, which may be the back focal plane (BFP) of a lens used for observing an object. The phase filter changes the phase of a wave front distribution in the BFP in a known manner. Amplitude stops or combinations of phase and amplitude filtering patterns can also be used to capture N different sets of intensity data in a conjugate diffraction plane. The N intensity images are used to obtain an estimate of the wave front at the first plane. This wave front estimate is then used to generate N modified estimates of the wave front at the conjugate plane, each modified estimate corresponding to one of N filtering patterns. In one implementation, the N modified IP estimates are corrected by replacing the estimated amplitudes with the actually measured ones for that image. The process is repeated iteratively until an error measure between the measured values and the synthetically generated ones falls below a known threshold.
System And Method For Recovering Phase Information Of A Wave Front
US Patent:
6369932, Apr 9, 2002
Filed:
Nov 8, 2000
Appl. No.:
09/708290
Inventors:
Ralph W. Gerchberg - Ardsley NY
Assignee:
Wavefront Analysis Inc. - New York NY
International Classification:
G02B 2600
US Classification:
359237, 359279, 359299, 250550
Abstract:
A system and method for recovery of phase information from recorded intensity values is disclosed. A phase filter, such as one or more dioptric lenses, is placed in the back focal plane (BFP) of a lens used for observing an object. The phase filter changes the phase of a wave front distribution in the BFP in a known manner. The system captures N different sets of intensity data in the image plane (IP) using N different phase filters or N phase distributions generated by an electronically variable phase filter. The N intensity images are used to obtain an estimate of the wave front at the BFP of the lens. This BFP wave front estimate is then used to generate N modified estimates of the wave front at the IP, each modified estimate corresponding to one of the N phase distributions of the BFP phase filter(s). In one implementation, the N modified IP estimates are corrected by replacing the estimated amplitudes with the actually measured ones for that image. The process is repeated iteratively until an error measure between the measured values and the synthetically generated ones falls below a known threshold.
System And Method For Recovering Phase Information Of A Wave Front
US Patent:
6906839, Jun 14, 2005
Filed:
Apr 7, 2003
Appl. No.:
10/408488
Inventors:
Ralph W. Gerchberg - Ardsley NY, US
International Classification:
G02F001/00, G02F001/01, G02F001/29, G02B027/42
US Classification:
359237, 359279, 359299, 359300, 250550
Abstract:
A system and method for recovery of phase information from recorded intensity values is disclosed. In one aspect, a phase filter is placed in a plane, which may be the back focal plane (BFP) of a lens used for observing an object. The phase filter changes the phase of a wave front distribution in the BFP in a known manner. Amplitude stops or combinations of phase and amplitude filtering patterns can also be used to capture N different sets of intensity data in a conjugate diffraction plane. The N intensity images are used to obtain an estimate of the wave front at the first plane. This wave front estimate is then used to generate N modified estimates of the wave front at the conjugate plane, each modified estimate corresponding to one of N filtering patterns. In one implementation, the N modified IP estimates are corrected by replacing the estimated amplitudes with the actually measured ones for that image. The process is repeated iteratively until an error measure between the measured values and the synthetically generated ones falls below a known threshold.
Light Microscope With Novel Digital Method To Achieve Super-Resolution
US Patent:
8040595, Oct 18, 2011
Filed:
Nov 2, 2007
Appl. No.:
12/376890
Inventors:
Ralph W. Gerchberg - Ardsley NY, US
Louise Gerchberg, legal representative - Ardsley NY, US
Louise Gerchberg, legal representative - Ardsley NY, US
Assignee:
Wavefront Analysis, Inc. - Ardsley NY
International Classification:
G02B 21/00
US Classification:
359368, 359900, 359558
Abstract:
Methods and apparatus for reconstructing a wave, including interpolation and extrapolation of the phase and amplitude distributions, with application to imaging apparatus, such as microscopes.
Light Microscope With Novel Digital Method To Achieve Super-Resolution
US Patent:
2012008, Apr 12, 2012
Filed:
Oct 14, 2011
Appl. No.:
13/273575
Inventors:
Ralph W. Gerchberg - Ardsley NY, US
Louise Gerchberg - Ardsley NY, US
Louise Gerchberg - Ardsley NY, US
International Classification:
G03H 1/08
US Classification:
359 9
Abstract:
Methods and apparatus for reconstructing a wave, including interpolation and extrapolation of the phase and amplitude distributions, with application to imaging apparatus, such as microscopes.