Patents Assigned to Wavefront Analysis
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Publication number: 20190310374Abstract: An optical system for automated vision and detection. The system includes a light source configured to emit a beam into an environment and a first diffractive optical element. The beam passes through the first diffractive optical element, resulting in a plurality of beams. One or more of the plurality of beams are reflected by the environment, resulting in reflected beams. A second diffractive optical element of the optical system is configured to receive the reflected beams. A detector in alignment with the second diffractive optical element receives the reflected beams. The detector is configured to determine wave data from the reflected beams and generate a plurality of phasorgrams in a single image representing the wave data. The optical system also includes a processor configured to receive the single image and generate a representation of the environment. A control computer is configured to receive the representation of the environment from the processor.Type: ApplicationFiled: April 5, 2019Publication date: October 10, 2019Applicant: Wavefront Analysis, Inc.Inventors: Rolf Jon Gerchberg, Thomas Dean Milster
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Patent number: 8941914Abstract: 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.Type: GrantFiled: October 14, 2011Date of Patent: January 27, 2015Assignee: Wavefront Analysis, Inc.Inventor: Louise Gerchberg
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Patent number: 8040595Abstract: 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.Type: GrantFiled: November 2, 2007Date of Patent: October 18, 2011Assignee: Wavefront Analysis, Inc.Inventors: Ralph W. Gerchberg, Louise Gerchberg, legal representative
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Patent number: 7470903Abstract: A coherent radiation imaging system that produces digital images with a reduced amount of speckle. Radiation from a long coherence length source is used to form an image of a sample. The output coherent wave is temporally divided into a plurality of wavelets. The spatial phase of each wavelet is then modulated a known and different amount. Each phase modulated wavelet illuminates the sample and is perturbed by its interaction with the sample. A spatial phase map of each perturbed wavelet is then created and converted to a sample image with an image reconstruction program. The plurality of sample images thus formed is statistically averaged to form a final averaged image. The high frequency speckle that is not optically resolvable tends to average to zero with continual statistical averaging, leaving only the optically resolvable lower frequency phase information.Type: GrantFiled: November 16, 2007Date of Patent: December 30, 2008Assignees: Technology Innovations, LLC, Wavefront AnalysisInventors: David F. Prelewitz, Robert W. Gray, Rolf Gerchberg, Michael L. Weiner
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Publication number: 20080179521Abstract: A coherent radiation imaging system that produces digital images with a reduced amount of speckle. Radiation from a long coherence length source is used to form an image of a sample. The output coherent wave is temporally divided into a plurality of wavelets. The spatial phase of each wavelet is then modulated a known and different amount. Each phase modulated wavelet illuminates the sample and is perturbed by its interaction with the sample. A spatial phase map of each perturbed wavelet is then created and converted to a sample image with an image reconstruction program. The plurality of sample images thus formed is statistically averaged to form a final averaged image. The high frequency speckle that is not optically resolvable tends to average to zero with continual statistical averaging, leaving only the optically resolvable lower frequency phase information.Type: ApplicationFiled: November 16, 2007Publication date: July 31, 2008Applicants: Technology Innovations, LLC, Wavefront Analysis, Inc.Inventors: David F. Prelewitz, Robert W. Gray, Rolf Gerchberg, Michael L. Weiner
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Patent number: 7282716Abstract: A coherent radiation imaging system that produces digital images with a reduced amount of speckle. Radiation from a long coherence length source is used to form an image of a sample. The output coherent wave is temporally divided into a plurality of wavelets. The spatial phase of each wavelet is then modulated a known and different amount. Each phase modulated wavelet illuminates the sample and is perturbed by its interaction with the sample. A spatial phase map of each perturbed wavelet is then created and converted to a sample image with an image reconstruction program. The plurality of sample images thus formed is statistically averaged to form a final averaged image. The high frequency speckle that is not optically resolvable tends to average to zero with continual statistical averaging, leaving only the optically resolvable lower frequency phase information.Type: GrantFiled: November 5, 2004Date of Patent: October 16, 2007Assignees: Technology Innovations, LLC, Wavefront Analysis, Inc.Inventors: David Prelewitz, Robert Gray, Rolf Gerchberg, Michael Weiner
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Publication number: 20030202634Abstract: 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.Type: ApplicationFiled: April 7, 2003Publication date: October 30, 2003Applicant: Wavefront Analysis, Inc.Inventor: Ralph W. Gerchberg
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Patent number: 6369932Abstract: 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.Type: GrantFiled: November 8, 2000Date of Patent: April 9, 2002Assignee: Wavefront Analysis Inc.Inventor: Ralph W. Gerchberg