Daniel L Feldkhun from 71 Benthaven Pl, Boulder, CO 80305, age 49, Phone: 3037176598

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Fourier Domain Sensing
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US Patent:

8184279, May 22, 2012
Filed:

Jun 16, 2009
Appl. No.:

12/485858
Inventors:

Daniel Feldkhun - Boulder CO, US
Assignee:

The Regents of the University of Colorado, a Body Corporate - Denver CO
International Classification:

G01J 1/36
US Classification:

356217, 250351
Abstract:

Methods, systems, and apparatuses are provided for measuring one or more sinusoidal Fourier components of an object. A structured second radiation is generated by spatially modulating a first radiation. The structured second radiation illuminates the object, The structured second radiation is scaled and oriented relative to the object. The object produces a third radiation in response to the illuminating. A single-element detector detects a portion of the third radiation from multiple locations on the object substantially simultaneously for each spatial modulation of the first radiation and for each orientation of the second radiation. A time-varying signal is produced based on said detected portion of the third radiations. One or more characteristics of the one or more sinusoidal Fourier components of the object are estimated based on the time-varying signal.

Multiple Channel Locating
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US Patent:

8531650, Sep 10, 2013
Filed:

Jul 8, 2009
Appl. No.:

12/499758
Inventors:

Daniel Feldkhun - Boulder CO, US
Benjamin Braker - Boulder CO, US
Eric Daniel Moore - Boulder CO, US
Assignee:

Chiaro Technologies LLC - Boulder CO
International Classification:

G01C 3/08
US Classification:

356 401, 356 301, 356 41, 356 501
Abstract:

Methods, systems, and apparatuses are provided for estimating a location on an object in a three-dimensional scene. Multiple radiation patterns are produced by spatially modulating each of multiple first radiations with a distinct combination of one or more modulating structures, each first radiation having at least one of a distinct radiation path, a distinct source, a distinct source spectrum, or a distinct source polarization with respect to the other first radiations. The location on the object is illuminated with a portion of each of two or more of the radiation patterns, the location producing multiple object radiations, each object radiation produced in response to one of the multiple radiation patterns. Multiple measured values are produced by detecting the object radiations from the location on the object due to each pattern separately using one or more detector elements. The location on the object is estimated based on the multiple measured values.

Fourier Domain Sensing
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US Patent:

8558998, Oct 15, 2013
Filed:

Sep 28, 2011
Appl. No.:

13/247610
Inventors:

Daniel Feldkhun - Boulder CO, US
Kelvin H. Wagner - Boulder CO, US
Assignee:

The Regents of the University of Colorado, a Body Corporate - Denver CO
International Classification:

G01J 1/36
US Classification:

356217, 356432, 356300, 250351, 382206, 382232, 382254
Abstract:

Methods and systems are disclosed of sensing an object. A first radiation is spatially modulated to generate a structured second radiation. The object is illuminated with the structured second radiation such that the object produces a third radiation in response. Apart from any spatially dependent delay, a time variation of the third radiation is spatially independent. With a single-element detector, a portion of the third radiation is detected from locations on the object simultaneously. At least one characteristic of a sinusoidal spatial Fourier-transform component of the object is estimated from a time-varying signal from the detected portion of the third radiation.

Spatial Light Modulation
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US Patent:

20020141039, Oct 3, 2002
Filed:

Apr 2, 2001
Appl. No.:

09/825452
Inventors:

Michael Mermelstein - Cambridge MA, US
Abraham McAllister - Cambridge MA, US
Cameron Abnet - Waltham MA, US
Daniel Feldkhun - Brighton MA, US
International Classification:

G02F001/33
G02F001/29
G02B026/08
US Classification:

359/305000, 359/298000
Abstract:

A method for spatially modulating radiation includes directing at least one radiation beam upon at least one surface acoustic wave diffractive element, and driving at least one of the surface acoustic diffractive elements with a plurality of modulating signals to generate a plurality of modulated output radiation beams having parameters.

Microscopic Motion Measuring
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US Patent:

20030218673, Nov 27, 2003
Filed:

Dec 28, 2000
Appl. No.:

09/750886
Inventors:

Cameron Abnet - Waltham MA, US
Daniel Feldkhun - Brighton MA, US
Abraham McAllister - Cambridge MA, US
Michael Mermelstein - Cambridge MA, US
International Classification:

H04N007/18
US Classification:

348/079000
Abstract:

Microscopic motions of a target are measured by illuminating the target, receiving the image of the illuminated target, and controlling illumination with a computer. The real-time image of the illuminated target may be displayed.

Optically Enhanced Digital Imaging System
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US Patent:

20060092505, May 4, 2006
Filed:

Oct 31, 2005
Appl. No.:

11/263592
Inventors:

Charles Abnet - Waltham MA, US
Daniel Feldkhun - Boulder CO, US
Michael Mermelstein - Cambridge MA, US
Assignee:

Umech Technologies, Co. - Watertown MA
International Classification:

G02B 21/00
US Classification:

359380000, 359368000
Abstract:

Improved methods and systems for imaging are provided. Specifically, systems and methods for extending the range of a digital zoom are provided in which an imaging system provides continuous magnification over a plurality of interleaved optical pathways and digital zooming imagers. Systems and methods of centering an image as the field of view changes, and for masking out undesirable obstacles from a magnified image are also provided.

Optically Enhanced Digital Imaging System
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US Patent:

20130044203, Feb 21, 2013
Filed:

Aug 22, 2012
Appl. No.:

13/592220
Inventors:

Charles Cameron Abnet - Waltham MA, US
Daniel Leibovich Feldkhun - Boulder CO, US
Michael Stephen Mermelstein - Cambridge MA, US
Assignee:

Cascade Microtech, Inc. - Beaverton OR
International Classification:

H04N 7/18
US Classification:

348 80, 348E07085
Abstract:

Improved methods and systems for imaging are provided. Specifically, systems and methods for extending the range of a digital zoom are provided in which an imaging system provides continuous magnification over a plurality of interleaved optical pathways and digital zooming imagers. Systems and methods of centering an image as the field of view changes, and for masking out undesirable obstacles from a magnified image are also provided.

Systems And Methods For Suppressing Coherent Structured Illumination Artifacts
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US Patent:

20130088723, Apr 11, 2013
Filed:

Oct 5, 2012
Appl. No.:

13/645532
Inventors:

Daniel Feldkhun - Boulder CO, US
International Classification:

G01B 9/02
US Classification:

356498, 356450
Abstract:

Methods and systems are provided for suppressing speckle and/or diffraction artifacts in coherent structured illumination sensing systems. A coherent radiation pattern forms an interference pattern at an illumination image plane and illuminates an object. Radiation scattered or otherwise emitted by the object is detected to produce a signal, which is integrated in time. Coherent artifact suppression is attained by using a spatial modulator, such as an acousto-optic device, to vary a phase gradient at the illumination image plane during the signal integration time. Various embodiments are provided for purposes including without limitation: preserving the depth of field of the coherent illumination; using the same acousto-optic device for pattern generation and coherent artifact suppression; electronically controlling the effective spatial coherence of the illumination system; and reducing errors due to coherent artifacts in a laser-based three dimensional imaging system.