Vladimir B Markov

US Patent:

6972846, Dec 6, 2005

Filed:

Mar 31, 2003

Appl. No.:

10/405045

Inventors:

Amit K. Lal - Ladera Ranch CA, US
Cecil F. Hess - Irvine CA, US
Hansheng Zhang - Aliso Viejo CA, US
L. Ernesto Hurtado - Laguna Niguel CA, US
Vladimir B. Markov - Irvine CA, US
Vyacheslav Aranchuk - Oxford MS, US

Assignee:

MetroLaser, Inc. - Irvine CA

International Classification:

G01B009/02

US Classification:

356486

Abstract:

A multi-beam laser Doppler vibrometer simultaneously measures velocity, displacement, and vibration history of multiple locations on an object. A beam of coherent light is split into an object beam and a reference beam. The object beam is divided into a plurality of object beams to simultaneously illuminate multiple locations on the object under inspection. The reference beam is frequency shifted and split into a corresponding plurality of frequency-shifted reference beams. A portion of each object beam is reflected by the object as a modulated object beam. The plurality of modulated object beams are collected and respectively mixed with the plurality of frequency-shifted reference beams to provide a plurality of beam pairs. Each beam pair may be focused onto a photodetector or an optical fiber connected to a photodetector.

US Patent:

7116426, Oct 3, 2006

Filed:

Oct 31, 2005

Appl. No.:

11/262707

Inventors:

Amit K. Lal - Ladera Ranch CA, US
Cecil F. Hess - Irvine CA, US
Hansheng Zhang - Aliso Viejo CA, US
L. Ernesto Hurtado - Laguna Niguel CA, US
Vladimir B. Markov - Irvine CA, US
Vyacheslav Aranchuk - Oxford MS, US

Assignee:

MetroLaser - Irvine CA

International Classification:

G01B 9/02

US Classification:

356486

Abstract:

A multi-beam laser Doppler vibrometer simultaneously measures velocity, displacement, and vibration history of multiple locations on an object. A beam of coherent light is split into an object beam and a reference beam. The object beam is divided into a plurality of object beams to simultaneously illuminate multiple locations on the object under inspection. The reference beam is frequency shifted and split into a corresponding plurality of frequency-shifted reference beams. A portion of each object beam is reflected by the object as a modulated object beam. The plurality of modulated object beams are collected and respectively mixed with the plurality of frequency-shifted reference beams to provide a plurality of beam pairs. Each beam pair may be focused onto a photodetector or an optical fiber connected to a photodetector.

US Patent:

7221445, May 22, 2007

Filed:

Apr 12, 2004

Appl. No.:

10/823385

Inventors:

James C. Earthman - Irvine CA, US
Vladimir B. Markov - Irvine CA, US
James D. Trolinger - Costa Mesa CA, US
Derek Dunn-Rankin - Irvine CA, US
Benjamin D. Buckner - Irvine CA, US

Assignee:

MetroLaser, Inc. - Irvine CA

International Classification:

G01N 21/88

US Classification:

3562372, 356600

Abstract:

A system for quantifying surface characteristics detects and quantifies characteristics of a surface of an object. For example, the system may quantify changes in surface roughness without contacting the specimen and without requiring precise temporal or spatial stability. The system may also quantify the evolution or progression of a particular characteristic of a surface, such as a defect, a slipband, a crack, a microcrack, a pit, a damage feature, corrosion, a contour change, an impact crater, a change in residual stress, and so on. The system may include an energy source, a detector section, and a process section. The energy source transmits a source signal to the surface of the object. The source signal is specularly reflected and/or scattered by the surface to yield one or more received signals. The detector section receives the received signal and, in turn, provides a detector signal indicative of the received signal.

US Patent:

7477398, Jan 13, 2009

Filed:

Aug 21, 2006

Appl. No.:

11/507882

Inventors:

Amit K. Lal - Ladera Ranch CA, US
Cecil F. Hess - Irvine CA, US
L. Ernesto Hurtado - Laguna Niguel CA, US
Vladimir B. Markov - Irvine CA, US
Vyacheslav Aranchuk - Oxford MS, US
Valentina V. Doushkina - Aliso Viejo CA, US

Assignee:

MetroLaser, Inc. - Irvine CA

International Classification:

G01B 9/02

US Classification:

356486

Abstract:

A multi-beam heterodyne vibrometer for analyzing vibration of an object includes an optical system and a combining element. The optical system generates a plurality of object beams and a plurality of reference beams where one of the plurality of beams has a frequency that is shifted from a frequency of the other plurality of beams. The optical system focuses each of the plurality of object beams on the object and transmits the plurality of focused object beams to the object. A portion of each of the plurality of focused object beams is reflected off of a surface of the object as a modulated object beam. The optical system collects the modulated object beams. The combining element combines each of the modulated object beams with a respective one of the reference beams into a plurality of beam pairs.

US Patent:

7961332, Jun 14, 2011

Filed:

Jun 6, 2008

Appl. No.:

12/134935

Inventors:

James Munro Kilpatrick - Irvine CA, US
Vladimir B. Markov - Irvine CA, US

Assignee:

MetroLaser, Inc. - Irvine CA

International Classification:

G01B 9/02
G01B 11/02

US Classification:

356489, 356502

Abstract:

A method and system for performing two-dimensional laser Doppler vibrometry (LDV) are disclosed. A high speed fiber optic heterodyne imaging vibrometer can be used for the imaging of high speed surface deformation and/or vibration. Images provided by the high speed fiber optic heterodyne imaging vibrometer can be representative of movement, e. g. , displacement or vibration, of the surface being imaged.

US Patent:

8462323, Jun 11, 2013

Filed:

Mar 27, 2008

Appl. No.:

12/057254

Inventors:

Vladimir B. Markov - Irvine CA, US
Anatoliy I. Khizhnyak - Irvine CA, US

Assignee:

MetroLaser, Inc. - Laguna Hills CA

International Classification:

G01N 21/00

US Classification:

356 73

Abstract:

A sensor system for remote object detection, tracking, characterization, and discrimination can have a plurality of sensors. A shared optical train that can facilitate blending of information from the sensors, so as to provide a single view for the plurality of sensors. Small and/or dim objects can be more readily detected. High-resolution 3 dimensional space object imagery and on-demand target information gathering can be provided with reduced data latency. The undesirable effects of atmospheric turbulence along the aiming direction can be mitigated even when there is a high relative velocity between the surveillance platform and remote target.

US Patent:

20100002743, Jan 7, 2010

Filed:

Jul 11, 2008

Appl. No.:

12/172032

Inventors:

Vladimir B. Markov - Irvine CA, US
Anatoliy I. Khizhnyak - Irvine CA, US

International Classification:

H01S 3/086
G02B 26/06

US Classification:

372 96, 359291

Abstract:

Methods and systems for performing target-in-the-loop, real-time laser beam phase aberration compensation through a turbulent atmosphere are disclosed. The methods and systems can distinguish between phase aberration contributions from atmospheric turbulence-induced phase aberration and target-induced phase aberration caused by target surface roughness. Selected components of incoming light can be used to define a reversed wavefront and a reverse direction of propagation such that a laser beam returned to a target tends to be concentrated upon a desired region of a target. In this manner, applications such as laser target designation, tracking, pointing, active imaging, and directed energy systems are better facilitated.

US Patent:

20160178345, Jun 23, 2016

Filed:

Feb 29, 2016

Appl. No.:

15/056925

Inventors:

- Irvine CA, US
Adela Apostol - Foothill Ranch CA, US
Vladimir Markov - Irvine CA, US

International Classification:

G01B 9/02
G01B 11/16

Abstract:

Systems and methods for conformal imaging vibrometry capable of real-time measurements of the dynamic motions of any arbitrary two-dimensional or three-dimensional structure. The systems and methods are able to fully characterize the dynamic behavior of an object of any arbitrary geometry. The test object is illuminated with multiple laser beams whose directions conform to the local normal axis of the surface. The approach enables high-speed vibration imaging of whole-body dynamics of arbitrarily shaped structures in real-time, with no multiplexed data capture or synthesized motion reconstruction, as is currently practiced. By measuring the object's vibrations simultaneously at multiple points, the disclosed systems and methods are able to reproduce the structural behavior under operational conditions, which can then be spectrally decomposed to determine the modal, complex modal and transient nature of the true structural dynamics.