Todd F Blalock

US Patent:

7675618, Mar 9, 2010

Filed:

Apr 16, 2007

Appl. No.:

11/787258

Inventors:

Todd Blalock - Penfield NY, US
Christopher Cotton - Honeoye Falls NY, US

Assignee:

ASE Optics, Inc. - Rochester NY

International Classification:

G01J 3/28

US Classification:

356328, 385 12

Abstract:

A multiplexing spectrometer measures at least one parameter, such as temperature, pressure or stress. The system multiplexes the outputs of Bragg stack sensors deposited at the distant ends of optical fibers brought in contact or in close proximity to objects. The spectrometer detects the peaks of the optical signals returned from the Bragg stacks and converts them into corresponding values of the parameters of interest. The spectrometer includes an optical system that comprises an entrance slit, a diffraction grating as a light dispersing means. Multiplexing occurs on a two-dimensional solid state matrix photo detector detects and converts the light signals returned from the Bragg stack sensing elements into corresponding electrical signals, and a built-in look-up table to provides the values of the parameters of interest that correspond the spectral characteristics of the returned light signals.

US Patent:

7884946, Feb 8, 2011

Filed:

Apr 28, 2008

Appl. No.:

12/150486

Inventors:

Todd F. Blalock - Penfield NY, US
Filipp Ignatovich - Rochester NY, US

Assignee:

Lumetrics, Inc. - West Henrietta NY

International Classification:

G01B 11/02

US Classification:

356497

Abstract:

An apparatus for measuring the axial length of a human eye, the apparatus comprising a low coherence light source; a beam splitter; a fast displacement module for rapidly varying the path length within a reference arm of an interferometer; a laser directing a laser beam that is co-propagating with light from the low coherence light source into the displacement module.

US Patent:

8199329, Jun 12, 2012

Filed:

Dec 28, 2010

Appl. No.:

12/980110

Inventors:

Todd F. Blalock - Penfield NY, US
Filipp V. Ignatovich - Rochester NY, US

Assignee:

Lumetrics, Inc - Rochester NY

International Classification:

G01B 11/02

US Classification:

356497

Abstract:

An apparatus for measuring the axial length of a human eye, the apparatus comprising a low coherence light source; a beam splitter; a fast displacement module for rapidly varying the path length within a reference arm of an interferometer; a laser directing a laser beam that is co-propagating with light from the low coherence light source into the displacement module.

US Patent:

8279446, Oct 2, 2012

Filed:

Jul 19, 2011

Appl. No.:

13/185554

Inventors:

Filipp V Ignatovich - Rochester NY, US
Todd Blalock - Penfield NY, US

Assignee:

Lumetrics, Inc. - Rochester NY

International Classification:

G01B 9/02

US Classification:

356479, 356491

Abstract:

An apparatus for measuring a layered object comprising a low coherence light source, a coherent light source, and an interferometer including a reference arm and a measurement arm. The reference arm is comprised of a first section of polarization maintaining optical fiber engaged with a first fiber stretcher. The measurement arm is comprised of a second section of polarization maintaining optical fiber engaged with a second fiber stretcher. The first and second fiber stretchers are driven so as to alternatingly vary the lengths of the first section of polarization maintaining optical fiber and the second section of polarization maintaining optical fiber, thereby causing interference signals with the low coherence light when the length of the reference arm is equal to the length of the measurement arm including the distance from the second section of polarization maintaining optical fiber to any of the surfaces of the layers of the object.

US Patent:

20050151977, Jul 14, 2005

Filed:

Nov 4, 2004

Appl. No.:

10/981177

Inventors:

Todd Blalock - Penfield NY, US

International Classification:

G01B009/02

US Classification:

356503000

Abstract:

A system and method for measuring the thickness of materials and coatings across a moving length of material such as sheet, film, or web by the use of non-contact optical interferometry is provided. Also, a system and method for evaluating the seal integrity in flexible packaging across a moving web by the use of non-contact optical interferometry is provided. Measurement of optical density and thickness, and the combination of various measurements in the production and process of manufacturing materials such as flexible packaging items that involve moving webs of material is disclosed. The present invention concerns the system and method involved in the collection and interpretation of data for these measurements and inspections.

US Patent:

20070229846, Oct 4, 2007

Filed:

Apr 16, 2007

Appl. No.:

11/787666

Inventors:

Todd Blalock - Penfield NY, US

International Classification:

G01B 11/06

US Classification:

356503000

Abstract:

A system and method for measuring the thickness of materials and coatings across a moving length of material such as sheet, film, or web by the use of non-contact optical interferometry is provided. Also, a system and method for evaluating the seal integrity in flexible packaging across a moving web by the use of non-contact optical interferometry is provided. Measurement of optical density and thickness, and the combination of various measurements in the production and process of manufacturing materials such as flexible packaging items that involve moving webs of material is disclosed. The present invention concerns the system and method involved in the collection and interpretation of data for these measurements and inspections.

US Patent:

20120287255, Nov 15, 2012

Filed:

Dec 4, 2010

Appl. No.:

13/512336

Inventors:

Filipp V. Ignatovich - Rochester NY, US
David M. Kleinman - Rochester NY, US
Christopher T. Cotton - Honeoye Falls NY, US
Todd Blalock - Penfield NY, US

Assignee:

LUMETRICS, INC. - Rochester NY

International Classification:

H04N 7/18

US Classification:

348 78, 348E07085

Abstract:

A portable hand-held camera for imaging the fundus of an eye, the camera comprising a housing comprising an internal cavity terminating at a forward housing end, a forward lens, and a light source configured to direct light from locations distributed around the perimeter of the forward lens forwardly out of the housing end. In other embodiment, a portable hand-held camera for imaging the fundus of an eye includes optics configured to focus light reflected back from the fundus onto an image receptor, with the optics being capable of varying the field of view among differing portions of the fundus. Methods to ensure unique image identification and storage are described.