Christopher J Lesiak from 853 30Th St, Lincoln, NE 68503, age 53, Phone: 402 474-6003

On-Chip Spectral Filtering Using Ccd Array For Imaging And Spectroscopy
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US Patent:

7280205, Oct 9, 2007
Filed:

Oct 30, 2006
Appl. No.:

11/554178
Inventors:

Ahmed Bouzid - Lincoln NE, US
David L. Franzen - Lincoln NE, US
Christopher Lesiak - Lincoln NE, US
Assignee:

Li-Cor, Inc. - Lincoln NE
International Classification:

G01J 3/28
US Classification:

356326
Abstract:

A spectral filtering apparatus and method is presented, which enables the functions of hyperspectral imaging to be performed with increased speed, simplicity, and performance that are required for commercial products. The apparatus includes a photosensitive array having a plurality of photosensitive elements such that different subsections of photosensitive elements of the array receive light of a different wavelength range of a characteristic spectrum of a target, and output electronics combines signals of at least two photosensitive elements in a subsection of the array and outputs the combined signal as a measure of the optical energy within a bandwidth of interest of the characteristic spectrum.

High Dynamic Range Scanning With Reduced Channel Cross-Talk
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US Patent:

8410454, Apr 2, 2013
Filed:

May 12, 2011
Appl. No.:

13/106776
Inventors:

Ahmed Bouzid - Lincoln NE, US
Christopher J. Lesiak - Lincoln NE, US
Assignee:

LI-COR, Inc. - Lincoln NE
International Classification:

G01N 21/64
US Classification:

2504581
Abstract:

A multi-channel scanning system adapted to implement a low channel cross-talk, extra-wide dynamic range scanning method by scanning the same location more than once, wherein at least one time, the power of the excitation light and detector gain are set to High for at least one of the channels and Low for at least one of the other channels and different settings are used in subsequent scans. The scans of the same channel taken with different High and Low settings are merged together to produce one wider dynamic range image.

On-Chip Spectral Filtering Using Ccd Array For Imaging And Spectroscopy
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US Patent:

20060197949, Sep 7, 2006
Filed:

Mar 2, 2005
Appl. No.:

10/906698
Inventors:

Ahmed BOUZID - Lincoln NE, US
David FRANZEN - Lincoln NE, US
Christopher LESIAK - Lincoln NE, US
Assignee:

LI-COR, INC. - Lincoln NE
International Classification:

G01J 3/28
US Classification:

356328000, 356305000
Abstract:

A spectral filtering apparatus and method is presented, which enables the functions of hyperspectral imaging to be performed with increased speed, simplicity, and performance that are required for commercial products. The apparatus includes a photosensitive array having a plurality of photosensitive elements such that different subsections of photosensitive elements of the array receive light of a different wavelength range of a characteristic spectrum of a target, and output electronics combines signals of at least two photosensitive elements in a subsection of the array and outputs the combined signal as a measure of the optical energy within a bandwidth of interest of the characteristic spectrum.

Wide Dynamic Range Imaging
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US Patent:

20110279706, Nov 17, 2011
Filed:

May 12, 2011
Appl. No.:

13/106740
Inventors:

Christopher J. Lesiak - Lincoln NE, US
Ahmed Bouzid - Lincoln NE, US
David Franzen - Lincoln NE, US
Assignee:

LI-COR, Inc. - Lincoln NE
International Classification:

H04N 5/235
US Classification:

3482291, 348E05037
Abstract:

Systems and methods for extending the dynamic range of imaging systems, and more particularly fluorescence or luminescence imaging systems, having low optical background, and a linear detector response. Images of a sample at each of a set of exposure times are acquired, a system-level dark estimate for each exposure time is subtracted from each image to form dark-corrected images, and the different exposures (dark-corrected images) are merged into a wider dynamic-range image. Typically merging is performed on a pixel-by pixel basis.

Christopher J Lesiak