Ken P Chin

US Patent:

6630669, Oct 7, 2003

Filed:

Mar 28, 2000

Appl. No.:

09/536856

Inventors:

Ken K. Chin - Pine Brook NJ
Haijiang Ou - Harrison NJ

Assignee:

CF Technologies, Inc. - Pine Brook NJ

International Classification:

G02F 101

US Classification:

250330, 250334, 341162

Abstract:

In the present invention of Correlated Modulation Imaging (CMI), the weak optical image signal (and therefore the signal current) is modulated, and the signal integration direction is correlated to the modulation. Therefore, the dark and/or background current, which are not modulated, are cancelled, while the signal current is integrated. As a result, the total integration time of the signal of each pixel is increased, and its signal to noise ratio and dynamic range are improved. Besides, the CMI noise spectrum peaks at the modulation frequency, and therefore, the detectors 1/f and other low frequency noises can be suppressed. In the present invention, the method and theory of CMI, as well as the means and steps for the realization of CMI, are explicitly developed. Two versions of CMOS devices (CMI unit pre-amplifier version 1 and 3), with their circuitry design and testing data are presented as the critical component for correlated modulation imaging. A prototype chip of the CMI circuitries has been fabricated by the MOSIS 0.

US Patent:

7561277, Jul 14, 2009

Filed:

May 18, 2007

Appl. No.:

11/750643

Inventors:

Ken K. Chin - Pine Brook NJ, US
Guanhua Feng - Dover NJ, US
Harry Roman - East Orange NJ, US

Assignee:

New Jersey Institute of Technology - Newark NJ

International Classification:

G01B 9/02

US Classification:

356480

Abstract:

The theory, design, fabrication, and characterization of MEMS (micro electrical mechanical system) Fabry-Perot diaphragm-fiber optic microphone are described in the present invention. By using MEMS technology in processing and packaging, a square 1. 9 mm×1. 9 mm, 2 μ thick SiOdiaphragm with a 350 μ square embossed center of silicon is mechanically clamped to the ferrule of a single mode fiber to keep its closeness (5 μ) and perpendicular orientation with respect to the diaphragm. Static measurement of optical output power versus the pressure on membrane reveals more than one period of Fabry-Perot interference, thereby generating a Fabry-Perot diaphragm-fiber interferometer device accurately reproducing audible acoustic wave.

US Patent:

7697797, Apr 13, 2010

Filed:

Sep 25, 2008

Appl. No.:

12/237744

Inventors:

Ken K Chin - Pine Brook NJ, US
Guanhua Feng - Dover NJ, US
Ivan Padron - Carteret NJ, US
Harry Roman - East Orange NJ, US

Assignee:

New Jersey Institute of Technology - Newark NJ

International Classification:

G02B 6/00
G02B 6/12
G02B 6/26
G02B 6/32
G02B 6/42
G02B 6/38
G01B 9/02

US Classification:

385 12, 385 11, 385 13, 385 14, 385 15, 385 32, 385 39, 385 73, 356477, 356478, 356480, 356519

Abstract:

The present invention is a diaphragm-fiber optic sensor (DFOS), interferometric sensor. This DFOS is based on the principles of Fabry-Perot and Michelson/Mach-Zehnder. The sensor is low cost and is designed with high efficiency, reliability, and Q-point stability, fabricated using MEMS (micro mechanic-electrical system) technology, and has demonstrated excellent performance. A DFOS according to the invention includes a cavity between two surfaces: a diaphragm made of silicon or other material with a rigid body (or boss) at the center and clamped along its edge, and the endface of a single mode optic fiber. By utilizing MEMS technology, the gap width between the diaphragm and the fiber endface is made accurately, ranging from 1 micron to 10 microns. To stabilize the Q-point of the DFOS when in use as an acoustic sensor, a system of microchannels is built in the structure of the diaphragm so that the pressure difference on two sides of the diaphragm is kept a constant, independent of the hydraulic pressure and/or low frequency noise when the device is inserted in liquid mediums.

US Patent:

20040011962, Jan 22, 2004

Filed:

Jul 18, 2002

Appl. No.:

09/973710

Inventors:

Ken Chin - Pine Brook NJ, US
Haijiang Ou - Edison NJ, US

International Classification:

H01L025/00

US Classification:

250/370080

Abstract:

The present invention comprises the principle, theory, circuit design, computer simulation, and experimental demonstration of a new type of electronic device—the multi-cycle integration focal plane array (MIFPA)—for lock-in and/or gated imaging, spectroscopy, and/or spectroscopic imaging of extremely weak signals buried in strong background. Particularly, the MIFPA can operate in three modes—the lock-in (LI), gated (G), and gated lock-in (GLI) modes. Particularly, one MIFPA circuitry was demonstrated by simulation and experiment. Particularly, the circuitry was capable to perform the LI-, G-, and GLI-modes.

US Patent:

20060118729, Jun 8, 2006

Filed:

Dec 2, 2004

Appl. No.:

11/002861

Inventors:

Ken Chin - Pine Brook NJ, US
Haijiang Ou - Endicott NY, US

International Classification:

H01L 27/14

US Classification:

250370080

Abstract:

A new electronic apparatus multicycle integration focal plane array (MIFPA) is disclosed, wherein by using correlated multicycle integrators (CMI, U.S. Pat. No. 6,630,669) extremely weak signals buried in strong background can be detected for imaging, spectroscopy, and/or spectroscopic imaging applications. The MIFPA apparatus can operate in three modes—the lock-in (LI), gated (G), and gated lock-in (GLI) modes. The methods of operating LI-MIFPA, G-MIFPA, and GLI-MIFPAP modes comprising specific steps are also disclosed.

US Patent:

20080075404, Mar 27, 2008

Filed:

May 18, 2007

Appl. No.:

11/750569

Inventors:

Ken Chin - Pine Brook NJ, US
Guanhua Feng - Dover NJ, US
Ivan Padron - Carteret NJ, US
Harry Roman - East Orange NJ, US

Assignee:

New Jersey Institute of Technology - Newark NJ

International Classification:

G02B 6/00
G01B 9/02

US Classification:

385012000, 356519000

Abstract:

The present invention is a diaphragm-fiber optic sensor (DFOS), interferometric sensor. This DFOS is based on the principles of Fabry-Perot and Michelson/Mach-Zehnder. The sensor is low cost and is designed with high efficiency, reliability, and Q-point stability, fabricated using MEMS (micro mechanic-electrical system) technology, and has demonstrated excellent performance. A DFOS according to the invention includes a cavity between two surfaces: a diaphragm made of silicon or other material with a rigid body (or boss) at the center and clamped along its edge, and the endface of a single mode optic fiber. By utilizing MEMS technology, the gap width between the diaphragm and the fiber endface is made accurately, ranging from 1 micron to 10 microns. To stabilize the Q-point of the DFOS when in use as an acoustic sensor, a system of microchannels is built in the structure of the diaphragm so that the pressure difference on two sides of the diaphragm is kept a constant, independent of the hydraulic pressure and/or low frequency noise when the device is inserted in liquid mediums.

US Patent:

20090015239, Jan 15, 2009

Filed:

Mar 3, 2008

Appl. No.:

12/041228

Inventors:

George E. Georgiou - Gillette NJ, US
Ken K. Chin - Pine Brook NJ, US
Raymond Ferraro - Howell NJ, US
Guanhua Feng - Dover NJ, US
Karen Gail Noe - Wall Township NJ, US

International Classification:

G01R 19/32

US Classification:

324105

Abstract:

A system and method in which an overhead high voltage transmission line sensor system is able to measure one or more of temperature, current, and line sag for a conductor within a high voltage transmission line system. The sensor system may be able to clamp to a transmission conductor or splice, harvest power from the transmission line, and/or transmit data corresponding to measurements of current, temperature, and line sag.

US Patent:

20120042950, Feb 23, 2012

Filed:

Jun 21, 2011

Appl. No.:

13/164836

Inventors:

Ken K. Chin - Pine Brook NJ, US

Assignee:

NEW JERSEY INSTITUTE OF TECHNOLOGY - Newark NJ

International Classification:

H01L 31/0296
H01L 31/18

US Classification:

136260, 438 95, 257E31015

Abstract:

Exemplary embodiments of the present disclosure are directed to improve p-type doping (p-doping) of cadmium telluride (CdTe) for CdTe-based solar cells, such as cadmium Sulfide (Cds)/CdTe solar cells. Embodiments can achieve improved p-doping of CdTe by creating a high density of cadmium (Cd) vacancies (V) and subsequently substituting a high density of substitutional defects and/or defect complexes for the Cd vacancies that were created. Formation of a high density of substitutional defects and defect complexes as a p-dopant can improve light-to-electricity conversion efficiency, doping levels or hole concentrations, junction band bending, and/or ohmic contact associated with p-type CdTe (p-CdTe) based solar cells.