Howard J Choi

US Patent:

20060289786, Dec 28, 2006

Filed:

May 2, 2006

Appl. No.:

11/416886

Inventors:

Roger Taylor - San Diego CA, US
Taylor Reid - Carlsbad CA, US
Howard Choi - San Diego CA, US

International Classification:

G01N 21/64
G01J 3/30

US Classification:

250458100, 356318000, 356417000

Abstract:

A system and method for a pulsed light source used in detecting fluorescence from a plurality of samples of biological material discretely, continuously or intermittently during thermal cycling of DNA to accomplish a polymerase chain reaction (PCR). An apparatus for sampling at least one sample of a biological material comprises a light source that emits a pulsed excitation light that interacts with the sample and a detector sensitive to fluorescence emitted from the sample. A method of sampling at least one sample to detect fluorescence comprises generating a pulsed excitation light with a pulsed light source; directing the pulsed excitation light into the sample; illuminating a sample with the pulsed excitation light to generate an emission light; and detecting the optical characteristics of the emission light.

US Patent:

20200312074, Oct 1, 2020

Filed:

Jun 15, 2020

Appl. No.:

16/902094

Inventors:

- Mt. Prospect IL, US
Danny D. Yang - San Diego CA, US
Frank M. Csulits - Gurnee IL, US
Howard Choi - San Diego CA, US

International Classification:

G07D 5/08
G07D 3/14
G07D 3/00
G06K 9/20
G07D 11/22

Abstract:

Currency processing systems, coin processing machines, coin imaging sensor assemblies and methods of making and methods of using the same are presented herein. A currency processing system is disclosed which includes a housing with a coin input area for receiving coins and coin receptacles for stowing processed coins. A disk-type coin processing unit, which is coupled to the coin input area and coin receptacles, includes a rotatable disk for imparting motion to coins, and a sorting head for separating and discharging coins to the coin receptacles. A sensor assembly is mounted to, adjacent or within the sorting head adjacent the rotatable disk. The sensor assembly includes a linear array of sensors, wherein the linear array of sensors is configured to sense coins processed by the coin processing unit, and to output a signal indicative of coin image information for processing the coins.