Richard A Driver

US Patent:

20060096860, May 11, 2006

Filed:

Nov 10, 2004

Appl. No.:

10/985315

Inventors:

Israel Stein - Chestnut Hill MA, US
Gerardus Giesen - Zutphen, NL
Jagan Rao - Moorestown NJ, US
Richard Driver - Cambridge MA, US

International Classification:

G01N 27/26

US Classification:

204409000, 204400000

Abstract:

An analyte recognition system uses an array () of ion-selective electrode (ISE) sensors, each sensitive to a different ion in a downstream flow path () therethrough to a coupling () which provides a ground or bias electrode. Another flow path () is upstream through an ISE sensor () which provides a reference electrode and the coupling. The coupling has a flow path, provided by a sidearm, to an outlet () going to a drain () for both the upstream and downstream flow paths. The upstream flow path reference electrode is a conduit for a reference fluid, and measurements from the other electrodes are made with respect to the reference electrode. Contamination and permanent poisoning of certain of the electrodes in the downstream path may occur if reversal of the flow were to take place, or if the reference fluid flowing in the upstream path were to flow into the downstream path. Reversal of flow is prevented by inclusion of a one-way valve, desirably a duckbill valve () in the coupling in the downstream path to the sidearm. Poisoning of the ISE sensors is prevented because the duckbill valve reduces the likelihood of a reversal of the normal downstream flow and reduces flow of the reference fluid in the upstream direction through the array of ion-selective electrodes.

US Patent:

56254598, Apr 29, 1997

Filed:

Mar 3, 1995

Appl. No.:

8/398595

Inventors:

Richard D. Driver - Cambridge MA

Assignee:

Galileo Electro-Optics Corporation - Sturbridge MA

International Classification:

G01N 2147
G02B 600
G02B 626

US Classification:

356446

Abstract:

A diffuse reflectance probe is disclosed which employs in an exemplary embodiment, fiberoptic light transmitting elements and a light pipe for collecting light. The fiberoptic light transmitting elements surround the light pipe and a window having a beveled surface communicates with the light transmitting fiberoptics to direct illuminating radiation in a relatively large field of view in a close working distance with the probe.

US Patent:

52127486, May 18, 1993

Filed:

Jul 11, 1990

Appl. No.:

7/551554

Inventors:

Lawrence E. Curtiss - Concord MA
Richard D. Driver - Cambridge MA

International Classification:

G02B 626
G01B 902
H01J 516

US Classification:

385 32

Abstract:

A fiber optic mixer is disclosed. A large diameter fiber has a curved radiation input end portion and a straight radiation output end portion. The length of the curved input end portion of the fiber is long enough to cause all entering radiation to hit the reflecting core boundary while the length of the straight output end portion is long enough to provide sufficient internal reflections to mix the radiation entering at the input end to produce a nearly zero correlation between an enterirg ray position and its position as an exiting ray. The fiber optic mixer can be used to efficiently couple radiation from the source or interferometer of a Fourier Transform Infrared Spectrometer (FT-IR) to a multiplicity of optical fibers so that each fiber receives substantially identical spectral, angular and intensity distributions of radiation.