Eric Ryan Jacobsen

US Patent:

6859581, Feb 22, 2005

Filed:

Apr 2, 2003

Appl. No.:

10/405459

Inventors:

Lee M. Smith - Salt Lake City UT, US
Robert E. Benner - Salt Lake City UT, US
Aaron Carpenter - Salt Lake City UT, US
Eric Jacobsen - Salt Lake City UT, US
Curtis Johnson - West Jordan UT, US

Assignee:

Process Instruments, Inc. - Salt Lake City UT

International Classification:

G02B006/26
G02B006/28
G02B006/42
H04J014/02

US Classification:

385 26, 385 24, 385 25, 385 31, 385 16, 398 79, 398 82

Abstract:

An optical fiber multiplexer having a fixed plate and a rotating plate. A plurality of fiber-optic channels are coupled to the fixed plate in a circumferential arrangement. One fiber-optic channel is coupled to the rotating plate. Each fiber-optic channel may include one or more separate optical fibers. A servo motor rotates the rotating plate. Switching between channels occurs by rotating the rotating plate and aligning the optical fibers on the fixed plate and the rotating plate. Lens-to-lens coupling is used to transmit optical signals between the rotating and fixed plates. An adjustment device, such as a gimbal mount, may be used to adjust the horizontal and vertical axial alignment of the optical fibers coupled to the fixed plate so that optimum light signal transmission can occur. A control unit controls the operation of the servo motor.

US Patent:

7973926, Jul 5, 2011

Filed:

Jan 16, 2009

Appl. No.:

12/355040

Inventors:

Rory H. Uibel - Salt Lake City UT, US
Robert E. Benner - Salt Lake City UT, US
Eric R. Jacobsen - Salt Lake City UT, US
Lee M. Smith - Salt Lake City UT, US

Assignee:

Process Instruments, Inc. - Salt Lake City UT

International Classification:

G01J 3/44

US Classification:

356301

Abstract:

Systems and methods for determining olefin concentrations in olefin-containing fuels (e. g. , gasoline) are described. Generally, a Raman spectrum from a linear-calibration reference sample (e. g. , a pure hydrocarbon, such as toluene) and Raman spectra from multiple simulated fuel samples having known olefin concentrations are obtained. An area ratio for each simulated fuel sample is created by dividing the area in the olefin region of each fuel sample by the area in the chemical spectral region of the linear-calibration reference sample. The area ratio and the known olefin concentration for each simulated sample are used to create a linear olefin calibration. The olefin concentration of a fuel sample with an unknown olefin concentration is calculated by determining the area ratio between the olefin spectral region in the unknown sample and the chemical spectral region in a concentration-calculation reference sample (e. g. , toluene) and placing the new area ratio into the linear olefin calibration.