公开(公告)号：CA2844789A1

公开(公告)日：2013-02-21

申请号：CA2844789

申请日：2012-08-14

Applicant: SPECTRASENSORS INC

Inventor： SCHREMPEL MATHIAS ,  FEITISCH ALFRED ,  NEUBAUER GABI

IPC: H01S5/022 ,  H01L23/485 ,  H01S5/042

Abstract: A first contact (310) surface of a semiconductor laser chip (302) is formed to a surface roughness selected to have a maximum peak to valley height that is substantially smaller than a diffusion barrier layer thickness. A diffusion barrier layer that includes a non-metallic, electrically-conducting compound and that has the barrier layer thickness is applied to the first contact surface, and the semiconductor laser chip is soldered to a carrier mounting (304) along the first contact surface using a solder composition (306) by heating the soldering composition to less than a threshold temperature at which dissolution of the barrier layer into the soldering composition occurs. Thereby the diffusion barrier remains contiguous. The non-metallic, electrically conducting compound may comprise at least one of titanium nitride, titanium oxy-nitride, tungsten nitride, cerium oxide and cerium gadolinium oxy-nitride

公开(公告)号：AU2008292847C1

公开(公告)日：2012-09-20

申请号：AU2008292847

申请日：2008-08-29

Applicant: SPECTRASENSORS INC

Inventor： FEITISCH ALFRED ,  LIU XIANG ,  MOSS JOHN ,  KWAN ALEX ,  ZHOU XIN ,  BAUM MARC M

IPC: B01D53/52 ,  B01D53/58 ,  B01D53/68 ,  G01N30/02

Abstract: Scrubber media for reactive gases, that can include but are not necessarily limited to hydrogen chloride (HCl), hydrogen sulfide (H2S), hydrogen fluoride (HF), and ammonia (NH3), can include reactive particles, potentially as small as nano-scale, that can optionally be suspended on macro-scale carrier particles. Reactive gases can be converted to non-volatile compounds by being passed through a bed of such scrubber media. Such scrubber media can be used to remove reactive gases from gas mixtures. Potential applications include differential absorption spectroscopy, air pollutant emission controls, and the like. Methods of preparing scrubber media are also described.

公开(公告)号：CA2966470A1

公开(公告)日：2012-04-26

申请号：CA2966470

申请日：2011-02-15

Applicant: SPECTRASENSORS INC

Inventor： FEITISCH ALFRED ,  KELLER LUTZ ,  LIU XIANG ,  SCHREMPEL MATHIAS ,  HELBLEY KEITH BENJAMIN

IPC: G01J3/42 ,  G01J3/02

公开(公告)号：AU2010259934A1

公开(公告)日：2012-01-19

申请号：AU2010259934

申请日：2010-06-11

Applicant: SPECTRASENSORS INC

Inventor： LIU XIANG ,  FEITISCH ALFRED ,  ZHOU XIN

IPC: G01J3/42 ,  G01N21/25

Abstract: Detector data representative of an intensity of light that impinges on a detector after being emitted from a light source and passing through a gas over a path length can be analyzed using a first analysis method to obtain a first calculation of an analyte concentration in the volume of gas and a second analysis method to obtain a second calculation of the analyte concentration. The second calculation can be promoted as the analyte concentration upon determining that the analyte concentration is out of a first target range for the first analysis method.

公开(公告)号：AU2008292847A1

公开(公告)日：2009-03-05

申请号：AU2008292847

申请日：2008-08-29

Applicant: SPECTRASENSORS INC

Inventor： BAUM MARC M ,  ZHOU XIN ,  KWAN ALEX ,  LIU XIANG ,  MOSS JOHN ,  FEITISCH ALFRED

IPC: B01D53/52 ,  B01D53/58 ,  B01D53/68 ,  G01N30/02

Abstract: A method is disclosed which comprises maintaining a scrubber medium at a temperature in a range of -20°C to 85°C, the scrubber medium comprising reactive nanoparticles having first aerodynamic diameters of less than 250 nm that are adhered to carrier particles having second aerodynamic diameters in a range of 10 to 250 microns, the carrier particles being inert relative to one or more background compounds, the reactive nanoparticles comprising a solid-phase acid, the reactive nanoparticles being adhered to the carrier particles by one or more of van der Waals and electrostatic forces. In a further step, a gas mixture is contacted with the scrubber medium while the scrubber medium is maintained at the temperature, the gas mixture comprising a reactive compound and the one or more background compounds, the reactive compound comprising a gas-phase Lewis base, the contacting causing the reactive compound to react with the reactive nanoparticles to convert the reactive compound to one or more non-volatile salts or other non-volatile chemical compounds. An apparatus, a composition and a refreshing method are also disclosed.

公开(公告)号：CA2694789A1

公开(公告)日：2009-02-05

申请号：CA2694789

申请日：2008-07-28

Applicant: SPECTRASENSORS INC

Inventor： FEITISCH ALFRED ,  LIU XIANG ,  ZHOU XIN ,  LANGHAM DALE ,  COOK CHARLES F

IPC: G01N21/75 ,  G01N21/27 ,  G01N21/31

Abstract: An energy content meter can spectroscopically quantify oxidation products after oxidation of a combustible mixture. The measured oxidation product concentrations or mole fractions can be converted to an energy content of the un-oxidized combustible mixture using a conversion factor that relates oxygen consumption during oxidation of the combustible mixture to the energy content of the combustible mixture.

公开(公告)号：CA2686715A1

公开(公告)日：2008-11-27

申请号：CA2686715

申请日：2008-05-15

Applicant: SPECTRASENSORS INC

Inventor： SANGER GREGORY M ,  SMITH CHARLES E ,  CLINE RICHARD L ,  LIU XIANG ,  ZHOU XIN

IPC: G01N21/31 ,  G01N21/35 ,  G01N21/39

Abstract: Thermodynamic properties of a natural gas stream can be determined in real time utilizing modeling algorithms in conjunction with one or more sensors for quantifying physical and chemica l properties of the natural gas. Related techniques, apparatus, systems, and articles are also described. A method and apparatus for determining the energy content of a gas stream in which spectroscopic measurements on carbon dioxide and hydrocarbons as well as a third measurement of temperature, pressure and sund velocity of the gas are input to a processor which uses an algorithm to calculate the energy contact.

公开(公告)号：AU2008242467A1

公开(公告)日：2008-10-30

申请号：AU2008242467

申请日：2008-01-24

Applicant: SPECTRASENSORS INC

Inventor： FEITISCH ALFRED ,  SANGER GREGORY M ,  LIU XIANG ,  ZHOU XIN

IPC: G01N21/31 ,  G01N21/35 ,  G01N21/39

Abstract: Concentrations of a target analyte in a gas mixture containing one or more background analytes having potentially interfering spectral absorption features can be calculated by compensating for background analyte absorption at a target wavelength used to quantify the target analyte. Absorption can be measured at a reference wavelength chosen to quantify the concentration of the background analyte. Using a background gas adjustment factor or function, the absorption measured at the reference wavelength can be used to calculate absorption due to the background analyte at the target wavelength and thereby compensate for this background absorption to more accurately calculate the target analyte concentration in real or near real time. Additional background analytes can optionally be compensated for by using one or more additional reference wavelengths.

公开(公告)号：CA2649738A1

公开(公告)日：2007-10-25

申请号：CA2649738

申请日：2007-04-19

Applicant: SPECTRASENSORS INC

Inventor： ZHOU XIN

IPC: G01N21/35 ,  G01N21/39

Abstract: Low concentrations of water vapor within a background of one or more olefin gases may be detected and quantified using a differential absorption spectrometer. A dehydrated sample of the gas is used as a background sample whose absorption spectrum allows elimination of absorption features not due to water vapor in the gas. Absorption spectra may recorded using tunable diode lasers as the light source. These lasers may have a wavelength bandwidth that is narrower than the water vapor absorption feature used for the differential absorption spectral analysis.

公开(公告)号：CA2540395A1

公开(公告)日：2005-05-26

申请号：CA2540395

申请日：2004-02-11

Applicant: SPECTRASENSORS INC

Inventor： MAY RANDY

IPC: G01N21/35 ,  G01N21/39