公开(公告)号：US20210231494A1

公开(公告)日：2021-07-29

申请号：US17050678

申请日：2019-04-23

Applicant: Agilent Technologies, Inc.

Inventor： David Death ,  Philip Valmont Wilson

IPC: G01J3/02 ,  G01J3/18 ,  G01J3/10 ,  G01J3/28

Abstract: A method of calibrating a spectrophotometer comprising a flash lamp. The method comprises receiving light from the flash lamp at a monochromator of the spectrometer, wherein the flash lamp is a short arc noble gas flash lamp with transverse or axially aligned electrodes; configuring the monochromator to progressively transmit the received light at each of a plurality wavelengths N of a selected range of wavelengths, wherein the range of wavelengths is associated with a wavelength feature according to a known spectral profile of the flash lamp, and wherein the wavelength feature is a self-absorption feature; and determining a spectrum of the flash lamp, wherein the spectrum comprises a corresponding power or intensity value for each of the plurality of wavelengths. The method further comprises determining a wavelength calibration error value for the wavelength feature by comparing the spectrum with a segment of a predetermined reference spectrum associated with the flash lamp, wherein the segment of the predetermined reference

公开(公告)号：US20240369475A1

公开(公告)日：2024-11-07

申请号：US18292877

申请日：2022-07-25

Applicant: Agilent Technologies, Inc.

Inventor： Hugh Charles Stevenson ,  Philip Valmont Wilson ,  Kellie Pearce

IPC: G01N21/31

Abstract: The present invention is directed to a sample holder for use in molecular absorption spectroscopy. The sample holder comprises a first surface having a first predetermined geometry. and a second surface having a second predetermined geometry. The first surface is opposite the second surface. The sample holder is configured to hold a measurement sample between the first surface and the second surface such that a distance between the first surface and the second surface defines an optical pathlength of the sample holder. The predetermined geometries of the first surface and the second surface provides a continuously variable cross-section across the sample holder so as to provide a continuous range of optical pathlengths.

公开(公告)号：US11181422B2

公开(公告)日：2021-11-23

申请号：US17050678

申请日：2019-04-23

Applicant: Agilent Technologies, Inc.

Inventor： David Death ,  Philip Valmont Wilson

IPC: G01J3/28 ,  G01J3/02 ,  G01J3/18 ,  G01J3/10 ,  H01J61/80 ,  G01J3/12 ,  H01J61/16

Abstract: A method of calibrating a spectrophotometer comprising a flash lamp. The method comprises receiving light from the flash lamp at a monochromator of the spectrometer, wherein the flash lamp is a short arc noble gas flash lamp with transverse or axially aligned electrodes; configuring the monochromator to progressively transmit the received light at each of a plurality wavelengths of a selected range of wavelengths, wherein the range of wavelengths is associated with a wavelength feature according to a known spectral profile of the flash lamp, and wherein the wavelength feature is a self-absorption feature; and determining a spectrum of the flash lamp, wherein the spectrum comprises a corresponding power or intensity value for each of the plurality of wavelengths. The method further comprises determining a wavelength calibration error value for the wavelength feature by comparing the spectrum with a segment of a predetermined reference spectrum associated with the flash lamp, wherein the segment of the predetermined reference spectrum includes one or more wavelengths associated with the self-absorption feature; and calibrating the spectrophotometer based on the wavelength calibration error value.