Method and apparatus for processing spectrum in spectral measurement

• US 6,201,606 B1
• Filed: 07/07/1998
• Issued: 03/13/2001
• Est. Priority Date: 11/08/1995
• Status: Expired due to Fees

• Current Assignee: Kyoto Daiichi Kagaku Company Limited
• Original Assignee: Kyoto Daiichi Kagaku Company Limited
• Inventors: Ashibe, Emi
• Primary Examiner(s): Pham, Hoa Q.
• Application Number:
  US09/068,036
• Time in Patent Office: 980 Days
• Field of Search: 356/39-41, 356/300, 356/320, 356/436-437, 356/432, 356/326, 356/328, 356/330-334, 356/319, 128/633, 250/339.04, 250/339.07
• US Class Current: 356/432
• CPC Class Codes: G01J 3/28 Investigating the spectrum using colour filters G01J3/51
• CPC Class Codes: G01J 3/42 Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry beam switching arrangements G01J3/08

Abstract

The apparatus for processing a spectrum in spectral measurement includes: a measurement section 10 for measuring an energy spectrum of light for measurement from an object to be measured; an addition section 11 for adding a predetermined value to the energy spectrum of the light for measurement; and a conversion section 12 for obtaining an absorbance spectrum with reduced noise by effecting absorbance conversion of the energy spectrum of the light for measurement with the addition of the predetermined value.

Claims

1. A method for processing a spectrum in spectral measurement, comprising the steps of:

measuring an energy spectrum of light for measurement from an object to be measured;

adding a predetermined value to the energy spectrum of the light for measurement; and

obtaining an absorbance spectrum with reduced noise by effecting absorbance conversion of the energy spectrum of the light for measurement with the addition of the predetermined value,

wherein the predetermined value is variable for a wavelength range of the energy spectrum of the light for measurement.

2. A method according to claim 1, further comprising the step of:

conducting quantitative analysis of a component contained in the object to be measured based on the absorbance spectrum with reduced noise.

3. A method according to claim 2, wherein the quantitative analysis is conducted based on a multivariate analysis method.

4. An apparatus for processing a spectrum in spectral measurement, comprising:

a measurement section for measuring an energy spectrum of light for measurement from an object to be measured;

an addition section for adding a predetermined value to the energy spectrum of the light for measurement; and

a conversion section for obtaining an absorbance spectrum with reduced noise by effecting absorbance conversion of the energy spectrum of the light for measurement with the addition of the predetermined value,

wherein the predetermined value is variable for a wavelength range of the energy spectrum of the light for measurement.

5. An apparatus according to claim 4, further comprising:

a quantitative analysis section for conducting quantitative analysis of a component contained in the object to be measured based on the absorbance spectrum with reduced noise.

6. An apparatus according to claim 5, wherein the quantitative analysis is conducted based on a multivariate analysis method.