Spectrophotometer with a system for calibrating a monochromator
US5557404A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1995 |
| Grant date | Sep 17, 1996 |
| Priority date | — |
| Expiry date | Mar 17, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/2866
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Irregular mechanical imperfections caused by constituent parts of a monochromator in connection with wavelength setting are compensated by calibrating the monochromator according to the present invention. A whole measurable spectral range in the monochromator is divided into a plurality of spectral regions by a plurality of calibration wavelengths. Errors between apparent wavelengths set theoretically and their true wavelengths are obtained with respect to the respective calibration wavelengths. Error functions in connection with the respective spectral regions are calculated on the basis of the array of the obtained errors. An element to be detected in a sample is measured under a wavelength the error of which has been compensated for by use of an error function in a spectral region associated with a wavelength to be detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.