Spectrometer system and method for testing of same
A spectrometer and spectrum technology, applied in the field of spectrometer systems, can solve problems such as changes in measurement performance and increased costs, and achieve the effect of less cost and faster cost
Pending Publication Date: 2021-09-07
CARL ZEISS MICROSCOPY GMBH
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AI Technical Summary
Problems solved by technology
Measuring windows when used in agricultural implements can also be affected by material flow and have to be replaced
This leads to changes in the measurement performance, requiring periodic recalibration with external references, and thus increased costs
Method used
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Experimental program
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Embodiment Construction
[0023] In a preferred embodiment of the invention, the filling gas contains free water in the form of water vapour, so that the water forms the air humidity. In practice, this prerequisite is satisfied in almost all applications. The air humidity has a saturation of preferably at least 10% in the range from 0° C. to 70° C., which is a small value but sufficient to detect absorption bands. Accordingly, unique absorption bands of water vapor are identified in the reference and test spectra. Preferably, at least one unique absorption band of water vapor in the wavelength range between 1300 nm and 2050 nm is identified in the reference spectrum and the test spectrum. Preferably, a plurality of unique absorption bands of water vapor in the wavelength range between 1300 nm and 2050 nm are identified in the reference spectrum and the test spectrum. However, the filling gas can also be another gas or a protective gas, or individual absorption bands can result from different componen...
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The present invention relates to a spectrometer system and a method for testing of same. The spectrometer system comprises a housing provided with a window, an illumination source, a spectrometer and a standard for internal recalibration being disposed in said housing. Specific absorption bands of a filling gas present in the housing are identified in a reference spectrum, which was recorded using the standard, wherein a wavelength characterizing the relevant identified specific absorption band is measured in each case such that measured values are obtained for the wavelengths of the absorption bands. A test spectrum is recorded by the spectrometer using the standard. The specific absorption bands of the filling gas are identified in the test spectrum, wherein a wavelength characterizing the relevant identified specific absorption band is measured in each case such that measured values are obtained for the wavelengths of the specific absorption bands. According to the invention, a test is carried out to establish whether the measured values of the wavelengths of the absorption bands identified in the test spectrum deviate by no more than a predetermined measure from the measured values of the wavelengths of the absorption bands identified in the reference spectrum.
Description
technical field [0001] The invention relates to a method for testing a spectrometer system, which is designed, for example, as a composition analysis system for agricultural products or food. Furthermore, the method can also be configured for recalibration of spectrometer systems. Furthermore, the invention also relates to a spectrometer system. Background technique [0002] DE 10 2007 029 405 A1 teaches a wavelength and intensity standard for a spectrometer, which is provided in particular as a measuring head for calibrating and testing a spectrometer. The standard part consists of a carrier and a plate arranged in the carrier made of transparent plastic which has high strength and shape stability over a wide temperature range. Plastics have distinct absorption bands in the entire NIR range and that chemical structure and composition should reliably and time-stable ensure a high moisture barrier against the absorption and output of water. The plate body advantageously co...
Claims
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IPC IPC(8): G01J1/08G01J3/02G01J3/42G01N21/27
CPCG01J3/0202G01J3/021G01J3/0232G01J3/0237G01J3/0291G01J3/0297G01J3/42G01N21/276G01N21/278
Inventor 费利克斯·克斯坦于尔根·格贝尔
Owner CARL ZEISS MICROSCOPY GMBH