Patent ID: 8577639
Filing Date: 2013-11-05
Classification: G01J

Abstract:
1. A calibration assembly for a spectrometer, the assembly comprising: a spectrometer having first through one hundredth detector elements, each of the first through one hundredth detector elements being assigned predetermined respective wavelength values (λ a first source emitting a first radiation for calibrating the spectrometer; a device placed in the path of the first radiation to split the first radiation into a first beam and a second beam; wherein one of the first and second beams travels a path-difference distance (d) longer than the other of the first and second beams; wherein the spectrometer is configured to generate an actual output signal when the first beam and the second beam enter the spectrometer; a controller operable for processing the actual output signal; wherein the controller is adapted to calculate respective correction factors for the respective wavelength values by comparing the actual output signal with a theoretically-predicted output signal; a first blocking device to selectively block the first beam and a second blocking device to selectively block the second beam; wherein the spectrometer is configured to generate a reference signal when the first beam is selectively blocked and the second beam enters the spectrometer; wherein the spectrometer is configured to generate a dark signal when the first beam and the second beam are selectively blocked from entering the spectrometer; an algorithm stored on and executable by the controller to cause the controller to;