METHOD FOR SYNTHESIZING SPECTRUM AND SPECTRUM SYNTHESIZING DEVICE USED THEREIN

摘要

PURPOSE:To obtain accurate spectrum over wide wavelength range by making wavelengths deviate in a wavelength overlapped area so that the spectral waveforms may be the most similar and elongating and contracting the entire spectrum in accordance with the deviation of the wavelength. CONSTITUTION:A photodiode array 15 moves an optical system consisting of a collimator lens 12, a slit 13 and a concave diffraction grating 14 so that the spectra of plural wavelength areas whose parts are overlapped are obtained. A controller 17 fetches data from a memory 31 where each spectral data is stored and a wavelength correction means 32 makes the endpoint of one spectrum or the endpoints of both spectra deviate in a wavelength direction in both areas where the wavelengths of plural spectra are overlapped so that the waveforms of both spectra may become the most similar and distributes the deviation at the endpoint by taking the wavelength calibration point of the spectrum as reference. Then, the entire spectrum is elongated and contracted in the wavelength direction so that the wavelengths may be overlapped. The synthesized spectrum obtained by a spectral intensity correction means 33 is stored in the memory 31 and displayed on a display unit 18 if necessary.