Method of designing double incident slit spectrometer and double entrance slit spectrometer

摘要

A method of designing a double entrance slit spectrometer for constructing a spectrometer with a concave grating (G), two entrance slits (A1, A2) and two photodetectors (B1B2, B1'B2 ') and double entrance slit spectroscopy Wherein the designing method comprises the steps of: 1) determining the angle of incidence of the first entrance slit and the groove period of the concave grating; estimating the blaze angle of the concave grating to determine the surface material and the groove structure of the concave grating A step 3) of estimating an incident angle range and acquiring a wavelength-diffraction efficiency curve of the concave grating at a plurality of angles distributed when the incident angle is A 1 and within the incident angle range, Step 4) of determining the value of the angle of incidence A 2 and the values of the wavelengths 2 and 3, step 5) of obtaining the recording structure parameters and the use structure parameters, step 6) of determining the manufacturing parameters of the concave grating, Determining the positions of the two entrance slits and the two photodetectors, thereby constructing the spectrometer. The spectroscope obtained by the design method of the present invention can improve the diffraction efficiency in most of the spectral range.