With each grating , you consider its groove density ( which helps determine the resolution ) , its spectral range ( which helps determine the wavelength range ) and its blaze wavelength ( which helps determine the most efficient range ) 對每個光柵都要考慮其條紋密度(有助于確定分辨率) 、光譜覆蓋范圍(有助于確定波長范圍)以及閃耀波長(有助于確定最佳效率范圍) 。