| 摘要 |
Device for analysis of substance has optically connected source of radiation, multi-pass optical cuvette that includes first mirror with maximal coefficient of reflection in which there is input opening, second mirror with output opening, photo-receiver of radiation, optical system for collection to photo-receiver of (N+1)/2 optical rays where N– optimum number of passes of those in cuvette for minimal measured concentration Xof analyzed substance in it. Optical system for collection is placed between the second mirror and photo-receiver of radiation, and its light diameter is larger than distance between inlet and outlet openings. Second mirror is made semi-transparent with optimal reflection coefficient R= ехр-(2XKL/(NXKL-1), where K – coefficient of absorption of analyzed substance, L – geometrical length of multi-pass cuvette, N – number of passes of ray in cuvette, X – concentration of substance being analyzed in cuvette. |
