title: [A kind of method for measuring absorbance spectrum with dual beam light and one detector].
abstract: A kind of method of measuring spectral transmittivity with source compensated is introduced in this paper. It detects simultaneously intensity of source and transmission light with dual light road and one detector by means of the characters of selective frequence amplifing and coherent detection of a lock-in amplifier. The experimental result shows that the method is excellent on overcoming shake of a source and improving signal-to-noise ratio.
authors.affiliation: Department of Physics, Yunnan University, 650091 Kunming.
authors.forename: X
authors.initials: X
authors.lastname: Wen
authors.forename: L
authors.initials: L
authors.lastname: Lin
authors.forename: Y
authors.initials: Y
authors.lastname: Wu