MULTIPASS CELL, GAS ANALYZER, AND METHOD FOR MANUFACTURING MIRROR FOR MULTIPASS CELL

摘要

To provide a multipass cell (20) permitting a reduction in a volume of an inner space (S) into which sample gas is introduced, there are provided: a cell main body (1) with the inner space (S) into which the sample gas is introduced; and a pair of mirrors (2) provided oppositely to each other in the inner space (S), wherein light incident from an incidence window (W1) of the cell main body (1) is subjected to multireflection between the pair of mirrors (2) and is emitted from an emission window (W2) of the cell main body (1), wherein: each of the mirrors (2) is shaped such that light spots formed on a reflecting surface (21) of each of the mirrors (2) are scattered in an elongated region (Z) of a predetermined width through the light multireflection; and each of the mirrors (2) is formed into an elongated shape along a longitudinal direction of the elongated region (Z).