Laser-line reflective optical path gas analyzer means

The present invention provides a reflection-type laser-line gas analyzer light path apparatus comprising: a laser sequentially connected transmit receive unit, to the background cell line monitoring unit, and a laser reflector unit; laser transmitting and receiving unit includes a tunable laser, a wedge mirror first, the reference cell, a detector, two detectors and three detectors, the detector and the reference cell main optical axis direction of a tunable laser emits a laser beam normal to the direction symmetric with respect to a first surface of a wedge-shaped mirror ; to the background unit comprises two wedge-shaped mirror; reflecting the laser unit comprises a wedge angle of the mirror and the three mirrors. The present invention is measured by the optical path gas is doubled, the analyzer greatly improved sensitivity and detection limits; easy installation; real-time online measurement; fewer optical components, a simple structure, can also be non-professionals to complete the optical path debugging and installation.