| 摘要 |
The infrared gas analyser contains a light source (1) and - arranged one after another in the beam path - spherical mirrors (2) for dividing the beam into two parallel light fluxes, a light modulator (8), infrared filters (3), a measurement and a comparison channel, a light detector (7), and a synchronising unit. The light modulator (8) is constructed in the form of two identical wings (12), which are mounted on an axis of rotation (9) and pivoted relative to one another by 180 DEG about this axis (9), and each of which is configured as a sector of the circumferential surface of a straight conical frustum. The small circular surfaces of the cones forming the wings (12) cover one another, while the axis of rotation (9) of the light modulator (8) coincides with the axes of symmetry of the two conical frustums and extends perpendicular thereto in a plane in which the optical axes (10) of the parallel light fluxes lie. The infrared gas analyser is used in the production of spectrophotometers, filter analysers and other optical devices. <IMAGE>
|
