| 摘要 |
<p>The installation has an inlet slot (5) of a spectrometer with a photoelectric receiver arranged at its outlet (7) as well as a polarization prism (4) so arranged that the beam is divided into two parts (2, 3) of which the polarization planes are mutually perpendicular, the separation being effected in the direction of the longitudinal axis of the inlet slot (5). Between the polarization prism (4) and the inlet slot (5) in a location where the beams (2, 3) are separated, there is provided a manoeuvrable shutter (9) which alternatingly allows either one or the other of the beams (2, 3) to pass.</p> |
