| 摘要 |
The invention concerns a device for measuring the birefringent characteristics of a transparent medium (4), in particular a linear or circular birefringent, in which a light beam produced by a laser (1) passes successively through a polariser (6), an optical encoder (10), maintained by a housing (8), the central part of which (24) is rotating and comprises a birefringent shutter blade (22), said transparent medium (4), a circular filter (26) and at least a linear filter, to reach a photodetector (28), for measuring the light flux in one point, this photodetector being associated with computing means (18), characterised in that the polariser (6) placed upstream of the optical encoder (10) is integral with the housing (8) of the latter. |
