| 摘要 |
An attenuated total reflectance (ATR) sensing head (10) for use in infra-red (IR) spectroscopy which includes a first IR transmissive body having a prismatic portion (12) which includes a sensing surface (42) for engagement with a sample material, and a second IR transmissive body (14). The prismatic portion (12) has firt IR input and output surfaces (40) which taper towards one another with increasing distance from the sensing surface, and is disposed in a recess formed in the second IR transmissive body, the latter having at least two surfaces (38) optically coupled to the first IR input and output surfaces (40). The angles of the surfaces of the first and second IR transmissive bodies cause polarised radiation to propagate through the ATR sensing head. This enables more accurate measurements to be made. |
