| 摘要 |
A novel photometer assembly which may be used in the ultra-violet region of the spectrum is disclosed. The assembly includes a single energy source and chopper assembly both of which service multiple photometer modules and therefore multiple optical paths. The photometer modules which are preferably of the double beam type including a reference and a sample beam, include fiber optical elements conducting rediation to and receiving radiation from a novel cuvette in which liquid samples may be received. The reference channel includes a cuvette with a reference fluid therein or may be simply a continuous fiber optical element. The radiation from each channel is chopped by a common chopper disk and supplied to a detector. A photometer module for differential photometry is described. Energy from the single source passes through the two channels and then is chopped at different frequencies before being recombined to fall on a single detector at a single location. |
