| 摘要 |
A shutter mechanism which includes simultaneous translation of a shutter in two planes of motion prolongs the life of the sealing material of the shutter as well as ensures that, when open, an optical beam passes through a sample compartment without interference or disruption. A further advantage of such a mechanism lies in the positive sealing of a port with sufficient pressure applied via the shutter plate to prevent vapor or fluid communication across the port.
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