| 摘要 |
<p>Arrangement for restricting the transmission of electromagnetic radiation within a pre-determined waveband. The arrangement exhibits elements (1-3) which are placed in the path of the radiation and which are positioned one after the other along that path. In one or more spaces (4, 5) situated between them, said elements contain one or more gases which exhibit a considerable absorption capacity with regard to the radiation within the pre-determined waveband. </p> |
