Raymond EMC manufactures your shielded windows to custom sizes that easily interface with your existing shielding system, and with all Raymond EMC’s shielding systems. They provide various levels of shielding effectiveness based on your precise needs.
Their basic line of shielded windows achieve RF isolation of 40 dB from 1 to 5 GHz.
Copper screen windows
Their copper screen window achieves a higher performance, up to 10 GHz. The window is see-through but not entirely clear.