| 摘要 |
A reflector ( 14 ) reflects energy emitting from an energy source ( 16 ) and focuses and directs it to a target. An aperture stop or suppressor disk ( 18 ) is positioned between the energy source ( 16 ) and target. The outer periphery of the aperture stop or suppressor disk ( 18 ) is an irregular curve (FIGS. 12 and 13 ). This shape of the periphery prevents diffraction enhancement to the direct wave. In another emobidment, the suppressor disk ( 18 ) is replaced by a suppressor member ( 18' ) that is directly mounted on a frame portion of the energy source ( 16 ). This energy source ( 16 ) includes a spark-gap, or the like, and an open frame ( 36 ) that surrounds the spark-gap ( 52 ) or the like. This frame ( 32 ) includes a pair of laterally spaced apart frame members ( 42, 44 ) on the side of the frame ( 36 ) that faces the target (F 2 ). The suppressor member ( 18' ) is connected to these frame members ( 32, 44 ). It may have longitudinal grooves ( 48, 50 ) in its side edges into which the frame members ( 42, 44 ) snap-fit.
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