Diffraction smoothing aperture for an optical beam Patent #: 3980397
ApplicationNo. 538617 filed on 10/03/1983
US Classes:359/245, Electro-optic359/322Electro-optic crystal material
ExaminersPrimary: LaRoche, Eugene R.
Attorney, Agent or Firm
Foreign Patent References
International ClassG02F 001/01
AbstractA solid state shutter for blocking EMP is disclosed. The shutter includes thin films of amorphous semiconductor material fro the Group V or VI elements deposited on a silicon dioxide substrate. An antenna senses incident EMP causing a trigger circuit to apply a voltage across the thin films. The thin films switch from a state of high resistance to a state of low resistance for blocking passage of the EMP.