Selective gating of radiation

• US 3,402,001 A
• Filed: 06/06/1963
• Issued: 09/17/1968
• Est. Priority Date: 06/06/1963
• Status: Expired due to Term

• Current Assignee: Harold Fleisher
• Original Assignee: Harold Fleisher
• Inventors: Fleisher, Harold
• Application Number:
  US04/286,087
• Time in Patent Office: 1,930 Days
• US Class Current: 359/250
• CPC Class Codes: G02F 1/03 based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect G02F1/061 takes precedence
• CPC Class Codes: G02F 1/29 for the control of the position or the direction of light beams, i.e. deflection
• CPC Class Codes: G02F 2203/28 focussing or defocussing
• CPC Class Codes: G02F 3/00 Optical logic elements; Optical bistable devices
• CPC Class Codes: H03K 17/78 using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled

Claims

9. AN ELECTROMAGNETIC RADIATION GATE COMPRISING:

A SUBSTANCE WHICH CHANGES THE STATE OF POLARIZAITON OF ELECTROMAGNETIC RADIATION PASSING THROUGH IT ONLY WHEN SAID SUBSTANCE IS ACTIVIATED IN THE PRESENCE OF AN ELECTRIC FIELD, A SOURCE OF PARALLEL, HIGH FREQUENCY ELECTROMAGNETIC RADIATION, AND MEANS TO SELECTIVELY IMPRESS AN ELECTRIC FIELD ACROSS SAID SUBSTANCE SUFFICIENT TO ACTIVATE SAID SUBSTANCE AT LOCATIONS WHICH DEFINE A FRESNEL PATTERN WHICH WILL DIFFRACT SAID RADIATION SUBSTANTIALLY TO A POINT, SAID MEANS TO IMPRESS AN ELECTRIC FIELD BEING TRANSPARENT TO SAID RADIATION, SAID RADIATION SOURCE BEING DIRECTED SUBSTANTIALLY PERPENDICULAR TO SAID PATTERN, WHEREBY SAID RADIATION IS FOCUSED SUBSTANTIALLY TO SAID POINT.