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Optical scanning system for scanning object with light beam and displaying apparatus

  • US 5,144,471 A
  • Filed: 06/26/1990
  • Issued: 09/01/1992
  • Est. Priority Date: 06/27/1989
  • Status: Expired due to Fees
First Claim
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1. An electromagnetic radiation beam scanning system comprising:

  • a light modulation layer showing an electro-optic effect;

    first and second electrodes sandwiching said light modulation layer, said first electrode having a transparent section and a pair of terminal sections placed at end portions of said transparent section, an impedance of each of said pair of terminal sections being much lower than an impedance of said transparent section;

    first and second polarizers sandwiching said light modulation layer;

    first power source means for applying a first voltage to said pair of terminal sections;

    second power source means for applying a second voltage to said second electrode; and

    light source means or emitting an electromagnetic radiation beam toward said light modulation layer,wherein said light modulation layer has an elongated region in which an effective voltage for the electro-optic effect becomes zero in response to application of said voltages to said pair of terminal sections nd second electrode due to said first and second power source means thereby causing said light modulation layer, combined with said polarizers, to produce a narrowed beam when a light beam is introduced thereto from said light source means.

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