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LIGHT DEFLECTION BY EXTERNAL CONICAL REFRACTION

  • US 3,663,090 A
  • Filed: 07/10/1970
  • Issued: 05/16/1972
  • Est. Priority Date: 07/10/1970
  • Status: Expired due to Term
First Claim
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1. A crystal light deflector comprising a source of plane polarized, collimated light which directs said light along a first axis, a controled source of electric energy, an electrooptic continuous polarization rotator aligned with said axis and controlled by said source of electrical energy to rotate the plane of polarization of said plane polarized light through a range of angular positions, convergent optical means to produce from said collimated light after its emergence from said electrooptic continuous polarization rotator a cone of light having an apex, a biaxial birefringent crystal positioned in the path of said light, said crystal being oriented such that the refractive path of light is directed along a generator of said cone for the development of external conical refraction therein, whereby the emission of light therefrom is in a direction determined by the control of said source of electrical energy.

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