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IMAGE DISPLAY DEVICE USING VARIABLE-FOCUS LENS AT CONJUGATE IMAGE PLANE

  • US 20100289970A1
  • Filed: 07/27/2010
  • Published: 11/18/2010
  • Est. Priority Date: 01/29/2008
  • Status: Active Grant
First Claim
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1. An image display device for optically displaying an image, comprising:

  • a light source;

    an imaging-light generator converting light emitted from the light source, into imaging light representative of the image to be displayed, to thereby generate the imaging light;

    a relay optical system focusing the imaging light emitted from the imaging-light generator, on an image plane which is located at an optically conjugate position to the imaging-light generator, the relay optical system defining a pupil through which the imaging light passes, within the relay optical system;

    a variable-focus lens disposed at a position generally coincident with the pupil, the variable-focus lens having a varying focal length; and

    a wavefront-curvature adjuster configured to vary the focal length by operating the variable-focus lens, to thereby adjust a wavefront curvature of the imaging light emitted from the relay optical system.

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