Optical: systems and elements – Diffraction – From grating
Patent
1993-05-26
1996-03-12
Dzierzynski, Paul M.
Optical: systems and elements
Diffraction
From grating
359 40, 359 48, 359619, 345 8, 351158, G02B 518
Patent
active
054991382
ABSTRACT:
An image display apparatus, for example, a spectacle-type image display apparatus, which is capable of reproducing a high-definition image by projecting pixels at a proper pitch on the retina in the user's eye. The image display apparatus includes a microlens array (3) having microlenses provided to correspond respectively to the pixels to converge beams of light emerging from the pixels, and a condenser lens (4) for converting beams of light emerging from the microlens array (3) into parallel beams of light and for leading them to the user's eyeball (7). Thus, a beam of light emerging from each pixel enters the microlens array (3), and the beam of light emerging from the microlens array (3) enters the condenser lens (4) where it is converted into a parallel beam of light, which is then led to the eyeball (7). Since an array of pixels is reconstructed at a proper pitch on the retina (6) in the eyeball (7), the user can perceive an image. In addition, since each pixel and the retina in the eyeball are in conjugate relation to each other, the image of each pixel is clearly formed on the retina. Accordingly, an image that is composed of such pixel images is also clear. Thus, the user can perceive a high-definition image. A Fresnel zone plate array may be used in place of the microlens array (3).
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Dzierzynski Paul M.
Jr. John Juba
Olympus Optical Co,. Ltd.
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