Image display apparatus

Optical: systems and elements – Diffraction – Using fourier transform spatial filtering

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G02B 2746

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active

055791611

ABSTRACT:
An image display apparatus comprises an image display unit capable of producing and displaying not an image itself but a Fourier-transform image of the image, and a light transmission unit for focusing the Fourier-transform image produced and displayed on the image display unit on a pupil face of an observer's eye and producing an original image on the retina of the eye. The light transmission unit includes a lens and an eye lens such that an image-side focal position of the lens coincides with an object-side focal position of the eye lens. A mask is situated at the object-side focal position of the eye lens to determine the range and shape of a visual field. The image display unit is situated at an image-side focal position of the lens, and the pupil face of the observer's eye is alinged at an image-side focal position of the eye lens.

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patent: 5426521 (1995-06-01), Chen et al.
F. A. Jenkins and H. E. White, Fundamentals Of Optics, 4th ed. McGraw-Hill, 1981, pp. 259-265.
Patent Abstracts Of Japan, vol. 15, No. 309 (P-1235) Aug. 7, 1991 & JP-A-03 110 592 (Casio) May 10, 1991.
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SPIE Display System Optics, vol. 778, 1987, pp. 70-78, M. Shenker, "Optical Design Criteria For Binocular Helmet-Mounted Displays".

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