Optical system for a head mounted display
First Claim
1. An optical system for a head mounted display apparatus comprising:
- a display for producing a source image;
a microprism beamsplitter located in front of said display, said microprism beamsplitter splitting said source image into a right eye image and a left eye image;
left and right eye deflection optical elements located in front of said microprism beamsplitter, said deflection optical elements deflecting said left and right eye images from said microprism beamsplitter;
at least one left eyepiece optical element located in front of said left eye deflection optical element; and
at least one right eyepiece optical element located in front of said right eye deflection optical element.
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Accused Products
Abstract
An optical system for a Head Mounted Display for a virtual reality system that employs a single high-resolution display to generate separate right-eye and left-eye images for presentation to a user. The display projects a single image onto an array of adjacent lenses that serve to magnify it, and to project the image onto an optically distant diffuser screen. The diffuser screen, which increases the angular dispersion of the image, is in close proximity to a columnar array of microprisms. The microprism beam splitter serves to split the single image into separate right-eye and left-eye component images, and to direct each component image to its respective eyepiece at an off-axis angle. The optical system further includes two separate eyepieces, each including Fresnel lens/prisms that redeflect their respective images onto optical axes which are parallel to, but laterally displaced from the original, central optical axis. Color correction is achieved by the use of a single diffraction grating that corrects the lateral color dispersion introduced by the deflecting Fresnel lens/prisms. A toroidal lens directly in front of each eye, but slightly displaced horizontally from the eye'"'"'s optical axis, serves to equalize the angular magnification in the x- and y-directions, while symmetrizing the y-axis astigmatism about the center of the eye.
117 Citations
18 Claims
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1. An optical system for a head mounted display apparatus comprising:
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a display for producing a source image; a microprism beamsplitter located in front of said display, said microprism beamsplitter splitting said source image into a right eye image and a left eye image; left and right eye deflection optical elements located in front of said microprism beamsplitter, said deflection optical elements deflecting said left and right eye images from said microprism beamsplitter; at least one left eyepiece optical element located in front of said left eye deflection optical element; and at least one right eyepiece optical element located in front of said right eye deflection optical element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An optical system for a head mounted display apparatus comprising:
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a display; a plurality of projection optical elements positioned in front of said display, said plurality of projection optical elements magnifying an image appearing on said display; a microprism beamsplitter located in front of said plurality of projection optical elements, said microprism beamsplitter splitting said magnified image into a right eye image and a left eye image; left and right eye deflection optical elements positioned in front of said microprism beamsplitter, said deflection optical elements deflecting said left and right eye images from said microprism beamsplitter; and a plurality of left eyepiece optical elements and a plurality of right eyepiece optical elements located respectively in front of said left eye deflection optical element and said right eye deflection optical element. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An optical system for a head mounted display apparatus comprising:
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a display; a plurality of projection optical elements positioned in front of said display, said plurality of projection optical elements magnifying an image appearing on said display; a diffusing screen positioned in front of said plurality of projection optical elements, said diffusing screen diffusing said magnified image; a microprism beamsplitter positioned in front of said diffusing screen, said microprism beamsplitter splitting said diffused image into a right eye image and a left eye image; a left eye deflection optical element, said left eye deflection optical element deflecting said left eye image from said microprism beamsplitter onto a left eye optical axis; a right eye deflection optical element, said right eye deflection optical element deflecting said right eye image from said microprism beamsplitter; a right eye diffraction grating located next to said right eye deflection optical element; a left eye diffraction grating located next to said left eye deflection optical element; a plurality of left eyepiece optical elements located in front of said left eye diffraction grating; and a plurality of right eyepiece optical elements located in front of said right eye diffraction grating. - View Dependent Claims (18)
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Specification