Optical system using total internal reflection images
First Claim
Patent Images
1. An optical system for a head mounted display comprising:
- a light pipe comprising a solid optical element having two parallel surfaces, the light pipe mountable to a head mounted display to direct light to a user'"'"'s eye;
an image source comprising a display element and an illumination element comprising a plurality of light sources, the image source disposed to direct light into the light pipe;
a collimating system between the illumination element and the display element, comprising a condensing lens element and a plurality of apertures each associated with a respective light source and located at or near the focal length of the condensing lens element; and
at least one aperture and an associated light source are located with respect to the central axis of the condensing lens element and the display element, so that modes from the illumination element enter the light pipe and are transmitted along the light pipe by total internal reflection off the two parallel surfaces.
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Abstract
An optical system for a head mounted display includes a light pipe having two parallel surfaces along which modes can travel by total internal reflection. An illumination element allows selection of modes so that the desired modes can be transmitted along the light pipe, either axially or by total internal reflection.
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Citations
28 Claims
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1. An optical system for a head mounted display comprising:
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a light pipe comprising a solid optical element having two parallel surfaces, the light pipe mountable to a head mounted display to direct light to a user'"'"'s eye; an image source comprising a display element and an illumination element comprising a plurality of light sources, the image source disposed to direct light into the light pipe; a collimating system between the illumination element and the display element, comprising a condensing lens element and a plurality of apertures each associated with a respective light source and located at or near the focal length of the condensing lens element; and at least one aperture and an associated light source are located with respect to the central axis of the condensing lens element and the display element, so that modes from the illumination element enter the light pipe and are transmitted along the light pipe by total internal reflection off the two parallel surfaces. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An optical system for a head mounted display comprising:
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a light pipe comprising a solid optical element having two parallel surfaces, the light pipe mountable to a head mounted display to direct light to a user'"'"'s eye; an image source comprising a display element and an illumination element comprising at least one light source, the image source disposed to direct light into the light pipe; and a collimating system between the illumination element and the display element, comprising a condensing lens element and an aperture located at a focal length of the condensing lens element, the aperture and the light source further located along an axis of the condensing lens element so that modes from the illumination element transmittable by total internal reflection off the two parallel surfaces along the light pipe are prevented from entering the light pipe. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification