Patents Assigned to Virtual I/O
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Patent number: 5673151Abstract: The present invention eliminates the relay lens systems found in conventional helmet mounted displays (HMDs) by removing field distortions and aberrations with a contoured fiber optic faceplate placed in close proximity to a liquid crystal display (LCD) or cathode ray tube. The optical system typically consists of a spherical dielectric or holographically made collimator-combiner, a dielectric or holographically made fold mirror, and a contoured fiber optic faceplate. The fold mirror is flat, and the collimator-combiner is made by coating a spherical eye glass blank. The system is configured as a folded and tilted catadioptric projector with the novel feature being the contoured faceplate. There are no dispersive elements in the imaging assembly which means it can be completely polychromatic (full color) without the need for additional color correction optics as found in all refractive color systems.Type: GrantFiled: June 6, 1995Date of Patent: September 30, 1997Assignee: Virtual I/OInventor: Richard Dennis Rallison
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Patent number: 5642227Abstract: The present invention eliminates the relay lens systems found in conventional helmet mounted displays (HMDs) by removing field distortions and aberrations with a contoured fiber optic faceplate placed in close proximity to a liquid crystal display (LCD) or cathode ray tube. The optical system typically consists of a spherical dielectric or holographically made collimator - combiner, a dielectric or holographically made fold mirror, and a contoured fiber optic faceplate. The fold mirror is flat, and the collimator - combiner is made by coating a spherical eye glass blank. The system is configured as a folded and tilted catadioptric projector with the novel feature being the contoured faceplate. There are no dispersive elements in the imaging assembly which means it can be completely polychromatic (full color) without the need for additional color correction optics as found in all refractive color systems.Type: GrantFiled: June 6, 1995Date of Patent: June 24, 1997Assignee: Virtual I/O, Inc.Inventor: Richard Dennis Rallison
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Patent number: 5619377Abstract: The present invention eliminates the relay lens systems found in conventional helmet mounted displays (HMDs) by removing field distortions and aberrations with a contoured fiber optic faceplate placed in close proximity to a liquid crystal display (LCD) or cathode ray tube. The optical system typically consists of a spherical dielectric or holographically made collimator-combiner, a dielectric or holographically made fold mirror, and a contoured fiber optic faceplate. The fold mirror is flat, and the collimator-combiner is made by coating a spherical eye glass blank. The system is configured as a folded and tilted catadioptric projector with the novel feature being the contoured faceplate. There are no dispersive elements in the imaging assembly which means it can be completely polychromatic (full color) without the need for additional color correction optics as found in all refractive color systems.Type: GrantFiled: May 8, 1995Date of Patent: April 8, 1997Assignee: Virtual I/O, Inc.Inventor: Richard D. Rallison
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Patent number: 5526022Abstract: A sourceless orientation sensor having an azimuthal sensor which determines the azimuthal orientation relative to a planetary magnetic field, and a tilt sensor which determines the direction and magnitude of the displacement from vertical using the planetary gravitational field. The tilt sensor includes a transparent gas and a transparent viscous fluid in a spherical shell, a light emitting diode (LED) mounted at the top of the shell, and four photodetectors mounted at the bottom of the shell. As the tilt sensor is rotated the path of the light cone emanating from the LED and refracting at the gas/fluid interface is altered, thereby altering the intensity of light incident on the photodetectors. The magnitude of the light incident on the photodetectors is processed to provide the tilt angles. A thin transparent disk floats at the gas/fluid interface to damp surface waves caused by reorientation of the device.Type: GrantFiled: January 6, 1993Date of Patent: June 11, 1996Assignee: Virtual I/O, Inc.Inventors: Michael J. Donahue, Mark D. Pesce, Marc de Groot, Michael A. Perry, Donald E. Drumm
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Patent number: D375495Type: GrantFiled: July 20, 1995Date of Patent: November 12, 1996Assignee: Virtual I/O, Inc.Inventors: Scott Maclness, Christopher D. Wiegel, Jae P. Park
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Patent number: D383455Type: GrantFiled: August 31, 1995Date of Patent: September 9, 1997Assignee: Virtual I/O, Inc.Inventors: Scott MacInnes, Christopher D. Wiegel