One embodiment is directed to a system for enabling two or more users to interact within a virtual world comprising virtual world data, comprising a computer network comprising one or more computing devices, the one or more computing devices comprising memory, processing circuitry, and software stored at least in part in the memory and executable by the processing circuitry to process at least a portion of the virtual world data; wherein at least a first portion of the virtual world data originates from a first user virtual world local to a first user, and wherein the computer network is operable to transmit the first portion to a user device for presentation to a second user, such that the second user may experience the first portion from the location of the second user, such that aspects of the first user virtual world are effectively passed to the second user.

System and method for augmented and virtual reality

A visual display device is provided for delivering a generated image, preferably combinable with environment light, to the eye of a user. The device is lightweight and compact but yields a high quality image. In one embodiment, a shroud protects from stray light and holds optical elements in desired alignment. In one embodiment an image generator is masked by at least two masks to provide for a high quality image without waste. In one embodiment, a removably mounted shield or activatable device and convert the apparatus from a see-through device to an immersion device and back again. In one embodiment, the device can be comfortably mounted to the user's head while still allowing for use of conventional eyeglasses. A tracker for outputting an indication of the orientation, attitude and/or position of a head-mounted display (HMD) may be provided. The tracker can be configured so that it is incorporated in the HMD housing and/or can be easily decoupled from the HMD, so that the HMD can be used without the tracker (e.g. for watching movies). Preferably, decoupling involves unplugging a single electrical connector (such as a cable) and unfastening a mechanical connection (such as a strap). Preferably the tracker provides pass-through of signal to the HMD and, when the tracker is coupled to the HMD, only a single cable or other data link connects the HMD-tracker combination to the host computer. In one embodiment, the tracker uses magnetic sensors. In another embodiment, one or more inertial sensors, such as a rate gyro and/or accelerometers are used.

Head-mounted personal visual display apparatus with image generator and holder

One embodiment is directed to a user display device comprising a housing frame mountable on the head of the user, a lens mountable on the housing frame and a projection sub system coupled to the housing frame to determine a location of appearance of a display object in a field of view of the user based at least in part on at least one of a detection of a head movement of the user and a prediction of a head movement of the user, and to project the display object to the user based on the determined location of appearance of the display object.

Display system and method

A visual display device is provided for delivering a generated image, preferably combinable with environment light, to the eye of a user. The device is lightweight and compact but yields a high quality image. In one embodiment, a color shutter provides a high-density color image. In one embodiment, a shroud protects from stray light and holds optical elements in desired alignment. In one embodiment an image generator is masked by at least two masks to provide for a high quality image without waste. In one embodiment, a removably mounted shield or activatable device can convert the apparatus from a see-through device to an immersion device and back again. In one embodiment, the device can be comfortably mounted to the user's head while still allowing for use of conventional eyeglasses. In one embodiment various controls, such as a mute button, volume control and the like can be provided, such as by mounting on the head-mounted display device.

Personal visual display system

A system for providing real-time or near real-time situational awareness for a structure includes a database module for storing structural information associated with the structure. The system includes a situational awareness module for gathering situational awareness information associated with the structure. The system includes a three-dimensional (3-D) rendering module in communication with the database module and the situational awareness module for rendering a 3-D virtual model of the structure utilizing the structural information associated with the structure, and for integrating into the 3-D virtual model the situational awareness information associated with the structure. The system includes a graphical user interface module in communication with the 3-D rendering module for displaying to a user the 3-D virtual model of the structure integrating the situational awareness information associated with the structure.

Computer-based system and method for providing situational awareness for a structure using three-dimensional modeling

A system for predicting head movements by an aircrew member, such as a pilot flying a tactical aircraft, from input data which includes an ongoing record of head positions. The input is without head acceleration or velocity input data and is applied to a Least Mean Square prediction algorithm. The disclosure also includes an improved data dependent convergence algorithm for the prediction system, an algorithm shown to provide rapid convergence to the final prediction output. Use of the prediction system to make the delay between actually viewed and HMD presented images and other flight video images acceptable from a human engineering and disoriented pilot avoidance viewpoint is also disclosed. A computer program embodiment of the system using head movement data is included.

Helmet mounted display adaptive predictive tracking

This invention comprises a device for preventing the clogging of gutters and downspouts with leaves and other debris and includes an auger means which extends into the mouth of the downspout, and means responsive to the wind for rotating the auger means within the mouth of the downspout in a direction to drive the leaves and other debris downward through the downspout.

Device for preventing the clogging of gutters and downspouts

This process of cleaning fur coats includes a new method which permits the fur of the coat to be thoroughly cleaned without removing the lining and without impregnating the lining and crevices thereof with sawdust during the cleaning process. Heretofore in using the well known "furrier method"...

Process of cleaning fur coats

Gripping and securing mechanism

This invention relates to the method of making fur coats wherein after the fur has been sewed together and cut out in the flat pattern for the particular size and style of coat, the leather is prepared for the regular lining, and then the lining is attached in place. The method includes preparing...

Method of making fur coats

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