429results about How to "Wide field of view" patented technology

This invention concerns an ergonomic optical see-through head mounted display device with an eyeglass appearance. The see-through head-mounted display device consists of a transparent, freeform waveguide prism for viewing a displayed virtual image, a see-through compensation lens for enabling proper viewing of a real-world scene when combined together with the prism, and a miniature image display unit for supplying display content. The freeform waveguide prism, containing multiple freeform refractive and reflective surfaces, guides light originated from the miniature display unit toward a user's pupil and enables a user to view a magnified image of the displayed content. A see-through compensation lens, containing multiple freeform refractive surfaces, enables proper viewing of the surrounding environment, through the combined waveguide and lens. The waveguide prism and the see-through compensation lens are properly designed to ergonomically fit human heads enabling a wraparound design of a lightweight, compact, and see-through display system.

Conventional electro-optical imaging systems can not achieve wide field of view (FOV) and high spatial resolution imaging simultaneously due to format size limitations of image sensor arrays. To implement wide field of regard imaging with high resolution, mechanical scanning mechanisms are typically used. Still, sensor data processing and communication speed is constrained due to large amount of data if large format image sensor arrays are used. This invention describes an electro-optical imaging system that achieves wide FOV global imaging for suspect object detection and local high resolution for object recognition and tracking. It mimics foveated imaging property of human eyes. There is no mechanical scanning for changing the region of interest (ROI). Two relatively small format image sensor arrays are used to respectively acquire global low resolution image and local high resolution image. The ROI is detected and located by analysis of the global image. A lens array along with an electronically addressed switch array and a magnification lens is used to pick out and magnify the local image. The global image and local image are processed by the processor, and can be fused for display. Three embodiments of the invention are described.

A videoendoscopic surgery training system includes a housing defining a practice volume in which a simulated anatomical structure is disposed. Openings in the housing enable surgical instruments inserted into the practice volume to access the anatomical structure. A digital video camera is disposed within the housing to image the anatomical structure on a display. The position of the digital video camera can be fixed within the housing, or the digital video camera can be positionable within the housing to capture images of different portions of the practice volume. In one embodiment the digital video camera is coupled to a boom, a proximal end of which extends outside the housing to enable positioning the digital video camera. The housing preferably includes a light source configured to illuminate the anatomical structure. One or more reflectors can be used to direct an image of the anatomical structure to the digital video camera.

An object tracker comprises: a source of light; at least one illumination waveguide optically coupled to said source continuing at least one grating lamina for diffracting said light towards an external object; at least one detector waveguide containing a grating lamina for in-coupling and deflecting a first polarization of light reflected from said object into a first waveguide direction and deflecting a second polarization of light reflected from said object into a second waveguide direction; at least one detector optically coupled to said detector waveguide operative to receive light propagating in said first waveguide direction; and at least one detector optically coupled to said detector waveguide operative to receive light propagating in said second waveguide direction.