Patent
Low-cost light-weight head-mounted virtual-image projection display with low moments of inertia and low center of gravity
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TLDR
In this paper, a head-mounted display device (10) offers light weight, a low center of gravity, and low moments of inertia about the azimuthal and elevational axes of head movement.Abstract:
A head-mounted display device (10) offers light weight, a low center of gravity, and low moments of inertia about the azimuthal and elevational axes of head movement. The display device (10) employs an angulated beam splitter mirror (16) disposed between a user's (22) eye (20) and an inner combiner surface (18a) of a visor (28). A projector (36) is carried laterally of the user's eye with a low center of gravity and a position close to the horizontal axis of elevational movement of the head. This projector (36) includes an image source (12) and a compact light-weight relay optics module (14) along with a projection fold mirror (30) disposed at eye level and laterally of the beam splitter mirror (16) to project image light to the beam splitter mirror (16). The beam splitter mirror (16) reflects the light onto the inner surface (18a) of the combiner (18) for reflection back through the beam splitter mirror (16) and to the user's eye (20). Alternative embodiments provide for color correction, or for mono-chrome image projection at even lighter weight. An alternative embodiment provides for both color correction and weight nearly as light as the monochrome version by use of diffractive lenses in the relay optics module.read more
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References
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Patent
Head mounted video display and remote camera system
TL;DR: In this paper, a video system was disclosed having a weapon-mounted video camera (12) transmitting video signals to a remotely located video display (14), where the video display is mounted to the helmet of a soldier and includes a sight reticle superimposed on the image of the target.
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TL;DR: In this paper, a two-dimensional image display element, a relay optical system, and a concaves mirror are used to project an image in the air as an enlarged image to the observer's eyeball.
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Optical display systems utilizing holographic lenses
TL;DR: In this paper, a holographic lens is used in conjunction with more conventional optical elements (lenses, mirrors and prisms) to present a high quality collimated virtual image of an object, such as the face of a cathode ray tube.
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Joseph T. Fournier,Stephen J. Simsbury Connecticut Us Smith,Harry R. McKinley,William E. Aberdeen Maryland Us Mclean +3 more
TL;DR: In this paper, the first image source for generating images comprising pilotage symbol information, the second image source sensing and generating images of the exterior scene, and relay optical components that optically superimpose the two images together and subsequently project the superimposed image into the observer's forward field of view.
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TL;DR: In this paper, a holographic objective system (HASO) produces an intermediate real image of information displayed on an electrically addressable spatial light modulator or SLM, the real image being collimated by a powered holographic reflector constructed as part of the visor of a helmet worn by the viewer.