Wide FOV simulator heads-up display with selective holographic reflector combined
AssigneeRaytheon Company
InventorsRonald G. Hegg, Chungte W. Chen, John E. Gunther, Dennis D. Hansen
Life of this patent
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Abstract
A wide field-of-view simulator heads-up display provides images to a user along an optical axis. A HUD CRT provides images of a predetermined design wavelength, while rear projection screen CRTs provide out-of-window scenery that does not contain the predetermined design wavelength. A curved holographic combiner is mounted on the optical axis with a reflective hologram on a concave surface covered with a urethane overcoat. The convex surface has an antireflective coating. A tilted beamsplitter cooperates with a folding mirror in a relay optical system for providing a virtual image of the HUD CRT for reflection from the holographic combiner.
Claims15
A wide FOV simulator heads-up display for providing images to a user along an optical axis, comprising:
- a first image source, including first images of a predetermined design wavelength;
- a second image source, including second images which do not contain the predetermined design wavelength;
- means for providing the second image source on the optical axis;
- a holographic combiner;
- a beamsplitter;
- and
- a relay optical system for directing the first image source after reflection from the beamsplitter to the holographic combiner to provide a virtual image of the first image source in combination with the second image on the optical axis.
A wide FOV simulator heads-up display for providing images to a user along an optical axis, comprising:
- an image source;
- a holographic combiner;
- a beamsplitter;
- and
- a relay optical system for directing the image source after reflection from the beamsplitter to the holographic combiner to provide a virtual image of the image source including three lens units and including a meniscus lens concave towards the virtual image side of the optical axis.
A wide FOV simulator heads-up display providing images to a user along an optical axis, comprising:
- a first image source positioned off of the optical axis emitting light of a predetermined design wavelength;
- a second image source emitting light at a wavelength other than the predetermined design wavelength;
- a holographic combiner oriented on the optical axis with its center of curvature on the optical axis for transmitting a second image from the second image source to the user along the optical axis;
- a beamsplitter positioned on the optical axis and forming an acute angle with the optical axis and tilted so that an edge is disposed toward the user;
- and
- a relay optical system for directing a first image from the first image source to the beamsplitter to provide a virtual image of the first image to the user along the optical axis.
A wide FOV simulator heads-up display providing images to a user along an optical axis, comprising:
- a plurality of image sources, each directing light along an optical path, a curved holographic combiner including a transparent substrate having a urethane protective coating on a convex side and an antireflection coating on a concave side, the holographic combiner adapted to receive light from one of the plurality of image sources;
- a beamsplitter coupled with the holographic combiner and disposed along the optical axis;
- and
- a relay optical system for directing light from the image sources to the beamsplitter to provide a virtual image.
Dependencies are inferred from the claim text.