Dennis L Hansen

US Patent:

59074167, May 25, 1999

Filed:

Jan 27, 1997

Appl. No.:

8/791019

Inventors:

Ronald G. Hegg - Vista CA
Chungte W. Chen - Irvine CA
John E. Gunther - Torrance CA
Dennis D. Hansen - Arlington TX

Assignee:

Raytheon Company - Lexington MA

International Classification:

G02B 532
G02B 2710

US Classification:

359 14

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.

US Patent:

54209404, May 30, 1995

Filed:

Feb 22, 1994

Appl. No.:

8/200854

Inventors:

Michael F. Sedlar - Walnut CA
Dennis D. Hansen - Glendora CA
George G. Sanford - Diamond CA

Assignee:

Hughes Training, Inc. - Arlington TX

International Classification:

G06K 936

US Classification:

382276

Abstract:

A method for improving CGSI imaging system throughput by selectively decimating rows and/or columns of object image data prior to warp transformation in order to more closely approach a 1:1 compression ratio. The best results are produced on compressed object image data prior to decompression.

US Patent:

53156927, May 24, 1994

Filed:

Aug 18, 1992

Appl. No.:

7/956313

Inventors:

Dennis D. Hansen - Glendora CA
Michael D. Sedlar - Walnut CA
James N. Clay - La Habra CA

Assignee:

Hughes Training, Inc. - Arlington TX

International Classification:

G06F 1562

US Classification:

395119

Abstract:

A computer-controlled imaging system for providing a realistic representation of a three-dimensional scene on a two-dimensional medium in which multiple objects, viewed from several aspects and which may be combined informing a scene, are stored in digital form on mass storage device is allocated amongst plural channels. A field-of-view computer controls the read out of the stored objects into a buffer memory where they become available for processing by a pipeline processor which is capable of warping the image in accordance with instructions from the field-of-view computer. These images in each channel are then arranged in an order of range from a viewer whereby more remote images are occluded by closer images. The images from all channels are then fed in raster scan format to a scene construction module where CGSI and special effects can be added to the composite scene prior to being fed to video display equipment.