Ronald T Smith: Quarter-wave film for brightness enhancement of holographic thin taillamp. Raytheon Company, Leonard A Alkov, Glenn H Lenzen Jr, April 28, 1998: US05745266 (142 worldwide citation)

A holographic thin rear exterior lamp for a vehicle including a light pipe (11) having first and second opposing surfaces (11a, 11b), a rear exterior lamp hologram (13, 113) attached to one of the first and second surfaces of the light pipe, a polarization rotating retarder film (16, 116) attached t ...

Ronald G Hegg, Ronald T Smith, Mao Jin Chern, John J Ferrer: Automotive instrument virtual image display. Hughes Aircraft Company, L A Alkov, W K Denson Low, January 11, 1994: US05278532 (89 worldwide citation)

A compact, inexpensive and mass-producible optical display system for an automobile creates a highly visible and sharp, high contrast and pleasing, multi-color magnified virtual image of a primary instrument cluster at a viewing distance which is greater than the actual optical distance between the ...

Jan Grinberg, Ronald T Smith: Color display device and method using holographic lenses. Hughes Aircraft Company, V D Duraiswamy, A W Karambelas, February 28, 1989: US04807978 (85 worldwide citation)

A system and method are described for achieving a high efficiency, full color display using color sensitive lenses such as holographic lenses. A lens assembly is composed of discrete lens elements (1, 2, 3) which are sensitive to different wavelengths bands of light. Each lens element (1, 2, 3) focu ...

Mao Jin Chern, Ronald T Smith, John W Peters: Process for forming a graded index optical material and structures formed thereby. Hughes Aircraft Company, Mary E Lachman, A W Karambelas, October 8, 1985: US04545646 (61 worldwide citation)

A process for depositing on the surface of a substrate a layer of a chosen material having continuous gradations in refractive index in a predetermined periodic pattern. The substrate is exposed to two vapor phase reactants which react upon radiation-inducement to produce the chosen material, and th ...

Ronald T Smith: Holographic backlight for flat panel displays. Hughes Electronics, Leonard A Alkov, Wanda K Denson Low, July 22, 1997: US05650865 (55 worldwide citation)

An improved holographic backlight and liquid crystal display system. The holographic backlight comprises a cold cathode fluorescent tube for providing white light, and a light pipe disposed to receive the white light. A phase retarding film layer is attached to a first surface of the light pipe. A d ...

Mao Jin Chern, John J Ferrer, Ronald T Smith: Graded index asperhic combiners and display system utilizing same. Hughes Aircraft Company, Leonard A Alkov, Wanda K Denson Low, November 6, 1990: US04968117 (54 worldwide citation)

An improved optical combiner useful in many applications is disclosed. The combiner includes a substrate with at least one aspheric surface and an diffraction-type reflective coating formed on the substrate for selectively reflecting radiation within one or more predetermined narrow band ranges of w ...

Ronald T Smith: Waveguide holographic telltale display. Hughes Aircraft Company, L A Alkov, W K Denson Low, August 23, 1994: US05341230 (48 worldwide citation)

A waveguide holographic telltale display for displaying images to a vehicle driver via the vehicle windshield. A light source injects light into the base of a clear inner windshield singlet. A mirror hologram between the inner and outer singlets confines a majority of the injected light to the inner ...

Mao Jin Chern, Ronald T Smith, Brent C Frogget: Holographic data storage and retrieval system. Hughes Aircraft Company, Leonard A Alkov, W K Denson Low, April 16, 1991: US05007690 (46 worldwide citation)

A plurality of reflective diffusing holographic memory elements (16) is positioned on a memory plate (14). An array (24) of detectors (22) faces at least one of the memory elements. A laser (26) illuminates the selected memory element and the data stored therein is reflected onto the array for readi ...

Ronald T Smith, Mao Jin Chern, Ronald G Hegg: Automotive head-up display with high brightness in daytime and high contrast in nighttime. Hughes Aircraft Company, Leonard A Alkov, Wanda K Denson Low, October 1, 1991: US05053755 (42 worldwide citation)

A head-up display having an image source for producing imaging illumination, an optical combiner for partially reflecting the imaging illumination to produce a virtual image of the image source that is viewable by the operator of the vehicle, and a polarizer which can be controllably interposed betw ...

Ronald T Smith: Dispersion-compensated windshield hologram virtual image display. Hughes Aircraft Company, Leonard A Alkov, Wanda Denson Low, January 1, 1991: US04981332 (42 worldwide citation)

A virtual image display including an image hologram, a dispersion compensating hologram for providing playback illumination to the image hologram, and an illumination source for providing playback illumination to the dispersion compensating hologram.