Holographic display system

• Main Authors: GOTO; TUKASA, MIZUNO; TORU, KOIKE; SATOSHI, NANBA; SINZI
• Format: Patent
• Language: English
• Published: 23.05.1989
• Subjects: AIRCRAFT; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSIONTRANSMISSIONS IN AIRCRAFT; AUXILIARY DRIVES FOR VEHICLES; AVIATION; COSMONAUTICS; EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLYING SUITS; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PARACHUTES; PERFORMING OPERATIONS; PHYSICS; TRANSPORTING; VEHICLES IN GENERAL

A display source emits light. A first hologram (22) receives the light from the display source (21) and diffracts the received light. The light from the display source (21) is applied to the first hologram (22) at an incident angle A1 and moves from the first hologram at an outgoing angle B1. A second hologram (23) receives the light from the first hologram and diffractively reflects the received light. The light diffractively reflected by the second hologram (23) forms an image of the display source in viewer's field of view. The light from the first hologram is applied to the second hologram at an incident angle A2 and moves from the second hologram at an outgoing angle B2. The first and second holograms are nonparallel to remove a ghost image of the display source which would result from at least one of surface reflections at the first and second holograms. The first hologram has an angle theta relative to the second hologram. The angles A1, B1, A2, B2, and theta are in a fixed relationship to remove chromatic aberration which would result from the nonparallel arrangement of the first and second holograms.