Optics: image projectors – Projected image combined with real object
Patent
1998-07-20
2000-03-28
Dowling, William
Optics: image projectors
Projected image combined with real object
348 13, G03B 2114
Patent
active
060422351
ABSTRACT:
An improved transmissive spatial object display provides a background image that appears to observers to have 3-D depth and includes the added advantages of permitting several viewers to observe the display simultaneously so that the background image appears on an accessible screen like that of televisions and computer monitors. A background image display is observed directly through a first Fresnel lens of a two Fresnel lens transmissive spatial object display which lens magnifies the background image display and also provides the front screen of the device. A first partially transparent mirror at 45 degrees separates the two Fresnel lenses permitting the background image display to be viewed solely through the first Fresnel lens. The first Fresnel lens serves the dual function of creating a first spatial object (in combination with the second Fresnel lens) and magnifying the background image. The magnified background image appears through the first Fresnel lens creating a pseudo 3-D appearance even though the background image is generated by a 2-dimensional display such as a CRT. Video production techniques can enhance this illusion of dimensionality through isolation of objects and graphics on a black field and use of dimensionalizing techniques such as reflections and shadings. Alternate embodiments provide projection of multiple spatial objects. Additional embodiments are configured without the second Fresnel lens so that the first Fresnel lens serves to magnify the background display's image and by itself creates the first spatial object.
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Machtig Jeffrey
McNelley Steve
Dowling William
Kirchanski, Esq. Stefan J.
Videotronic Systems
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