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Abstract
Abstract APPARATUS IS DISCLOSED FOR SIMULTANEOUSLY PROJECTING ANY TWO SEPARATE IMAGES SELECTED FROM A MULTIPLE-IMAGEBEARING MEDIUM. TWO OPTICAL PROJECTING DEVICES ARE PROVIDED, EACH OF WHICH INCLUDES AN ILLUMINATING SOURCE AND AN OPTICAL DEVIATING ELEMENT FOR REDIRECTING LIGHT EMANATING FROM THE ILLUMINATION SOURCE SO THAT IT PASSES THROUGH THE MULTIPLE-IMAGE BEARING MEDIUM IN A DIRECTION SUBSTANTIALLY PERPENDICULAR TO THE SURFACE OF THE MEDIUM. PROJECTION LENSES ARE PROVIDED ON THE OPPOSITE SIDE OF THE MEDIUM FROM THE ILLUMINATING SOURCES TO FORM AN IMAGE FOR THE INFORMATION CONTAINED ON THE MEDIUM. AT LEAST ONE OF THE PROJECTING DEVICES, INCLUDING ITS COOPERATING LENS, IS MOVABLE AND THEREFORE EFFECTIVE TO PROJECT DIFFERENT IMAGES SELECTED FROM THE MULTIPLE IMAGE-BEARING MEDIUM. IN A PREFERRED EMBODIMENT, THE PROJECTED IMAGE PRODUCED BY EACH OPTICAL PROJECTING DEVICE CAN BE DISPLAYED UPON SEPARATE DISPLAY SCREENS.
Inventors
- 👤 Ulrich Staiger
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |