Patent US4707091A successfully refreshed from Google Patents.
US4707091A
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Ultraviolet method for making optical composites
Assignee: Individual
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Filing: 1984-09-06
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Granted: 1987-11-17
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Expires: 2004-09-06
Abstract
Abstract The invention provides a method of using the fundamental property of semiconductors to combine two or more photographic images into a single photographic image, the method involving the use of ultraviolet light to cause areas of a transparent semiconductor to become reflective and opaque so that portions of a projected background image can't pass through those parts of the semiconductor while portions of an appropriate foreground image reflect from them, thereby creating a composite image.
Inventors
- 👤 Dennis R. Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:39
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
104 words
A method of combining two or more separate images into an optical composite, which method comprises projecting onto a screen that contains transparent or translucent semiconductor material, with ultraviolet light whose photon energy exceeds the band-gap energy of the semiconductor material, a silhouette of each of the foreground images to be inserted into a background image; projecting onto the said screen from the front each of the appropriate foreground images such that each image appears on the screen congruent with its ultraviolet silhouette; projecting onto the screen from the rear the appropriate background image; and photographing the result from the front of the screen.
Claim 2
Independent Claim
104 words
A method of combining two or more separate images into an optical composite, which method comprises projecting onto a screen that contains transparent or translucent semiconductor material, with ultraviolet light whose photon energy exceeds the band-gap energy of the semiconductor material, a silhouette of each of the foreground images to be inserted into a background image; projecting onto the said screen from the front each of the appropriate foreground images such that each image appears on the screen congruent with its ultraviolet silhouette; projecting onto the screen from the rear the appropriate background image; and photographing the result from the front of the screen.
Claim 3
Independent Claim
101 words
A method of combining a foreground image or images and a background image into an optical composite, which method comprises projecting onto a transparent semiconductor plate from the rear the appropriate foreground images; projecting onto the said plate a uniform field of ultraviolet light whose photon energy exceeds the band-gap energy of the semiconductor material, the said field being prevented by mattes or by the foreground objects themselves from illuminating those parts of the plate occupied by the foreground images; projecting onto the plate from the front the appropriate background image; and photographing the result from the front of the plate.
Claim 4
Independent Claim
101 words
A method of combining a foreground image or images and a background image into an optical composite, which method comprises projecting onto a transparent semiconductor plate from the rear the appropriate foreground images; projecting onto the said plate a uniform field of ultraviolet light whose photon energy exceeds the band-gap energy of the semiconductor material, the said field being prevented by mattes or by the foreground objects themselves from illuminating those parts of the plate occupied by the foreground images; projecting onto the plate from the front the appropriate background image; and photographing the result from the front of the plate.
References Cited (Backward Citations)
US3149969A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |