US4964684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holographic image recording using liquid crystal
Assignee: Individual
•
Filing: 1988-12-28
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Granted: 1990-10-23
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Expires: 2008-12-28
Abstract
Abstract This invention pertains to holography and particularly to a novel method for producing holographic stereogram images from a sequential series of two dimensional images generated on a liquid crystal display matrix. Further a liquid crystal display matrix is used to generate a vertical slit aperture for the masking of a halographic plate.
Inventors
- 👤 John Iovine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:00
CPC Classifications
G; G03; G03H; G03H1/00; G03H1/26; G03H1/268
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A method of constructing a multiplex hologram of two dimensional images displayed on an LCD display, comprising: generating a series of two-dimensional images; displaying successive ones of said images on an LCD display matrix; providing a holographic plate to be exposed; directing an object beam of coherent radiation at the LCD display matrix so that the transmitted coherent radiation is incident on the holographic plate; directing a reference beam of coherent radiation at the holographic plate to produce, in combination with the transmitted object beam, a holographic interference pattern on the plate; and selectively exposing portions of the plate, through slit apertures in a second LCD display matrix, said portions corresponding to successive ones of the images to form a multiplex hologram on the plate.
Claim 2
Independent Claim
125 words
A method of constructing a multiplex hologram of two dimensional images displayed on an LCD display, comprising: generating a series of two-dimensional images; displaying successive ones of said images on an LCD display matrix; providing a holographic plate to be exposed; directing an object beam of coherent radiation at the LCD display matrix so that the transmitted coherent radiation is incident on the holographic plate; directing a reference beam of coherent radiation at the holographic plate to produce, in combination with the transmitted object beam, a holographic interference pattern on the plate; and selectively exposing portions of the plate, through slit apertures in a second LCD display matrix, said portions corresponding to successive ones of the images to form a multiplex hologram on the plate.
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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) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |