US4818983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical image generator having a spatial light modulator and a display device
Assignee: Hamamatsu Photonics KK
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Filing: 1986-08-07
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Granted: 1989-04-04
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Expires: 2006-08-07
Abstract
Abstract An optical image generator includes a spatial light modulator and a display device. The spatial light modulator contains a material whose optical property can be changed corresponding to a change in the image pattern of an electronic charge emitted from a photocathode, so that the image pattern can be written into the material. The display device contains a two-dimensional light emitting diode (LED) or a liquid crystal display of matrix type which is arranged against the photocathode of the spatial light modulator.
Inventors
- 👤 Tsutomu Hara
- 👤 Yoshiji Suzuki
- 👤 Naohisa Mukouzaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:18
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/0333
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
An optical image generator, comprising: a spatial light modulator, said spatial light modulator including a photocathode and a crystal material whose optical property changes with the charge thereon, which can be changed corresponding to the change in a two-dimensional image pattern impinging on the photocathode, the spatial light modulator additionally including a microchannel plate between the photocathode and the crystal material; and a display device, said display device including a light emitting element matrix array controlled by a computer and arranged adjacent said photocathode.
Claim 2
Dependent Claim
84 words
An optical image generator, comprising: a spatial light modulator, said spatial light modulator including a photocathode and a crystal material whose optical property changes with the charge thereon, which can be changed corresponding to the change in a two-dimensional image pattern impinging on the photocathode, the spatial light modulator additionally including a microchannel plate between the photocathode and the crystal material; and a display device, said display device including a light emitting element matrix array controlled by a computer and arranged adjacent said photocathode.
Claim 3
Dependent Claim
20 words
An optical image generator according to claim 1, wherein said light emitting element matrix array is an LED matrix array.
Claim 4
Dependent Claim
21 words
An optical image generator according to claim 1, wherein said light emitting element matrix array is a plasma display matrix array.
Claim 5
Dependent Claim
81 words
An optical image generator, comprising: a spatial light modulator, said spatial light modulator including a photocathode and a crystal material whose optical property changes with the charge thereon, which can be changed corresponding to the change in a two-dimensional image pattern impinging on the photocathode, the spatial light modulator additionally including a microchannel plate between the photocathode and the crystal material; and a display device, said display device including an LC device controlled by a computer and arranged adjacent said photocathode.
Claim 6
Dependent Claim
81 words
An optical image generator, comprising: a spatial light modulator, said spatial light modulator including a photocathode and a crystal material whose optical property changes with the charge thereon, which can be changed corresponding to the change in a two-dimensional image pattern impinging on the photocathode, the spatial light modulator additionally including a microchannel plate between the photocathode and the crystal material; and a display device, said display device including an LC device controlled by a computer and arranged adjacent said photocathode.
Claim 7
Dependent Claim
45 words
An optical image generator as claimed in claim 4, further comprising means for generating light which is projected through said LC device, and means including an optical lens and a fiber plate system for conveying the light projected through the LC device to the photocathode.
Claim 8
Dependent Claim
52 words
An optical image generator claim 4, further comprising a fiber plate, and means for generating light which is projected through said LC device, wherein said two-dimensional image pattern impinging on said photocathode is that which is projected through said LC device directly onto said photocathode and passing only through the fiber 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) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |