Patent CA593545A successfully refreshed from Google Patents.
US4741602A
Expired / Lapsed
US
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Spatial light modulator
Assignee: Hamamatsu Photonics KK
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Filing: 1986-07-21
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Granted: 1988-05-03
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Expires: 2006-07-21
Abstract
Abstract A spatial light modulator consists of an electron beam source formed within a vacuum envelope and an electro-optic crystal or organic film whose optical property changes corresponding to the charge stored on the surface thereof. The electro-optic crystal or organic film is fastened to the substrate through adhesive or the transparent conductive film which is covered with a low-vapor-pressure material.
Inventors
- 👤 Tsutomu Hara
- 👤 Yoshiji Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:26
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/0333
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
107 words
A spatial light modulator, comprising: a vacuum envelope; a source for an electron beam, within said envelope; a substrate; an electro-optical crystal having a surface and being disposed on said substrate; said crystal being located to be exposed to the electron beam in said envelope, and having means for storing a charge on said surface and an optical property which corresponds to the amount of the charge stored by said storing means; an adhesive fixing said crystal onto said substrate, said adhesive having an exposed portion; and a low vapor pressure material covering said exposed portion of said adhesive, said material forming an overcoat sealing said adhesive.
Claim 2
Dependent Claim
107 words
A spatial light modulator, comprising: a vacuum envelope; a source for an electron beam, within said envelope; a substrate; an electro-optical crystal having a surface and being disposed on said substrate; said crystal being located to be exposed to the electron beam in said envelope, and having means for storing a charge on said surface and an optical property which corresponds to the amount of the charge stored by said storing means; an adhesive fixing said crystal onto said substrate, said adhesive having an exposed portion; and a low vapor pressure material covering said exposed portion of said adhesive, said material forming an overcoat sealing said adhesive.
Claim 3
Dependent Claim
118 words
A spatial light modulator, comprising: a vacuum envelope; a source for an electron beam, within said envelope; a substrate; an adhesive on said substrate having an exposed portion; an organic film having a surface, said film having an exposed portion and being formed on said adhesive; said film being located to be exposed to the electron beam in said envelope, and having means for storing a charge on said surface and an optical property which corresponds to the amount of the charge stored by said storing means; and a low vapor pressure material covering said exposed portion of said adhesive and said exposed portion of said film, said material forming an overcoat sealing said film and said adhesive.
Claim 4
Dependent Claim
118 words
A spatial light modulator, comprising: a vacuum envelope; a source for an electron beam, within said envelope; a substrate; an adhesive on said substrate having an exposed portion; an organic film having a surface, said film having an exposed portion and being formed on said adhesive; said film being located to be exposed to the electron beam in said envelope, and having means for storing a charge on said surface and an optical property which corresponds to the amount of the charge stored by said storing means; and a low vapor pressure material covering said exposed portion of said adhesive and said exposed portion of said film, said material forming an overcoat sealing said film and said adhesive.
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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) | 1991-05-03 | 1991-11-02 | 1992-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-03 | 1995-11-02 | 1996-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-03 | 1999-11-02 | 2000-05-03 | $7700.00 | Window Closed / Lapsed |