US3558956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray tube
Assignee: FIZICHESKY INST IM LEBEDEVA
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Filing: 1968-02-20
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Granted: 1971-01-26
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Expires: 1988-02-20
Abstract
Abstract A cathode-ray tube whose screen is essentially a semiconductor quantum generator formed by an optical resonator and an active medium placed therein. The active medium is a film of semiconductor material deposited on a substrate and capable of induced light emission and amplification at the density of electrons in the beam sufficient to bring about an inversion of energy levels in the semiconductor film. One of the reflecting surfaces of the optical resonator is the surface of the film exposed to the electron beam inside of the tube envelope.
Inventors
- 👤 Nikolai Gennadievich Basov
- 👤 Oleg Vladimirovic Bogdankevich
- 👤 Alexandr Sergeevich Nasibov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:37
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/0955; H01S3/0959; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/187; H01J29/28
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
42 words
A cathode-ray tube as defined in claim 1, wherein the substrate is made optically transparent, and the optical resonator is formed by the film surface exposed to the electron beam and a reflective coating deposited on a substrate outside the evacuated envelope.
Claim 2
Dependent Claim
27 words
A cathode-ray tube as defined in claim 1, wherein the film surface exposed to the electron beam has a thin dielectric coating which reflects the light emission.
Claim 3
Dependent Claim
36 words
A cathode-ray tube as defined in claim 1, wherein outside the evacuated tube envelope and parallel to the film surface there is placed a semitransparent reflector which forms, together with said film surface, the optical resonator.
Claim 4
Dependent Claim
60 words
A cathode-ray tube as defined in claim 1, wherein the substrate is optically nontransparent, and the resonator is formed by the film surface exposed to the electron beam and the fully reflective surface of the substrate, as a result of which the light emission from the screen radiates in the reverse direction relative to the direction of the electron beam.
Claim 5
Dependent Claim
22 words
A cathode-ray tube as defined in claim 1, wherein the film capable of induced light emission and amplification is of gallium arsenide.
Claim 6
Dependent Claim
22 words
A cathode-ray tube as defined in claim 1, wherein the film capable of induced light emission and amplification is of gallium arseno-phosphide.
Claim 7
Dependent Claim
22 words
A cathode-ray tube as defined in claim 1, wherein the film capable of induced light emission and amplification is of zinc selenide.
Claim 8
Dependent Claim
22 words
A cathode-ray tube as defined in claim 1, wherein the film capable of induced light emission and amplification is of cadmium selenide.
Claim 9
Dependent Claim
22 words
A cathode-ray tube as defined in claim 1, wherein the film capable of induced light emission and amplification is of cadmium sulfide.
Claim 10
Dependent Claim
22 words
A cathode-ray tube as defined in claim 1, wherein the film capable of induced light emission and amplification is of zinc sulfide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |