US3796901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube arrangement for recording ultra-high speed variations in high intensity light and method of operating the same
Assignee: Individual
•
Filing: 1971-09-16
•
Granted: 1974-03-12
•
Expires: 1991-09-16
Abstract
Abstract An electron tube arrangement for recording ultra-rapid variations in the intensity of light comprising means such operated that they impress upon the photoelectrons, as soon as emitted by the photocathode, an accelerating energy so high that the energy dispersion inherent to photoelectronic emission can be disregarded.
Inventors
- 👤 G Mayer
- 👤 G Wendt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:15
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H01J31/501; H01J31/502; H01J29/00; H01J29/46; H01J29/48; H01J29/481
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
292 words
An electron tube arrangement for recording ultra-rapid variations of the intensity of an incident light comprising: a tube having a photoelectron source for receiving said light and producing an output of photoelectrons in the form of a narrow strip, a luminescent screen for receiving said photoelectrons, means on the path of said photoelectrons between said source and said screen for accelerating said photoelectrons immediately after their emission from said source, said accelerating means including a first electrode immediately adjacent said photoelectron source, means for focusing the beam of electrons including said First electrode and two further electrodes, forming together a three consecutive electrode system, means for periodically deflecting said photoelectrons after emerging from said focusing means normally to their direction of propagation and to said narrow strip, and before they impinge upon said screen, said arrangement further comprising means for maintaining said first electrode at a sufficient positive potential with regard to said photoelectron source for establishing in the immediate vicinity of said source an electric field better than 104 volts/cm, so that the interval between the instants at which the electrons simultaneously emitted by said source reach said first electrode is less than three picoseconds and the dispersion of the electrons simultaneously emitted by said source, in terms of instants at which they impinge upon said screen, due to the energy dispersion inherent thereto, may be disregarded compared to the acceleration energy applied thereto by said accelerating means, and means for applying to the centrally located electrode of said system with respect to said photoelectron source a lower positive potential than the potential of said first electrode, but not less than half thereof, while the other of said two further electrodes is maintained at the same potential as said first electrode.
Claim 2
Dependent Claim
292 words
An electron tube arrangement for recording ultra-rapid variations of the intensity of an incident light comprising: a tube having a photoelectron source for receiving said light and producing an output of photoelectrons in the form of a narrow strip, a luminescent screen for receiving said photoelectrons, means on the path of said photoelectrons between said source and said screen for accelerating said photoelectrons immediately after their emission from said source, said accelerating means including a first electrode immediately adjacent said photoelectron source, means for focusing the beam of electrons including said First electrode and two further electrodes, forming together a three consecutive electrode system, means for periodically deflecting said photoelectrons after emerging from said focusing means normally to their direction of propagation and to said narrow strip, and before they impinge upon said screen, said arrangement further comprising means for maintaining said first electrode at a sufficient positive potential with regard to said photoelectron source for establishing in the immediate vicinity of said source an electric field better than 104 volts/cm, so that the interval between the instants at which the electrons simultaneously emitted by said source reach said first electrode is less than three picoseconds and the dispersion of the electrons simultaneously emitted by said source, in terms of instants at which they impinge upon said screen, due to the energy dispersion inherent thereto, may be disregarded compared to the acceleration energy applied thereto by said accelerating means, and means for applying to the centrally located electrode of said system with respect to said photoelectron source a lower positive potential than the potential of said first electrode, but not less than half thereof, while the other of said two further electrodes is maintained at the same potential as said first electrode.
Claim 3
Dependent Claim
49 words
A tube arrangement as in claim 1 wherein said photoelectron source comprises a photocathode and spectrograph means located between said photocathode and said accelerating electrode, said spectrograph means being provided with at least one diaphragm facing said accelerating electrode and carrying an aperture in form of said narrow strip.
Claim 4
Dependent Claim
19 words
A tube arrangement as in claim 1 wherein said electrodes are coaxial cylinders of revolution having the same axis.
Claim 5
Dependent Claim
20 words
A tube arrangement as in claim 1 wherein said electrodes are each in the form of a pair of plates.
Claim 6
Dependent Claim
30 words
A tube arrangement as in claim 4 wherein said further accelerating electrode is directed normally to said first mentioned accelerating electrode and to the direction of propagation of said photoelectrons.
Claim 7
Dependent Claim
22 words
A tube arrangement as in claim 1 wherein said deflecting means further include means for exerting a focusing action on said photoelectrons.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |