Patent US3553518A successfully refreshed from Google Patents.
US3553518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image intensifiers for night vision
Assignee: US Philips Corp
•
Filing: 1968-08-09
•
Granted: 1971-01-05
•
Expires: 1988-08-09
Abstract
Abstract An image intensifier suitable for night vision which employs a channel intensifier, i.e., a plate-shaped resistive matrix provided with conductive coatings on opposite major faces which constitute input and output electrodes respectively connected by elongated passageways in the matrix which constitute secondary emissive channels. A photocathode responsive to infrared and near infrared radiation is positioned opposite the input electrode while a luminescent screen is positioned opposite the output electrode and luminesces under electron impact in the visible spectrum adjoining the infrared portion of the spectrum, i.e., in the red wavelengths.
Inventors
- 👤 Pieter Schagen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:38
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H01J31/506; H01J31/507; C; C09; C09K; C09K11/00; C09K11/08; C09K11/70
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
125 words
An electronic image intensifier tube suitable for night vision which tube comprises a plate-shaped rEsistive matrix the major surfaces of which constitute input and output faces of the matrix, a conductive layer on the input face of the matrix serving as an input electrode, a separate conductive layer on the output surface serving as an output electrode, said matrix having a plurality of elongated channels each providing a passageway connecting said input and output electrodes with secondary emission taking place in said channels, an infrared sensitive photo-cathode on the input side of said matrix, and a luminescent viewing screen on the output side of said matrix, said screen luminescing upon electron excitation substantially only in the red region of the visible portion of the spectrum.
Claim 2
Dependent Claim
125 words
An electronic image intensifier tube suitable for night vision which tube comprises a plate-shaped rEsistive matrix the major surfaces of which constitute input and output faces of the matrix, a conductive layer on the input face of the matrix serving as an input electrode, a separate conductive layer on the output surface serving as an output electrode, said matrix having a plurality of elongated channels each providing a passageway connecting said input and output electrodes with secondary emission taking place in said channels, an infrared sensitive photo-cathode on the input side of said matrix, and a luminescent viewing screen on the output side of said matrix, said screen luminescing upon electron excitation substantially only in the red region of the visible portion of the spectrum.
Claim 3
Dependent Claim
19 words
A tube as claimed in claim 1 wherein the viewing screen employs a phosphor of the zinc-phosphate manganese-activated type.
References Cited (Backward Citations)
US2905844A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |