GB1334649A - Low light level television - Google Patents
Low light level televisionInfo
- Publication number
- GB1334649A GB1334649A GB1078772A GB1334649DA GB1334649A GB 1334649 A GB1334649 A GB 1334649A GB 1078772 A GB1078772 A GB 1078772A GB 1334649D A GB1334649D A GB 1334649DA GB 1334649 A GB1334649 A GB 1334649A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oscillator
- image intensifier
- monostable
- output
- low light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/40—Circuit details for pick-up tubes
Abstract
1334649 Television STANDARD TELEPHONES & CABLES Ltd 8 March 1972 10787/72 Heading H4F A low light television system includes a television camera optically coupled to the output of an image intensifier, the image intensifier being powered via a rectifying voltage multiplier from the output of an oscillator, Fig. 2d. The oscillator is powered by a signal from a monostable, Fig. 2b, triggered prior to the initiation of the vertical blanking pulse, Fig. 2c, to allow for delay due to the turn on period of the oscillator. Field frequency pulses, Fig. 2a, are produced by frequency-dividing in four divide-byfive stages, the output of a 31,250 Hz oscillator, the leading edge 21 of each pulse triggering the monostable to produce the signal of Fig. 2b and the trailing edge initiating the vertical blanking pulse, Fig. 2c. The oscillator controlling the image intensifier is fed from the monostable via a current limiting circuit which provides a form of automatic brightness control for the image intensifier.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1078772 | 1972-03-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1334649A true GB1334649A (en) | 1973-10-24 |
Family
ID=9974265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1078772A Expired GB1334649A (en) | 1972-03-08 | 1972-03-08 | Low light level television |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5241094B2 (en) |
| DE (1) | DE2310982A1 (en) |
| FR (1) | FR2175184B1 (en) |
| GB (1) | GB1334649A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59143640U (en) * | 1983-03-17 | 1984-09-26 | 大畠 庸男 | knife |
| JP3890744B2 (en) | 1998-05-27 | 2007-03-07 | 日本錬水株式会社 | Method for producing L-ribose using glucose as a starting material |
-
1972
- 1972-03-08 GB GB1078772A patent/GB1334649A/en not_active Expired
-
1973
- 1973-03-06 DE DE19732310982 patent/DE2310982A1/en active Pending
- 1973-03-08 FR FR7308323A patent/FR2175184B1/fr not_active Expired
- 1973-03-08 JP JP48026656A patent/JPS5241094B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5241094B2 (en) | 1977-10-17 |
| FR2175184A1 (en) | 1973-10-19 |
| DE2310982A1 (en) | 1973-09-13 |
| FR2175184B1 (en) | 1977-12-30 |
| JPS4912718A (en) | 1974-02-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |