GB908685A - Improvements in or relating to arrangements embodying radiation sensitive devices - Google Patents
Improvements in or relating to arrangements embodying radiation sensitive devicesInfo
- Publication number
- GB908685A GB908685A GB7735/58A GB773558A GB908685A GB 908685 A GB908685 A GB 908685A GB 7735/58 A GB7735/58 A GB 7735/58A GB 773558 A GB773558 A GB 773558A GB 908685 A GB908685 A GB 908685A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- lag
- pick
- signal
- image
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Closed-Circuit Television Systems (AREA)
Abstract
908,685. Television. ELECTRIC & MUSICAL INDUSTRIES Ltd. Feb. 26, 1959 [March 11, 1958], No. 7735/58. Class 40 (3). The effect of lag in a television pick-up tube 1 is reduced by applying the output signal to produce an image on a cathode-ray tube 4, viewing the image by a second pick-up tube 5 which also exhibits lag so as to produce a signal having a lag component of greater amplitude (i.e. a component due to tube 1 plus that due to tube 5), and subtracting in a stage 8 the signal from tube 5 from that due to tube 1 which is applied to stage 8 via an amplifier 7. Preferably the luminance of the image produced by tube 4 and the optical transmission of lens 6 are chosen so that the lag of tube 5 equals the lag of tube 1. It is shown that under these conditions, if the signal from tube 1 is amplified to twice the amplitude of that from tube 5, the lag components substantially cancel in the output of subtractor 8. Reference is made to photo-conductive, photoemissive and image-type pick-up tubes, and also tubes responsive to infra-red and X-rays. The invention may be applied to framesequential or simultaneous colour television by the provision of a display tube 4 and pick-up tube 5 combination for each colour component. Alternatively a single combination may be provided for a luminance signal formed by appropriate combination of the component colour signals. By attenuating the high frequency components produced by pick-up tube the high frequency components appearing at the output of subtractor 8 may be accentuated to introduce aperture correction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7735/58A GB908685A (en) | 1958-03-11 | 1958-03-11 | Improvements in or relating to arrangements embodying radiation sensitive devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7735/58A GB908685A (en) | 1958-03-11 | 1958-03-11 | Improvements in or relating to arrangements embodying radiation sensitive devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB908685A true GB908685A (en) | 1962-10-24 |
Family
ID=9838723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7735/58A Expired GB908685A (en) | 1958-03-11 | 1958-03-11 | Improvements in or relating to arrangements embodying radiation sensitive devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB908685A (en) |
-
1958
- 1958-03-11 GB GB7735/58A patent/GB908685A/en not_active Expired
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