GB644736A - Improvements relating to cathode ray tube display apparatus - Google Patents

Improvements relating to cathode ray tube display apparatus

Info

Publication number
GB644736A
GB644736A GB2069948A GB2069948A GB644736A GB 644736 A GB644736 A GB 644736A GB 2069948 A GB2069948 A GB 2069948A GB 2069948 A GB2069948 A GB 2069948A GB 644736 A GB644736 A GB 644736A
Authority
GB
United Kingdom
Prior art keywords
tube
light
intensity
crt1
ray tube
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
Application number
GB2069948A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Metropolitan Vickers Electrical Co Ltd
Original Assignee
Metropolitan Vickers Electrical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Metropolitan Vickers Electrical Co Ltd filed Critical Metropolitan Vickers Electrical Co Ltd
Priority to GB2069948A priority Critical patent/GB644736A/en
Publication of GB644736A publication Critical patent/GB644736A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds
    • G01S13/538—Discriminating between fixed and moving objects or between objects moving at different speeds eliminating objects that have not moved between successive antenna scans, e.g. area MTi
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

644,736. Light-sensitive control apparatus. SHAND, G., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Aug. 5, 1948, No. 20699. [Class 40 (iii)] [Also in Group XL (c)] Cathode-ray tube apparatus for displaying radar signals comprises a main cathode-ray tube CRT1 on which the signals from receiver R are impressed by intensity modulation to give a plan-position indication. Also provided is a second tube CRT2 scanned in synchronism with the first by connection to common scan generator SG but having a constant intensity light spot. Light from this second tube is directed by lens system L on to light-sensitive cell PC whose amplified output is fed to video amplifier VID (or to control the intensity of the spot on CRT1 by other means) so that masking placed over the screen of the second tube reduces or eliminates the display over corresponding areas of the screen of the main tube. The mask may vary from opaque to semitransparent to produce complete or partial elimination of the display over different areas as required. A plan printed in thin lines may be mounted over the main tube CRT1 and coded response signals, or similar special signals, superimposed on the plan position display in such a way as to be independent of the intensity control from the cell PC.
GB2069948A 1948-08-05 1948-08-05 Improvements relating to cathode ray tube display apparatus Expired GB644736A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2069948A GB644736A (en) 1948-08-05 1948-08-05 Improvements relating to cathode ray tube display apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2069948A GB644736A (en) 1948-08-05 1948-08-05 Improvements relating to cathode ray tube display apparatus

Publications (1)

Publication Number Publication Date
GB644736A true GB644736A (en) 1950-10-18

Family

ID=10150213

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2069948A Expired GB644736A (en) 1948-08-05 1948-08-05 Improvements relating to cathode ray tube display apparatus

Country Status (1)

Country Link
GB (1) GB644736A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2905938A (en) * 1954-10-13 1959-09-22 Decca Record Co Ltd Moving target radar display apparatus
US3129426A (en) * 1958-01-17 1964-04-14 Electronique Soc Nouv Display-modifying apparatus for radar systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2905938A (en) * 1954-10-13 1959-09-22 Decca Record Co Ltd Moving target radar display apparatus
US3129426A (en) * 1958-01-17 1964-04-14 Electronique Soc Nouv Display-modifying apparatus for radar systems

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