GB995286A - Improvements in or relating to high-intensity light sources - Google Patents

Improvements in or relating to high-intensity light sources

Info

Publication number
GB995286A
GB995286A GB28000/62A GB2800062A GB995286A GB 995286 A GB995286 A GB 995286A GB 28000/62 A GB28000/62 A GB 28000/62A GB 2800062 A GB2800062 A GB 2800062A GB 995286 A GB995286 A GB 995286A
Authority
GB
United Kingdom
Prior art keywords
cathode
grid
screen
phosphor
nanoseconds
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
GB28000/62A
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.)
Litton Industries Inc
Original Assignee
Litton Industries Inc
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 Litton Industries Inc filed Critical Litton Industries Inc
Publication of GB995286A publication Critical patent/GB995286A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/30—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp
    • H05B41/32—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp for single flash operation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
    • G01P3/68—Devices characterised by the determination of the time taken to traverse a fixed distance using optical means, i.e. using infrared, visible, or ultraviolet light
    • G01P3/685—Devices characterised by the determination of the time taken to traverse a fixed distance using optical means, i.e. using infrared, visible, or ultraviolet light for projectile velocity measurements
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
    • G03B27/725—Optical projection devices wherein the contrast is controlled electrically (e.g. cathode ray tube masking)
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F10/00—Apparatus for measuring unknown time intervals by electric means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J63/00—Cathode-ray or electron-stream lamps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0031—Tubes with material luminescing under electron bombardment

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

995,286. Cathode-ray tubes. LITTON INDUSTRIES Inc. July 20, 1962 [July 31, 1961], No. 28000/62. Heading H1D. A light source comprises a cathode-ray tube having a screen 16 coated with a phosphor 24 of short persistency, a cathode 18 with emissive area of the same order of magnitude as the screen area, and a grid 20 for controlling the electron emission from the cathode to the screen. The grid is normally biased negative, while a continuous electron-accelerating potential is applied between cathode and screen, short positive pulses being applied to the grid to produce high-intensity light flashes. As shown, the cathode is of the Pierce type, buts may be of part-cylindrical or elongated form, and may be of 5 inch diameter providing pulses of up to 2,000 amperes of current. An axial magnetic focusing field may be provided. The cathode and heater 42 are supported from metal housing 14, while concave grid 20 is mounted on metal rings 28, 30, 32 with a cold cathodegrid spacing of 120 mils. Adjacent parts of grid 20, anode 22 and mounting ring 32 are formed with rounded edges to prevent arcing. The anode 22 is connected to the aluminized phosphor screen and to an accelerating voltage of about 60 KV. Positive pulses of 5 to 10 KV. and 10 to 20 nanoseconds length are applied to the grid, which is normally biased negative, to provide light pluses of about 40 nanoseconds length, the phosphor brighteners decaying to one half in 20 nanoseconds. The phosphor screen may be cooled by forced air currents. An arrangement for high-speed photography of a projectile is described.
GB28000/62A 1961-07-31 1962-07-20 Improvements in or relating to high-intensity light sources Expired GB995286A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US127984A US3189784A (en) 1961-07-31 1961-07-31 Very high intensity light source using a cathode ray tube

Publications (1)

Publication Number Publication Date
GB995286A true GB995286A (en) 1965-06-16

Family

ID=22432998

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28000/62A Expired GB995286A (en) 1961-07-31 1962-07-20 Improvements in or relating to high-intensity light sources

Country Status (3)

Country Link
US (1) US3189784A (en)
DE (1) DE1489368B2 (en)
GB (1) GB995286A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4344017A (en) * 1979-05-08 1982-08-10 Mitsubishi Denki Kabushiki Kaisha Cathode ray tube used as light source

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2133138A (en) * 1935-05-24 1938-10-11 Gen Electric Stroboscope
US2698914A (en) * 1950-08-28 1955-01-04 Gilfillan Bros Inc Fast time constant circuit with clipping diode
US2898492A (en) * 1955-12-13 1959-08-04 Gen Electric Apparatus for and method of cooling beam transmitting windows
US2986668A (en) * 1957-12-23 1961-05-30 Gen Dynamics Corp Cathode ray tube optical system
US2992347A (en) * 1959-11-03 1961-07-11 Gen Electric Oscillation suppressor for electron guns

Also Published As

Publication number Publication date
US3189784A (en) 1965-06-15
DE1489368A1 (en) 1969-04-03
DE1489368B2 (en) 1970-11-05

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