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US3131020A - Method and apparatus for exposing photosensitive material - Google Patents

Method and apparatus for exposing photosensitive material Download PDF

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Publication number
US3131020A
US3131020A US225077A US22507762A US3131020A US 3131020 A US3131020 A US 3131020A US 225077 A US225077 A US 225077A US 22507762 A US22507762 A US 22507762A US 3131020 A US3131020 A US 3131020A
Authority
US
United States
Prior art keywords
spot
face
film
movement
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 - Lifetime
Application number
US225077A
Other languages
English (en)
Inventor
Bertram Sidney
Sidney L Hasin
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.)
Northrop Grumman Space and Mission Systems Corp
Original Assignee
Thompson Ramo Wooldridge 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
Priority to GB1053842D priority Critical patent/GB1053842A/en
Application filed by Thompson Ramo Wooldridge Inc filed Critical Thompson Ramo Wooldridge Inc
Priority to US225077A priority patent/US3131020A/en
Priority to FR947751A priority patent/FR1374575A/fr
Application granted granted Critical
Publication of US3131020A publication Critical patent/US3131020A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/84—Television signal recording using optical recording
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D15/00—Component parts of recorders for measuring arrangements not specially adapted for a specific variable
    • G01D15/14—Optical recording elements; Recording elements using X-or nuclear radiation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K1/00—Methods or arrangements for marking the record carrier in digital fashion
    • G06K1/12—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching
    • G06K1/126—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching by photographic or thermographic registration
    • 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
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/865—Vacuum locks
    • H01J29/866—Devices for introducing a recording support into the vessel
    • 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
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/89—Optical or photographic arrangements structurally combined or co-operating with the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/89—Optical components associated with the vessel
    • H01J2229/8903—Fibre optic components
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/89—Optical components associated with the vessel
    • H01J2229/8926—Active components, e.g. LCD's, indicators, illuminators and moving devices

Definitions

  • This invention relates to a method and apparatus for exposing photosensitive materials and more particularly to'the utilization of cathode ray tube beam writing apparatus and techniques for electronically prescribing and.
  • an ultraviolet sensitive film is ex: posed through an appropriate information bearing mask whereby a beam of light is moved over the film to draw a desired configuration thereon.
  • This type of film may be easily developed with dry processing techniques and therefore is very convenient to use.
  • Such film is of relatively slow speed, is insensitive to ordinary light, and hence may be easily handled.
  • the film requires exposure to high intensity light and the presently known methods of exposure through a mask or by drawing a desired configuration on the film with a beam of'light makes the exposure process relatively slow and not readily adaptable to the processing of high density incoming electronic data.
  • a feature of therpresent invention provides means for sufiiciently exposing the film by means of a cathode ray tube without allowing the electron beam to burn the phosphor on the face of the tube.
  • the invention is based on the recognition that when two objects are moving relative to a third object, the movements of the two objects may be so controlled that the two objects are not moving relative to each other, or may be caused to move relative to each other in a coordinated predetermined manner.
  • the beam of a cathode ray tube is caused to move over the face of the tube.
  • the film to be exposed is positioned in close proximity to the tube face and is moved in synchronism with thefmovement of the beam and by a corresponding amount, thereby insuring 3,131,020 Patented Apr.
  • a conventional cathode ray tube 10 having X and Y deflection plates 12, '14.
  • An electron gun 16 provides an electron beam which impinges on the phosphor-coated face or target 18 of the tube and'causes the phosphor to emit radiation, which may be in the form of ultraviolet light, at the point of impingement.
  • the phosphor 20 is preferably of a very short persistence type, such as thatcommonly known as P16, which is often used in flying spot scanning apparatus. It has a persistence of the order of a microsecond or less and upon excitation emits a radiation rich in ultraviolet wavelength energy.
  • the face preferably contains optical fibers 22 which extend from the inner to the outer surfaces of the face to provide for greater effective resolution for contact exposure.
  • a photosensitive film chip 24 is mounted on a fiat, sintered metal base plate 26 which is located about two mils from the optically ground flat exterior of the fiber optics face 18 of tube 10.
  • This photosensitive film chip maybe of the type that is sensitive to ultravioletlight, for example, and hence may be easily handled because it is insensitive to ordinary light. It thus may be exposed by the ultraviolet radiation from the phosphor of the tube.
  • a vacuum hold-down system 28 secures the film chip 24 to the base plate 26 during the exposure operation andreadily releases the film at the completion ofits 'exposure, such as upon the turning of valve 30, for example, to release the vacuum.
  • the base plate 26 has three precision bearings 32,34, 36, mounted in it,'each of which receives an eccentric element from an associated shaft, only shafts 38 and 40 and eccentric portions 38a and 49d being visible.
  • One of these shafts such as the shaft 38, is rotated by a conventional motor system 42.
  • Shafts 38, 40, and the third shift (not shown) whose ofi-center element fits within bearing 32, are rotatably mounted on a frame 44 which is positioned in front of tube 10.
  • v j v
  • the ofl-center'element'iisa' of shaft 38 fits within bearing 34 and upon'rotation of the shaft'38 movement is imparted to the plate 26 in directions substantially transverse to the tube axis and substantially parallel to the face 18 of the tube.
  • the other two shafts have similaroif-center elements which follow the movement of the plate and stabilize the plate causing it to hold its initial orientation while it translates arounda circle of a diameter determined by the degree of eccentricity of the olfcenter elements from their axes of rotation.
  • the diameter of the circular path followed by a point on the plate may be arbitrary, mils being exemplary, but'in accordance with the present invention preferably exceeds the height of any symbols being written by the beam to insure continuous beam movement over 'the tube face during the exposure time. Since the electron beam in the tube 10 is to follow the movement of the film chip 24 to avoid relative movement therebetween, the speed of rotation of the base must be such as to keep the beam from dwelling in one position on the tube suflicient- 1y long to' burn the phosphor. The speed also must be slow enough to excitethe phosphor properly. A speed of one cycle per second for a 100 mil diameter circle has been found to be adequate for this purpose using one type of film.
  • the movement of base plate 26 may be utilized to control movement of the electron beam of tube 10 so as to be in synchronization therewith.
  • a resolver 46 of conventional design (such as is obtainable from Bendix Corporation or Kearfott Division, General Precision Inc.) is suitably coupled to one of the driven shafts, such as the shaft 40, and provides an indication of the instantaneous position of the plate 26 in its path of motion. This resolver produces voltages proportional to the sine and cosine of the angle of rotation of the shaft 40.
  • the output signals from sine and cosine terminals 48, 50, of the resolver are applied to deflection amplifiers 52, 54 of the cathode ray tube. These amplifiers are of the operational amplifier type that can be used to sum any number of diflerent voltages.
  • the resulting beam pattern will be a circle.
  • the outputs of the deflection amplifiers 52 and 54 are connected to the deflection plates 12 and 14, respectively, of the tube 10 to cause its electron beam to trace a circle on the face of the tube in synchronism with the movement of the plate and film chip. Certain proportionality constants are adjusted, i.e.
  • the information Writing system 56 may include computercontrolled digital registers and a digital-to-analog converter for supplying voltages (gross position voltages) to deflect the electron beam to a desired position for recording information on the film.
  • these positioning voltages have superimposed on them the voltages derived from the resolver 46, as previously explained, to cause the spot to move around a circular path upon the phosphor while at all times remaining stationary with respect to and/or in registration with a desired point on the moving film.
  • the information writing system may also include means for generating symbols, such for example, as a device available commercially from CBS Laboratories, Stanford, Connecticut and known under the trade name Vidiac.
  • This symbol generator provides voltages, which when amplified by the amplifiers 52 and 54, deflect the electron beam to define symbols on the face of the cathode ray tube.
  • the symbol generator also provides intensity control signals, which are amplified by an amplifier 58 and then connected to an intensity grid in the cathode ray tube 10.
  • the film chips After the film chips have been exposed in the manner described, they may be dry processed and be ready for projection within seconds from the time the information is written onto the chips from the electron beam.
  • Apparatus for exposing photosensitive material comprising:'
  • a radiation-emitting spot producing means including a target responsive to a deflectable beam incident upon said target;
  • Apparatus for exposing photosensitive material comprising:
  • a radiation-emitting spot producing means including a target responsive to a defleotable beam incident upon said target;
  • Apparatus for exposing photosensitive material comprising:
  • a cathode ray tube having a face an an electron beam for providing a movable, radiation-emitting spot on said face;
  • Apparatus for exposing photosensitive material comprising:
  • a cathode ray tube having a face and an electron beam for providing a movable, radiation-emitting spot on said face;
  • Apparatus for exposing photosensitive material comprising:
  • a cathode ray tube having a face with a very short persistence phosphor coating and an electron beam for providing a movable, radiation-emitting spot on said face;
  • said last-mentioned means comprising means for moving said material
  • Apparatus for exposing photosensitive material comprising:
  • holding means for holding the material to be exposed
  • a cathode ray tube having an axis, a face and an electron beam for providing a radiation-emitting spot on said face;
  • an information writing system for providing signals for causing deflection of the electron beam and movement of the spot in a preselected manner
  • position sensitive means for converting the movement of said holding means into signals indicative of the position of the holding means
  • Apparatus for exposing photosensitive material comprising:
  • said last-mentioned means comprising:
  • Appanatus for exposing photosensitive material comprising:
  • a cathode ray tube having a phsophor-coated face and an electron beam for providing a movable, radiationemitting spot on said face;
  • said last-mentioned means comprising:
  • means for moving said spot on said face to prevent burning said phosphor and including means for moving said material to cause a point on said material to move in a circle lying on a plane substantially parallel to said face;

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Electron Beam Exposure (AREA)
  • Projection-Type Copiers In General (AREA)
US225077A 1962-09-20 1962-09-20 Method and apparatus for exposing photosensitive material Expired - Lifetime US3131020A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB1053842D GB1053842A (sv) 1962-09-20
US225077A US3131020A (en) 1962-09-20 1962-09-20 Method and apparatus for exposing photosensitive material
FR947751A FR1374575A (fr) 1962-09-20 1963-09-17 Procédé et dispositif à impressionner les matières photosensibles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US225077A US3131020A (en) 1962-09-20 1962-09-20 Method and apparatus for exposing photosensitive material

Publications (1)

Publication Number Publication Date
US3131020A true US3131020A (en) 1964-04-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
US225077A Expired - Lifetime US3131020A (en) 1962-09-20 1962-09-20 Method and apparatus for exposing photosensitive material

Country Status (2)

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US (1) US3131020A (sv)
GB (1) GB1053842A (sv)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3359563A (en) * 1965-07-22 1967-12-19 Westinghouse Electric Corp Electron beam thermal imaging display system
FR2480976A1 (fr) * 1980-04-21 1981-10-23 Itek Corp Procede et appareil pour prolonger la vie d'un tube a rayons cathodiques
WO1986002754A1 (en) * 1984-10-29 1986-05-09 Excellon Industries Method and apparatus for pattern forming
EP0516104A2 (en) * 1991-05-29 1992-12-02 Inax Corporation Mark printing apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2015570A (en) * 1930-11-19 1935-09-24 Gen Electric Cathode ray photographic apparatus
US2632864A (en) * 1952-06-25 1953-03-24 Rca Corp Television system
US2881248A (en) * 1956-05-09 1959-04-07 Wbal Division The Hearst Corp Camera tube burn-in prevention

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2015570A (en) * 1930-11-19 1935-09-24 Gen Electric Cathode ray photographic apparatus
US2632864A (en) * 1952-06-25 1953-03-24 Rca Corp Television system
US2881248A (en) * 1956-05-09 1959-04-07 Wbal Division The Hearst Corp Camera tube burn-in prevention

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3359563A (en) * 1965-07-22 1967-12-19 Westinghouse Electric Corp Electron beam thermal imaging display system
FR2480976A1 (fr) * 1980-04-21 1981-10-23 Itek Corp Procede et appareil pour prolonger la vie d'un tube a rayons cathodiques
WO1986002754A1 (en) * 1984-10-29 1986-05-09 Excellon Industries Method and apparatus for pattern forming
US4628466A (en) * 1984-10-29 1986-12-09 Excellon Industries Method and apparatus for pattern forming
EP0516104A2 (en) * 1991-05-29 1992-12-02 Inax Corporation Mark printing apparatus
EP0516104A3 (en) * 1991-05-29 1993-08-04 Inax Corporation Mark printing apparatus

Also Published As

Publication number Publication date
GB1053842A (sv)

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