US2442961A - Electron sensitive color photographic plate - Google Patents

Electron sensitive color photographic plate Download PDF

Info

Publication number
US2442961A
US2442961A US642949A US64294946A US2442961A US 2442961 A US2442961 A US 2442961A US 642949 A US642949 A US 642949A US 64294946 A US64294946 A US 64294946A US 2442961 A US2442961 A US 2442961A
Authority
US
United States
Prior art keywords
electron
color
mosaics
electrons
plate
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
US642949A
Inventor
Edward G Ramberg
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.)
RCA Corp
Original Assignee
RCA Corp
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 RCA Corp filed Critical RCA Corp
Priority to US642949A priority Critical patent/US2442961A/en
Application granted granted Critical
Publication of US2442961A publication Critical patent/US2442961A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/02—Details
    • H01J37/22—Optical, image processing or photographic arrangements associated with the tube
    • H01J37/224—Luminescent screens or photographic plates for imaging; Apparatus specially adapted therefor, e. g. cameras, TV-cameras, photographic equipment or exposure control; Optical subsystems specially adapted therefor, e. g. microscopes for observing image on luminescent screen
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • 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
    • H01J29/30—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines
    • H01J29/32—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television

Definitions

  • This invention relates generally to electron photography and more particularly to electron color photographic plates responsive to variations in the velocity of electrons impinging thereon.
  • the instant invention contemplates the use of a color photographic plate capable of recording diierences in the velocity of electrons impinging thereon in terms of the color or'colors oi the developed and fixed plate when viewed by light transmission.
  • the color plates according to the invention essentially are similar to the Paget color process plates comprising a plurality of mosaics having diierent photographic color properties such, for example, as complementary ne checkerboard patterns of alternate red and green dye patches covering a supporting plate.
  • the essential difference between conventional color process plates and the photographic color plate of the instant invention is that a thin, uniform-thickness, metallic iilm is deposited over all of the rectangular dye patches of one of the color mosaics. and then the second color mosaic is deposited over the thinpmetallic iilm. l
  • the outer color nlm will provide maximum 'sensitivity for 50 kilovolt electrons while the inner color lm will have maximum sensitivity to kilovolt electrons.
  • portions of the photographic plate exposed to 50 kilovolt electrons will be blackened most at the squares of the mosaic comprising the outer color nlm. Similarly portions of the plate exposed to 70 kilovolt electrons will be blackened most at the complementary squares of the mosaic comprising the inner photographic lilm.
  • the photog.aphic ⁇ plate thus will provide distinguishing color characteristics depending upon the velocities of the electrons which impinged upon the plate.
  • Another object is to provide an improved method of and means for measuring electron velocities. Another object is to provide an improved method of and means for recording diierences in electron velocity. An additional object is to provide an improved method of and means for producing a color record of differences in the velocity of electrons impinging upon a color plate. A further object is to provide an improved color plate for electronoptical photography for indicating diierences in the velocity of electrons exposing said plate. A still further object of the invention is to provide an improved color plate for electron optical photography comprising complementary mosaics of electron sensitivematerials having diierent elec-4 tron-velocity sensitive characteristics, or providing distinguishing color characteristics for different impinging electron velocities. Another object is to provide an improved method of and means for indicating photographically the composition of microspecimens in an electron microscope -or other electron optical device.
  • Figure 1 is a plan view of a color plate in accordance with the invention
  • Figure 2 is a side elevational schematic view of the basic combination of such a color plate with an irradiating electron source
  • Figure 3 is a family of graphs illustrating 4the electron velocity-sensitive characteristics of a typical pair of electron sensitive films according to the invention. Simi-- lar reference characters are applied to similar elements throughout the drawing.
  • the electron-sensitive color plate according to the invention includes'for example, a glass support I upon which is deposited a large number of rectangular red dye patches forming a red screen 3 and arranged in a checkerboard pattern as shown in Figure 1.
  • a thin metallic lm 5 such as magnesium, which reduces the velocity of '70 kilovolt electrons to an eilective velocity of 50 kilovolts.
  • a second electron-sensitive color screen 1 is deposited in a similar line checkerboard pattern of alternate green dye patches l wherein the green patches coincide with the spaces between the red dye patches 3 of the red screen 3.
  • any other combination of electron-sensitive color screens may be employed and that the arrangement and orientation thereof may be varied in any desired manner.
  • the screens may comprise circular, hexagonal, or other shaped dye patches alternately or randomly arranged, or they may comprise alternately spaced color lines of any desired color arrangement.
  • more than two such screens may be superposed, and the metallic film 5 may or may not be interposed between each of the screens.
  • the screens and the metallic lm may be applied in any known manner such as by evaporation, electrodeposition or by conventional coating processes, including or excluding the use of masking screens.
  • red and green checkerboard electron-sensitive color screens separated by a thin magnesium deposit are employed as shown in the drawing.
  • the color screens 3 and 1 have maximum electron photosensitivity for electron velocities of 50 klovolts.
  • the thickness of the metallic deposit 5 is selected to require an electron velocity of 20 kilovolts for penetration thereof.
  • the electron decelerating deposit 5 should be substantially transparent; to light transmission. However. if desired, lt may be dissolved away during development of the color screens.
  • the portions of the color plate bombarded by 50 kilovolt electrons derived from an electron source 9 will be blackened most (after development and fixing), at the green squares 'I' on the green color screen 1.
  • electrons having a velocity of 70 kilovolts will provide maximum blackening of the red color patches 3' of the red screen 3, since such'70 kilovolt electrons will be decelerated by 20 kilovolts ⁇ in passing through the metallic deposit 5 between the color screens.
  • the blackening of the red dye patches by 50 kilovolt electrons therefore will provide an apparent increase in the green transmission of the color plate when viewed by light transmission.
  • the blackening of the green dye patches by 70 kilovolt electrons Will apparently increase the red light transmission of the color plate.
  • the color screen For a certain electron velocity between 50 and '70 kilovolts, the color screen passes from a greenish to a reddish coloration when viewed by light transmission. For electron velocities below 50 kilovolts, the color screen will have more pronounced red transmission, while for electron velocities above 70 kilovolts the screen will appear to have somewhat less pronounced green light transmission characteristics. As explained heretofore other dye patch arrangements or combinations will provide different color properties in response to different bombarding electron velocities.
  • the color screen thus described may be employed for velocity analysis of an electron image as in an electron microscope, (not shown), wherein substantially constant velocity electrons irradiate a microspecimen, and the variations in velocity of electrons transmitted by the specimen may be employed to determine the molecular composition or the thickness of the various portions of the imaged specimen.
  • Color plates of the type described also may be employed for any other purpose wherein measurements of electron velocity are desired over predetermined velocity ranges.
  • the exposed color screen may be observed by light transmission in any desired manner.
  • the outer color screen 1 provides appreciable electron deceleration through the portions of the screen between the dye patches, the metallic deposit 5 may be omitted since the additional deceleration provided thereby may not be required.
  • Various combinations of color screens and decelerating films or deposits may be employed to provide additional color differentiation for indicating more extended electron velocity ranges.
  • a photosensitive plate for electron-optical photography comprising a pair of complementary mosaics of electron photosensitive materials having dierent electron-velocity photosensitivity characteristics and disposed in parallel complementary relation, whereby contrasting exposure of said mosaics is provided by irradiating electrons of predetermined different velocities.
  • a photosensitive plate for electron-optical photography comprising a pair of complementary mosaics of electron photosensitive ymaterials having diierent electron-photosensitivity characteristics and disposed in parallel complementary relation, and an electron decelerating element disposed between said mosaics whereby contrasting exposure of said mosaics is provided by irradiating electrons of predetermined different velocities.
  • a photosensitive plate for electron-optical photography comprising a pair of complementary mosaics of electron photosensitive materials having different electron-photosensitivity color characteristics and disposed in complementary interleaved relation, and an electron decelerating element disposed between said mosaics whereby contrasting exposure of said mosaics is provided by irradiating electrons of predetermined diiferent velocities.
  • a photosensitive plate for electron-optical photography comprising a pair of complementary mosaics of electron photosensitive materials having different electronphotosensitivity characteristics and disposed in parallel complementary relation, and an electron decelerating element disposed between said mosaics whereby contrasting exposure oi said mosaics is provided by irradiating electrons of predetermined dverent velocities, the method comprising irradiating said mosaics simultaneously by electrons of predetermined different velocities to provide contrasting exposures of said mosaics as a function of said irradiating electron velocities, and developing said exposed mosaics to pro-- vide color contrast therein.
  • a photosensitive plate for electron-optical photography comprising a pair of complementary mosaics of electron photosensitive materials having dierent electron-photosensitivity colo'r characteristics and disposed in parallel complementary relation, and an electron decelrating element disposed between said mosaics, and means for' irradiating said mosaics simultaneously by electrons of predetermined dierent velocities to provide contrasting color exposure of said mosaics.
  • a photosensitive plate for electron-optical photography comprising a pair of mosaics oi electron photosensitive materials having diierent ⁇ electron-photosensitivity color 4 characteristics. and disposed in parallel complementary registry, and an electron decelerating element disposed. between said mosaics, and
  • a photosensitive plate for electron-optical photography comprising a pair of checkerboard mosaics of electron photosensitive materials having different electron-photosensitivity color characteristics and disposed in parallel complementary registry, and an electron decelerating element disposed between said mosaics, and means for irradiating said mosaics simultaneously by electrons of predetermined diierent velocities to provide contrasting color exposure of said mosaics.
  • a photosensitive plate for electron-optical photography comprising a pair of complementary mosaics of electron photosensitive materials having different electron-photosensitivity characteristics and disposed in parallel complementary relation, and a substantially optically transparent electror decelerating element disposed between said mosaics whereby contrasting exposure of said mosaics is provided by irradiating electrons of predetermined different velocities.
  • a photosensitive plate for electron-optical photography comprising a pair of complementary mosaics of electron photosensitive materials having different electron-photosensitivity characteristics and disposed in paralle1 complementary relation, and a thin metallic electron decelerating element disposed between said mosaics whereby contrasting exposure of said mosaics is provided by irradiating electrons of predetermined diierent velocities.
  • a photosensitive plate for electron-optical photography comprising a pair of complementary mosaics o1'electron photosensitive materials having different electron-photosensitivity characteristics and disposed in parallel complementary relation, and a thin magnesium illm comprising an electron decelerating element disposed between said mosaics whereby contrasting exposure of said mosaics is provided by irradiating electrons of predetermined diierent velocities.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Description

June 1948. E. G. RAMBERG 2,442,961
ELECTRON SENSITIVE COLOR PHOTOGRAPHIC PLATE Filed Jan. 23, 1946 ATTORNEY Patented June 8, 1948 ELECTRON SENSITIVE COLOR PHOTO- GRAPHIC PLATE Edward G. Bamberg, Feasterville, Pa., assignor to Radio Corporation of America, a corporation of Delaware Application January 23, 1946, Serial No. 642,949
(Ci. 25o-65) 12 Claims. 1
This invention relates generally to electron photography and more particularly to electron color photographic plates responsive to variations in the velocity of electrons impinging thereon.
Frequently it is desirable to record differences in the velocity of electrons impinging upon the photographic plate employed in electron optical systems such, for example. as an electron microscope. When constant velocity electrons are applied to irradiate a microspecimen in an electron microscope, variation in the velocity of electrons derived from the specimen may be interpreted in terms vof the materials comprising the specimen or of variations in the thickness of the specimen. The instant invention contemplates the use of a color photographic plate capable of recording diierences in the velocity of electrons impinging thereon in terms of the color or'colors oi the developed and fixed plate when viewed by light transmission.
The color plates according to the invention essentially are similar to the Paget color process plates comprising a plurality of mosaics having diierent photographic color properties such, for example, as complementary ne checkerboard patterns of alternate red and green dye patches covering a supporting plate. The essential difference between conventional color process plates and the photographic color plate of the instant invention is that a thin, uniform-thickness, metallic iilm is deposited over all of the rectangular dye patches of one of the color mosaics. and then the second color mosaic is deposited over the thinpmetallic iilm. l
In the U. S. Patent 2,372,170 granted to Rich ard F. Baker on March 27, 1945, it is shown that various photographic materials have maximum sensitivity to irradiating electrons of a predetermined electron velocity. Electron velocities greater or less than the optimum value provide reduced exposure of the photographic film. This principle is utilized in the instant invention by selecting electron velocities in the minimum range which will provide emcient exposure of the outer color iilm, and thence selecting the character and thickness oi the metallic iilm between the color nlms to provide the desired optimum electron velocity difference for exposure of the second color photographic iilm under the metallic nlm. Thus if both photographic lms have maximum electron sensitivity at 50 kilovolt electron velocity. and the thickness of the metallic deposit is suflicient to reduce the velocity of 70 kilovolt electrons to an eilective value of 50 kilovolts, then the outer color nlm will provide maximum 'sensitivity for 50 kilovolt electrons while the inner color lm will have maximum sensitivity to kilovolt electrons.
Portions of the photographic plate exposed to 50 kilovolt electrons will be blackened most at the squares of the mosaic comprising the outer color nlm. Similarly portions of the plate exposed to 70 kilovolt electrons will be blackened most at the complementary squares of the mosaic comprising the inner photographic lilm. When viewed by lightl transmission, the photog.aphic\ plate thus will provide distinguishing color characteristics depending upon the velocities of the electrons which impinged upon the plate.
Among the objects of the invention are to provide an improved method of and means for measuring electron velocities. Another object is to provide an improved method of and means for recording diierences in electron velocity. An additional object is to provide an improved method of and means for producing a color record of differences in the velocity of electrons impinging upon a color plate. A further object is to provide an improved color plate for electronoptical photography for indicating diierences in the velocity of electrons exposing said plate. A still further object of the invention is to provide an improved color plate for electron optical photography comprising complementary mosaics of electron sensitivematerials having diierent elec-4 tron-velocity sensitive characteristics, or providing distinguishing color characteristics for different impinging electron velocities. Another object is to provide an improved method of and means for indicating photographically the composition of microspecimens in an electron microscope -or other electron optical device.
The invention will be described in further detail by reference to the accompanying drawing of which Figure 1 is a plan view of a color plate in accordance with the invention, Figure 2 is a side elevational schematic view of the basic combination of such a color plate with an irradiating electron source, and Figure 3 is a family of graphs illustrating 4the electron velocity-sensitive characteristics of a typical pair of electron sensitive films according to the invention. Simi-- lar reference characters are applied to similar elements throughout the drawing.
Referring to Figuresl and 2 of the drawing, the electron-sensitive color plate according to the invention includes'for example, a glass support I upon which is deposited a large number of rectangular red dye patches forming a red screen 3 and arranged in a checkerboard pattern as shown in Figure 1. Over the layer of red dye patches 3' is deposited a thin metallic lm 5, such as magnesium, which reduces the velocity of '70 kilovolt electrons to an eilective velocity of 50 kilovolts. Over the metallic lm 5, a second electron-sensitive color screen 1 is deposited in a similar line checkerboard pattern of alternate green dye patches l wherein the green patches coincide with the spaces between the red dye patches 3 of the red screen 3.
It should be understood that any other combination of electron-sensitive color screens may be employed and that the arrangement and orientation thereof may be varied in any desired manner. For example, instead of rectangular checkerboard patterns, the screens may comprise circular, hexagonal, or other shaped dye patches alternately or randomly arranged, or they may comprise alternately spaced color lines of any desired color arrangement. Furthermore more than two such screens may be superposed, and the metallic film 5 may or may not be interposed between each of the screens. Also the screens and the metallic lm may be applied in any known manner such as by evaporation, electrodeposition or by conventional coating processes, including or excluding the use of masking screens.
In a typical example, red and green checkerboard electron-sensitive color screens separated by a thin magnesium deposit are employed as shown in the drawing. The color screens 3 and 1 have maximum electron photosensitivity for electron velocities of 50 klovolts. The thickness of the metallic deposit 5 is selected to require an electron velocity of 20 kilovolts for penetration thereof. Preferably, the electron decelerating deposit 5 should be substantially transparent; to light transmission. However. if desired, lt may be dissolved away during development of the color screens.
The portions of the color plate bombarded by 50 kilovolt electrons derived from an electron source 9 will be blackened most (after development and fixing), at the green squares 'I' on the green color screen 1. Similarly, electrons having a velocity of 70 kilovolts will provide maximum blackening of the red color patches 3' of the red screen 3, since such'70 kilovolt electrons will be decelerated by 20 kilovolts` in passing through the metallic deposit 5 between the color screens, The blackening of the red dye patches by 50 kilovolt electrons therefore will provide an apparent increase in the green transmission of the color plate when viewed by light transmission. Similarly the blackening of the green dye patches by 70 kilovolt electrons Will apparently increase the red light transmission of the color plate.
For a certain electron velocity between 50 and '70 kilovolts, the color screen passes from a greenish to a reddish coloration when viewed by light transmission. For electron velocities below 50 kilovolts, the color screen will have more pronounced red transmission, while for electron velocities above 70 kilovolts the screen will appear to have somewhat less pronounced green light transmission characteristics. As explained heretofore other dye patch arrangements or combinations will provide different color properties in response to different bombarding electron velocities.
In Figure 3 the electron photosensitivity of the green and red screens 'I and 3, respectively, is illustrated in the graphs I1 and I3.
The color screen thus described may be employed for velocity analysis of an electron image as in an electron microscope, (not shown), wherein substantially constant velocity electrons irradiate a microspecimen, and the variations in velocity of electrons transmitted by the specimen may be employed to determine the molecular composition or the thickness of the various portions of the imaged specimen. Color plates of the type described also may be employed for any other purpose wherein measurements of electron velocity are desired over predetermined velocity ranges. The exposed color screen may be observed by light transmission in any desired manner.
It should .be understood that if the outer color screen 1 provides appreciable electron deceleration through the portions of the screen between the dye patches, the metallic deposit 5 may be omitted since the additional deceleration provided thereby may not be required. Various combinations of color screens and decelerating films or deposits may be employed to provide additional color differentiation for indicating more extended electron velocity ranges.
I claim as my invention:
1. A photosensitive plate for electron-optical photography comprising a pair of complementary mosaics of electron photosensitive materials having dierent electron-velocity photosensitivity characteristics and disposed in parallel complementary relation, whereby contrasting exposure of said mosaics is provided by irradiating electrons of predetermined different velocities.
2. A photosensitive plate for electron-optical photography comprising a pair of complementary mosaics of electron photosensitive ymaterials having diierent electron-photosensitivity characteristics and disposed in parallel complementary relation, and an electron decelerating element disposed between said mosaics whereby contrasting exposure of said mosaics is provided by irradiating electrons of predetermined different velocities.
3. A photosensitive plate for electron-optical photography comprising a pair of complementary mosaics of electron photosensitive materials having different electron-photosensitivity color characteristics and disposed in complementary interleaved relation, and an electron decelerating element disposed between said mosaics whereby contrasting exposure of said mosaics is provided by irradiating electrons of predetermined diiferent velocities.
4. In a system utilizing a photosensitive plate for electron-optical photography comprising a pair of complementary mosaics of electron photosensitive materials having different electronphotosensitivity characteristics and disposed in parallel complementary relation, and an electron decelerating element disposed between said mosaics whereby contrasting exposure oi said mosaics is provided by irradiating electrons of predetermined diilerent velocities, the method comprising irradiating said mosaics simultaneously by electrons of predetermined different velocities to provide contrasting exposures of said mosaics as a function of said irradiating electron velocities, and developing said exposed mosaics to pro-- vide color contrast therein.
5. The method according to claim 4 including the step of removing said decelerating element subsequent to electron exposure oi' said mosaics.l
removing at least portions of said deposited element subsequent4 to electron exposure of said mosaics.
7. In combination, a photosensitive plate for electron-optical photography comprising a pair of complementary mosaics of electron photosensitive materials having dierent electron-photosensitivity colo'r characteristics and disposed in parallel complementary relation, and an electron decelrating element disposed between said mosaics, and means for' irradiating said mosaics simultaneously by electrons of predetermined dierent velocities to provide contrasting color exposure of said mosaics.
8. Inl combination, a photosensitive plate for electron-optical photography comprising a pair of mosaics oi electron photosensitive materials having diierent `electron-photosensitivity color 4 characteristics. and disposed in parallel complementary registry, and an electron decelerating element disposed. between said mosaics, and
means for irradiating said mosaics simultaneously by electrons of predetermined ditl'erent velocities to provide contrasting color exposure of said mosaics.
9. In combination, a photosensitive plate for electron-optical photography comprising a pair of checkerboard mosaics of electron photosensitive materials having different electron-photosensitivity color characteristics and disposed in parallel complementary registry, and an electron decelerating element disposed between said mosaics, and means for irradiating said mosaics simultaneously by electrons of predetermined diierent velocities to provide contrasting color exposure of said mosaics.
10. A photosensitive plate for electron-optical photography comprising a pair of complementary mosaics of electron photosensitive materials having different electron-photosensitivity characteristics and disposed in parallel complementary relation, and a substantially optically transparent electror decelerating element disposed between said mosaics whereby contrasting exposure of said mosaics is provided by irradiating electrons of predetermined different velocities.
11. A photosensitive plate for electron-optical photography comprising a pair of complementary mosaics of electron photosensitive materials having different electron-photosensitivity characteristics and disposed in paralle1 complementary relation, and a thin metallic electron decelerating element disposed between said mosaics whereby contrasting exposure of said mosaics is provided by irradiating electrons of predetermined diierent velocities.
12. A photosensitive plate for electron-optical photography comprising a pair of complementary mosaics o1'electron photosensitive materials having different electron-photosensitivity characteristics and disposed in parallel complementary relation, and a thin magnesium illm comprising an electron decelerating element disposed between said mosaics whereby contrasting exposure of said mosaics is provided by irradiating electrons of predetermined diierent velocities.
EDWARD G. BAMBERG.
US642949A 1946-01-23 1946-01-23 Electron sensitive color photographic plate Expired - Lifetime US2442961A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US642949A US2442961A (en) 1946-01-23 1946-01-23 Electron sensitive color photographic plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US642949A US2442961A (en) 1946-01-23 1946-01-23 Electron sensitive color photographic plate

Publications (1)

Publication Number Publication Date
US2442961A true US2442961A (en) 1948-06-08

Family

ID=24578717

Family Applications (1)

Application Number Title Priority Date Filing Date
US642949A Expired - Lifetime US2442961A (en) 1946-01-23 1946-01-23 Electron sensitive color photographic plate

Country Status (1)

Country Link
US (1) US2442961A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2543477A (en) * 1948-07-29 1951-02-27 Rca Corp Kinescope for the reproduction of color images
US2687360A (en) * 1951-01-18 1954-08-24 Rauland Corp Process for making a multicolor fluorescent screen
US2704783A (en) * 1948-08-14 1955-03-22 Rca Corp Color television receiving system
US2714688A (en) * 1952-10-31 1955-08-02 Rauland Corp Image-reproducing device
US2728011A (en) * 1952-05-01 1955-12-20 Rca Corp Color television picture and pick-up tubes
US2728010A (en) * 1951-01-30 1955-12-20 Rca Corp Color kinescope utilizing x-rays
US2755401A (en) * 1951-11-16 1956-07-17 Rca Corp Color television pickup tubes
US2795730A (en) * 1951-11-07 1957-06-11 Westinghouse Electric Corp Tricolor television picture tube
US2807725A (en) * 1954-01-27 1957-09-24 Gerard Lemeac Vigneau Color radiography process
US2943232A (en) * 1959-02-16 1960-06-28 Gen Electric Color cathode ray image display system
US3067349A (en) * 1959-08-06 1962-12-04 Paramount Pictures Corp Method for producing registered color screen cathode-ray tubes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2543477A (en) * 1948-07-29 1951-02-27 Rca Corp Kinescope for the reproduction of color images
US2704783A (en) * 1948-08-14 1955-03-22 Rca Corp Color television receiving system
US2687360A (en) * 1951-01-18 1954-08-24 Rauland Corp Process for making a multicolor fluorescent screen
US2728010A (en) * 1951-01-30 1955-12-20 Rca Corp Color kinescope utilizing x-rays
US2795730A (en) * 1951-11-07 1957-06-11 Westinghouse Electric Corp Tricolor television picture tube
US2755401A (en) * 1951-11-16 1956-07-17 Rca Corp Color television pickup tubes
US2728011A (en) * 1952-05-01 1955-12-20 Rca Corp Color television picture and pick-up tubes
US2714688A (en) * 1952-10-31 1955-08-02 Rauland Corp Image-reproducing device
US2807725A (en) * 1954-01-27 1957-09-24 Gerard Lemeac Vigneau Color radiography process
US2943232A (en) * 1959-02-16 1960-06-28 Gen Electric Color cathode ray image display system
US3067349A (en) * 1959-08-06 1962-12-04 Paramount Pictures Corp Method for producing registered color screen cathode-ray tubes

Similar Documents

Publication Publication Date Title
US2442961A (en) Electron sensitive color photographic plate
US2304988A (en) Photomechanical reproduction
US3528737A (en) Light diffusing ring for direct exposure of photosensitive material
US2316643A (en) Photomechanical process
US2691585A (en) Prescreened posterizing photographic film
US2748288A (en) Electron photography plate construction
US3592112A (en) Photographic printing of cathode-ray tube screen structure
US2701196A (en) Photomechanical correction of photographic images
US2870010A (en) Method of manufacturing electrical apparatus
US4227115A (en) Color display tube with shadow mask having elongated apertures therein
US3563737A (en) Method of manufacturing a plurality of relatively matched masks used in the production of phosphor screens
US3623794A (en) Spectral zonal encoder
US2183204A (en) Electro-optical system
US2703281A (en) Auxiliary screening apparatus and method for multicolor photogravure
US4001018A (en) Method for making a stripe screen on a face plate of a cathode ray tube by rotating correction lens
US2691580A (en) Increasing contrast of halftone reproductions
US1896567A (en) Screen for photographic purposes, photomechanical printing processes and the like
US3727233A (en) Method of recording an electronic image
US4039838A (en) High resolution fluorescent screen and methods of making and using the same
US2386074A (en) Color television
US3698903A (en) Method of making a graded photo-printing master
US2997392A (en) Method of gravure reproduction
US5762528A (en) Alignment measurement apparatus and method for using the same in forming phosphor screen in color cathode-ray tube
US1878857A (en) Coloe filtee
GB2092330A (en) Improvements in and relating to colour photography