← Back to Patent Explorer
US3684824A Expired / Lapsed US ⏱️ 0.0 years remaining

Multispected imaging system

Assignee: TDK Micronas GmbH
•
Filing: 1970-03-16
•
Granted: 1972-08-15
•
Expires: 1990-03-16
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A multispectral imaging system is positioned for movement relative to a scene to provide images of the scene in multispectrum. The system includes a plurality of filter strips for passing different spectral bands, such as different colors, to provide a plurality of radiation images of the field of view being scanned. The strips are positioned with respect to an image dissector tube so that the radiation images of the view are converted into electron images. The tube includes a photoemissive cathode at one end that converts the plurality of radiation images into corresponding electron images and an apertured electrode located at the other end. The system also includes means for scanning the electron images transversely across the apertured electrode, an electron multiplier or amplifying the scanned electron images, and means utilizing the scanned and amplified electron images. As the system traverses a path relative to the field of view, each of the filters scans a section of the field of view along the direction of the movement. Knowing the transverse scanning speed of the electron beam and the relative speed of motion of the system along the path, the signal information from the electron images can readily by demultiplexed to display visual images of the field of view in color on a display screen. The tube may include only one aperture and the electron beam scanning means may be adapted so that the plurality of electron images scans the aperture in sequence in a multiplex fashion, or there may be a corresponding plurality of apertures, each simultaneously being scanned by one electron image from a respective filter strip and photocathode portion.

Inventors

  • 👤 Edward W Koenig

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 06:39
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H01J31/56; H01J31/26; H01J31/46

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 258 words
An imaging system for scanning a field of view comprising: an image dissector tube positioned for longitudinal movement relative to said field of view and to receive a radiation image of said field of view, said image tube having a radiation responsive electron emissive cathode at one end thereof and an apertured electrode at the other end, said electrode having only three apertures therein; filtering means fixedly coupled to said cathode, said filtering means including only three differently colored filter strips positioned parallel to each other and to a plurality of parallel sections of said field of view, said strips being positioned transversely relative to the direction of movement along said field of view such that each filter strip views a corresponding section of said field of view, said movement of said tube causing each said filter strip to scan each said section successively in the direction of movement to provide a plurality of radiation images of each said section in successive order; said cathode converting said plurality of radiation images into a corresponding plurality of successive electron images; means for focusing said plurality of electron images onto said apertured electrode, and transverse scanning means for simultaneously scanning said plurality of successive electron images across said apertured electrode transversely to said direction of movement to provide a plurality of output signals, each aperture being aligned with a respective strip and being scanned by an electron image from only one and the same said respective strip during each successive scan; and means for utilizing said plurality of output signals.
Claim 2
Dependent Claim 258 words
An imaging system for scanning a field of view comprising: an image dissector tube positioned for longitudinal movement relative to said field of view and to receive a radiation image of said field of view, said image tube having a radiation responsive electron emissive cathode at one end thereof and an apertured electrode at the other end, said electrode having only three apertures therein; filtering means fixedly coupled to said cathode, said filtering means including only three differently colored filter strips positioned parallel to each other and to a plurality of parallel sections of said field of view, said strips being positioned transversely relative to the direction of movement along said field of view such that each filter strip views a corresponding section of said field of view, said movement of said tube causing each said filter strip to scan each said section successively in the direction of movement to provide a plurality of radiation images of each said section in successive order; said cathode converting said plurality of radiation images into a corresponding plurality of successive electron images; means for focusing said plurality of electron images onto said apertured electrode, and transverse scanning means for simultaneously scanning said plurality of successive electron images across said apertured electrode transversely to said direction of movement to provide a plurality of output signals, each aperture being aligned with a respective strip and being scanned by an electron image from only one and the same said respective strip during each successive scan; and means for utilizing said plurality of output signals.
Claim 3
Dependent Claim 36 words
An imaging system in accordance with claim 1, further comprising lens means to focus the radiation image of said field of view onto said filtering means, said lens means fixedly coupled to said image dissector tube.
Claim 4
Dependent Claim 94 words
An imaging system in accordance with claim 1, wherein said filtering means include only three differently colored filter strips positioned parallel to each other and to a plurality of parallel sections of said field of view, said aPertured electrode including only three apertures, said parallel sections being disposed transverse to said direction of movement, each filter strip providing a respective radiation image and an adjacent cathode portion providing a respective electron image, each aperture being scanned by an electron image from only one and the same said respective colored strip during each successive scan.
Claim 5
Dependent Claim 49 words
An imaging system in accordance with claim 1, wherein said plurality of apertures are scanned simultaneously by respective electron images in said direction of movement and in said transverse direction, and including three electron multipliers each associated with a corresponding one of said apertures for amplifying said output signals.
Claim 6
Dependent Claim 20 words
An imaging system in accordance with claim 4, wherein said filtering means includes red, blue and green color filter strips.
Claim 7
Dependent Claim 50 words
An imaging system in accordance with claim 1, wherein said image tube includes a radiation image transmissive faceplate, said cathode being in the form of a layer on the inner surface of and substantially coextensive with said faceplate, and said filtering means is interposed between said faceplate and said cathode.
Claim 8
Dependent Claim 64 words
An imaging system in accordance with claim 1, wherein said image tube includes a radiation image transmissive faceplate, said cathode being in the form of a layer covering the inner surface of said faceplate, and said filter strips are positioned on the outer surface of said faceplate, the areas of said faceplate not covered by said filter strips being opaque to said radiation image.
Claim 9
Dependent Claim 38 words
An imaging system in accordance with claim 1, said system further includes a radiation image transmissive mounting plate positioned in front of said one end of said image tube, said filtering means being positioned on said mounting plate.

References Cited (Backward Citations)

US2412086A Cited
US2769855A Cited
US3366735A Cited
US3472948A Cited
US3560642A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-08-15 1976-02-14 1976-08-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-08-15 1980-02-14 1980-08-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-08-15 1984-02-14 1984-08-15 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag