US1924277A - Television system - Google Patents

Television system Download PDF

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Publication number
US1924277A
US1924277A US475187A US47518730A US1924277A US 1924277 A US1924277 A US 1924277A US 475187 A US475187 A US 475187A US 47518730 A US47518730 A US 47518730A US 1924277 A US1924277 A US 1924277A
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US
United States
Prior art keywords
subject
scanning
light
transmission
picture
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
US475187A
Other languages
English (en)
Inventor
Alfred N Goldsmith
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
Priority to BE381994D priority Critical patent/BE381994A/xx
Application filed by RCA Corp filed Critical RCA Corp
Priority to US475187A priority patent/US1924277A/en
Application granted granted Critical
Publication of US1924277A publication Critical patent/US1924277A/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
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof

Definitions

  • the present invention relates to television systems, and, in particular, to television systems wherein the transmitter of the system is soarranged that both approaching and receding shots may be made while still maintaining an automatic focusing of the transmitted picture image upon the scanning element, or of a light spot, as I in spot ordirect scanning", upon the picture surface.
  • A- further object is to provide a system for transmitting television subjects wherein the lens arranged to focus the picture subject upon the scanning element or a lightspot on the subject is automatically adjusted in accordance with the position of a carriage or like element carrying the complete television transmitter assemblage.
  • the television scanning is produced by means -of a rotatable disk having a spiral track thereon provided with either lenses or apertures, mirrors orother optical means, so arranged that suc- I cessive picture elements, as scanned, influence the current output'from a suitable light translating element.
  • the current output from the light translating element may then represent directly a function 'of the intensity of light and shadow on each elemental area of the transmitted'subject.
  • a suitable lens system for focusing the picture image to be transmitted upon the scanning element, as in indirect scanning, or a light spot from the scanning element upon the subject, as in direct or spot scanning, and this lens element'hasbeen so arranged that it is automatically adjusted in accordance with.v the position of the transmitted picture subject with respect to the scanning element;
  • Fig. 1 illustrates one form 0i system suitable for in-e direct scanning wherein .the image to be transmittedis suitablyfocused upon the scanning element;
  • Fig.2 illustrates one form of apparatus capable of indirect or spot scanning wherein a light beam is suitably focusedv upon the picture image for light corresponding to the intensity of light and shadow of each elemental area of the picture subject 1 is caused topass through the-apertures or lenses '1'? carried by the disk and throughthe opening 13 in the housing 11 ifor the photo .cll ,9, so that the photo cell 9 1s subjected to all varying light intensities corresponding to each area of the picture.
  • FIG. 1 Fig. 1 has been utilized with certain modifications r I I I
  • the :light ⁇ S ,forilluminating the subject 1' whichis @to be transmitted originates behindg'the scanning element 7 and "is ,projected through :the apertures or lenses, 1'"! thereof to-the lensrsystem 3.
  • a scanning device for 'analyzing the varying intensities of light and shadow upon cyclically recurring series of successive elemental areas of a subject of which the image is desired, an optical system associated with the scanning device, means for carrying the said scanning device toward or away from the subject of transmission, and automatic means operable upon movement of said carrying means for maintaining in focus the optical system used in the;
  • a scanning device for analyzing the varying intensities of-light and shadow upon cyclically recurring series of elemental areas of a subject of which the image is desired
  • a scanning device for analyzing the varying intensities of light and positions thereof relative shadow upon cyclically recurring series of successive elemental areas of a'subject ofwhich the image is desired, an optical system associated with the scanning device for focusing a subject for transmissiongthereupon, means for carrying g both said scanning device and optical 'systemj-toward orjaway from the-subject forntransmission, and automatic means operable upon movement of said carrying means for maintaining the subject for transmission in vice.
  • a scanning device for analyzing the varying intensities oflightand shad focus upon said scanning de- .ow upon cyclically recurringuseries of successive elemental areas of a subjectof which the image is L scanning device for focusinga' subject fortrans mission thereupon, means forcarryingboth said scanning I device and optical ,system toward or I away from the subject for transmission, and auto- ,desired, an opticalsystem associated-with the vmatic means operable upon movement of said f carrying means for focusing a spot of lightzupon an elemental area of the subjectfor transmission.
  • a scanning element for any alyzing the varyingintensities of 'lightandshadow upon'cyclically recurring series of successive elemental areas of a subject of which the image is desired, an optical system associatedwith'the scanning element for focusing an image for transmission upon said scanning element, means for moving said scanning element toward. or away from the subject of transmission, and means automatically operable upon movement of said scanning eiement for maintaining 'the image of the subject of transmissionin focus upon said scanning device for all positions thereof relative to the subject of transmission.
  • a scanning element In a television system, a scanning element, alight source for directing light through said element and an optical system for directing the light 'passingthrough said scanning element upon a subject for transmission, means for moving said scanning element toward or away from the sub- 1 ject of transmission, and means operable upon movement of said scanning device for focusing the light rays passing through said scanning'element upon the subjectfor transmission for all scanning element.
  • a scanning element In a television system, a scanning element, a light sensitive mediumfor translating variable .intensitiesof light and shadow of a subject of to the position of the transmission as analyzed by said scanning' elea ment into proportionatestrength electric current impulses, an optical system coordinatedwith said scanning element for focusing an image of the subject of transmission thereupon, a ,movable carriage carrying said scanning element and optical system and capable "of movement toward; or away from the subject of transmission, and means operable upon movement 0f said carriage relative to the subject of transmission for simultaneously maintaining said optical system in focus.
  • source of light for illuminating a subject for] transmission, a light sensitive medium for trans- 1 lating variable intensities of light and shadow of elemental areas of the subject for transmission into proportionate strength electric currentimpulses, an optical system coordinated with said 1 scanning, element fo'rfocusing the light issuing from said source 'upon the subject for transmis 1 elementand optical system and capable of movesion, a'movable carriage carrying said scanning merit towardoraway irom the subject of trans- .0w upon cyclically wrecurrin g series of successive elemental areas of a subj'ectof which the image is desired, an optical system associated with the scanning device, means for carrying said-scan- -ning.-.device itowardzor away from the subject of transmissioniwhich'isito be scanned, and auto- :matically operable means for simultaneously -ow 'iupon' cyclically :re'curring series of successive elemental areas of a (subject of which-the image :is :desi
  • .ra iscanning device for analyzing the varying intensities :of light and shadow upon cyclically recurring series of successive "elemental areas of a 'subject'of 'Whl'Chthe image usana-7 is desired, anaopticalsystem associated with the scanning -;device, means for carrying said scan ning' device toward or away from the subject of transmission, and a rotatable cam surface cooperating with said optical system and. adapted to be changed as to its-position by motionof the r analyzing system'so as to maintain automatically 1 saidoptica'lsystem in-focus during motion of said scanning device relative to thesubject of transmission.
  • a scanning element for analyzing the varying intensities or lightand shad- 7 0w upon cyclically recurring series of successive elemental areas of a subject of which the image e is 'desired'and an optical system associated with "the scanning element for focusing an image :of the subject for transmission upon said "scanning v elementya.
  • movable carriage for carrying both *saidscanning element and saidoptical system to-' ward or away from the subject of transmission, and a cam surface in cooperative engagement with said optical systern and adapted to be-moved bythe motion of said carriage relativ'e'torthe subject of transmission. for automatically adjusting said opticalsys'tem to maintain the i'ma'ge'oi subject in focus upon said scanning element.
  • a scanning'device'for analyzing varying intensities of light and shadow on successive elemental areas of a subject of which an image is to be transmitted an optical system associated with the scanning device, and

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)
US475187A 1930-08-14 1930-08-14 Television system Expired - Lifetime US1924277A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE381994D BE381994A (enrdf_load_stackoverflow) 1930-08-14
US475187A US1924277A (en) 1930-08-14 1930-08-14 Television system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US475187A US1924277A (en) 1930-08-14 1930-08-14 Television system

Publications (1)

Publication Number Publication Date
US1924277A true US1924277A (en) 1933-08-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
US475187A Expired - Lifetime US1924277A (en) 1930-08-14 1930-08-14 Television system

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US (1) US1924277A (enrdf_load_stackoverflow)
BE (1) BE381994A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
BE381994A (enrdf_load_stackoverflow)

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