US2173501A - Scanning device - Google Patents

Scanning device Download PDF

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Publication number
US2173501A
US2173501A US157721A US15772137A US2173501A US 2173501 A US2173501 A US 2173501A US 157721 A US157721 A US 157721A US 15772137 A US15772137 A US 15772137A US 2173501 A US2173501 A US 2173501A
Authority
US
United States
Prior art keywords
disc
interceptor
scanning
spiral
light
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
US157721A
Other languages
English (en)
Inventor
Schlesinger Kurt
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.)
Loewe Opta GmbH
Original Assignee
Loewe Opta GmbH
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 Loewe Opta GmbH filed Critical Loewe Opta GmbH
Application granted granted Critical
Publication of US2173501A publication Critical patent/US2173501A/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
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/02—Scanning details of television systems; Combination thereof with generation of supply voltages by optical-mechanical means only
    • H04N3/04—Scanning details of television systems; Combination thereof with generation of supply voltages by optical-mechanical means only having a moving aperture also apertures covered by lenses

Definitions

  • both discs are also ducted, e. g. by a prism M (Fig. 1), to a special 20 arranged in subsequent image planes of the optic photo-cell 45 or even to the image photo-cell.
  • Fig. 1 shows diagrammatically the optic armay be provided on the diaphragm i9. rangement, It has been found to be particularly conveni- Fig. 2 an interceptor according to the invenent to break the comparatively long way of the tion, light by means of a mirror.
  • Fig. 3 shows the Fig. 3 a modification of the arrangement of arrangement then resulting, which can be ac- 30 Fig. 1. commodated within a very small space.
  • the apparatus is provided scanning disc 8, reproducing objectives I9 and with a device correcting in a known manner the II, film l2 and machine l8 operating it are arkeystone effect produced by the use of spirally arranged on a table ll.
  • the table I! there apertured scanning discs by inclining the shaft is arranged the light source I with reflector 2 35 of the scanning disc towards the optic axis by an and condenser 3, the interceptor 4, the objectives angle on. 6 and I and the vertical mirror I6.
  • I is an arc lamp, which by way of a
  • the interceptor is here e. g. mounted on a verconcave reflector 2 and a condenser 3 lights a tical shaft; consequently a cone 4 having a more peculiarly formed conical intercepting disc 4.
  • acute angle is to be used.
  • the intercepting disc 4 is driven by the motor 5 I claim: and is by means of the objectives 6 and l repro- 1.
  • a scanning arduced onto the scanning disc 8 driven by the rangement comprising a source of light, a light synchronous motor 9 with 2 to 4 times the cirbeam concentrating device, a rotating interceptor cumferential velocity of 5.
  • the scanning disc 9 diaphragm, a scanning disc having a spiral of 45 is projected by the objectives IE1 and H onto the apertures of more than one turn, a film to be inclined plane of the film E2 to be transmitted. scanned and two Optica Sy for projecting After it the photo-cell (not shown) is placed.
  • a scanning arrangement comprising a source of light, a light beam concentrating device, a rotating interceptor diaphragm, a scanning disc having a spiral of apertures of more than one turn, a film to be scanned and two optical systems for projecting the plane of said interceptor on said disc and of said disc on the film, respectively, said interceptor having a conical border being provided with a spiral aperture of one turn for uncovering alternately one of said disc spiral turns, the shaft of said disc and that of said interceptor being horizontal, said interceptor being arranged between light source and scanning disc.
  • a scanning arrangement comprising a source of light, a light beam concentrating device, a rotating interceptor diaphragm, a scanning disc having a spiral of apertures of more than one turn, a film to be scanned and two optical systems for projecting the plane of said interceptor on said disc and of said disc on the film, respectively, said light beam passing in a straight line inclined to the horizontal from said light source to said film and perpendicularly through said, interceptor, and, for correcting the keystone distortion, aslant through said disc, said interceptor having a conical border being provided with a spiral aperture of one turn for uncovering alternately one of said disc spiral turns, the shaft of said disc and that of said interceptor being horizontal.
  • a scanning arrangement comprising a source of light, a light beam concentrating device, a rotating interceptor diaphragm, a scanning disc having a spiral of apertures of more than one turn, a film to be scanned and two optical systems for projecting the plane of said interceptor on said disc and of said disc on the film, respectively, said interceptor having a vertical shaft and a conical portion being provided with a spiral aperture of one turn for uncovering alternately one of said disc spiral turns, the shaft of said disc being horizontal.
  • a scanning arrangement comprising a source of light, a light beam concentrating device, a rotating interceptor diaphragm, a scanning disc having a spiral of apertures of more than one turn, a film to be scanned and two optical systems for projecting the plane of said interceptor on said disc and of said disc on the film, respectively, said interceptor having a vertical shaft anda conical portion beingprovided with a spiral aperture of one turn for uncovering alternately. one of said disc spiral turns, the shaft of said disc being horizontal, means for shortening the total length of the arrangement, said means consisting of a mirror situated between said disc and said interceptor, said mirror reflecting the light ray at an acute angle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)
  • Facsimile Scanning Arrangements (AREA)
US157721A 1936-08-08 1937-08-06 Scanning device Expired - Lifetime US2173501A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200861X 1936-08-08

Publications (1)

Publication Number Publication Date
US2173501A true US2173501A (en) 1939-09-19

Family

ID=5763248

Family Applications (1)

Application Number Title Priority Date Filing Date
US157721A Expired - Lifetime US2173501A (en) 1936-08-08 1937-08-06 Scanning device

Country Status (6)

Country Link
US (1) US2173501A (en)van)
BE (1) BE422996A (en)van)
CH (1) CH200861A (en)van)
FR (1) FR825264A (en)van)
GB (1) GB500225A (en)van)
NL (1) NL56746C (en)van)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3173993A (en) * 1961-10-31 1965-03-16 Hogan Faximile Corp Facsimile sync pulse generation system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3173993A (en) * 1961-10-31 1965-03-16 Hogan Faximile Corp Facsimile sync pulse generation system

Also Published As

Publication number Publication date
BE422996A (en)van)
CH200861A (de) 1938-10-31
NL56746C (en)van)
GB500225A (en) 1939-02-06
FR825264A (fr) 1938-02-28

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