US2173499A - Transmitter with spiral-aperture disks - Google Patents

Transmitter with spiral-aperture disks Download PDF

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Publication number
US2173499A
US2173499A US113192A US11319236A US2173499A US 2173499 A US2173499 A US 2173499A US 113192 A US113192 A US 113192A US 11319236 A US11319236 A US 11319236A US 2173499 A US2173499 A US 2173499A
Authority
US
United States
Prior art keywords
spiral
disk
transmitter
aperture disks
error
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
US113192A
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 US2173499A publication Critical patent/US2173499A/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

  • This error consists in the :3 fact that equidistant lines on the object surface no longer appear equi-distant on the disk, since with an increase in the width, which leads to the trapezoidal form, there occurs simultaneously a variation in both dimensions, which leads to the 3H fact that the lines appear to crowd together towards the narrow end of the trapezium.
  • a disk having one or more spiral 35 turns the holes of which are arranged in such a manner that the fault of the optical distortion is eliminated.
  • Such scanning disk has a spiral with a pitch increasing from one end to the other end of the spiral.
  • Fig. 1 shows the optical arrangement, wherein the ray of light I proceeding from the light source 2 at first traverses the plane of the picture, for example a film 3, then that of a lens 4, and finally that of the multiple-spiral disk 5. It is neces- 5 sary to include in each case between the planes 3,

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optical Head (AREA)
  • Facsimile Scanning Arrangements (AREA)
US113192A 1935-12-02 1936-11-28 Transmitter with spiral-aperture disks Expired - Lifetime US2173499A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE488253X 1935-12-02

Publications (1)

Publication Number Publication Date
US2173499A true US2173499A (en) 1939-09-19

Family

ID=6543768

Family Applications (1)

Application Number Title Priority Date Filing Date
US113192A Expired - Lifetime US2173499A (en) 1935-12-02 1936-11-28 Transmitter with spiral-aperture disks

Country Status (5)

Country Link
US (1) US2173499A (enrdf_load_stackoverflow)
BE (1) BE418672A (enrdf_load_stackoverflow)
FR (1) FR814223A (enrdf_load_stackoverflow)
GB (1) GB488253A (enrdf_load_stackoverflow)
NL (1) NL49159C (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2967907A (en) * 1952-06-02 1961-01-10 Hogan Faximile Corp Continuous facsimile scanning apparatus

Also Published As

Publication number Publication date
NL49159C (enrdf_load_stackoverflow)
BE418672A (enrdf_load_stackoverflow)
GB488253A (en) 1938-07-01
FR814223A (fr) 1937-06-18

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