JPS5732414A - Laser beam scanner - Google Patents

Laser beam scanner

Info

Publication number
JPS5732414A
JPS5732414A JP10727880A JP10727880A JPS5732414A JP S5732414 A JPS5732414 A JP S5732414A JP 10727880 A JP10727880 A JP 10727880A JP 10727880 A JP10727880 A JP 10727880A JP S5732414 A JPS5732414 A JP S5732414A
Authority
JP
Japan
Prior art keywords
scale
scanning
optical system
actual
scanning 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.)
Pending
Application number
JP10727880A
Other languages
Japanese (ja)
Inventor
Toshio Ike
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP10727880A priority Critical patent/JPS5732414A/en
Priority to US06/280,053 priority patent/US4408826A/en
Priority to DE19813129503 priority patent/DE3129503A1/en
Publication of JPS5732414A publication Critical patent/JPS5732414A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/047—Detection, control or error compensation of scanning velocity or position
    • H04N1/053—Detection, control or error compensation of scanning velocity or position in main scanning direction, e.g. synchronisation of line start or picture elements in a line
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/113—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using oscillating or rotating mirrors
    • H04N1/1135—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using oscillating or rotating mirrors for the main-scan only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04—Scanning arrangements
    • H04N2201/047—Detection, control or error compensation of scanning velocity or position
    • H04N2201/04701—Detection of scanning velocity or position
    • H04N2201/0471—Detection of scanning velocity or position using dedicated detectors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04—Scanning arrangements
    • H04N2201/047—Detection, control or error compensation of scanning velocity or position
    • H04N2201/04701—Detection of scanning velocity or position
    • H04N2201/04734—Detecting at frequent intervals, e.g. once per line for sub-scan control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04—Scanning arrangements
    • H04N2201/047—Detection, control or error compensation of scanning velocity or position
    • H04N2201/04701—Detection of scanning velocity or position
    • H04N2201/04744—Detection of scanning velocity or position by detecting the scanned beam or a reference beam
    • H04N2201/04746—Detection of scanning velocity or position by detecting the scanned beam or a reference beam after modulation by a grating, mask or the like

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Mechanical Optical Scanning Systems (AREA)

Abstract

PURPOSE:To improve the precision of a scale itself by deflecting the actual scanning light of an actual scanning optical system and the scale scanning light of a scale scanning optical system by the same surface of a laser beam deflector and by equalizing the optical length of the optical path from a deflection point to a scanning surface to that from the deflection point to a scale. CONSTITUTION:The actual scanning light r1 of an actual scanning optical system 11 and the scale scanning light r2 of a scale scanning optical system 17 are deflected by the same surface of a rotary polygon mirror 9, so the actual scanning optical system and scale scanning optical system are arranged nearly in the same optical- path states. The device is therefore miniaturized and a cylindrical lens 8 and a scanning lens 10 are used in common. Further, the actual scanning light r1 and the scale scanning light r2 are deflected by exactly the same surface to make corrections with fidelity, and the optical paths from a deflection point to a scanning surface 12 and a scale 18 are equalized in length, thereby increasing the scale pitch of the scale 18.
JP10727880A 1980-08-05 1980-08-05 Laser beam scanner Pending JPS5732414A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP10727880A JPS5732414A (en) 1980-08-05 1980-08-05 Laser beam scanner
US06/280,053 US4408826A (en) 1980-08-05 1981-06-30 Apparatus for scanning a laser beam including means for focusing a scale scanning beam and a read/write scanning beam on the same facet of a polygon scanning mirror
DE19813129503 DE3129503A1 (en) 1980-08-05 1981-07-27 LASER BEAM DEFLECTOR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10727880A JPS5732414A (en) 1980-08-05 1980-08-05 Laser beam scanner

Publications (1)

Publication Number Publication Date
JPS5732414A true JPS5732414A (en) 1982-02-22

Family

ID=14455009

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10727880A Pending JPS5732414A (en) 1980-08-05 1980-08-05 Laser beam scanner

Country Status (1)

Country Link
JP (1) JPS5732414A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013120336A (en) * 2011-12-08 2013-06-17 Ricoh Co Ltd Optical scanning device and image forming apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013120336A (en) * 2011-12-08 2013-06-17 Ricoh Co Ltd Optical scanning device and image forming apparatus

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