JPS56149173A - Scanner forming half-tone picture - Google Patents

Scanner forming half-tone picture

Info

Publication number
JPS56149173A
JPS56149173A JP5329380A JP5329380A JPS56149173A JP S56149173 A JPS56149173 A JP S56149173A JP 5329380 A JP5329380 A JP 5329380A JP 5329380 A JP5329380 A JP 5329380A JP S56149173 A JPS56149173 A JP S56149173A
Authority
JP
Japan
Prior art keywords
light
light beam
directing path
deflected
optical element
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
JP5329380A
Other languages
Japanese (ja)
Inventor
Naoto Kawamura
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP5329380A priority Critical patent/JPS56149173A/en
Publication of JPS56149173A publication Critical patent/JPS56149173A/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
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/032—Details of scanning heads ; Means for illuminating the original for picture information reproduction
    • H04N1/036—Details of scanning heads ; Means for illuminating the original for picture information reproduction for optical reproduction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Fax Reproducing Arrangements (AREA)

Abstract

PURPOSE:To obtain stable half-tone pictures without any influence of fluctuations of photosensitivity characteristics on a recording and display surface, by using a scan system which varies the number of dots of a scanning beam. CONSTITUTION:A beam emitted from semiconductor laser light source 2 is incident to the thin-film wave directing path of optical element 1. The light beam in the wave directing path is collimated by geodesic lens 3 and the parallel beam is deflected by the Bragg diffraction with a surface elastic wave generated by comb type electrode 5. This deflected light beam is focused via geodesic lens 4 to form a light spot on the projection end surface of the wave directing path. The formed image spot is scanned by rotary polygon mirror 7 at right angles to the main scan direction to draw the locus of the light beam on photosensitive drum 9. The optical output of laser 2 is turned ON/OFF synchronizing with the deflection of this optical element. The drive like this provides gradations of the density of the light dot.
JP5329380A 1980-04-21 1980-04-21 Scanner forming half-tone picture Pending JPS56149173A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5329380A JPS56149173A (en) 1980-04-21 1980-04-21 Scanner forming half-tone picture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5329380A JPS56149173A (en) 1980-04-21 1980-04-21 Scanner forming half-tone picture

Publications (1)

Publication Number Publication Date
JPS56149173A true JPS56149173A (en) 1981-11-18

Family

ID=12938668

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5329380A Pending JPS56149173A (en) 1980-04-21 1980-04-21 Scanner forming half-tone picture

Country Status (1)

Country Link
JP (1) JPS56149173A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52106737A (en) * 1976-03-04 1977-09-07 Canon Inc Picture recorder

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52106737A (en) * 1976-03-04 1977-09-07 Canon Inc Picture recorder

Similar Documents

Publication Publication Date Title
US5748352A (en) Optical scanning device
JP3212153B2 (en) Device for spot position control in optical output device using variable wavelength light source
EP0288970B1 (en) Optical system for flyingspot scanning system
EP0049165B1 (en) Raster scanners
JP3212152B2 (en) Spot position control method in optical output device using variable wavelength light source
EP0049164B1 (en) Optical system
JPH08248340A (en) Laser beam scanner
JPH05224142A (en) Electrooptical controller and system for spot position control in optical output device
US5574491A (en) Apparatus spot position control in an output device employing a linear array of light sources
US4156555A (en) Apparatus and method for providing unblurred images with a continuously scanned light beam
US4270149A (en) Laser beam facsimile apparatus
JPH05232392A (en) Spot position control method in optical output device using electrooptical controller
JPS56149173A (en) Scanner forming half-tone picture
JPH07111509B2 (en) Optical scanning device
JPH0519598A (en) Exposing device for electrophotographic device
JPS56135823A (en) Scanning optical system forming medium contrast image
JPS6137606B2 (en)
JPH0548461B2 (en)
JP2992305B2 (en) Image forming device
SU857920A1 (en) Device for half-tone image recording
JPS5723913A (en) Scanning recorder using plural beams
JPH085210B2 (en) Optical beam scanning recording apparatus and control method thereof
JPS56114959A (en) Copying apparatus having laser beam printer function
JPS5494053A (en) Light spot scanner
JPH08220457A (en) Optical scanner