JPS54135552A - Laser recorder - Google Patents

Laser recorder

Info

Publication number
JPS54135552A
JPS54135552A JP4360278A JP4360278A JPS54135552A JP S54135552 A JPS54135552 A JP S54135552A JP 4360278 A JP4360278 A JP 4360278A JP 4360278 A JP4360278 A JP 4360278A JP S54135552 A JPS54135552 A JP S54135552A
Authority
JP
Japan
Prior art keywords
light
photoreceptor
controller
acousto
potential differences
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
JP4360278A
Other languages
Japanese (ja)
Inventor
Michio Umezawa
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP4360278A priority Critical patent/JPS54135552A/en
Publication of JPS54135552A publication Critical patent/JPS54135552A/en
Pending legal-status Critical Current

Links

Landscapes

  • Dot-Matrix Printers And Others (AREA)
  • Laser Beam Printer (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)

Abstract

PURPOSE:To prevent degradation in the characteristics of a photoreceptor and other inconveniences and improve the quality of recording images by providing a surface electrometer in proximity to the photoreceptor, detecting the potential differences between the exposed portions and unexposed portions of the photoreceptor and adjusting the light intensities of primary light based on these. CONSTITUTION:Modulating light having been modulated by picture signal is inputted from a controller 13 to an acousto-optic modulator 4, by which the laser beam Ld emitted from a laser light source 1 is made to the primary light Lbd1 having undergone light modulation. This light is then led onto a photoreceptor 10, whereby latent images are formed. The surface electrometer 12 which is provided in proximilty to the surface of the photoreceptor 10 measures the potential differences of the exposed portions 19 and unexposed portions 20 of the photoreceptor 10 and controls a controller 13 by the results thereof. The controller in turn increases the electric input to the acousto-optic light modulator 4 when the quantity of light attenuation is insufficient as compared to the specified value, thereby increasing the quantity of right arriving at the photoreceptor 10 and optimizing the light attenuation quantity.
JP4360278A 1978-04-12 1978-04-12 Laser recorder Pending JPS54135552A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4360278A JPS54135552A (en) 1978-04-12 1978-04-12 Laser recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4360278A JPS54135552A (en) 1978-04-12 1978-04-12 Laser recorder

Publications (1)

Publication Number Publication Date
JPS54135552A true JPS54135552A (en) 1979-10-20

Family

ID=12668356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4360278A Pending JPS54135552A (en) 1978-04-12 1978-04-12 Laser recorder

Country Status (1)

Country Link
JP (1) JPS54135552A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57154973A (en) * 1981-03-19 1982-09-24 Minolta Camera Co Ltd Controller of electrostatic recorder
JPS59146456A (en) * 1983-02-10 1984-08-22 Canon Inc Controller of light quantity
JPS61100773A (en) * 1984-10-24 1986-05-19 Tokyo Electric Co Ltd Electrophotographic device
JPS61189567A (en) * 1985-02-19 1986-08-23 Canon Inc Image forming device
JPH024283A (en) * 1988-06-22 1990-01-09 Toray Ind Inc Method for scanning light beam

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788739A (en) * 1972-06-21 1974-01-29 Xerox Corp Image compensation method and apparatus for electrophotographic devices
JPS5337029A (en) * 1976-09-17 1978-04-05 Canon Inc Beam recorder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788739A (en) * 1972-06-21 1974-01-29 Xerox Corp Image compensation method and apparatus for electrophotographic devices
JPS5337029A (en) * 1976-09-17 1978-04-05 Canon Inc Beam recorder

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57154973A (en) * 1981-03-19 1982-09-24 Minolta Camera Co Ltd Controller of electrostatic recorder
JPS6151461B2 (en) * 1981-03-19 1986-11-08 Minolta Camera Kk
JPS59146456A (en) * 1983-02-10 1984-08-22 Canon Inc Controller of light quantity
JPH0555875B2 (en) * 1983-02-10 1993-08-18 Canon Kk
JPS61100773A (en) * 1984-10-24 1986-05-19 Tokyo Electric Co Ltd Electrophotographic device
JPS61189567A (en) * 1985-02-19 1986-08-23 Canon Inc Image forming device
JPH024283A (en) * 1988-06-22 1990-01-09 Toray Ind Inc Method for scanning light beam

Similar Documents

Publication Publication Date Title
JPS574780A (en) Multilevel image printer
JP2534656B2 (en) Electrostatic latent image forming apparatus using semiconductor laser
SE8402639D0 (en) VIDEO SIGNAL PROCESSOR WITH AUTOMATIC WHITE BALANCE AND DRAW CONTROL DEVICES
JPS54135552A (en) Laser recorder
CA2019683A1 (en) Process control for electrostatographic printers
JP2618914B2 (en) Electrostatic latent image forming device
JPS5727279A (en) Image forming method
JPS57130064A (en) Picture recorder
JPS56137101A (en) Optical position detecting device
JPS5720765A (en) Controller for copying
GB1500544A (en) Copying apparatus and method
JPS56123522A (en) Optical scanner
JPS5529862A (en) Electrocopying apparatus
JPS6150290B2 (en)
JPS6456465A (en) Exposure correction device for laser beam printer
JPS5722272A (en) Electrophotographic method
JPS56151946A (en) Electrophotographic copier
JPS5349436A (en) Picture density control method for electronic copier
JPH02201467A (en) Image forming method
JPS5595967A (en) Slit exposure copying unit having image erasing function
JPS5774752A (en) Laser printer
EP0385743A3 (en) Apparatus and method for electrophotographically printing continuous half-tones
JPS5710170A (en) Electrophotography method
JPS5491347A (en) Optical modulating and deflecting device for multiple beams
JPS56154765A (en) Electrophotographic recorder