JPS6450011A - Optical writing head - Google Patents

Optical writing head

Info

Publication number
JPS6450011A
JPS6450011A JP20772887A JP20772887A JPS6450011A JP S6450011 A JPS6450011 A JP S6450011A JP 20772887 A JP20772887 A JP 20772887A JP 20772887 A JP20772887 A JP 20772887A JP S6450011 A JPS6450011 A JP S6450011A
Authority
JP
Japan
Prior art keywords
reflecting plate
sign
path
distance
optical system
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
JP20772887A
Other languages
Japanese (ja)
Inventor
Toshihiko Oki
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.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
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 Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP20772887A priority Critical patent/JPS6450011A/en
Publication of JPS6450011A publication Critical patent/JPS6450011A/en
Pending legal-status Critical Current

Links

Landscapes

  • Dot-Matrix Printers And Others (AREA)
  • Laser Beam Printer (AREA)
  • Mechanical Optical Scanning Systems (AREA)

Abstract

PURPOSE:To obtain a small-sized optical writing device by providing such an optical system that the distance from a polygon mirror to the surface of a photosensitive body is constant. CONSTITUTION:A sign A indicates the path on a laser light surface to be swept from the polygon mirror 3 to a 1st reflecting plate 5, a sign B the path from the 1st reflecting plate 5 to a 2nd reflecting plate 6, and a sign C the path from the 2nd reflecting plate 6 to the photosensitive drum 8 through a 3rd reflecting plate 7. Here, the distance from a semiconductor laser 1 to the surface of the photosensitive drum 8 can be made constant by shaping the 1st reflecting plate 5 and 2nd reflecting plate 6 so that A+B+C=An+Bn+Cn. Thus, the need for an f-theta lens and a special shape polygon mirror is eliminated by making the distance of laser light from the semiconductor laser 1 to the surface of the photosensitive body drum 8 constant by employing a combination of a plane and a curved surface for the optical system, thereby reducing the size of the optical system.
JP20772887A 1987-08-21 1987-08-21 Optical writing head Pending JPS6450011A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20772887A JPS6450011A (en) 1987-08-21 1987-08-21 Optical writing head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20772887A JPS6450011A (en) 1987-08-21 1987-08-21 Optical writing head

Publications (1)

Publication Number Publication Date
JPS6450011A true JPS6450011A (en) 1989-02-27

Family

ID=16544558

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20772887A Pending JPS6450011A (en) 1987-08-21 1987-08-21 Optical writing head

Country Status (1)

Country Link
JP (1) JPS6450011A (en)

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