JPS57104102A - Multirotation polyhedral mirror - Google Patents

Multirotation polyhedral mirror

Info

Publication number
JPS57104102A
JPS57104102A JP55180403A JP18040380A JPS57104102A JP S57104102 A JPS57104102 A JP S57104102A JP 55180403 A JP55180403 A JP 55180403A JP 18040380 A JP18040380 A JP 18040380A JP S57104102 A JPS57104102 A JP S57104102A
Authority
JP
Japan
Prior art keywords
polyhedral
plane
concave
faces
mirror
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.)
Granted
Application number
JP55180403A
Other languages
Japanese (ja)
Other versions
JPS6219726B2 (en
Inventor
Hisayoshi Kawabata
Kikuo Hatasawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55180403A priority Critical patent/JPS57104102A/en
Publication of JPS57104102A publication Critical patent/JPS57104102A/en
Publication of JPS6219726B2 publication Critical patent/JPS6219726B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/09—Multifaceted or polygonal mirrors, e.g. polygonal scanning mirrors; Fresnel mirrors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Laser Beam Printer (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To obtain different scanning speeds at the same speed by providing plural plane polyhedral mirrors each of which has plane reflecting faces and plural concave polyhedral mirrors each of which has the different number of faces from that of the plane polyhedral mirror, and equalizing the curvature of the concave face with each normal angle of revolution of both the plane and concave faces. CONSTITUTION:A plane polyhedral mirrorIwith n faces and a concave polyhedral mirror II with m faces are provided. When a straight line (a-b) is demoted as the plane polyhedral mirrorIand a curve (a-d-c) is regarded as the concave polyhedral mirror II in the drawing showing a part of these polyhedral mirrors, a straight line (O-Q1) with an angle theta' from a straight line (O-a) is the normal of the plane polyhedral mirrorIwhen a double rotation polyhedral mirror rotates by an angle theta' and similarly a straight line (O-Q2) with an angle theta'Xm/n from the straight ine (O-a) is the normal of the plane polyhedral mirrorIwhen the double rotation polyhedral mirror rotates by theta'Xm/n. Therefore, theta'Xm/n is the normal angle of rotation of the plane polyhedral mirrorIat that time. Since the normal angle of operation of the plane polyhedral mirrorIis equal to that of the concave polyhedral mirror II, the concave polyhedral mirror II has the scanning speed m/n times larger than that of the plane polyhedral mirrorI.
JP55180403A 1980-12-22 1980-12-22 Multirotation polyhedral mirror Granted JPS57104102A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55180403A JPS57104102A (en) 1980-12-22 1980-12-22 Multirotation polyhedral mirror

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55180403A JPS57104102A (en) 1980-12-22 1980-12-22 Multirotation polyhedral mirror

Publications (2)

Publication Number Publication Date
JPS57104102A true JPS57104102A (en) 1982-06-29
JPS6219726B2 JPS6219726B2 (en) 1987-04-30

Family

ID=16082626

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55180403A Granted JPS57104102A (en) 1980-12-22 1980-12-22 Multirotation polyhedral mirror

Country Status (1)

Country Link
JP (1) JPS57104102A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4600266A (en) * 1982-09-09 1986-07-15 Ricoh Company, Ltd. Light beam scanning apparatus with a variable scanning width

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4600266A (en) * 1982-09-09 1986-07-15 Ricoh Company, Ltd. Light beam scanning apparatus with a variable scanning width

Also Published As

Publication number Publication date
JPS6219726B2 (en) 1987-04-30

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