Title:
【発明の名称】fθレンズ及びそれを用いたレーザー走査光学系
Document Type and Number:
Japanese Patent JP2673591
Kind Code:
B2
Abstract:
An f8 lens having a skew correction function for use in a scanning optical system comprises a first lens having a negative power in a main scan plane, a second lens having a positive power in the main scan plane and arranged next to the first lens, a third lens having a toric plane and a positive power in the main scan plane and arranged next to the second lens, and an air lens formed between the first lens and the second lens having a positive power in the main scan plane.
Inventors:
Jun Makino
Application Number:
JP33064889A
Publication Date:
November 05, 1997
Filing Date:
December 20, 1989
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B26/10; G02B13/00; (IPC1-7): G02B26/10; G02B13/00
Domestic Patent References:
| JP6378120A | ||||
| JP62200314A | ||||
| JP60100118A |
Attorney, Agent or Firm:
Kato Kazuo