Title:
REFLECTION TYPE SCANNING OPTICAL SYSTEM
Document Type and Number:
Japanese Patent JPH1130710
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provided the reflection type optical system which can obtain excellent optical performance by one curved surface mirror. SOLUTION: The luminous flux emitted by a semiconductor laser 1 is deflected by a polygon mirror 4 for scanning and the deflected luminous flux is imaged by one curved surface mirror 5 on a scanned object surface 6. The curved surface mirror 5 has positive power in both the directions of horizontal scanning and vertical scanning and is so arranged as to reflect the luminous flux which is made incident from the polygon mirror 4 at a specific angle of separation to the vertical scanning direction. The curved surface mirror is asymmetrical in the vertical scanning direction about the reference straight line of the horizontal scanning direction including the optical axis.
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Inventors:
IIZUKA TAKAYUKI
Application Number:
JP20224697A
Publication Date:
February 02, 1999
Filing Date:
July 11, 1997
Export Citation:
Assignee:
ASAHI OPTICAL CO LTD
International Classes:
G02B5/10; G02B26/10; G02B26/12; H04N1/113; (IPC1-7): G02B5/10; G02B26/10; H04N1/113
Attorney, Agent or Firm:
Shuhei Matsuoka