发明授权
- 专利标题： Optical scanning system
- 专利标题（中）： 光学扫描系统
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申请号： US494076申请日： 1983-05-12
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公开(公告)号： US4620768A公开(公告)日： 1986-11-04
- 发明人: Kimio Tatsuno , Keiji Kataoka , Yoshifumi Homma , Yoshifumi Ono
- 申请人： Kimio Tatsuno , Keiji Kataoka , Yoshifumi Homma , Yoshifumi Ono
- 申请人地址： JPX Tokyo JPX Tokyo
- 专利权人： Hitachi, Ltd.,Hitachi Koki Co., Ltd.
- 当前专利权人： Hitachi, Ltd.,Hitachi Koki Co., Ltd.
- 当前专利权人地址： JPX Tokyo JPX Tokyo
- 优先权： JPX57-83083 19820519
- 主分类号： G02B26/12
- IPC分类号： G02B26/12 ; G02B27/00 ; H04N1/113 ; G02B27/17 ; G02B7/02
摘要：
An optical scanning system wherein a light beam from a laser source is reflected by a rotating polygonal mirror and focused by a scanning lens into a scanning beam spot on the drum surface. A cylindrical lens disposed between the scanning lens and the drum for correcting the unevenness of the scanning line pitch caused by the incline of the each facet of the polygonal mirror has a curvature in the scanning direction of the beam so that optimal focal points of the scanning beam spot align on a straight line.