发明授权
- 专利标题： Compact zoom lens
- 专利标题（中）： 紧凑型变焦镜头
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申请号： US329588申请日： 1989-03-27
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公开(公告)号： US5011272A公开(公告)日： 1991-04-30
- 发明人: Hiroki Nakayama , Nozomu Kitagishi , Jun Hattori , Shigeyuki Suda , Akihisa Horiuchi
- 申请人： Hiroki Nakayama , Nozomu Kitagishi , Jun Hattori , Shigeyuki Suda , Akihisa Horiuchi
- 申请人地址： JPX Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX59-271261 19841221; JPX60-102399 19850513; JPX60-138195 19850625
- 主分类号： G02B15/16
- IPC分类号： G02B15/16
摘要：
A zoom lens including at least two lens units of which the front one is of positive refractive power and the rear one is of negative refractive power, the units being axially movable to decrease their separation in zooming from the wide angle to the telephoto end. At least one of the lens units is provided with at least one refractive index distribution type lens arranged on a common optical axis of the other lenses in order to achieve a great advance in compactness.
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