发明名称 |
Focal length extension used in a Newton reflecting telescope to reduce obstruction is achieved by a concave lens which expands the beam path coming from the primary mirror |
摘要 |
Focal length extension is achieved by a concave lens which expands the beam path coming from the primary mirror. The lens can be fixed in the eyepiece holder or in the barrel body.
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申请公布号 |
DE10137981(A1) |
申请公布日期 |
2003.04.10 |
申请号 |
DE20011037981 |
申请日期 |
2001.09.19 |
申请人 |
KUGLER, RUDOLF |
发明人 |
KUGLER, RUDOLF |
分类号 |
G02B23/02;(IPC1-7):G02B23/02;G02B17/08 |
主分类号 |
G02B23/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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