发明名称 |
Surveying instrument |
摘要 |
A surveying instrument includes a sighting telescope having an objective lens and an eyepiece; an erecting optical system functioning so that an image formed by said objective lens is viewed as an erect image through the eyepiece; and a light shield device, positioned in an optical path extending from an incident surface of the erecting optical system to an exit surface of the erecting optical system, for preventing an off-field light bundle which is incident on the erecting optical system from reaching the eyepiece.
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申请公布号 |
US2002051288(A1) |
申请公布日期 |
2002.05.02 |
申请号 |
US20010978542 |
申请日期 |
2001.10.18 |
申请人 |
ASAHI KOGAKU KOGYO KABUSHIKI KAISHA |
发明人 |
SHIRAI MASAMI;WAKAMIYA SHUNICHIRO;TAKAYAMA HOMU;KANEKO KENJI |
分类号 |
G01C1/02;G01S7/481;G02B27/00;(IPC1-7):G02B23/00 |
主分类号 |
G01C1/02 |
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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