发明名称 |
Noncontact tonometer |
摘要 |
A noncontact tonometer is provided which is capable of intercepting out-of-axis light of an index beam of light and performing precise alignment. The noncontact tonometer includes an index projecting optical system for projecting an index frontally onto a subject's eye (E) through a nozzle (12) through which gas is also is sprayed upon the eye (E). The index projecting optical system has a projection lens (27) and a diaphragm (23) disposed at a position conjugated to an end surface (F) of the nozzle (12) on the side of the projection lens (27). The diaphragm (23) intercepts rays of light traveling out of an optical axis, and enables precise alignment.
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申请公布号 |
US5989195(A) |
申请公布日期 |
1999.11.23 |
申请号 |
US19980084590 |
申请日期 |
1998.05.27 |
申请人 |
KABUSHIKI KAISHA TOPCON |
发明人 |
IIJIMA, HIROSHI;TAKAGI, AKINARI |
分类号 |
A61B3/15;A61B3/16;(IPC1-7):A61B5/00 |
主分类号 |
A61B3/15 |
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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