发明名称 |
Ophthalmic optical apparatus having an alignment optical system |
摘要 |
An ophthalmic optical apparatus having an alignment optical system comprises two conical optical elements for forming an alignment light beam into a ring-shaped collimated light beam centered on an optical axis and directing it to a focusing optical system, an in-focus state is determined based on a light pattern formed by the focusing optical system from the ring-shaped collimated light beam on an object plane.
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申请公布号 |
US5285223(A) |
申请公布日期 |
1994.02.08 |
申请号 |
US19920933096 |
申请日期 |
1992.08.21 |
申请人 |
NIKON CORPORATION |
发明人 |
UENO, YASUNORI;KANEKO, MASANOBU |
分类号 |
A61F9/00;A61B3/12;A61B18/20;A61F9/007;A61F9/008;H01S3/101;(IPC1-7):A61B3/14 |
主分类号 |
A61F9/00 |
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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