Autofocus module for microscope-based systems
US6812446B2 · kind B2 · utility
10Cited by
2References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 23, 2003 |
| Grant date | Nov 2, 2004 |
| Priority date | — |
| Expiry date | Jul 23, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B21/247
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An autofocus module (30) for a microscope-based system (1) is equipped in such a way that a light source (31) which generates a measurement light bundle (32) is provided. A first axicon (34a) generates an eccentrically extending annularly divergent measurement light beam bundle (32a). A second axicon (34a) is provided in order to parallelize the remitted divergent measurement light beam bundle (32b). A differential diode (42) is mounted in the module (30) for determination of the focus position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.