Follow-up fixed focus system
US9804379B2 · kind B2 · utility
0Cited by
9References
15Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 29, 2015 |
| Grant date | Oct 31, 2017 |
| Priority date | — |
| Expiry date | Dec 29, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B25/005
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A follow-up fixed focus system includes a fixed focus device, and the second end of the fixed focus device is in contact with a sample plate; when the sample plate has a small protrusion, the second end of the fixed focus device is pushed by the protrusion of the sample plate. When the sample plate has a small depression, the second end of the fixed focus device is in contact with the sample plate all the time under the action of self gravity of an observation device, so that the imaging distance between an object lens and the sample plate is kept unchanged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.