Microscope photography lens system
US5847869A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 15, 1997 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Aug 15, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B21/361
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention allows one to take an intermediate image formed by a microscope objective lens system and reform a clear image of it, at relatively low magnification, on a film surface. The present invention provides for a lens system which comprises, in order, from the observed object end, a first lens group having a convex surface facing toward the objective lens system end, and having positive refractive power, a second lens group, positioned to the rear of the intermediate image, and having negative refractive power, and a third lens group having positive refractive power. The lenses in the system are set to follow predetermined parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.