Variable-inclination-angle lens-barrel for microscopes and microscope system
US6188515A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 20, 1999 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | Aug 20, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/0816
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens system for a microscope having a variable angle lens-barrel. The lens-barrel includes an afocal optical system lying along an optical path extending from an infinite correction type objective lens to an ocular lens and comprises a first lens group which has positive refractive power, a second lens group which has negative refractive power, and a third lens group which has positive refractive power. The lens system includes a reflective mirror positioned between the second lens group and the third lens group which is mounted for rotation a out a pendular axis. Light through the infinite correction type objective lens becomes a parallel light beam which is passed to the third lens group from the reflective mirror.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.