Stereoscopic microscope with high numerical aperture
US7724427B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 2005 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Feb 4, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B21/22
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A telescope-type stereomicroscope which is outfitted with an objective and two magnification changers arranged downstream of the objective. In this telescope-type stereomicroscope, the light from an object that is being examined enters the objective. Two light bundles of the light re-exiting from the objective, which are oriented parallel to one another, enter the magnification changers. The optical axes of the magnification changers are arranged at a fixed distance from one another. Each magnification changer has an entrance pupil for the light bundle associated with it. The entrance pupil has a diameter DEP that depends on the respective selected magnification, where the condition DEP>B/1.06 is met at the maximum selected magnification. Optionally, the stereomicroscope meets the condition tan(ω)≧0.16 with respect to the angle ω at which the light coming from an extra-axial point P at the object enters the magnification changers at the lowest possible magnification setting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.