Stereomicroscope including a single variable magnification optical system
US5227914A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1991 |
| Grant date | Jul 13, 1993 |
| Priority date | — |
| Expiry date | Jul 12, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B21/22
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A stereomicroscope is equipped with an objective lens, a variable magnification optical system having an optical axis common with that of the objective lens, a splitting optical system splitting emergent light from the variable magnification optical system into a plurality of optical paths, and an eyepiece disposed in at least one of the optical paths, having a diameter larger than the interpupil distance of an observer. Thus, the stereomicroscope has advantages that, with a simple structure and easy adjustment, many people can make observations, the mountings of photographic and TV devices are possible, the directions in which plural observers see through the microscope can be changed, and eyestrain is difficult to occur which may be caused by the difference in magnification between the images of a bilateral observation optical system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.