Microscope photometer tube
US4889426A · kind A · utility
2Cited by
3References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1988 |
| Grant date | Dec 26, 1989 |
| Priority date | — |
| Expiry date | Oct 21, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B21/0096
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photometer tube for microscopes is provided with a device by means of which the measurement field diaphragm of the photometer is superimposed on the intermediate image of the object in the binocular tube. For the reflecting-back of the measurement field diaphragm, which is illuminated from the rear, into the binocular tube, the residual reflection of an uncoated glass-air interface in the ray path between the objective and the beam divider of the microscope is utilized. This surface may be one of the surfaces of the tube lens systems of the microscope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.