Front lens group for immersion microscope objective in BD versions of high aperture
US4634234A · kind A · utility
32Cited by
1References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 29, 1984 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Aug 29, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B21/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to a front lens group for an immersion objective of BD arrangement with high aperture, suitable for a dark field incident illumination of a widefield immersion objective for microscopes. A spherical front lens surface is provided with a totally reflecting aspherical surface section via which the light is guided to the object, and is combined with a suitable epipolar system to produce a widefield immersion objective of even and colorfree illumination. The lens group is forwardly self-contained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.