Microscope eyepiece with 10.times. magnification
US6330115A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 7, 2000 |
| Grant date | Dec 11, 2001 |
| Priority date | — |
| Expiry date | Apr 7, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B25/001
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to a microscope eyepiece with theoretically reduced astigmatism in a compensating optical system. The inventive eyepiece has 10.times. magnification, a sight field (SFZ).ltoreq.25 and a Petzval sum (SP) of 0.014.ltoreq.SP.ltoreq.0.021. Said eyepiece comprises a special field lens placed in front of a field stop and a negative lens in the eye lens section placed behind said field stop. The inventive field lens is embodied in the form of a simple, thick, positively diffracting meniscus which is convex in relation to the field stop and provided with the following field lens factor: 0.95.ltoreq.beta'.ltoreq.1.05. The eye lens section can be displaced in relation to the field stop to enable diotropic adjustment. Special, advantageous embodiments of the field lens and examples of embodiments of the microscope eyepiece, complete with structural data, are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.