Intermediate lens barrel for microscope
US5717520A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 1996 |
| Grant date | Feb 10, 1998 |
| Priority date | — |
| Expiry date | Jul 10, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B21/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An intermediate lens barrel for a microscope, in which an image is formed only once, the direction of the image does not change when returning to the original optical path, and no pupil aberration occurs. In this intermediate lens barrel, assuming that its round optical path is formed by n pieces of reflecting surfaces R (n being an even number not smaller than 4), an intermediate image is formed once in the round optical path, the angle formed by the normal N.sub.1 of the first reflecting surface R.sub.1 and the normal N.sub.2 of the second reflecting surface R.sub.2 with respect to each other when projected onto a plane orthogonal to the optical axis X.sub.1 reflected by the first reflecting surface R.sub.1 is .alpha..sub.1, the angle formed by the normal N.sub.N of the reflecting surface R.sub.N and the normal N.sub.1 of the reflecting surface R.sub.1 with respect to each other when projected onto a plane orthogonal to the optical axis X.sub.N reflected by the reflecting surface R.sub.N is .alpha..sub.N, the relationship: EQU (.alpha..sub.1 +.alpha..sub.3 + . . . +.alpha..sub.N-1)-(.alpha..sub.2 +.alpha..sub.4 + . . . +.alpha..sub.N)=180.degree.++360.degree..times.n (n being an …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.