Double-conjugate maintaining optical system
US4592625A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1983 |
| Grant date | Jun 3, 1986 |
| Priority date | — |
| Expiry date | Feb 23, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/22
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A double-conjugate maintaining optical system for maintaining the conjugate relation between an object and its image even if the distance between the object and the image varies and also maintaining another set of conjugate relation in a predetermined condition includes an afocal system comprising a plurality of lens units, a first positive lens unit disposed on the object side of the afocal system, and a second positive lens unit disposed on the image side of the afocal system. The first positive lens unit is movable relative to the second positive lens unit so that the object is positioned on the focal plane of the first positive lens unit opposite to the afocal system. The afocal system is movable along the optical axis thereof in a predetermined relation with the first positive lens unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.