Liquid-immersion type objective lens system for microscopes
US5530590A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1994 |
| Grant date | Jun 25, 1996 |
| Priority date | — |
| Expiry date | Mar 28, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B21/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid-immersion type objective lens system for microscopes comprising a first lens unit which comprises a plano-convex lens component or a plano-convex lens component having a cemented surface strongly convex on the image side and a positive lens component, a second lens unit which has a positive refractive power, and comprises a cemented surface having a strongly negative refractive power and allows a converging light bundle to emerge therefrom, and a third lens unit having a negative refractive power. The object system is configured so as to be capable of correcting variations of aberrations by moving the second lens unit relative to the first lens unit and the third lens unit in accordance with a thickness of a cover glass plate used in combination with the objective lens system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.