Immersion microscope objective lens
US7262922B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 2005 |
| Grant date | Aug 28, 2007 |
| Priority date | — |
| Expiry date | Mar 17, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B21/33
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An immersion microscope objective lens includes, in the following order from an object side to an image side, a first lens group having positive refractive power as a whole, including a first lens component composed of a first meniscus lens and a second meniscus lens cemented to each other with their concave surfaces facing the object side, a second lens composed of a single lens having positive refractive power and a third lens composed of a negative lens and a positive lens cemented to each other, a second lens group having positive refractive power as a whole, including a fourth lens component composed of a negative lens and a positive lens cemented to each other, and a third lens group having a negative refractive power as a whole. Predetermined conditions are satisfied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.