Optical system and optical apparatus having the same
US6115188A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1998 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | Oct 14, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/143105
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical system includes, in order from an object side, a first lens unit of positive refractive power, a second lens unit of negative refractive power, the second lens unit being movable along an optical axis to effect focusing, and a third lens unit of positive refractive power, the third lens unit including, in order from the object side, a first lens subunit of positive refractive power, a second lens subunit of negative refractive power and a third lens subunit of positive refractive power, wherein the second lens subunit is movable in directions perpendicular to the optical axis to displace an image formed by the optical system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.