Corrective lens assembly
US5640613A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1995 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Apr 14, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2215/055
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens assembly, image capturing device and a method for using a lens assembly with an image capturing device. The lens assembly comprises a first lens mounted on a holder which attaches the first lens to a viewing device of an image capturing device. A marking on the first lens is observable through the viewing device when the lens is attached to the viewing device such that the marking is capable of being used to position the lens assembly a properly focused distance from a target having a specified (predetermined) size. The relationship, as seen through the viewing device between the size of the object and the size of the marking may be used to properly position the camera relative to the target object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.