Lens holding device capable of adjusting lens position
US5357300A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1992 |
| Grant date | Oct 18, 1994 |
| Priority date | — |
| Expiry date | Jul 28, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/023
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a lens holding device, a plurality of protrusions of equal height are provided oppositely at the front and rear of the periphery of a plastic photographic lens. The plurality of protrusions are substantially equidistant. Three sets of stairs, each having a plurality of steps with a predetermined difference in height between adjacent steps, are provided at positions corresponding to the protrusions in a lens receiving member and a lens pressing member, between which the lens is sandwiched. The position of the lens can be adjusted from a most advanced position to a most retreated position along the optical axis by selecting a preferred step of each of the stairs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.