Spectacle-lens-frame configuration measuring apparatus and article configuration measuring apparatus
US4991305A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1989 |
| Grant date | Feb 12, 1991 |
| Priority date | — |
| Expiry date | May 23, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C13/003
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In an apparatus for measuring a configuration of each of a pair of lens frames (4a, 4b) of a spectacle framework (3), a measuring element (230) is arranged for horizontal and vertical movement relative to the lens frames fixedly held by a holding device (100). The measuring element is movable angularly about an optional reference point (O) within one of the lens frames, along an inner periphery of the lens frame, while causing the measuring element to be in contact with the inner periphery of the lens frame. A first detector unit (224) detects horizontal straight displacement (r) of the measuring element from the reference point. A second detector unit (233) detects vertical straight displacement (z) of the measuring element from the reference point. A third detector unit (209) detects an angle (.theta.) of the angular movement of the measuring element about the reference point. The configuration of the inner periphery of the lens frame is calculated on the basis of signals from the respective first, second and third detector units. Also disclosed are an apparatus for measuring a configuration of a substantially planar article (500), and a holding device for a pair of lens frames o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.