Apparatus for and method of obtaining processing information for fitting lenses in eyeglasses frame and eyeglasses grinding machine
US5333412A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1992 |
| Grant date | Aug 2, 1994 |
| Priority date | — |
| Expiry date | Dec 21, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B9/144
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An eyeglass grinding machine of the present invention measures three-dimensional information on the configuration of an eyeglass frame so as to process lenses on the basis of the information thus measured. The improvement of the invention provides an apparatus for and a method of obtaining processing information for fitting lenses in the eyeglass frame that incorporate a measurement device for the three-dimensional configuration of the eyeglasses frame, including a holder device of the eyeglasses frame, a gauge head and detection device; a first calculation device for calculating a distance between the geometrical centers of both lens frame portions of the eyeglasses frame; an input device for inputting information of a pupillary distance; a second calculation device for calculating an apparent adjustment amount of the optical centers of the lenses; a third calculation device including contact elements to abut against the front and rear surfaces of the lenses; a correction means for correcting errors of the apparent adjustment amount; and a conversion device for converting the results of detection by the detection device into a predetermined form of processing information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.