Title:
TEMPLATE FOR CABILBRATING OPHTHALMIC LENS GRINDING MACHINE, AND CORRESPONDING CALIBRATION METHOD
Document Type and Number:
Japanese Patent JP3872132
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a calibration template periodically repeatable particularly in the case of changing or truing a grinding wheel by forming the calibration template in disk shape with its circular contour forming two localized angular points circumscribed by a common circumference and having a relative angular offset.
SOLUTION: A calibration template 20 designed to be fitted to a grinding machine to be calibrated instead of an ophthalmic lens is in the general form of a disk. The contour 22 of the calibration template 20 is circular at least part of its perimeter but forms two localized angular points 23 circumscribed by a common circumference C and having a relative angular offset, and at least two separate parts 24', 24" of a circular part 22A of the contour 22 form bevels 25', 25" respectively with edge parts cut off by a cylindrical plane. The bevels 25', 25" to be formed at the edge part of the ophthalmic lens can therefore be accurately positioned on the edge part.
Inventors:
Laurent Guyrelman
Application Number:
JP12975496A
Publication Date:
January 24, 2007
Filing Date:
May 24, 1996
Export Citation:
Assignee:
Essilor Alter National Companie General Doptake
International Classes:
B24B9/14; B24B47/22; (IPC1-7): B24B9/14
Domestic Patent References:
| JP6071156A | ||||
| JP60118460A | ||||
| JP60118461A | ||||
| JP192055A |
Foreign References:
| US4596091 |
Attorney, Agent or Firm:
Minoru Nakamura
Fumiaki Otsuka
Shishido Kaichi
Toshio Imajo
Nobuo Ogawa
Village shrine Atsuo
Fumiaki Otsuka
Shishido Kaichi
Toshio Imajo
Nobuo Ogawa
Village shrine Atsuo