Holding device for cutting an ophthalmic lens

A holding device for cutting an ophthalmic lens, which holds a lens workpiece rotatable around a center axis of cutting, the holding device comprising:

• a lens holding member having a spherical sliding surface,
• a support member having a spherical receiving surface by which the spherical sliding surface of the lens holding member is slidably supported on the spherical receiving surface,
• a fixing member adjustably positioning the lens holding member with respect to the support member;
• a jig having a spherical surface on which a lens workpiece is mounted during a cutting operation, said jig being held by said lens holding member such that a spherical center of the spherical surface of said jig coincides with a spherical center of said spherical sliding surface wherein the lens holding member includes a sliding collar and a collet chuck, said spherical sliding surface is disposed on said sliding collar and said collet chuck is axially movable with respect to said sliding collar.

A holding device for cutting an ophthalmic lens, which holds a lens workpiece rotatable about a center axis of cutting, the holding device comprising:

• a lens holding member having a spherical sliding surface,
• a support member having a spherical receiving surface by which the spherical sliding surface of the lens holding member is slidably supported on the spherical receiving surface,
• fixing means for adjustably positioning the lens holding member with respect to the support member;
• a jig having a spherical surface on which a lens workpiece is mounted during a cutting operation, said jig being held by said lens holding member such that a spherical center of the spherical surface of said jig coincides with the spherical center of said spherical surface;
• a sliding piece slidably disposed in said support member;
• and
• a rod having first and second ends, said first end being connected to said sliding piece and said second end being connected to said lens holding member wherein said second end of said rod is pivotally connected to said lens holding member, the lens holding member includes a sliding collar and a collet chuck, said spherical sliding surface is disposed on said sliding collar, said collet chuck is axially movable with respect to said sliding collar, and wherein said rod is pivotally connected to each of said sliding collar and said collet chuck.

A holding device for cutting an ophthalmic lens, which holds a lens workpiece rotatable about a center axis of cutting, the holding device comprising:

• a lens holding member having a spherical sliding surface,
• a support member having a spherical receiving surface by which the spherical sliding surface of the lens holding member is slidably supported on the spherical receiving surface,
• a fixing member adjustably positioning the lens holding member with respect to the support member;
• a jig having a spherical surface on which a lens workpiece is mounted during a cutting operation, said jig being held by said lens holding member such that a spherical center of the spherical surface of said jig coincides with the spherical center of said spherical surface;
• a sliding piece slidably disposed in said support member;
• and
• a rod having first and second ends, said first end being connected to said sliding piece and said second end being connected to said lens holding member wherein said second end of said rod is pivotally connected to said lens holding member, the lens holding member includes a sliding collar and a collet chuck, said spherical sliding surface is disposed on said sliding collar, said collet check is axially movable with respect to said sliding collar, and wherein said rod is pivotally connected to each of said sliding collar and said collet chuck.