Abstract:
The present invention is a method for producing a spectacle lens from a lens material, and includes: a marking step (step S10) of marking an identification mark for identifying the spectacle lens, and a processing information mark which is used to process a lens blank and includes a tray identification 2D code, a tray identification code, a shape line and a position mark by forming a hole or a groove in a convex surface of the lens material by laser; and a concave surface machining processing step (step S13) of reading the processing information mark, and machining a concave surface of the lens blank based on the read processing information mark.
Abstract:
The invention concerns a process for measuring and/or controlling a polishing process of an ophthalmic element (1) comprising the steps of manufacturing at least two cavities (2, 3) on the surface of the element to be polished, the depth of the first cavity (2) being smaller than the depth of the second cavity (3) operating the polishing process considering the element (1), in order to check that the first cavity (2) is suppressed and that the second cavity (3) is present.
Abstract:
A cup attaching apparatus for attaching a cup as a processing jig to an eyeglass lens, comprises: an illumination optical system comprising an illumination light source and arranged to illuminate the lens from a side of a front surface of the lens by illumination light from the light source; an imaging optical system comprising an imaging device and a retroreflection member placed on an opposite side from the light source with respect to the lens, the imaging optical system being adapted such that the retroreflection member returns the illumination light passing through the lens back to its incoming direction, and the imaging device receives the returned illumination light, and the imaging optical system being adjusted to focus on a point near a surface of the lens; an image processing device adapted to process an image signal from -the- imaging device to detect at least one of a mark point provided on a unifocal lens, a small lens portion of a bifocal lens, and a progressive mark provided on a progressive focal lens and obtain a position of the detected one; and an arithmetic control device adapted to determine an attaching position of the cup based on the position obtained by the image processing device.
Abstract:
An aspherical surface processing method involves a workpiece to be processed by rotating around a rotation axis, and a rotational tool movable relative to the workpiece in the same direction as the rotation axis of the workpiece and in a direction perpendicular to the rotation axis of the workpiece. The rotational tool is shifted in a fixed direction with a predetermined feed pitch in a partial or entire region from a center of the rotation axis of the workpiece to a periphery of the workpiece in the direction perpendicular to the rotation axis of the workpiece to process the workpiece into a non-axisymmetrical and aspherical surface.
Abstract:
A multifocal or bifocal contact lens is made on a convention radius turning lathe has two supports, one for the work or lens blank and the other for the tool. The tool is rotated about an axis fixed on its support so that the point of the tool describes a circle. The blank is held fixed on its support. Upon relative angular movement of the supports, a spherical segment is cut in the blank, with the center of curvature falling along the axis of rotation of the tool whereby monocentricity is achieved. By such grinding technique, a segment for near view may be formed having a desirable configuration in which nasal rotation of the lens is noncritical.
Abstract:
MULTIFOCAL LENS FORMED OF ONE-PIECE MOLDED OR PRESSED MENISCUS LENS BLANKS. AN OPTICALLY FINISHED SURFACE OF A CURVTURE DESIRED FOR NEAR-VISION FIELDS OF THE LENSES IS PRODUCED ON A SUBSTANTIAL PORTION OF ONE UNFINISHED SIDE OF EACH OF A NUMBER OF THE BLANKS WITH A STRAIGHT CLIFF-LIKE LINE OF DIVISION SEPARATING THE OPTICALLY FINISHED AND UNFINISHED PORTIONS OF SAID SIDES OF THE BLANKS. WITH REFERENCING FROM THE FINISHED PORTION OF THE BLANKS, THEY ARE MULTIPLY BLOCKED AND REVOLVED WBOUT AN EXIS RADIALLY SPACED FROM THEIR FINISHED PORTIONS A DISTANCE EQUAL TO RADIAUL OF CURVATURE DESIRED UPON THE UNFINISHED PORTIONS LESS AN AMOUNT EQUAL TO A PRACTICAL MINIMUM OF HEIGHT TO WHICH THE CLIFF-LIKE LINES OF DIVISION ARE TO BE REDUCED. GRINDING AND POLISHING TO THE MINIMUM HEIGHT OF THE LINES OF DIVION DURIG SUCH REVOLUTION FINISHES THE BLANKS. BLOCKING IS PERFORMED WITH AN ALIGNING AND HOLDING FIXTURE WHEREIN THE BLANKS ARE SUPPORTED BY THEIR NEAR-VISION FIELDS.