摘要:
[Problem to be Solved] A displacement prevention coating agent is provided which can prevent a displacement in lens processing, which is soluble in water and which exhibits a transparent appearance at least after being cured. [Solution] There is provided a displacement prevention coating agent with which the front and rear surfaces of a lens are coated so that when cutting processing is performed on an end surface of the lens where, for example, a water-repellent coat layer is formed as a membrane such that the end surface has a shape corresponding to a frame, a holding position of the front and rear surfaces of the lens held by a chuck device is prevented from being displaced, where the displacement prevention coating agent is formed of an aqueous solution whose main components are a hydrophilic resin, a surfactant having a perfluoro group and an emulsion and exhibits a transparent appearance at least after the formation of the membrane. Such a displacement prevention coating agent is used when the front and rear surfaces of a lens where for example, a water-repellent coating layer is formed as a membrane are chucked and held with a chuck device to which an adhesive tape is adhered, and thus when the lens is processed, a holding position held by the adhesive tape of the lens is unlikely to be displaced.
摘要:
Methods, systems, and devices for lathing parts, including lenses such as ophthalmic lenses. In some embodiments a reference surface is machined into a workpiece. In some embodiments the methods include machining first and second surfaces of a lens so that they have the same centerlines.
摘要:
A device (10) for blocking workpieces comprises an aligning station (11), which has a workpiece support (12), for aligning a workpiece laid on same, a block station (13) comprising a block piece mount (14), in which block station the aligned workpiece can be blocked by means of a block material on a block piece, which can be mounted in the block piece mount in a centred manner in relation to a substantially vertically extending blocking axis (V), and a workpiece carriage (16) which carries a holding head (15) for the workpiece and which is suitably guided and driven, by means of which workpiece carriage the workpiece held on the holding head can be transported from the aligning station to the block station, can be positioned along the blocking axis in a defined manner relative to the block piece held in the block piece mount and can be held between workpiece and block piece during blocking in the defined relative position to the block piece by leaving a gap between block material and mount. In this way, the aligning station can be moved from a resting position, in which same does not prevent movements of the workpiece carriage, into a working position, in which the workpiece support is centred with respect to the blocking axis, and vice versa.
摘要:
Die Erfindung betrifft ein Werkstück (1) aufweisend einen optischen Linsenrohling (10) mit einer ersten Linsenfläche (11) und einer zweiten Linsenfläche (12), die sich gegenüberliegend angeordnet und an einem Linsenumfang (13) begrenzt sind, und eine Abdeckfolie (20) auf der ersten Linsenfläche (11), wobei eine erste Ausnehmung (14) im Linsenrohling (10) ausgebildet ist, die in Richtung der ersten Linsenfläche (11) offen ausgestaltet ist, und die zumindest teilweise in Richtung der ersten Linsenfläche (11) durch die Abdeckfolie (20) überspannt ist. Außerdem betrifft die Erfindung ein Verfahren zu dessen Herstellung und eines zu dessen Bearbeitung. Das Bearbeitungsverfahren zeichnet sich insbesondere durch ein Greifen der Abdeckfolie zum Zwecke des Abziehens in dem Bereich aus, der die erste Ausnehmung (14) überspannt.
摘要:
Disclosed is a method for determining location of a lens machining tool (24) having an offset location according to a first direction (Y) smaller than a first predetermined threshold, including the steps of manufacturing a calibration piece (10) according to a predetermined theoretical geometry by using the lens machining tool for providing a at least partially annular groove in a main surface of the calibration piece, the at least partially annular groove being configured to form at least one sharp edge defining a slope discontinuity on the main surface; measuring a distance between the at least one sharp edge and a turning center of the calibration piece for providing data of geometrical characteristics of the calibration piece; and deducing from the measured data a location of the lens machining tool according to a second direction (X) distinct from the first direction.
摘要:
The invention relates to a method for viewing at least one marking of at least one ophthalmic lens (1) within a spectacle frame, in which: said lenses (1) are arranged between at least one light source (4) and a display screen (6); at least one light beam is emitted from said light sources (4) and at least one associated collimation lens (5) towards said display screen (6) through at least one of the lenses (1); said display screen (6) and/or said light sources (4) are moved, according to the circumstances, substantially orthogonally to the direction of said light beam; the collected beams are viewed on said display screen (6).
摘要:
Eine Vorrichtung (10) zur Bearbeitung eines Rands (E) eines Rohlings für eine Linse (L), insbesondere Brillenlinse, umfasst eine Aufnahmeeinrichtung (12) zum Halten des auf einem Blockstück (S) geblockten Linsenrohlings in einem Arbeitsraum (14) der Randbearbeitungsvorrichtung, eine Bearbeitungseinrichtung (16), mittels der ein Werkzeug (W) für die Bearbeitung des Rands antreibbar ist, und eine Bewegungseinrichtung (18) zum Erzeugen einer Relativbewegung zwischen Linsenrohling und Werkzeug während der Bearbeitung des Rands in dem Arbeitsraum. Zur Vereinfachung und Verbesserung des Handlings im Zusammenhang mit dem Abblocken der behandelten, insbesondere am Rand bearbeiteten Linse weist die Randbearbeitungsvorrichtung eine Abblockeinrichtung (20) auf, mittels der die Linse im Arbeitsraum vom Blockstück abblockbar ist. Außerdem wird ein Herstellverfahren für Brillenlinsen vorgeschlagen, dessen Abblock-Hauptschritt einen Einstech-Unterschritt umfasst, bei dem ausgehend von der Randfläche des Blockstücks angrenzend an oder nahe einer ersten Fläche der Linse ein Einstich erzeugt wird, der beim weiteren Abblocken als Solltrennstelle zwischen Brillenlinse und Blockstück dient.
摘要:
The present invention relates to a process of edging a lens comprising forming a lens-protective transparent coating layer on the surface of the lens. When the lens coated with a transparent coating layer comprising a fluorine-containing elastomer and optionally a fluorine-containing organosilane compound and having a surface energy of less than 15 mJ/m2 is edged, the scratch of lens during handling, the damage of lens caused by chemical contaminants, and lens off-centring phenomena can be prevented. Further, such an edging process requires no adhesive tape, making the process simple, and prevents the contamination of the lens surface. Further, the inventive transparent coating layer makes it possible to measure the diopter of lens exactly owing to its transparency and it is manually removable without a chemical.
摘要翻译:本发明涉及一种在透镜表面上形成镜片保护性透明涂层的镜片加工方法。 当涂覆有包含含氟弹性体和任选的含氟有机硅烷化合物并具有小于15mJ / m 2的表面能的透明涂层的透镜被边缘化时,在处理期间镜片的划痕,造成的镜片损坏 通过化学污染物,可以防止镜片离心现象。 此外,这种边缘处理不需要胶带,使得该工艺简单,并且防止了透镜表面的污染。 此外,本发明的透明涂层使得可以精确地测量透镜的屈光度,并且其可手动地移除而不用化学品。
摘要:
The invention relates to a holder (1) for pneumatically blocking an optical lens (300) on a surfacing machine, comprising: - a gripping part (10) for fixing it to a corresponding member (200) of said surfacing machine, and - a part (100) for blocking said optical lens, which comprises a body (110) from which there protrude abutments which are designed to afford the optical lens a rigid seat, and a seal (170) against which the optical lens is able to be brought to bear in order to delimit with said body a vacuum chamber (180). According to the invention, said abutments comprise first rods (160) which are mounted so as to be movable in translation with respect to said body in order to bear by way of their free ends (161) against the optical lens, and provision is made of return means (179, 190) for returning said first rods against the optical lens.