摘要:
Ophthalmic lens wafers for forming a composite lens are provided wherein each front lens wafer (16, 16') has a front registration pattern (18, 20, 18', 20') formed on its peripheral edge, and each back lens wafer (22, 22') has a back registration pattern (24, 26, 24', 26') formed on its peripheral edge which is different than the front registration pattern. Each registration pattern is oriented at a predetermined angle relative to any respective optical axis for facilitating alignment of such axes in accordance with a particular prescription. A receiver (10, 110, 210) for holding and registering the ophthalmic lens wafers defines at least one registration pattern which matches the registration pattern of either a front or back lens wafer, but not both. The registration pattern of the receiver may be formed by key pairs (28), recessed surface areas (128), and/or retractable switches (228) which are shaped and positioned relative to each other to mesh with a respective lens registration pattern.
摘要:
Ophthalmic lens wafers for forming a composite lens are provided wherein each front lens wafer (16, 16') has a front registration pattern (18, 20, 18', 20') formed on its peripheral edge, and each back lens wafer (22, 22') has a back registration pattern (24, 26, 24', 26') formed on its peripheral edge which is different than the front registration pattern. Each registration pattern is oriented at a predetermined angle relative to any respective optical axis for facilitating alignment of such axes in accordance with a particular prescription. A receiver (10, 110, 210) for holding and registering the ophthalmic lens wafers defines at least one registration pattern which matches the registration pattern of either a front or back lens wafer, but not both. The registration pattern of the receiver may be formed by key pairs (28), recessed surface areas (128), and/or retractable switches (228) which are shaped and positioned relative to each other to mesh with a respective lens registration pattern.
摘要:
A three-axis, computer controlled apparatus (10) for edging optical lenses maps the surfaces of a lens blank (L) along a path defining the shape of the lens to be cut from the lens blank and from which mapping a computer controlled cutting algorithm directs the movement of the lens in the R, Z and theta axes direction. The apparatus (10) provides rough cuts, finished cuts and automatic placement of bevels and grooves along the edge of the lens with minimal operator intervention.
摘要:
Un appareil à trois axes commandé par ordinateur (10) pour tailler des lentilles optiques trace les surfaces d'un flanc de lentille (L) le long d'un chemin définissant la forme de la lentille à tailler à partir du flanc. En fonction desdites traces, un algorithme de découpage commandé par ordinateur dirige le mouvement de la lentille dans les sens R, Z et thêta. L'appareil (10) réalise des grosses tailles, des tailles finies, et effectue le placement automatique de biseaux et de rainures le long du bord de la lentille tout en assurant une intervention minimale de l'opérateur.
摘要:
An apparatus (10) is provided for making ophthalmic lenses by vacuum lamination wherein a front lens wafer (20) is laminated to a back lens wafer (22) with a layer of adhesive (24) disposed within the interface between the two wafers forming a composite lens (18). An upper flexible, transparent sheet (12) is located on the top side of the composite lens (18), a lower flexible, opaque or transparent sheet (14) is located on the bottom side of the composite lens, and an approximately air-tight enclosure (16) is formed between the sheets for receiving the composite lens. A vacuum pump (36) draws the upper and lower flexible sheets into engagement with the composite lens to press the wafers together. A UV lamp (38) transmits radiation through the upper flexible sheet (12) and into the adhesive layer to cure the adhesive and form the composite lens (18).