Ophthalmic lenses - Curve GeneratorsMetal- and electroplated bonded and vacuum-brazed grinding wheels used to generate curves on mineral (glass), CR39, polycarbonate and Trivex lenses, or any other type of organic lens. Latest-generation equipment uses PCD cutters or PCD tools to mill organic lenses. These are high-precision, high-durability sharpenable tools. Ophthalmic lenses - Pellets and padsMetal- or resin-bonded diamond pellets of various sizes and grains are used to finish lenses as an intermediate stage between prior coarse grinding and posterior polishing with felts and cerium oxide. In many processes, pellets are being replaced with flexible metal-bonded pads that offer greater versatility Ophthalmic lenses - Peripheral grinding wheelsCoarse-finishing, fine-finishing and polishing grinding wheels (mineral and organic) used to bevel ophthalmic lenses. These are high-precision, high-durability tools able to bevel at 35 m/s in modern high-speed machines. Edge-finishing grinding wheels are also used to achieve a perfect lens bevel. In some manual machines, super-fine peripheral grinding wheels are also used to hand-finish lenses. Ophthalmic lenses - Grooving discsThese cutting discs are used on the edge of the lens to insert nylon or steel thread. The widths vary between 0.5 mm to 1.2 mm and they are available in metal- or electroplated bonded versions. Ophthalmic lenses - Flat-Finishing Grinding WheelsThese are 2- or 3-band grinding wheels, available with or without bevel, and are used to hand finish lenses. Some of these grinding wheels also include a super-finishing cone in the centre. Ophthalmic lenses - Cleaning SticksThese aluminium oxide sticks are used to clean grinding wheels as, with use, wheels can become clogged and so lose their cutting power. Simple maintenance of diamond grinding wheels ensures cutting power is maintained and productivity increases. |
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Ophtalmic lenses
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