High-end metal mould kernel
The spectral optical company lasted more than a year of research and development, the original will be "super precision high-end nanoscale complete sets of processing equipment + + optical polishing process + free surface optical design, optical detection process", the combination of the successful design of the original series of injection molding process, used to manufacture polycarbonate (PC), nylon PA, acrylic PMMA to the lens material such as high-end metal mould kernel products.
NO. 3 type with progressive metal mould inside the kernel
Progressive piece of one of the most important design goal is to provide high quality with vision area. Type with progressive metal mould inside the kernel provides the wearer with high quality nearly with vision, almost with area was extended, and nearly use area near the astigmatism is reduced, which make the wearer more comfortable when using nearly with area. Can design all around the eye, can also be designed around the eye eccentric. ADDS range: ~ + 4.00 + 0.50 D D; Ball photometric + / - 0.05 D, check points astigmatism + / - 0.05 D; Less than 10 nanometers, surface finish of metal mould kernel without an orange stripes and pitting.
With progressive metal mould kernel type