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Optical glass

Mar 2007
Sumita Optical Glass Inc.Request Info
The K-PSFn214 optical glass for precision molding from Sumita Optical Glass Inc. features an index of nd 2.14352/vd 17.8, which is higher than that of the company’s K-PSFn2 (nd 2.00170/vd 20.6). It also offers improved transmission over the conventional glass. Its yielding point is 449 °C, its thermal expansion is 98 x 10–7 °C–1, and its specific gravity is 7.06. Its molding temperature is approximately 470 °C, which is suitable for workability and extended life of the die. Designing optical devices in high-index materials enables the downsizing of optical equipment and wide-angle lenses for digital cameras. The glass has applications in medical equipment.


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optical glass
A glass that, during manufacture, is carefully controlled with respect to composition, melting, heat treatment, and other processing, to render its optical characteristics, such as its index of refraction, dispersion, transmittance, spectral transmittance, homogeneity, freedom from birefringence, permanence, etc., sufficient for its optical application.
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