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How can optical glass not produce stripes?

Popularity:      Date: 2017/4/6 13:27:30

The streaks of ordinary glass occur primarily because of inhomogeneous material; the corrosion of refractory materials (the primary introduction of Al); the agitation produced in the manufacture of glassware.

Therefore, optical glass from these aspects, the raw materials request purity >99%, impurities are less than one hundred thousand points, as well as the size of the material, the scale has a high request. The furnace are adopted ceramic or platinum as refractory. Usually only casting method, rolling method, broken cylinder method and liquid method are adopted to effectively avoid the agitation of glass during forming.

optical glass

The other is constructed furnace and daily glass furnace is not the same, it is divided into molten pool (feeding), conditioning pool (conditioning melting atmosphere), the essence of the pool (Nong Qing), (Ban He), a large pool of furnace output is usually only 5 tons.

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