Borate lanthanide optical glass

Abstract

The invention relates to a borate lanthanide optical glass, belongs to the technical field of borate lanthanide optical glass, and provides a borate lanthanide optical glass which adopts B2O3, La2O3, Nb2O5 and ZnO as main components, does not contain harmful substances comprising Pb, Th, Cd, Hg, As, Cr or F, and does not contain a near-infrared absorption component Yb2O3 or an expensive raw material Ta2O5. The refractive index (nd) and the Abbe number (nud) of the optical glass are 1.82-18.4 and 35-39 respectively. Results of tests carried out according to a GB / T17129 method show that the grade of water durability (DW) of the optical glass is 1, and the grade of the acid durability (DA) of the optical glass is 3 or more. The optical glass comprises 3-6wt% of SiO2, 15-25wt% of B2O3, 20-40wt% of La2O3, 2-5wt% of ZrO2, 5-10wt% of Nb2O5, 20-30wt% of ZnO, 3-8wt% of WO3, 1-4wt% of TiO2, 0-5wt% of Gd2O3 and 0-1wt% of Sb2O3. The optical glass provided in the invention has the advantages of low costs of the above raw materials, good chemical stability, and low crystallization tendency, so batch production of the optical glass can be easily realized.

Description

technical field

[0001] The present invention relates to a kind of B 2 o 3 , La 2 o 3 , Nb 2 o 5 , ZnO as the main component, does not contain harmful substances such as lead, thorium, cadmium, arsenic, mercury, chromium, fluorine and expensive Ta 2 o 5 The optical glass specifically relates to a borate lanthanide optical glass with a refractive index (nd) between 1.82-1.84 and an Abbe number (υd) between 35-39. Background technique

[0002] With the fierce competition and development of the optoelectronic product market, manufacturing optical materials with high yield and low cost is the goal of every optical material manufacturer. On the other hand, in recent years, digital cameras, digital video cameras, camera phones, etc. have become increasingly popular, and the degree of integration and functions of mechanical devices used in optical systems have increased rapidly. In this case, the optical system is required to achieve higher accuracy and reduce the weight and...

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