| 摘要 |
<p>A method for producing an optical glass exhibiting a stabilized quality while preventing deterioration of a burner being used for synthesizing fine glass particles composing the optical glass. An optical glass in which the number of residual bubbles having a diameter of 0.3 mm or above is not larger than 0.005 pieces/cm3 (per volume) is provided. Such an optical glass is produced by regulating the flow velocity or the flow rate of a combustible gas or a combustion assisting gas during deposition of fine glass particles thereby controlling the end face temperature of the burner for synthesizing glass.</p> |
