| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent the transformation of a glass component by the annealing of an optical glass member in a non-oxidizing gas atmosphere. <P>SOLUTION: In the heat-treatment method of an optical glass member performed for a glass optical member 30 which is obtained by a heat-forming method, heat-treatment is performed in an atmosphere of a non-oxidizing gas such as nitrogen gas (N<SB>2</SB>). <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
