| 摘要 |
<p>Production of large volume optical components from synthetic quartz blanks involves heating the blank to its softening point for shaping within protective atmosphere and heating blank slightly over its softening point, while pressure is applied over its whole surface area at a level of 10-500 kPa while the blank temperature is maintained. To produce large volume optical components with a high optical quality, from synthetic quartz blanks, the blank is heated to its softening point for shaping within a protective gas atmosphere of nitrogen or argon. The blank is heated to a level only just over its softening point, while pressure is applied over its whole surface area at a level of 10-500 kPa while the blank temperature is maintained. The molds (2, 3) for the quartz blanks (4, 5) are on a base plate (6) of the press assembly (7). Vertical columns (9, 10) guide the moving press plate (8) when under pressure (14), to bring the lower surface (13) of the plate against the outer surfaces (11, 12) of the blanks for compression into the molds.</p> |
