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US 6,629,435 B2Granted
Method of forming an optical glass element
AssigneeMinolta Co., Ltd.
InventorToshiya Tomisaka
Life of this patent
Estimating the term…
Abstract
A method for forming an optical glass element by pressure molding a glass pre-form using top and bottom molds, has steps of heating a glass pre-form held at a position separated from the top and bottom molds by a holding member within the top and bottom molds, pressing the glass pre-form while the glass pre-form is held by the holding member, and moving the bottom mold independently in an upward direction and pressing the glass pre-form again.
Claims12
A method for forming an optical glass element by pressure molding a glass pre-form using top and bottom molds, comprising:
- heating a glass pre-form held at a position separated from the top and bottom molds by a holding member within the top and bottom molds,
- pressing the glass pre-form while the glass pre-form is held by the holding member, and
- moving the bottom mold independently in an upward direction and re-pressing the glass pre-form.
A method for forming an optical glass element comprising:
- heating a glass pre-form held at a position separated from the top and bottom molds by a holding member within the top and bottom molds,
- applying pressure to the glass pre-form while the glass pre-form is held by the holding member, and
- moving the bottom mold independently in an upward direction and pressing the glass pre-form.
Dependencies are inferred from the claim text.