| 摘要 |
A method for manufacturing a preferably asymmetrical lens element ( 5 a) from a tempered blank ( 1 ) is characterized by: producing the lens element ( 5 a) from a first partial volume ( 1 a) of the tempered blank ( 1 ), whose thickness d is less than approximately 70%, preferably less than approximately 60%, particularly preferably less than approximately 50% of the thickness D of the tempered blank ( 1 ). Preferably, from a second partial volume ( 1 b) of the tempered blank ( 1 ) at least a further lens element ( 5 a') is produced, wherein before the lens elements ( 5 a, 5 a') are produced the tempered blank ( 1 ) is divided into the first and second partial volume ( 1 a , 1 b).
|
