| 摘要 |
A method and apparatus for protecting removable markings (12) on an optical lens (10) during grinding thereof to a desired prescription. A mask (18) is placed over the markings prior to application of an adhesive tape (20), to which a low temperature alloy block (24) is bonded for holding of the lens during grinding. The mask preferably covers only the markings, and is transparent to allow alignment thereof. Preferably the mask is held in place on the lens surface without the use of an adhesive although a low tack adhesive may be used which does not remove the markings when the mask is peeled away from the lens. A preferred material for the mask is a static cling vinyl.
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