Hi, this is my first post on the board.
I am looking for a guide to how much thinner a typical 1.53 or 1.6 index AS SV plus lens is than standard CR39. This is to help dispensers I work with who have very little experience in this area.
I can appreciate it can only be calculated if I know several proprietary variables and exact blank size, but I wonder if there is some kind of rule of thumb? Something like the approximate sag formula but for plate height in an aspheric?
Thanks,
Jonathan
How much flatterare aspheric lenses?
I am looking for a guide to how much thinner a typical 1.53 or 1.6 index AS SV plus lens is than standard CR39. This is to help dispensers I work with who have very little experience in this area.
I can appreciate it can only be calculated if I know several proprietary variables and exact blank size, but I wonder if there is some kind of rule of thumb? Something like the approximate sag formula but for plate height in an aspheric?
Thanks,
Jonathan
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