Large spherical
polishing
（Length
132mm × width 65mm）
Metal Mirror
polishing
16 cavities tooling
of lens
Surface roughness
meet 2∼3nm
Used in the OPU of
R/W DVD Rom of lens
has 16 cavities, and
aspheric surface
shape accuracy
requirements less
than 1μ, and each
cavity all meet
specification at
molding injection
