VIMFUN / KNOWLEDGE CENTER

Optical Manufacturing Knowledge Center

Practical guides to optical cutting, grinding, polishing and inspection—from material selection to process troubleshooting.

A Φ14 mm germanium blank cut on a conventional coring machine leaves a 5–10 mm kerf ring — that’s often more material wasted than the lens itself weighs.

A 200 mm germanium ingot costs $6,000–$10,000 at current spot prices. Traditional core-drilling wastes 5–10 mm of material per blank cut; diamond wire saw cutting reduces that kerf

After cutting and centering, a germanium blank is flat — a disc with parallel surfaces, correct diameter, and clean edges. But a flat disc is not a lens.

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