Glass & Rubber Industries

Uneven Lens Coating

Lenses are coated by methods such as spin coating, vacuum deposition, or ion plating. If the lenses are charged with static electricity in the drying or transfer process, the coating will not be applied uniformly, resulting in uneven coating.

Uneven Lens Coating

Conventional countermeasures


  • There is a risk of delivering defective products that were overlooked during inspection.
  • Lenses with defective coating should be discarded, which increases disposal cost.

Countermeasures with static eliminators (ionizers)

An ionizer reduces the risk of complaints and decreases disposal costs.

Countermeasures with static eliminators (ionizers)

Improvements and Effects
Words from the worksite

Reduced costs for addressing complaints

Costs for addressing complaints (recall cost, on-site service travel cost, addressing cost): $30,000/year

Since customer complaints will affect subsequent business, it was crucial to improve the matter.