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Top Coat

Top coats make lenses easy to clean, smooth, hydrophobic and oleophobic, repelling dirt and water. The quality of a hydrophobic top coating is measured by the contact angle of a water drop on a lens. A higher contact angle (roundness of the water drop) indicates better hydrophobicity. The newest generation of top coatings has water contact angles over 110°, and also repels oil for example from human skin (fingerprints). This property is referred to as oleophobicity and is measured by the Dynamic Oil Contact Angle.

To apply Hydrophobic, Super Hydrophobic or Super Hydrophobic & Oleophobic top coats, Satisloh offers different materials (chemicals & recipes) that can be applied either directly inside the AR vacuum chamber or in a separate vacuum chamber.

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Hydrophobic

Typical: 97° - 104° water contact angle.
Satisloh Top Coat Material: Cleanvac.

A higher contact angle (roundness of the water drop) indicates better hydrophobicity.

Super Hydrophobic

Typical:  over 106° water contact angle.
Satisloh Top coat material: Aulon.

A higher contact angle (roundness of the water drop) indicates better hydrophobicity.

Super Hydrophobic & Oleophobic

Typical: over 110° water contact angle & dynamic oil contact angle.
Satisloh Top coat material: Satin.

Grip* phased hydrophobic: A sacrificial overcoat applied on top of Satin solves the slippage problem when edging super-hydrophobic lenses. Grip can be wiped off after edging. *not available in all countries.

A higher contact angle (roundness of the water drop) indicates better hydrophobicity.

Equipment

 Satisloh 1500-X Clear AR and sun lens box coater

1500-X

High throughput vacuum box coater for clear AR and sun lenses. Processes up to 305 lenses/batch.

Satisloh 1200-DLX-2 AR coating machine for ophthalmic lenses

1200-DLX-2

High volume vacuum box coater for AR & mirror coatings. Processes up to 245 lenses/batch.

Satisloh MC-380-X lens box coater

MC-380-X

Compact mid-volume vacuum box coater for AR & mirror coatings. Processes up to 60 lenses/batch.

Satisloh MC-280-X AR & Mirror Coating Machine

MC-280-X

Standalone small vacuum box coater for AR & mirror coatings. Processes up to 30 lenses/batch.

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