This is a typical optical thin film found in daily living.

This is a reflection prevention film that decreases reflective light on the lens surface and increases permeated light.

Other than multi layer film, 2 layer film, which a specific wavelength is used for MgF2 single layer film or optical pick up.

Low reflection is required if there are many lenses configured.

Coating is done at low temperature for plastic products.

Heterogeneous film may be used to extend the area.