The disadvantage of this material is its low optical thickness, as it is a surface treatment.

Optical depth, or optical thickness, is a measure of transparency.

In transmission mode, the phase shift image provides a label-free quantitative measurement of the optical thickness of the specimen.

Indeed, due to optical interference, a correlation exists between RGB (red, green, blue) parameters of the sample and its optical thickness.

Thus, its nearly flat spectrum on the top with steep sides is due to the effect of optical thickness on the bremsstrahlung spectrum.

This makes it possible to calculate optical thickness of the micro-object in every point.

Some of the knots do exhibit well-developed tails which are often detectable in optical thickness from the visual spectrum.

The product of both defines the optical thickness of the layer: n - d.

A change in the optical thickness results in a modulation of the interference spectrum.

The net effect should be a reduced optical thickness for outgoing infrared radiation and a reduced cloud lifetime.