THE WORD DICHROIC IS GREEK: “DI” MEANS TWO “CHROIC”MEANS COLOR,
WHEN MORE THAN TWO COLORS ARE OBSERVED THE PHENOMENA IS KNOWN AS PLEOCHROISM.

The technical definition of dichroism is an optical effect observed in crystalline materials,
In which two different colours are viewed in different directions.
Originally develop in the 1960’ as interference filters for use with lasers,
Dichroic glass is a product of the technology called thin film physics.
The coatings are made with molecular films of metal
(primarily titanium, silicon, magnesium oxides) shuffled into multiple layers.
The types of the metals and the order in which they are deposited are factors that determine
The colours of the reflected light. The colours of the reflected light in the same instance can be called wave-lenghts.
That we perceive as a colour in the elements is the light not absorbed,
Normally we see the light that is not absorbed: the reflected light,
The reflected light is just the colour that we see.
Instead in the Dichroic Art Glass it’s completely different;
It is made from materials that are completely transparent, meaning that they do not absorb light energy in the visible spectrum , the process causes the glass to became a partial mirror,
Dichroic glass select and reflects away certain wave lengths of light and allows the remaining wave lengths to transmit through.
This is the same way the nature created the butterfly wings , the bird feathers, fish scales, scarabeo wings and even the colours seen on a oil slick of water.
As the light rays transmit through the glass at a right angle they are les effected by refraction than when passing at an extreme off axis angle where they have to travel a greater distance causes a shift of colours and when dichroic glass is wieved at even slightly different angles, you will see differing colours.