The light interference phenomenon
7 May 2018
The light interference phenomenon, called Brewster stripes, appears in the insulated glass when:
- they are made of glasses with very small thickness difference, fitting in to the interval from 400 to 700 nm, this is the wavelength of the white light. Used in the insulated glasess float glass is characterized by the small difference in thickness, what is its greatest values. Using the float glass in the insulated glass may lead to the appearance of the light interference. In drawn glass, manufactured with Pittsburgh method, the differences in thickness are remarkably bigger than in float glass, therefore the light interference is almost unexistant.
- When there is a small angle between the two tiles at the same time, this is when the difference in the parallel of the tile is of 400 to 700 nm. In the practice, the difference in barely noticeable and does not influence the characteristics of the insulated glass. However, when both requirements described above are fulfilled, the light interference appears in the firm of wide spots, lines or rings, situated on the surface of insulated glass. This phenomenon is more noticeable when You look at the glass from the angle.