The hindwings are pale smoky with lighter silky fringes.

His face was serious, and, seemingly, displeased, a light fringe hanged over his eyes.

The hindwings are deep smoky with somewhat lighter fringes.

Some fine examples of white light fringes can be seen here.

The hindwings are dingy grey or brown with lighter fringes.

The hindwings are also rust brown, with lighter fringes.

Then some known light structure, for example a set of light fringes that is also within the passband, is superimposed on the target.

The hindwings are fuscous with a long, light fuscous fringe.

Replies: The light fringes are caused by variations in the thickness of the bubble film.

Interference between the beams results in a pattern of dark and light fringes throughout the crystal.