LIGHT DIFFUSING-NONDIFFUSING WINDOW

摘要

A window-like arrangement comprises two panes with a cavity between them. Liquid can be caused to flow into the cavity between the two panes in order to come into contact with an element having an irregular surface which, in the absence of the liquid diffuses light, and when the liquid is disposed between the panes, owing to agreement between the refractive indices of the element and the liquid, the diffusing action ceases.