초록 ▼

This invention provides a light transmitting assembly that can, at will, be changed from a state of transparency to one of translucency. It comprises two parallel spaced apart panes of transparent material, such as glass, with a film of polytetrafluoroethane, which is inherently translucent or opaqu

This invention provides a light transmitting assembly that can, at will, be changed from a state of transparency to one of translucency. It comprises two parallel spaced apart panes of transparent material, such as glass, with a film of polytetrafluoroethane, which is inherently translucent or opaque, disposed between. The assembly is rendered transparent by introducing a fluid into the assembly to substantially cover a surface of the film; the fluid having a refractive index corresponding to the refractive index of the film. The translucency is restored by removing the fluid.

대표청구항 ▼

A light transmitting assembly comprising parallel spaced apart panes of transparent material with a film of polytetrafluoroethylene affixed between said panes, means to substantially coat at least one surface of said film with a fluid having a refractive index approximately equal to that of said fil

A light transmitting assembly comprising parallel spaced apart panes of transparent material with a film of polytetrafluoroethylene affixed between said panes, means to substantially coat at least one surface of said film with a fluid having a refractive index approximately equal to that of said film to render said film transparent and means to remove said fluid.