Photoradiator including light control device

A photoradiator for adjustably radiating solar light propagating therethrough in a desired direction and a desired quantity to the ambiance, comprising a first and a second cylindrical light conducting means axially aligned along a longitudinal axis and each having an outer cylindrical wall, said first cylindrical light conducting means having a first longitudinal end section, said second cylindrical light conducting means having a second longitudinal end section, one of said longitudinal end sections having a flat end wall, the other of said longitudinal end sections having a transverse recess extending generally transversely to said longitudinal axis, and a transparent adjustable control member disposed in said recess for movement in a direction generally transversely of said longitudinal axis, said control member having a flat surface and an inclined surface, solar light being propagated through said first cylindrical light conducting means and transmitted to said second cylindrical light conducting means via said flat surface on said control member while the rest of the solar light being propagated is partly transmitted through said inclined surface into said second cylindrical light conducting means and partly reflected laterally outwardly to the ambiance by said inclined surface, the amount of said light tranmitted to said second cylindrical light conducting means and the amount of said light reflected laterally outwardly to the ambiance being controlled by the adjusted position of said adjustable control member in said recess.

A photoradiator for adjustably radiating light transmitted therethrough in a desired direction and a desired quantity to the ambiance, comprising a first and a second cylindrical light conducting means axially aligned along a longitudinal axis and each having an outer cylindrical wall, said first cylindrical light conducting means having a first longitudinal end section, said second cylindrical light conducting means having a second longitudinal end section, one of said longitudinal end sections having a flat end wall, the other of said longitudinal end sections having a transverse recess extending perpendicular to said longitudinal axis, and a transparent adjustable control member movably disposed in said recess in a direction perpendicular to said longitudinal axis, said adjustable control member having two parallel flat surfaces perpendicular to said longitudinal axis and two converging inclined surfaces disposed at an acute angle relative to said longitudinal axis, one of said two flat surfaces having a length in a direction perpendicular to said longitudinal axis which is less than the corresonding length of said other flat surface such that light propagating through said first light conducting means is transmitted to said second light conducting means via said one flat surface on said control member while the rest of the light being propagated through said first light conducting means is partly reflected laterally outwardly in two different directions by said two inclined surfaces and partly transmitted through said inclined surfaces into said second light conducting means, the amount of said light transmitted to said second light conducting means and the amount of said light reflected laterally outwardly being controlled by the adjusted position of said adjustable control member in said recess, said two inclined surfaces reflecting back light in said second light conducting means in that light from the second light conducting means is initially reflected transversely by one of said inclined surfaces to said other inclined surface and thence back into said second light conducting means.