A system and method for blocking light

摘要

A system (1) and method serves for blocking light or thermal energy passing through an opening (3). The light-blocking system (1) comprises a length-adjustable screen (5) having a first face (12a) and a second face (12b) interconnected at a distance from each other by means of a spacer means (14), a frame (2) bordering at least a part of the opening (3), and means for blocking light passing through a gap between at least one lateral edge (16) of the length-adjustable screen (5) and the frame (2), which means for blocking light passing through said gap comprises at least one slot (17) extending inside the length-adjustable screen (5) between the first plane (13a) and the second plane (13b) from at least one free lateral edge (16) of the length-adjustable screen (5), and a longitudinal key means (6) protruding from the frame (2) inside the opening (3) opposite the at least one slot (17) and configured to engage said at least one slot (17). The key means and the slots engages to prevent passing of light as well as light reflections does not occur.