Optical element wit foil held by underpressure, method of manufacture, and display unit with such element

摘要

An optical element for a display unit comprising a first rigid, transparent plate (9b) and at least one flexible optical foil (5), wherein the foil (5) is held to the plate (9b) by means of an underpressure created, for example, by a suction device (17). ;The optical element according to the invention overcomes the problem of wrinkling foils by creating an underpressure that presses the foil (5) against the rigid plate (9b), thereby preventing the foil from wrinkling. ;According to an embodiment of the invention, the optical element further comprises a second rigid, transparent plate (9a), said optical foil is arranged between the first and second plates, and the plates (9a, 9b) are held together by means of underpressure.