Optical Element Comprising Restrained Asymmetrical Diffuser

摘要

The present invention provides an optical element having an optical film, the optical element comprising a support frame having a shaft therein, the support frame being provided around a perimeter of the optical element and the optical film having slots on a periphery thereon, the periphery of the optical film being provided on the support frame. The invention further provides a pin provided in each of the slots and protruding into the support frame and slidable on the shaft by a controlled tensile force and a spring mechanism that is slidable on the shaft for providing the controlled tensile force to the optical film, wherein the optical film is an asymmetric diffuser.