Device for limiting transmitted optical performance in optical device, has control sensor determining light intensity of partial surfaces of protection element, where portion of surface of protective element is divided into partial surfaces

摘要

The device has a first focusing element (21) whose input is coupled to an output of a spectral resolution element (11). An input of a protection element (30) is coupled to the output of the spectral resolution element. An input of a second focusing element (22) is coupled to an output of the protection element. A portion of a surface of the protective element is divided into multiple partial surfaces whose optical properties are influenced by an electrical signal. A control sensor (60) determines light intensity of the partial surfaces of the protection element. An independent claim is also included for a method for limiting transmitted optical performance in optical device.