| 摘要 |
The invention relates to an intensity-dependent light modulating device, wherein said light successively passes through a polarizer, a first phase retardation plate and a first light modulator; the light then strikes a mirror and from there on, it passes once again through the light modulator and the phase retardation plate in the opposite direction and then strikes an analyzer that is crossed relative to the polarizer. The light modulator and the phase retardation plate are respectively located in an electric field in which the indicatrices of the light modulator and the phase retardation plate are deflected, wherein the deflection of the indicatrix of the light modulator is intensity-dependent. Due to the passage of light through the phase retardation plate and the light modulator, an intensity-dependent rotation of the direction of polarization occurs in such a way that higher intensity light is filtered in the analyzer while lower intensity light is transmitted. A preferred embodiment relates to a telescope, which is directed at an intensive light source in front of a dark background, said telescope only filtering the intensive light source while the background can be simultaneously observed during almost the entire transmission.
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