Patent ID: 6636278
Filing Date: 2003-10-21
Classification: H04N

Abstract:
A device for local attenuation of light intensity in a field of vision of at least one of a light-sensitive monitoring and/or recording device, the device comprising:a first objective having an image field and including at least one lens; a high resolution ferroelectric liquid crystal modulator arranged between two polarizers, the liquid crystal modulator including a photo-conductive layer and a downstream liquid crystal cell having helical smectic liquid crystals in contact with the photo-conductive layer, the liquid crystal modulator being arranged so that the photo-conductive layer is located in an image plane of the first objective; a second objective including at least one other lens, the image field of the first objective being imaged onto the monitoring and/or recording device by the second objective; and a mosaic color filter located upstream of the light-sensitive monitoring and/or recording device.