Liquid Crystal Optical Image Attenuator.
DEPARTMENT OF THE NAVY WASHINGTON D C
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The invention is an optical image attenuator with an attenuation range of over 100,000. An optical lens device focuses the image on a first liquid crystal layer which scatters the directed light only when an electrical potential is applied to the layer, by means of transparent electrodes, and in proportion to the strength of potential applied. A proportion of the scattered light is absorbed within a coherent optic fiber plate or layer, the thickness and the spacing of the individual fibers of which can be varied to vary the contrast and attenuation of the system. Several stages may be stacked in series to obtain sufficiently high attenuation.
- Electrooptical and Optoelectronic Devices
- Fiber Optics and Integrated Optics