초록 ▼

Image derogating optical noise due to light scattering of an object under examination, embedded in a light scattering medium, is substantially reduced by passing a modulated signal laser beam through the scattering medium, and interfering the emerging signal with a coherent modulated reference beam

Image derogating optical noise due to light scattering of an object under examination, embedded in a light scattering medium, is substantially reduced by passing a modulated signal laser beam through the scattering medium, and interfering the emerging signal with a coherent modulated reference beam to produce a hologram in a photorefractive member of the object, which in turn is read out of the crystal by a third unmodulated coherent beam to retrieve a clear image of the object. A smart pixel image convertor light valve may be substituted for the photorefractive member.

대표청구항 ▼

[ What is claimed is:] [1.] Method of retrieving a clear image of an object having its image passed through a three-dimensional light scattering medium which produces an unclear image comprising the steps of:(a) providing a real-time holographic storage member;(b) passing a modulated coherent signal

[ What is claimed is:] [1.] Method of retrieving a clear image of an object having its image passed through a three-dimensional light scattering medium which produces an unclear image comprising the steps of:(a) providing a real-time holographic storage member;(b) passing a modulated coherent signal light beam bearing said image and modulated by a particular modulation signal, through said three-dimensional light scattering medium for producing a noisy signal beam carrying said unclear image due to scattering of the light by said three-dimensional light scattering medium;(c) directing said noisy signal beam at said real time holographic storage member;(d) forming a hologram in said real-time holographic storage member by directing a modulated reference light beam, modulated by said particular modulation signal, coherent with respect to said modulated signal beam and unaffected by said light scattering medium at said real-time holographic storage medium during the performance of step (c);(e) reading out said hologram from said real-time holographic storage member to retrieve said clear image of said object substantially free of optical noise due to scatter within said scattering medium; and(f) wherein said modulated signal light beam is passed through an object and thereafter through said three-dimensional light scattering medium.