Abstract
Circular encoding in large areaimilti-exposure holographyR. Aliaga, P. Choi and H. ChuaquiaThe Blackett LaboratoryImperial College, London SW7 2BZ, U.K.ABSTRACTA novel method for encoding large number of large area holograms on the samerecording surface using a multi-.exposure scheme is presented. The separation betweeneach individual hologram is achieved by keeping constant the angle of incidence betweenthe object and reference beams, while the azimuthal angle of the plane that contains bothbeams is changed between successive exposures. The reconstructed image is thus arrangedalong the arc of a circle. Art image-plane configuration is used to record the hologram.The resulting focal spot of the real image in the reconstruction allows each image to beeasily separated with a suitable aperture even at high encoding density. The problemsassociated with the multi-exposure holographic technique, such as limited exposurelatitude and low signal to noise ratio, were reduced using a solution physical developer,CPA-i, with standard holographic plates. More than 200 individual holograms wererecorded on one single plate with the upper limit possible measured to exceed 1000.
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