Abstract: A photoresist holographic technique in which the object modified and reference beam are of substantially the same average intensity, the photoresist is exposed for a long period of time and subsequently developed for a very short period of time.

Abstract: A method of constructing cylindrical holograms in which the image space is the entire space within the cylinder, and a method of constructing holograms on surfaces of other shapes, such as flat surfaces, both from original cylindrical hologram masters. The method uses cylindrical and other reflectors to recreate pseudoscopic images within the cylindrical volume of original cylindrical hologram masters and to form construction reference waves which are appropriate for the new holograms created within this image space.

Abstract: A three layer composite optical structure wherein a first layer is a substrate having surface variations holographically formed therein that contain phase information of a light pattern or object desired to be reconstructed from the element by reflection, a thin substantially uniform layer of material coated over that surface variation, and a third layer that overcoats the thin layer in order to form a substantially uniform thickness composite structure. The indices of refraction of the overcoating and the substrate are made substantially the same so that light transmitted through the element is neither diffracted nor refracted. The thin intermediate layer is disclosed to be either reflective metal or a substantially transparent layer having an index of refraction substantially different from that of the other two layers. Such an element has applications in sunglasses or as an addition to car or other windows.

Abstract: A method of constructing cross-section images similar to "computer assisted tomography," using optical data processing to replace the computer. The method uses incoherent light in the optical processor, thereby avoiding the noise and diffraction patterns inherent in images processed with coherent light. The method disclosed in this invention allows the processing to be carried out in real-time as the data are being collected.