Abstract: A process for producing a color holographic optical element in a real-time interactive multi-channel auto-stereoscopic color image display system, including producing light comprising at least three different monochromatic parts of the optical spectrum from one or more lasers and illuminating a holographic plate with the light from different directions and recorded on a panchromatic light sensitive recording material coated on a suitable substrate.

Abstract: A process for producing a color holographic optical element in a real-time interactive multi-channel auto-stereoscopic color image display system, including producing light comprising at least three different monochromatic parts of the optical spectrum from one or more lasers and illuminating a holographic plate with the light from different directions and recorded on a panchromatic light sensitive recording material coated on a suitable substrate.

Abstract: Apparatus and methods for high resolution holographic recordation and microscopic examination of the holographic image of biological tissue. A single beam Denisyuk holographic recordation of the biological tissue is obtained with direct contact or close proximity to the tissue. Contrast enhancement by staining with a dye selected to maximize absorption of the light frequency used to record the hologram is used to improve contrast and resolution. A liquid interface is formed between the recording film and the subject tissue to improve image quality and resolution. The resulting high resolution three dimensional holographic images may be examined under microscope magnification for such applications as medical biopsy.

Abstract: A first photographic image (1) in the form of a hologram of the tooth (2) and location points (3) near the tooth taken on the occasion of the first examination is placed alongside a second photographic image (4') in the form of a hologram of the tooth (2') and location points (3') near the tooth taken on the occasion of the second examination. Adjusting devices (5, 6, 7) are provided to permit the displacement of the first photographic image (1) relative to the second photographic image (4'). This will bring the location points (3) on the first photographic image into line with the location points (3') on the second photographic image (4'), whereupon the displacement of the tooth (2) may be determined as the difference between the position of the tooth in the first photographic image (1) and the position of the tooth in the second photographic image (4').

Abstract: A holographic system for recording movements of body surfaces of a patient characterized by a source of coherent light projecting on the body surface to create an object wave and having a portion of the light as a reference wave, a film carrier for photographic film disposed to simultaneously record the object and reference waves as a hologram and switching devices which are activated by a transmitter device sensing cardiac activity for double pulse switching of the source at predetermined intervals so that the two separate holograms of the body surface are recorded with each hologram being at a different time interval of the movement of the body. The present invention enables the two holograms which are recorded on the film to be recorded at given points in a cardiac activity of the patient such as given points of the EKG cycle of the patient.

Abstract: A method for establishing and reading secret information using holographic interference pattern techniques. A holographic plate is placed in a holder and exposed with a laser light reflected from an object and a reference laser light to create a hologram. The exposed hologram is removed and a second holographic plate is inserted into the holder. The object, which may be a matrix, is selectively deformed to provide letters or numbers in accordance with the secret information to be established. The second holographic plate is then exposed with a light reflected from the deformed object and with the reference laser light to create a second hologram. The information contained on each hologram, when viewed individually, appears to be substantially identical. However, when the two holograms are later combined and illuminated, the secret information in the form of a holographic interference pattern will be observed in the hologram.