Showing papers on "Signal beam published in 1973"
Patent•
12 Mar 1973TL;DR: In this article, a method for coded, sequential, non-coherent, redundant, optical data storage where a number of one-dimensional holograms is recorded in a timed succession upon a light-sensitive tape through the utilization of a pulse amplitude-modulated light beam and a correction light beam of the light sensitive tape is presented.
Abstract: A method for coded, sequential, non-coherent, redundant, optical data storage wherein a number of one-dimensional holograms is recorded in a timed succession upon a light-sensitive tape through the utilization of a pulse amplitude-modulated light beam and a correction light beam of the light-sensitive tape is separately effected from the signal beam with respect to space and time in such a way that the entire exposure resulting from the signal exposure beam and the correction exposure beam is constant during each recordation, and wherein either the pulse amplitude- modulated light beam or the correction exposure beam are modulated with a noise intensity with respect to time in such a way that the contrast of the individual recorded holograms varies statistically.
11 citations
TL;DR: A new holographic technique has been developed that allows the resolution of front surface detail to be holographically recorded from a scene having a relatively large total motion during the exposure, i.e., the total motion of the scene during the Exposure is large, relative to the allowed path length change of the signal beam.
Abstract: A new holographic technique has been developed that allows the resolution of front surface detail to be holographically recorded from a scene having a relatively large total motion during the exposure, i.e., the total motion of the scene during the exposure is large, relative to the allowed path length change of the signal beam. The new technique has been employed as a holographic camera and consequently produced the first real-time, true three-dimensional motion picture of a moving scene with resolution of front surface detail [ R. L. Kurtz L. M. Perry , Appl. Opt.12, 888 ( 1973)]. A composite of this technique provides for the moving scene to have a randomly oriented velocity vector. Evidence of the maximum allowable total scene motion for a single velocity component is provided where the laser source was a continuous wave argon laser.
6 citations
01 May 1973
TL;DR: In this paper, the authors considered the conversion of infra-red radiation into visible in a proustite crystal with the pump and signal waves perpendicular to each other and determined the angular and spectral parameters as well as the efficiency of such interactions.
Abstract: The conversion is considered of infra-red radiation into visible in a proustite crystal with the pump and signal waves perpendicular to each other. The angular and spectral parameters as well as the efficiency of such interactions are determined.
1 citations