Accession Number : AD0602525

Title :   INVESTIGATION OF LASER BEAM CROSS-SECTION WITH RESPECT TO INTENSITY AND TIME.

Descriptive Note : Quarterly progress rept. no. 3, 1 Jan-31 Mar 63,

Corporate Author : DAYTON UNIV OHIO RESEARCH INST

Personal Author(s) : Rambauske,Werner ; barnoski,Michael K.

Report Date : 31 MAR 1963

Pagination or Media Count : 72

Abstract : In order to extract information concerning various targets by monitoring the nature of laser light reflections from these targets, it is essential that the radiation incident on the target be known. If this, in addition to the reflected radiation, was 'unknown', there would not exist a base for comparison. Thus the nature of the intensity and time variation across the cross-section of the laser beam must be pre-determined. It was discovered that no two points in the beam's cross-section displayed the same intensity versus time variation. These results were obtained by utilizing two identical detection systems positioned at various points in the beam's cross-section. Photographic recording of the dual beam scope traces are included in the report. In addition to this, the average intensity over a 50 microsecond interval versus lateral distance through the beam was determined and the results plotted. A bell-shaped curve was obtained. Further investigation of the observed phenomena in the beam's cross-section is required. (Author)

Descriptors :   (*LASERS, OPTICAL PROPERTIES), LIGHT PULSES, REFLECTION, RECORDING SYSTEMS, OPTICAL EQUIPMENT, OSCILLOSCOPES, DETECTORS, PHOTOMULTIPLIER TUBES, CIRCUITS, POLYNOMIALS, RUBY, TIME, INTENSITY

Distribution Statement : APPROVED FOR PUBLIC RELEASE