Accession Number : ADP008609

Title :   Spatial Noise Reduction in Array Illuminators,

Corporate Author : NEC RESEARCH INST INC PRINCETON NJ

Personal Author(s) : Lohmann, Adlof W. ; Sinzinger, Stefan O.

Report Date : 22 MAY 1992

Pagination or Media Count : 3

Abstract : An ideal array illuminator would provide equal amounts of light power to all elements of an array of gates or smart pixels. Existing array illuminators (AIL) achieve a homogeneity of 5 to 10%. That may seem to be good enough, if the signals are binary. however, it is desirable to achieve the best possible homogeneity, since there might be other causes for inhomogeneous behavior of the array system. Having a good AIL relieves the burden of tolerances for the other components of the overall system. In our proposed systems it will not be essential that all lasers operate at the same power level. The homogeneity of AIL output will not suffer even if one of the lasers breaks down completely. Hence, our systems will be favorable in terms of life time and manufacturing yield.

Descriptors :   *LASER BEAMS, *ILLUMINATION, *ELECTROMAGNETIC WAVE PROPAGATION, *LIGHT TRANSMISSION, NOISE REDUCTION, POWER LEVELS, SIGNAL PROCESSING, ARRAYS.

Subject Categories : Optics
      Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE