Laser Speckle Pattern-A Narrowband Noise Model

Abstract

We represent by an electrical model the imaging of a one-dimensional coherently illuminated and diffusely reflecting surface by an optical system with a rectangular aperture. We then obtain the statistical properties of the image intensity from the statistical properties of the square of the envelope of a narrowband noise signal in the electrical model. The analysis is simple because use can be made of results known in communication theory. The results agree with those obtained in a direct way.