A new method is proposed for reducing speckle in the far field. The degree of coherence of
an illuminating laser beam is phase-modulated via light-ultrasound interactions so that …

Laser light, which is doubly phase modulated by an ultrasonic wave, can be utilized for
speckle reduction. The double phase modulation is found to be more effective for speckle …

A theoretical and experimental study of speckle, as applied to ultrasonic imaging, is
presented. The concept of laser speckle is briefly reviewed and is used as a starting point to …

The present article reports a new technique for elimination of speckle noise. The method is
based on the fact that if the state of polarisation of the illuminating beam is changed the …

In laser front projection display, the observer in the far field of the image pixels on the screen
will observe serious speckle noise. For the first time we show a way to eliminate speckles in …

Speckle phenomena have been investigated by many investigators.[1] George [2] recently
demonstrated that speckle can be decorrelated using a bandlimited and multitoned …

We have measured the rates of ultrasonic Bmode speckle pattern changes as a function of
the change in center frequency of the transmitted acoustical pulse under a variety of …

Speckle reduction by wavelength and space diversity using a semiconductor laser clickable
element to expand a topic LOGIN OR CREATE ACCOUNT PRISM SUBMISSION This website …

The occurrence and smoothing of speckle are studied as a function of the line width for a
highly collimated illuminating source. A general theory is presented for speckling in the …

The moving aperture and the moving random mask are two methods suggested for speckle
reduction in recording images of diffuse objects with coherent light. An analysis is given that …