A speckle correlation technique based on chirp modulation of the speckle interference
pattern is proposed and demonstrated for the measurement of 3-D rigid body motion. The …

The present work describes the use of a photorefractive correlator in the measurement of in-
plane displacement. A correlation technique has been proposed and demonstrated for …

A speckle correlation technique is proposed for the measurement of small object tilt.
Theoretical analysis is formulated for a general case of object tilt. Simulation and …

A new real-time phase-shifting readout system is developed for quantitative evaluation of full-
field correlation fringes obtained by means of Fourier filtering in speckle photography. The …

A photorefractive crystal (Bi_12GeO_20) is used to record double-exposure speckle patterns
produced by Q-switched laser pulses in real-time speckle metrology and velocimetry …

Real-time recording and optical processing of double exposure speckle patterns of light
scattered from both a stationary and moving solid are demonstrated in this paper. Pulsed …

A photorefractive time correlation motion detector is demonstrated. This device overcomes
the material response time limitation associated with other photorefractive motion detectors …

A two-beam coupled photorefractive novelty filter is presented for real-time measurement of
displacement components. In the optical configuration, the BaTiO 3 crystal is oriented such …

A technique has been proposed for the measurement of tilt of a diffuse object using speckle
fanning in a photorefractive BaTiO3 crystal. Free space geometry has been used for …

We proposed and experimentally studied a technique of vibration object monitoring. The
technique is based on self-diffraction of the speckle pattern on the adaptive correlation filter …