Novel real-time joint-transform correlation by use of acousto-optic heterodyning

Novel real-time joint-transform correlation by use of acousto-optic heterodyning.

To replace the film recording aspect of performing optical correlation, conventional real-time joint-transform correlation (JTC) optical systems make use of a spatial light modulator (SLM) located in the Fourier plane to record the joint-transform power spectrum (JPS) to achieve real-time processing. The use of an SLM in the Fourier plane, however, is a major drawback in these systems because S...

Optical transfer function of an acousto-optic heterodyning image processor.

Image processing by means of an interactive pupil technique is described. A Bragg-diffraction sound cell is used to achieve both wave-front division and temporal-carrier offset.

Acousto - Optic Isolator ( Aoi )

, Real - Time Display of 3 - D Computed Holograms by Scanning the Image of an Acousto - Optic Modulator

We describe the implementation of a system which enables a user to interact with and modify an electronic holographic image using a force-feedback device. The force-feedback (or haptic) device is capable of sensing and reporting the 3D position of its hand-held stylus and displaying appropriate forces to the user. Thus, a user can feel and modify algorithmically specified shapes in the haptic w...

Real-time holographic display: Improvements using a multichannel acousto-optic modulator and holographic optical elements

Any practical holographic display device relying on the MIT synthetic aperture approach will require timebandwith products far exceeding those available with single channel acousto-optic modulators (AOMs). A solution to this problem is to use a multichannel AOM, thus making use of the parallelism inherent in optical systems. It is now technically feasible to accomodate a large number of acousti...