ABSTRACT
A method to measure three-dimensional displacements through a speckle technique is proposed. This measurement is possible by adding a diffraction grating to the classical bidimensional Burch experimental setup. The principle is described and results are discussed.
ABSTRACT
This Technical Note is a comment on the imaging properties of the double-slit camera. We show its application to the correction of geometrical distortions and propose some other possibilities.
ABSTRACT
A new technique is proposed to perform several image-processing operations with the same optical system. Each operation can easily be selected by properly loading a birefringent photoelastic plate, which acts as the spatial filter of the-system. Thus different pupil transmittance configurations can be achieved, each of which is associated with a certain image transformation.
ABSTRACT
A method for displaying the complex degree of coherence (CDC) of a quasi-monochromatic spatially incoherent source is proposed. The phase of the CDC is encoded in a method similar to that used in interferometric imaging with incoherent light. The method is based on Fourier analysis of the speckle pattern that appears when a diffuser is illuminated with the partially coherent field whose CDC is to be displayed. In addition, an intensity pattern that resembles the spatial distribution of the incoherent source can also be obtained.
