Etat Francais Represente Par Le Ministre Des Postes, Telecommunications

Etat Francais (centre National D'etudes Des Telecommunications)

Etat Francais Represente Par Le Ministre Des Postes, Telecommunications Et De L'espace

Gabriel Sirat

Eric Dufresne

Didier Charlot

Alain Maruani

Gabriel Y Sirat

Pierre Chavel

A holographic apparatus of the type comprising a conoscopic system including a birefringent crystal inserted between two polarizers, wherein the apparatus also includes an aperture angle limiter inserted on the path of the light rays and wherein one of the birefringent crystal and the aperture angle limiter is disposed off the optical axis of the apparatus.

Holographic apparatus using incoherent light

A method of generating a quasi-complex hologram using incoherent light and a conoscope system comprising a birefringent crystal (30) inserted between two circular polarizers (10, 20), the method comprising the following steps: (i) recording a plurality of different conoscopic holograms of the same object without relative displacement thereof and with respective different polarization configurations; and (ii) combining the various conoscopic holograms obtained in this way in order to remove the bias and the conjugate image. The invention also relates to a device for implementing the method.

Holographic method and apparatus using incoherent light

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Paris, France

Eric Dufresne