Contour generation by wavefront reconstruction

Abstract

Abstract 1. A METHOD OF PRODUCING A MULTIPLE HOLOGRAM OF AN OBJECT COMPRISING: (A) DIRECTING A FIRST BEAM OF RADIATION ONTO THE OBJECT FROM A SOURCE OF COHERENT RADIATION, (B) POSITIONING A DETECTOR TO RECEIVE THE REFLECTED RADIATION FROM THE OBJECT, (C) DIRECTING A REFERENCE BEAM OF RADIATION AT A SELECTED ANGLE WITH RESPECT TO SAID FIRST BEAM ONTO THE DETECTOR FORM A SOURCE OF COHERENT RADIATION TO INTERFERE WITH THE REFLECTED RADIATION, THEREBY PRODUCING A PATTERN OF INTERFERENCE FRINGES ON THE DETECTOR, THE FIRST BEAM BEING COHERENT WITH RESPECT TO THE REFERENCE BEAM TO FORM A COOPERATING PAIR OF BEAMS, AND (D) DIRECTING A SECOND BEAM OF RADIATION ONTO THE OBJECT FOR REFLECTION OF RADIATION FROM THE OBJECT ONTO SAID DETECTOR WHILE ILLUMINATING SAID DETECTOR WITH SAID REFERENCE BEAM, SAID SECOND BEAM AND SAID REFERENCE BEAM BEING COHERENT TO PROVIDE A SECOND COOPERATING PAIR OF BEAMS HAVING A SELECTED ANGLE THEREBETWEEN, SAID FIRST AND SECOND BEAMS OF RADIATION HAVING A FINITE ANGLE THEREBETWEEN SO THAT UPON RECONSTRUCTION OF THE OBJECT THERE ARE PRODUCED MULTIPLE IMAGES OF THE OBJECT WHICH INTERFERE WITH EACH OTHER TO FORM INTERFERENCE BANDS.

Inventors

• 👤 Kenneth A Haines
• 👤 Bernard P Hildebrand

Bibliographic Details