Geometry of recording and color sensitivity for evanescent wave holography using a Gaussian beam.

The thick phase-diffraction grating (an elementary hologram) is considered which is obtained as a result of the interference of a plane or inhomogeneous object wave with an evanescent wave in the photographic emulsion resulting from the total reflection of a Gaussian reference beam at the emulsion surface. The linear theory of diffraction efficiencies in weak diffraction approximation for normally polarized light is formulated. Using a digital computer the geometry of the recording process is optimized, and the uncertainty factor of the conventional Bragg condition discussed.