Abstract

Recording materials producing higher efficiency, low absorption holograms are usually photosensitive only to blue and uv light. If a hologram is formed at a blue wavelength in such a material and is illuminated at a red wavelength, generally the reconstructed wavefront is aberrated, and the resolution of the image is reduced. A method of hologram formation is described that can alleviate this problem. In this method, a hologram H₁ is formed first at the red wavelength λ₁ in a photographic emulsion. This hologram is then illuminated at the blue wavelength λ₂. The diffracted wave from H₁ is used as the subject wave for forming the desired high efficiency hologram H₂. If certain requirements are met, illumination of H₂ at λ₁ can produce an aberration-free reconstruction of the original subject wave. Experimental results of forming H₂ of a point source on dichromated gelatin film are presented. The hologram was formed at λ₂ = 4800 Å but could reconstruct an aberration-free wavefront at λ₁ = 6328 Å. The hologram had about 80% diffraction efficiency and essentially no absorption loss.

© 1971 Optical Society of America

Compensation of Aberrations due to a Wavelength Shift in Holography

J. M. Moran
Appl. Opt. 10(8) 1909-1913 (1971)

Computer-Based Analysis of Hologram Imagery and Aberrations II: Aberrations Induced by a Wavelength Shift

J. N. Latta
Appl. Opt. 10(3) 609-618 (1971)

Spatial Resolution of Relief Holograms in Dichromated Gelatin

D. Meyerhofer
Appl. Opt. 10(2) 416-421 (1971)

Hologram Formation in Hardened Dichromated Gelatin Films

L. H. Lin
Appl. Opt. 8(5) 963-966 (1969)

Computer-Based Analysis of Hologram Imagery and Aberrations. I. Hologram Types and Their Nonchromatic Aberrations

J. N. Latta
Appl. Opt. 10(3) 599-608 (1971)