Production of diffraction limited holographic images

Details Production of diffraction limited holographic images Production of diffraction limited holographic images

1982-02-12

1984-10-23

Arnold, Bruce Y.

350 36, 350 385, 350 386, G03H 102, G03H 122

Patent

active

044784813

ABSTRACT:
An apparatus for the production of a holographic image of a subject disposed at a subject plane includes a source of coherent light divided by a beamsplitter into a reference beam and a subject beam. The subject beam is directed towards the subject through a beamsplitter and a quarter-wave plate. The front surface of an opaque subject or a mirror behind a transparent subject reflects the subject beam back through the quarter-wave plate to the beamsplitter where it is deflected towards a photo-sensitive recording medium through an imaging lens. The reference beam is simultaneously directed toward the recording medium at a predetermined angle of incidence. After exposure and development of the medium, it is illuminated from the conjugate direction by the redirected reference beam. Image rays exactly retrace their original paths back through the optical system and provide a three-dimensional real-image reconstruction at the subject plane. The images produced may be microscopically examined or studied through optical processing and interferrometric techniques. A method utilizing the above-described apparatus is also disclosed.

REFERENCES:
patent: 4000949 (1977-01-01), Watkins
patent: 4299443 (1981-11-01), Minami et al.
Harris et al., Stroboscopic Interferometer, Applied Optics, vol. 18, No. 14, Jul. 15, 1979, pp. 2368-2371.
Toth and Collings, "Reconstruction of a Three-Dimensional Microscope Sample Using Holographic Techniques", 13 Appl. Phys. Letters, 7, (1968).
Leith and Upatnieks, "Microscopy by Wavefront Reconstruction", 55, J. Opt. Soc. Americ., 569.
Briones, Heflinger and Wuerker, "Holographic Microscopy", 17, Appl. Optics, 1944, (1978).

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